11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * S390 version 3a53c8fab3f87c995c30ac226a03af95361243144Heiko Carstens * Copyright IBM Corp. 1999, 2000 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Author(s): Hartmut Penner (hp@de.ibm.com) 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Ulrich Weigand (weigand@de.ibm.com) 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Martin Schwidefsky (schwidefsky@de.ibm.com) 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Derived from "include/asm-i386/pgtable.h" 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifndef _ASM_S390_PGTABLE_H 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define _ASM_S390_PGTABLE_H 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The Linux memory management assumes a three-level page table setup. For 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * s390 31 bit we "fold" the mid level into the top-level page table, so 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * that we physically have the same two-level page table as the s390 mmu 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * expects in 31 bit mode. For s390 64 bit we use three of the five levels 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the hardware provides (region first and region second tables are not 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * used). 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The "pgd_xxx()" functions are trivial for a folded two-level 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * setup: the pgd is never bad, and a pmd always exists (as it's folded 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * into the pgd entry) 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This file contains the functions and defines necessary to modify and use 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the S390 page table tree. 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifndef __ASSEMBLY__ 309789db08c020193ae18826c3aa48bd24296f7848Heiko Carstens#include <linux/sched.h> 312dcea57ae19275451a756a2d5bf96b329487b0e0Heiko Carstens#include <linux/mm_types.h> 32abf09bed3cceadd809f0356065c2ada6cee90d4aMartin Schwidefsky#include <linux/page-flags.h> 33527e30b41d8b86e9ae7f5b740de416958c0e574eMartin Schwidefsky#include <linux/radix-tree.h> 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/bug.h> 35b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky#include <asm/page.h> 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsextern pgd_t swapper_pg_dir[] __attribute__ ((aligned (4096))); 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsextern void paging_init(void); 392b67fc46061b2171fb8fbb55d1ac717abd533569Heiko Carstensextern void vmem_map_init(void); 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The S390 doesn't have any external MMU info: the kernel page 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * tables contain all the necessary information. 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 454b3073e1c53a256275f1079c0fbfbe85883d9275Russell King#define update_mmu_cache(vma, address, ptep) do { } while (0) 46b113da65785d5f3f9ff1451ec0fe43d6d76da25bDavid Miller#define update_mmu_cache_pmd(vma, address, ptep) do { } while (0) 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 49238ec4efeee4461d5cff2ed3e5a15a3ab850959bMartin Schwidefsky * ZERO_PAGE is a global shared page that is always zero; used 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for zero-mapped memory areas etc.. 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 52238ec4efeee4461d5cff2ed3e5a15a3ab850959bMartin Schwidefsky 53238ec4efeee4461d5cff2ed3e5a15a3ab850959bMartin Schwidefskyextern unsigned long empty_zero_page; 54238ec4efeee4461d5cff2ed3e5a15a3ab850959bMartin Schwidefskyextern unsigned long zero_page_mask; 55238ec4efeee4461d5cff2ed3e5a15a3ab850959bMartin Schwidefsky 56238ec4efeee4461d5cff2ed3e5a15a3ab850959bMartin Schwidefsky#define ZERO_PAGE(vaddr) \ 57238ec4efeee4461d5cff2ed3e5a15a3ab850959bMartin Schwidefsky (virt_to_page((void *)(empty_zero_page + \ 58238ec4efeee4461d5cff2ed3e5a15a3ab850959bMartin Schwidefsky (((unsigned long)(vaddr)) &zero_page_mask)))) 59816422ad76474fed8052b6f7b905a054d082e59aKirill A. Shutemov#define __HAVE_COLOR_ZERO_PAGE 60238ec4efeee4461d5cff2ed3e5a15a3ab850959bMartin Schwidefsky 614f2e29031e6c67802e7370292dd050fd62f337eeLinus Torvalds/* TODO: s390 cannot support io_remap_pfn_range... */ 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* !__ASSEMBLY__ */ 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * PMD_SHIFT determines the size of the area a second-level page 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * table can map 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * PGDIR_SHIFT determines what a third-level page table entry can map 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 69f4815ac6c935b8e441fe12504d62e0e8ff7f7ce5Heiko Carstens#ifndef CONFIG_64BIT 70146e4b3c8b92071b18f0b2e6f47165bad4f9e825Martin Schwidefsky# define PMD_SHIFT 20 71146e4b3c8b92071b18f0b2e6f47165bad4f9e825Martin Schwidefsky# define PUD_SHIFT 20 72146e4b3c8b92071b18f0b2e6f47165bad4f9e825Martin Schwidefsky# define PGDIR_SHIFT 20 73f4815ac6c935b8e441fe12504d62e0e8ff7f7ce5Heiko Carstens#else /* CONFIG_64BIT */ 74146e4b3c8b92071b18f0b2e6f47165bad4f9e825Martin Schwidefsky# define PMD_SHIFT 20 75190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky# define PUD_SHIFT 31 765a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky# define PGDIR_SHIFT 42 77f4815ac6c935b8e441fe12504d62e0e8ff7f7ce5Heiko Carstens#endif /* CONFIG_64BIT */ 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define PMD_SIZE (1UL << PMD_SHIFT) 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define PMD_MASK (~(PMD_SIZE-1)) 81190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky#define PUD_SIZE (1UL << PUD_SHIFT) 82190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky#define PUD_MASK (~(PUD_SIZE-1)) 835a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky#define PGDIR_SIZE (1UL << PGDIR_SHIFT) 845a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky#define PGDIR_MASK (~(PGDIR_SIZE-1)) 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * entries per page directory level: the S390 is two-level, so 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * we don't really have any PMD directory physically. 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for S390 segment-table entries are combined to one PGD 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * that leads to 1024 pte per pgd 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 92146e4b3c8b92071b18f0b2e6f47165bad4f9e825Martin Schwidefsky#define PTRS_PER_PTE 256 93f4815ac6c935b8e441fe12504d62e0e8ff7f7ce5Heiko Carstens#ifndef CONFIG_64BIT 94146e4b3c8b92071b18f0b2e6f47165bad4f9e825Martin Schwidefsky#define PTRS_PER_PMD 1 955a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky#define PTRS_PER_PUD 1 96f4815ac6c935b8e441fe12504d62e0e8ff7f7ce5Heiko Carstens#else /* CONFIG_64BIT */ 97146e4b3c8b92071b18f0b2e6f47165bad4f9e825Martin Schwidefsky#define PTRS_PER_PMD 2048 985a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky#define PTRS_PER_PUD 2048 99f4815ac6c935b8e441fe12504d62e0e8ff7f7ce5Heiko Carstens#endif /* CONFIG_64BIT */ 100146e4b3c8b92071b18f0b2e6f47165bad4f9e825Martin Schwidefsky#define PTRS_PER_PGD 2048 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 102d455a3696c72283923e6870e9e4fe1daa861d7cdHugh Dickins#define FIRST_USER_ADDRESS 0 103d455a3696c72283923e6870e9e4fe1daa861d7cdHugh Dickins 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define pte_ERROR(e) \ 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s:%d: bad pte %p.\n", __FILE__, __LINE__, (void *) pte_val(e)) 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define pmd_ERROR(e) \ 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s:%d: bad pmd %p.\n", __FILE__, __LINE__, (void *) pmd_val(e)) 108190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky#define pud_ERROR(e) \ 109190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky printk("%s:%d: bad pud %p.\n", __FILE__, __LINE__, (void *) pud_val(e)) 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define pgd_ERROR(e) \ 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s:%d: bad pgd %p.\n", __FILE__, __LINE__, (void *) pgd_val(e)) 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifndef __ASSEMBLY__ 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 115c972cc60c23f5a6309292bfcc91a441743ba027eHeiko Carstens * The vmalloc and module area will always be on the topmost area of the kernel 116c972cc60c23f5a6309292bfcc91a441743ba027eHeiko Carstens * mapping. We reserve 96MB (31bit) / 128GB (64bit) for vmalloc and modules. 117c972cc60c23f5a6309292bfcc91a441743ba027eHeiko Carstens * On 64 bit kernels we have a 2GB area at the top of the vmalloc area where 118c972cc60c23f5a6309292bfcc91a441743ba027eHeiko Carstens * modules will reside. That makes sure that inter module branches always 119c972cc60c23f5a6309292bfcc91a441743ba027eHeiko Carstens * happen without trampolines and in addition the placement within a 2GB frame 120c972cc60c23f5a6309292bfcc91a441743ba027eHeiko Carstens * is branch prediction unit friendly. 1218b62bc9642300471737bc3b77b2a4a2ead46dedbHeiko Carstens */ 122239a64255fae8933d95273b5b92545949ca4e743Heiko Carstensextern unsigned long VMALLOC_START; 12314045ebf1e1156d966a796cacad91028e01797e5Martin Schwidefskyextern unsigned long VMALLOC_END; 12414045ebf1e1156d966a796cacad91028e01797e5Martin Schwidefskyextern struct page *vmemmap; 125239a64255fae8933d95273b5b92545949ca4e743Heiko Carstens 12614045ebf1e1156d966a796cacad91028e01797e5Martin Schwidefsky#define VMEM_MAX_PHYS ((unsigned long) vmemmap) 1275fd9c6e214547a32d3da6ee4284c79004d667bc8Christian Borntraeger 128c972cc60c23f5a6309292bfcc91a441743ba027eHeiko Carstens#ifdef CONFIG_64BIT 129c972cc60c23f5a6309292bfcc91a441743ba027eHeiko Carstensextern unsigned long MODULES_VADDR; 130c972cc60c23f5a6309292bfcc91a441743ba027eHeiko Carstensextern unsigned long MODULES_END; 131c972cc60c23f5a6309292bfcc91a441743ba027eHeiko Carstens#define MODULES_VADDR MODULES_VADDR 132c972cc60c23f5a6309292bfcc91a441743ba027eHeiko Carstens#define MODULES_END MODULES_END 133c972cc60c23f5a6309292bfcc91a441743ba027eHeiko Carstens#define MODULES_LEN (1UL << 31) 134c972cc60c23f5a6309292bfcc91a441743ba027eHeiko Carstens#endif 135c972cc60c23f5a6309292bfcc91a441743ba027eHeiko Carstens 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * A 31 bit pagetable entry of S390 has following format: 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * | PFRA | | OS | 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0 0IP0 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 00000000001111111111222222222233 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 01234567890123456789012345678901 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * I Page-Invalid Bit: Page is not available for address-translation 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * P Page-Protection Bit: Store access not possible for page 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * A 31 bit segmenttable entry of S390 has following format: 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * | P-table origin | |PTL 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0 IC 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 00000000001111111111222222222233 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 01234567890123456789012345678901 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * I Segment-Invalid Bit: Segment is not available for address-translation 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * C Common-Segment Bit: Segment is not private (PoP 3-30) 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * PTL Page-Table-Length: Page-table length (PTL+1*16 entries -> up to 256) 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The 31 bit segmenttable origin of S390 has following format: 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * |S-table origin | | STL | 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * X **GPS 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 00000000001111111111222222222233 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 01234567890123456789012345678901 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * X Space-Switch event: 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * G Segment-Invalid Bit: * 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * P Private-Space Bit: Segment is not private (PoP 3-30) 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * S Storage-Alteration: 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * STL Segment-Table-Length: Segment-table length (STL+1*16 entries -> up to 2048) 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * A 64 bit pagetable entry of S390 has following format: 1706a985c6194017de2c062916ad1cd00dee0302c40Christian Borntraeger * | PFRA |0IPC| OS | 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0000000000111111111122222222223333333333444444444455555555556666 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0123456789012345678901234567890123456789012345678901234567890123 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * I Page-Invalid Bit: Page is not available for address-translation 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * P Page-Protection Bit: Store access not possible for page 1766a985c6194017de2c062916ad1cd00dee0302c40Christian Borntraeger * C Change-bit override: HW is not required to set change bit 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * A 64 bit segmenttable entry of S390 has following format: 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * | P-table origin | TT 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0000000000111111111122222222223333333333444444444455555555556666 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0123456789012345678901234567890123456789012345678901234567890123 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * I Segment-Invalid Bit: Segment is not available for address-translation 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * C Common-Segment Bit: Segment is not private (PoP 3-30) 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * P Page-Protection Bit: Store access not possible for page 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * TT Type 00 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * A 64 bit region table entry of S390 has following format: 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * | S-table origin | TF TTTL 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0000000000111111111122222222223333333333444444444455555555556666 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0123456789012345678901234567890123456789012345678901234567890123 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * I Segment-Invalid Bit: Segment is not available for address-translation 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * TT Type 01 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * TF 196190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky * TL Table length 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The 64 bit regiontable origin of S390 has following format: 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * | region table origon | DTTL 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0000000000111111111122222222223333333333444444444455555555556666 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0123456789012345678901234567890123456789012345678901234567890123 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * X Space-Switch event: 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * G Segment-Invalid Bit: 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * P Private-Space Bit: 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * S Storage-Alteration: 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * R Real space 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * TL Table-Length: 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * A storage key has the following format: 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * | ACC |F|R|C|0| 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0 3 4 5 6 7 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ACC: access key 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * F : fetch protection bit 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * R : referenced bit 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * C : changed bit 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Hardware bits in the page table entry */ 220e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define _PAGE_PROTECT 0x200 /* HW read-only bit */ 221833774849d50a59f58e9bdfc3d9c88e682b3596dMartin Schwidefsky#define _PAGE_INVALID 0x400 /* HW invalid bit */ 222e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define _PAGE_LARGE 0x800 /* Bit to mark a large pte */ 2233610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky 2243610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky/* Software bits in the page table entry */ 225e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define _PAGE_PRESENT 0x001 /* SW pte present bit */ 226e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define _PAGE_TYPE 0x002 /* SW pte type bit */ 227e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define _PAGE_YOUNG 0x004 /* SW pte young bit */ 228e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define _PAGE_DIRTY 0x008 /* SW pte dirty bit */ 2290944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky#define _PAGE_READ 0x010 /* SW pte read bit */ 2300944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky#define _PAGE_WRITE 0x020 /* SW pte write bit */ 2310944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky#define _PAGE_SPECIAL 0x040 /* SW associated with special page */ 232b31288fa83b2bcc8834e1e208e9526b8bd5ce361Konstantin Weitz#define _PAGE_UNUSED 0x080 /* SW bit for pgste usage state */ 233a08cb629f546d1cecebe955392197f226e58dbe1Nick Piggin#define __HAVE_ARCH_PTE_SPECIAL 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 235138c9021ca68d6f8a6fac3418995fee102a3cc22Nick Piggin/* Set of bits not changed in pte_modify */ 2366a5c1482e2b700e89f174ddb42434b37f15abccdHeiko Carstens#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_SPECIAL | _PAGE_DIRTY | \ 2376a5c1482e2b700e89f174ddb42434b37f15abccdHeiko Carstens _PAGE_YOUNG) 23853492b1de46a7576170e865062ffcfc93bb5650bGerald Schaefer 23953492b1de46a7576170e865062ffcfc93bb5650bGerald Schaefer/* 240e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky * handle_pte_fault uses pte_present, pte_none and pte_file to find out the 241e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky * pte type WITHOUT holding the page table lock. The _PAGE_PRESENT bit 242e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky * is used to distinguish present from not-present ptes. It is changed only 243e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky * with the page table lock held. 244833774849d50a59f58e9bdfc3d9c88e682b3596dMartin Schwidefsky * 245e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky * The following table gives the different possible bit combinations for 246e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky * the pte hardware and software bits in the last 12 bits of a pte: 247833774849d50a59f58e9bdfc3d9c88e682b3596dMartin Schwidefsky * 2480944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * 842100000000 2490944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * 000084210000 2500944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * 000000008421 2510944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * .IR...wrdytp 2520944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * empty .10...000000 2530944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * swap .10...xxxx10 2540944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * file .11...xxxxx0 2550944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * prot-none, clean, old .11...000001 2560944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * prot-none, clean, young .11...000101 2570944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * prot-none, dirty, old .10...001001 2580944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * prot-none, dirty, young .10...001101 2590944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * read-only, clean, old .11...010001 2600944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * read-only, clean, young .01...010101 2610944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * read-only, dirty, old .11...011001 2620944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * read-only, dirty, young .01...011101 2630944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * read-write, clean, old .11...110001 2640944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * read-write, clean, young .01...110101 2650944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * read-write, dirty, old .10...111001 2660944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * read-write, dirty, young .00...111101 267e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky * 268e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky * pte_present is true for the bit pattern .xx...xxxxx1, (pte & 0x001) == 0x001 269e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky * pte_none is true for the bit pattern .10...xxxx00, (pte & 0x603) == 0x400 270e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky * pte_file is true for the bit pattern .11...xxxxx0, (pte & 0x601) == 0x600 271e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky * pte_swap is true for the bit pattern .10...xxxx10, (pte & 0x603) == 0x402 272833774849d50a59f58e9bdfc3d9c88e682b3596dMartin Schwidefsky */ 273833774849d50a59f58e9bdfc3d9c88e682b3596dMartin Schwidefsky 274f4815ac6c935b8e441fe12504d62e0e8ff7f7ce5Heiko Carstens#ifndef CONFIG_64BIT 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2763610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky/* Bits in the segment table address-space-control-element */ 2773610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _ASCE_SPACE_SWITCH 0x80000000UL /* space switch event */ 2783610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _ASCE_ORIGIN_MASK 0x7ffff000UL /* segment table origin */ 2793610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _ASCE_PRIVATE_SPACE 0x100 /* private space control */ 2803610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _ASCE_ALT_EVENT 0x80 /* storage alteration event control */ 2813610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _ASCE_TABLE_LENGTH 0x7f /* 128 x 64 entries = 8k */ 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2833610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky/* Bits in the segment table entry */ 2840944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky#define _SEGMENT_ENTRY_BITS 0x7fffffffUL /* Valid segment table bits */ 2853610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _SEGMENT_ENTRY_ORIGIN 0x7fffffc0UL /* page table origin */ 286e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define _SEGMENT_ENTRY_PROTECT 0x200 /* page protection bit */ 287e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define _SEGMENT_ENTRY_INVALID 0x20 /* invalid segment table entry */ 2883610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _SEGMENT_ENTRY_COMMON 0x10 /* common segment bit */ 2893610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _SEGMENT_ENTRY_PTL 0x0f /* page table length */ 290152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky 291152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky#define _SEGMENT_ENTRY_DIRTY 0 /* No sw dirty bit for 31-bit */ 292152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky#define _SEGMENT_ENTRY_YOUNG 0 /* No sw young bit for 31-bit */ 293152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky#define _SEGMENT_ENTRY_READ 0 /* No sw read bit for 31-bit */ 294152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky#define _SEGMENT_ENTRY_WRITE 0 /* No sw write bit for 31-bit */ 295152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky#define _SEGMENT_ENTRY_LARGE 0 /* No large pages for 31-bit */ 296152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky#define _SEGMENT_ENTRY_BITS_LARGE 0 297152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky#define _SEGMENT_ENTRY_ORIGIN_LARGE 0 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2993610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _SEGMENT_ENTRY (_SEGMENT_ENTRY_PTL) 300e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define _SEGMENT_ENTRY_EMPTY (_SEGMENT_ENTRY_INVALID) 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3020944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky/* 3030944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * Segment table entry encoding (I = invalid, R = read-only bit): 3040944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * ..R...I..... 3050944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * prot-none ..1...1..... 3060944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * read-only ..1...0..... 3070944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * read-write ..0...0..... 3080944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * empty ..0...1..... 3090944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky */ 3100944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky 3116c61cfe91be53b444abc1da2dbab14efa77706c0Martin Schwidefsky/* Page status table bits for virtualization */ 3120d0dafc1e48fd254c22f75738def870a7ffd2c3eMartin Schwidefsky#define PGSTE_ACC_BITS 0xf0000000UL 3130d0dafc1e48fd254c22f75738def870a7ffd2c3eMartin Schwidefsky#define PGSTE_FP_BIT 0x08000000UL 3140d0dafc1e48fd254c22f75738def870a7ffd2c3eMartin Schwidefsky#define PGSTE_PCL_BIT 0x00800000UL 3150d0dafc1e48fd254c22f75738def870a7ffd2c3eMartin Schwidefsky#define PGSTE_HR_BIT 0x00400000UL 3160d0dafc1e48fd254c22f75738def870a7ffd2c3eMartin Schwidefsky#define PGSTE_HC_BIT 0x00200000UL 3170d0dafc1e48fd254c22f75738def870a7ffd2c3eMartin Schwidefsky#define PGSTE_GR_BIT 0x00040000UL 3180d0dafc1e48fd254c22f75738def870a7ffd2c3eMartin Schwidefsky#define PGSTE_GC_BIT 0x00020000UL 3190a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky#define PGSTE_UC_BIT 0x00008000UL /* user dirty (migration) */ 3200a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky#define PGSTE_IN_BIT 0x00004000UL /* IPTE notify bit */ 3216c61cfe91be53b444abc1da2dbab14efa77706c0Martin Schwidefsky 322f4815ac6c935b8e441fe12504d62e0e8ff7f7ce5Heiko Carstens#else /* CONFIG_64BIT */ 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3243610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky/* Bits in the segment/region table address-space-control-element */ 3253610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _ASCE_ORIGIN ~0xfffUL/* segment table origin */ 3263610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _ASCE_PRIVATE_SPACE 0x100 /* private space control */ 3273610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _ASCE_ALT_EVENT 0x80 /* storage alteration event control */ 3283610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _ASCE_SPACE_SWITCH 0x40 /* space switch event */ 3293610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _ASCE_REAL_SPACE 0x20 /* real space control */ 3303610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _ASCE_TYPE_MASK 0x0c /* asce table type mask */ 3313610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _ASCE_TYPE_REGION1 0x0c /* region first table type */ 3323610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _ASCE_TYPE_REGION2 0x08 /* region second table type */ 3333610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _ASCE_TYPE_REGION3 0x04 /* region third table type */ 3343610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _ASCE_TYPE_SEGMENT 0x00 /* segment table type */ 3353610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _ASCE_TABLE_LENGTH 0x03 /* region table length */ 3363610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky 3373610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky/* Bits in the region table entry */ 3383610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _REGION_ENTRY_ORIGIN ~0xfffUL/* region/segment table origin */ 339e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define _REGION_ENTRY_PROTECT 0x200 /* region protection bit */ 340e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define _REGION_ENTRY_INVALID 0x20 /* invalid region table entry */ 3413610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _REGION_ENTRY_TYPE_MASK 0x0c /* region/segment table type mask */ 3423610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _REGION_ENTRY_TYPE_R1 0x0c /* region first table type */ 3433610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _REGION_ENTRY_TYPE_R2 0x08 /* region second table type */ 3443610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _REGION_ENTRY_TYPE_R3 0x04 /* region third table type */ 3453610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _REGION_ENTRY_LENGTH 0x03 /* region third length */ 3463610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky 3473610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _REGION1_ENTRY (_REGION_ENTRY_TYPE_R1 | _REGION_ENTRY_LENGTH) 348e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define _REGION1_ENTRY_EMPTY (_REGION_ENTRY_TYPE_R1 | _REGION_ENTRY_INVALID) 3493610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _REGION2_ENTRY (_REGION_ENTRY_TYPE_R2 | _REGION_ENTRY_LENGTH) 350e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define _REGION2_ENTRY_EMPTY (_REGION_ENTRY_TYPE_R2 | _REGION_ENTRY_INVALID) 3513610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _REGION3_ENTRY (_REGION_ENTRY_TYPE_R3 | _REGION_ENTRY_LENGTH) 352e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define _REGION3_ENTRY_EMPTY (_REGION_ENTRY_TYPE_R3 | _REGION_ENTRY_INVALID) 3533610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky 35418da236908793abccebc6f365fbe6e95a5b41db0Heiko Carstens#define _REGION3_ENTRY_LARGE 0x400 /* RTTE-format control, large page */ 3551819ed1f06ade476b701ff764e6cd84a36aee8deHeiko Carstens#define _REGION3_ENTRY_RO 0x200 /* page protection bit */ 35618da236908793abccebc6f365fbe6e95a5b41db0Heiko Carstens 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Bits in the segment table entry */ 3580944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky#define _SEGMENT_ENTRY_BITS 0xfffffffffffffe33UL 359152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky#define _SEGMENT_ENTRY_BITS_LARGE 0xfffffffffff0ff33UL 360ea81531de23cf92085e0601178fae920141caa5dHeiko Carstens#define _SEGMENT_ENTRY_ORIGIN_LARGE ~0xfffffUL /* large page address */ 3613610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _SEGMENT_ENTRY_ORIGIN ~0x7ffUL/* segment table origin */ 362e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define _SEGMENT_ENTRY_PROTECT 0x200 /* page protection bit */ 363e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define _SEGMENT_ENTRY_INVALID 0x20 /* invalid segment table entry */ 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3653610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _SEGMENT_ENTRY (0) 366e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define _SEGMENT_ENTRY_EMPTY (_SEGMENT_ENTRY_INVALID) 3673610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky 368152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky#define _SEGMENT_ENTRY_DIRTY 0x2000 /* SW segment dirty bit */ 369152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky#define _SEGMENT_ENTRY_YOUNG 0x1000 /* SW segment young bit */ 370152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky#define _SEGMENT_ENTRY_SPLIT 0x0800 /* THP splitting bit */ 371152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky#define _SEGMENT_ENTRY_LARGE 0x0400 /* STE-format control, large page */ 372152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky#define _SEGMENT_ENTRY_READ 0x0002 /* SW segment read bit */ 373152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky#define _SEGMENT_ENTRY_WRITE 0x0001 /* SW segment write bit */ 3740944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky 3750944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky/* 3760944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * Segment table entry encoding (R = read-only, I = invalid, y = young bit): 377152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky * dy..R...I...wr 378152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky * prot-none, clean, old 00..1...1...00 379152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky * prot-none, clean, young 01..1...1...00 380152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky * prot-none, dirty, old 10..1...1...00 381152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky * prot-none, dirty, young 11..1...1...00 382152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky * read-only, clean, old 00..1...1...01 383152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky * read-only, clean, young 01..1...0...01 384152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky * read-only, dirty, old 10..1...1...01 385152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky * read-only, dirty, young 11..1...0...01 386152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky * read-write, clean, old 00..1...1...11 387152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky * read-write, clean, young 01..1...0...11 388152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky * read-write, dirty, old 10..0...1...11 389152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky * read-write, dirty, young 11..0...0...11 3900944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * The segment table origin is used to distinguish empty (origin==0) from 3910944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * read-write, old segment table entries (origin!=0) 3920944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky */ 393e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky 394152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky#define _SEGMENT_ENTRY_SPLIT_BIT 11 /* THP splitting bit number */ 3951ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer 3966c61cfe91be53b444abc1da2dbab14efa77706c0Martin Schwidefsky/* Page status table bits for virtualization */ 3970d0dafc1e48fd254c22f75738def870a7ffd2c3eMartin Schwidefsky#define PGSTE_ACC_BITS 0xf000000000000000UL 3980d0dafc1e48fd254c22f75738def870a7ffd2c3eMartin Schwidefsky#define PGSTE_FP_BIT 0x0800000000000000UL 3990d0dafc1e48fd254c22f75738def870a7ffd2c3eMartin Schwidefsky#define PGSTE_PCL_BIT 0x0080000000000000UL 4000d0dafc1e48fd254c22f75738def870a7ffd2c3eMartin Schwidefsky#define PGSTE_HR_BIT 0x0040000000000000UL 4010d0dafc1e48fd254c22f75738def870a7ffd2c3eMartin Schwidefsky#define PGSTE_HC_BIT 0x0020000000000000UL 4020d0dafc1e48fd254c22f75738def870a7ffd2c3eMartin Schwidefsky#define PGSTE_GR_BIT 0x0004000000000000UL 4030d0dafc1e48fd254c22f75738def870a7ffd2c3eMartin Schwidefsky#define PGSTE_GC_BIT 0x0002000000000000UL 4040a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky#define PGSTE_UC_BIT 0x0000800000000000UL /* user dirty (migration) */ 4050a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky#define PGSTE_IN_BIT 0x0000400000000000UL /* IPTE notify bit */ 4066c61cfe91be53b444abc1da2dbab14efa77706c0Martin Schwidefsky 407f4815ac6c935b8e441fe12504d62e0e8ff7f7ce5Heiko Carstens#endif /* CONFIG_64BIT */ 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 409b31288fa83b2bcc8834e1e208e9526b8bd5ce361Konstantin Weitz/* Guest Page State used for virtualization */ 410b31288fa83b2bcc8834e1e208e9526b8bd5ce361Konstantin Weitz#define _PGSTE_GPS_ZERO 0x0000000080000000UL 411b31288fa83b2bcc8834e1e208e9526b8bd5ce361Konstantin Weitz#define _PGSTE_GPS_USAGE_MASK 0x0000000003000000UL 412b31288fa83b2bcc8834e1e208e9526b8bd5ce361Konstantin Weitz#define _PGSTE_GPS_USAGE_STABLE 0x0000000000000000UL 413b31288fa83b2bcc8834e1e208e9526b8bd5ce361Konstantin Weitz#define _PGSTE_GPS_USAGE_UNUSED 0x0000000001000000UL 414b31288fa83b2bcc8834e1e208e9526b8bd5ce361Konstantin Weitz 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 4163610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky * A user page table pointer has the space-switch-event bit, the 4173610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky * private-space-control bit and the storage-alteration-event-control 4183610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky * bit set. A kernel page table pointer doesn't need them. 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4203610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky#define _ASCE_USER_BITS (_ASCE_SPACE_SWITCH | _ASCE_PRIVATE_SPACE | \ 4213610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky _ASCE_ALT_EVENT) 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 4249282ed929758b82f448a40d3c17319d794970624Gerald Schaefer * Page protection definitions. 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 426e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_INVALID) 4270944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky#define PAGE_READ __pgprot(_PAGE_PRESENT | _PAGE_READ | \ 4280944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky _PAGE_INVALID | _PAGE_PROTECT) 4290944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky#define PAGE_WRITE __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \ 4300944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky _PAGE_INVALID | _PAGE_PROTECT) 4310944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky 4320944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \ 4330944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky _PAGE_YOUNG | _PAGE_DIRTY) 4340944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky#define PAGE_KERNEL __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \ 4350944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky _PAGE_YOUNG | _PAGE_DIRTY) 4360944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky#define PAGE_KERNEL_RO __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_YOUNG | \ 4370944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky _PAGE_PROTECT) 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 440043d07084b5347a26eab0a07aa13a4a929ad9e71Martin Schwidefsky * On s390 the page table entry has an invalid bit and a read-only bit. 441043d07084b5347a26eab0a07aa13a4a929ad9e71Martin Schwidefsky * Read permission implies execute permission and write permission 442043d07084b5347a26eab0a07aa13a4a929ad9e71Martin Schwidefsky * implies read permission. 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /*xwr*/ 4459282ed929758b82f448a40d3c17319d794970624Gerald Schaefer#define __P000 PAGE_NONE 446e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define __P001 PAGE_READ 447e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define __P010 PAGE_READ 448e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define __P011 PAGE_READ 449e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define __P100 PAGE_READ 450e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define __P101 PAGE_READ 451e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define __P110 PAGE_READ 452e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define __P111 PAGE_READ 4539282ed929758b82f448a40d3c17319d794970624Gerald Schaefer 4549282ed929758b82f448a40d3c17319d794970624Gerald Schaefer#define __S000 PAGE_NONE 455e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define __S001 PAGE_READ 456e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define __S010 PAGE_WRITE 457e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define __S011 PAGE_WRITE 458e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define __S100 PAGE_READ 459e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define __S101 PAGE_READ 460e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define __S110 PAGE_WRITE 461e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define __S111 PAGE_WRITE 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 463106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaefer/* 464106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaefer * Segment entry (large page) protection definitions. 465106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaefer */ 466e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky#define SEGMENT_NONE __pgprot(_SEGMENT_ENTRY_INVALID | \ 467e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky _SEGMENT_ENTRY_PROTECT) 468152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky#define SEGMENT_READ __pgprot(_SEGMENT_ENTRY_PROTECT | \ 469152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky _SEGMENT_ENTRY_READ) 470152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky#define SEGMENT_WRITE __pgprot(_SEGMENT_ENTRY_READ | \ 471152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky _SEGMENT_ENTRY_WRITE) 472106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaefer 473b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefskystatic inline int mm_has_pgste(struct mm_struct *mm) 474b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky{ 475b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky#ifdef CONFIG_PGSTE 476b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky if (unlikely(mm->context.has_pgste)) 477b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky return 1; 478b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky#endif 479b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky return 0; 480b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky} 48165eef33550f68e9a7f7d2dc64da94fb6cb85be2cDominik Dingel 48265eef33550f68e9a7f7d2dc64da94fb6cb85be2cDominik Dingelstatic inline int mm_use_skey(struct mm_struct *mm) 48365eef33550f68e9a7f7d2dc64da94fb6cb85be2cDominik Dingel{ 48465eef33550f68e9a7f7d2dc64da94fb6cb85be2cDominik Dingel#ifdef CONFIG_PGSTE 48565eef33550f68e9a7f7d2dc64da94fb6cb85be2cDominik Dingel if (mm->context.use_skey) 48665eef33550f68e9a7f7d2dc64da94fb6cb85be2cDominik Dingel return 1; 48765eef33550f68e9a7f7d2dc64da94fb6cb85be2cDominik Dingel#endif 48865eef33550f68e9a7f7d2dc64da94fb6cb85be2cDominik Dingel return 0; 48965eef33550f68e9a7f7d2dc64da94fb6cb85be2cDominik Dingel} 49065eef33550f68e9a7f7d2dc64da94fb6cb85be2cDominik Dingel 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * pgd/pmd/pte query functions 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 494f4815ac6c935b8e441fe12504d62e0e8ff7f7ce5Heiko Carstens#ifndef CONFIG_64BIT 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4964448aaf0faafff3f275d15937c28b6346760e028Adrian Bunkstatic inline int pgd_present(pgd_t pgd) { return 1; } 4974448aaf0faafff3f275d15937c28b6346760e028Adrian Bunkstatic inline int pgd_none(pgd_t pgd) { return 0; } 4984448aaf0faafff3f275d15937c28b6346760e028Adrian Bunkstatic inline int pgd_bad(pgd_t pgd) { return 0; } 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 500190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefskystatic inline int pud_present(pud_t pud) { return 1; } 501190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefskystatic inline int pud_none(pud_t pud) { return 0; } 50218da236908793abccebc6f365fbe6e95a5b41db0Heiko Carstensstatic inline int pud_large(pud_t pud) { return 0; } 503190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefskystatic inline int pud_bad(pud_t pud) { return 0; } 504190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky 505f4815ac6c935b8e441fe12504d62e0e8ff7f7ce5Heiko Carstens#else /* CONFIG_64BIT */ 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5075a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefskystatic inline int pgd_present(pgd_t pgd) 5085a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky{ 5096252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky if ((pgd_val(pgd) & _REGION_ENTRY_TYPE_MASK) < _REGION_ENTRY_TYPE_R2) 5106252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky return 1; 5115a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky return (pgd_val(pgd) & _REGION_ENTRY_ORIGIN) != 0UL; 5125a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky} 5135a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky 5145a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefskystatic inline int pgd_none(pgd_t pgd) 5155a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky{ 5166252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky if ((pgd_val(pgd) & _REGION_ENTRY_TYPE_MASK) < _REGION_ENTRY_TYPE_R2) 5176252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky return 0; 518e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky return (pgd_val(pgd) & _REGION_ENTRY_INVALID) != 0UL; 5195a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky} 5205a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky 5215a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefskystatic inline int pgd_bad(pgd_t pgd) 5225a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky{ 5236252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky /* 5246252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky * With dynamic page table levels the pgd can be a region table 5256252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky * entry or a segment table entry. Check for the bit that are 5266252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky * invalid for either table entry. 5276252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky */ 5285a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky unsigned long mask = 529e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky ~_SEGMENT_ENTRY_ORIGIN & ~_REGION_ENTRY_INVALID & 5305a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky ~_REGION_ENTRY_TYPE_MASK & ~_REGION_ENTRY_LENGTH; 5315a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky return (pgd_val(pgd) & mask) != 0; 5325a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky} 533190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky 534190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefskystatic inline int pud_present(pud_t pud) 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5366252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky if ((pud_val(pud) & _REGION_ENTRY_TYPE_MASK) < _REGION_ENTRY_TYPE_R3) 5376252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky return 1; 5380d01792300c4d7425eabac9095c603cdb411d2a5Martin Schwidefsky return (pud_val(pud) & _REGION_ENTRY_ORIGIN) != 0UL; 5391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 541190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefskystatic inline int pud_none(pud_t pud) 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5436252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky if ((pud_val(pud) & _REGION_ENTRY_TYPE_MASK) < _REGION_ENTRY_TYPE_R3) 5446252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky return 0; 545e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky return (pud_val(pud) & _REGION_ENTRY_INVALID) != 0UL; 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 54818da236908793abccebc6f365fbe6e95a5b41db0Heiko Carstensstatic inline int pud_large(pud_t pud) 54918da236908793abccebc6f365fbe6e95a5b41db0Heiko Carstens{ 55018da236908793abccebc6f365fbe6e95a5b41db0Heiko Carstens if ((pud_val(pud) & _REGION_ENTRY_TYPE_MASK) != _REGION_ENTRY_TYPE_R3) 55118da236908793abccebc6f365fbe6e95a5b41db0Heiko Carstens return 0; 55218da236908793abccebc6f365fbe6e95a5b41db0Heiko Carstens return !!(pud_val(pud) & _REGION3_ENTRY_LARGE); 55318da236908793abccebc6f365fbe6e95a5b41db0Heiko Carstens} 55418da236908793abccebc6f365fbe6e95a5b41db0Heiko Carstens 555190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefskystatic inline int pud_bad(pud_t pud) 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5576252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky /* 5586252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky * With dynamic page table levels the pud can be a region table 5596252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky * entry or a segment table entry. Check for the bit that are 5606252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky * invalid for either table entry. 5616252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky */ 5625a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky unsigned long mask = 563e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky ~_SEGMENT_ENTRY_ORIGIN & ~_REGION_ENTRY_INVALID & 5645a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky ~_REGION_ENTRY_TYPE_MASK & ~_REGION_ENTRY_LENGTH; 5655a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky return (pud_val(pud) & mask) != 0; 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 568f4815ac6c935b8e441fe12504d62e0e8ff7f7ce5Heiko Carstens#endif /* CONFIG_64BIT */ 5693610cce87af0693603db171d5b6f6735f5e3dc5bMartin Schwidefsky 5704448aaf0faafff3f275d15937c28b6346760e028Adrian Bunkstatic inline int pmd_present(pmd_t pmd) 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 572e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky return pmd_val(pmd) != _SEGMENT_ENTRY_INVALID; 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5754448aaf0faafff3f275d15937c28b6346760e028Adrian Bunkstatic inline int pmd_none(pmd_t pmd) 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 577e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky return pmd_val(pmd) == _SEGMENT_ENTRY_INVALID; 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 580378b1e7a80a59325ca1036e892462db728126f84Heiko Carstensstatic inline int pmd_large(pmd_t pmd) 581378b1e7a80a59325ca1036e892462db728126f84Heiko Carstens{ 582e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky return (pmd_val(pmd) & _SEGMENT_ENTRY_LARGE) != 0; 583378b1e7a80a59325ca1036e892462db728126f84Heiko Carstens} 584378b1e7a80a59325ca1036e892462db728126f84Heiko Carstens 585152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefskystatic inline int pmd_pfn(pmd_t pmd) 5860944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky{ 587152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky unsigned long origin_mask; 588152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky 589152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky origin_mask = _SEGMENT_ENTRY_ORIGIN; 590152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky if (pmd_large(pmd)) 591152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky origin_mask = _SEGMENT_ENTRY_ORIGIN_LARGE; 592152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky return (pmd_val(pmd) & origin_mask) >> PAGE_SHIFT; 5930944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky} 5940944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky 5954448aaf0faafff3f275d15937c28b6346760e028Adrian Bunkstatic inline int pmd_bad(pmd_t pmd) 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5970944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky if (pmd_large(pmd)) 5980944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky return (pmd_val(pmd) & ~_SEGMENT_ENTRY_BITS_LARGE) != 0; 5990944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky return (pmd_val(pmd) & ~_SEGMENT_ENTRY_BITS) != 0; 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 60275077afbec1ac89178c1542b23a70d0f960b0aafGerald Schaefer#define __HAVE_ARCH_PMDP_SPLITTING_FLUSH 60375077afbec1ac89178c1542b23a70d0f960b0aafGerald Schaeferextern void pmdp_splitting_flush(struct vm_area_struct *vma, 60475077afbec1ac89178c1542b23a70d0f960b0aafGerald Schaefer unsigned long addr, pmd_t *pmdp); 60575077afbec1ac89178c1542b23a70d0f960b0aafGerald Schaefer 6061ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer#define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS 6071ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaeferextern int pmdp_set_access_flags(struct vm_area_struct *vma, 6081ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer unsigned long address, pmd_t *pmdp, 6091ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer pmd_t entry, int dirty); 6101ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer 6111ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer#define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH 6121ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaeferextern int pmdp_clear_flush_young(struct vm_area_struct *vma, 6131ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer unsigned long address, pmd_t *pmdp); 6141ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer 6151ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer#define __HAVE_ARCH_PMD_WRITE 6161ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaeferstatic inline int pmd_write(pmd_t pmd) 6171ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer{ 618152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky return (pmd_val(pmd) & _SEGMENT_ENTRY_WRITE) != 0; 619152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky} 620152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky 621152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefskystatic inline int pmd_dirty(pmd_t pmd) 622152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky{ 623152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky int dirty = 1; 624152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky if (pmd_large(pmd)) 625152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky dirty = (pmd_val(pmd) & _SEGMENT_ENTRY_DIRTY) != 0; 626152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky return dirty; 6271ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer} 6281ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer 6291ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaeferstatic inline int pmd_young(pmd_t pmd) 6301ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer{ 631152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky int young = 1; 632152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky if (pmd_large(pmd)) 6330944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky young = (pmd_val(pmd) & _SEGMENT_ENTRY_YOUNG) != 0; 6340944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky return young; 6351ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer} 6361ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer 637e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefskystatic inline int pte_present(pte_t pte) 6381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 639e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky /* Bit pattern: (pte & 0x001) == 0x001 */ 640e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky return (pte_val(pte) & _PAGE_PRESENT) != 0; 6411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 643e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefskystatic inline int pte_none(pte_t pte) 6441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 645e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky /* Bit pattern: pte == 0x400 */ 646e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky return pte_val(pte) == _PAGE_INVALID; 6471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 649b31288fa83b2bcc8834e1e208e9526b8bd5ce361Konstantin Weitzstatic inline int pte_swap(pte_t pte) 650b31288fa83b2bcc8834e1e208e9526b8bd5ce361Konstantin Weitz{ 651b31288fa83b2bcc8834e1e208e9526b8bd5ce361Konstantin Weitz /* Bit pattern: (pte & 0x603) == 0x402 */ 652b31288fa83b2bcc8834e1e208e9526b8bd5ce361Konstantin Weitz return (pte_val(pte) & (_PAGE_INVALID | _PAGE_PROTECT | 653b31288fa83b2bcc8834e1e208e9526b8bd5ce361Konstantin Weitz _PAGE_TYPE | _PAGE_PRESENT)) 654b31288fa83b2bcc8834e1e208e9526b8bd5ce361Konstantin Weitz == (_PAGE_INVALID | _PAGE_TYPE); 655b31288fa83b2bcc8834e1e208e9526b8bd5ce361Konstantin Weitz} 656b31288fa83b2bcc8834e1e208e9526b8bd5ce361Konstantin Weitz 6574448aaf0faafff3f275d15937c28b6346760e028Adrian Bunkstatic inline int pte_file(pte_t pte) 6581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 659e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky /* Bit pattern: (pte & 0x601) == 0x600 */ 660e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky return (pte_val(pte) & (_PAGE_INVALID | _PAGE_PROTECT | _PAGE_PRESENT)) 661e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky == (_PAGE_INVALID | _PAGE_PROTECT); 6621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6647e675137a8e1a4d45822746456dd389b65745bf6Nick Pigginstatic inline int pte_special(pte_t pte) 6657e675137a8e1a4d45822746456dd389b65745bf6Nick Piggin{ 666a08cb629f546d1cecebe955392197f226e58dbe1Nick Piggin return (pte_val(pte) & _PAGE_SPECIAL); 6677e675137a8e1a4d45822746456dd389b65745bf6Nick Piggin} 6687e675137a8e1a4d45822746456dd389b65745bf6Nick Piggin 669ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky#define __HAVE_ARCH_PTE_SAME 670b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefskystatic inline int pte_same(pte_t a, pte_t b) 671b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky{ 672b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky return pte_val(a) == pte_val(b); 673b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky} 6741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 675b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefskystatic inline pgste_t pgste_get_lock(pte_t *ptep) 6765b7baf05783b1ac97a510243d7e82293416a7cf6Christian Borntraeger{ 677b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky unsigned long new = 0; 6785b7baf05783b1ac97a510243d7e82293416a7cf6Christian Borntraeger#ifdef CONFIG_PGSTE 679b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky unsigned long old; 680b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky 6815b7baf05783b1ac97a510243d7e82293416a7cf6Christian Borntraeger preempt_disable(); 682b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky asm( 683b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky " lg %0,%2\n" 684b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky "0: lgr %1,%0\n" 6850d0dafc1e48fd254c22f75738def870a7ffd2c3eMartin Schwidefsky " nihh %0,0xff7f\n" /* clear PCL bit in old */ 6860d0dafc1e48fd254c22f75738def870a7ffd2c3eMartin Schwidefsky " oihh %1,0x0080\n" /* set PCL bit in new */ 687b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky " csg %0,%1,%2\n" 688b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky " jl 0b\n" 689b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky : "=&d" (old), "=&d" (new), "=Q" (ptep[PTRS_PER_PTE]) 690a8f6e7f7953d1baa05a346bf7cee44f1d022c63dChristian Borntraeger : "Q" (ptep[PTRS_PER_PTE]) : "cc", "memory"); 6915b7baf05783b1ac97a510243d7e82293416a7cf6Christian Borntraeger#endif 692b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky return __pgste(new); 6935b7baf05783b1ac97a510243d7e82293416a7cf6Christian Borntraeger} 6945b7baf05783b1ac97a510243d7e82293416a7cf6Christian Borntraeger 695b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefskystatic inline void pgste_set_unlock(pte_t *ptep, pgste_t pgste) 6965b7baf05783b1ac97a510243d7e82293416a7cf6Christian Borntraeger{ 6975b7baf05783b1ac97a510243d7e82293416a7cf6Christian Borntraeger#ifdef CONFIG_PGSTE 698b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky asm( 6990d0dafc1e48fd254c22f75738def870a7ffd2c3eMartin Schwidefsky " nihh %1,0xff7f\n" /* clear PCL bit */ 700b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky " stg %1,%0\n" 701b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky : "=Q" (ptep[PTRS_PER_PTE]) 702a8f6e7f7953d1baa05a346bf7cee44f1d022c63dChristian Borntraeger : "d" (pgste_val(pgste)), "Q" (ptep[PTRS_PER_PTE]) 703a8f6e7f7953d1baa05a346bf7cee44f1d022c63dChristian Borntraeger : "cc", "memory"); 7045b7baf05783b1ac97a510243d7e82293416a7cf6Christian Borntraeger preempt_enable(); 7055b7baf05783b1ac97a510243d7e82293416a7cf6Christian Borntraeger#endif 7065b7baf05783b1ac97a510243d7e82293416a7cf6Christian Borntraeger} 7075b7baf05783b1ac97a510243d7e82293416a7cf6Christian Borntraeger 708d56c893d36678f7ec8552f22ec12793a82ff8ee6Martin Schwidefskystatic inline pgste_t pgste_get(pte_t *ptep) 709d56c893d36678f7ec8552f22ec12793a82ff8ee6Martin Schwidefsky{ 710d56c893d36678f7ec8552f22ec12793a82ff8ee6Martin Schwidefsky unsigned long pgste = 0; 711d56c893d36678f7ec8552f22ec12793a82ff8ee6Martin Schwidefsky#ifdef CONFIG_PGSTE 712d56c893d36678f7ec8552f22ec12793a82ff8ee6Martin Schwidefsky pgste = *(unsigned long *)(ptep + PTRS_PER_PTE); 713d56c893d36678f7ec8552f22ec12793a82ff8ee6Martin Schwidefsky#endif 714d56c893d36678f7ec8552f22ec12793a82ff8ee6Martin Schwidefsky return __pgste(pgste); 715d56c893d36678f7ec8552f22ec12793a82ff8ee6Martin Schwidefsky} 716d56c893d36678f7ec8552f22ec12793a82ff8ee6Martin Schwidefsky 7173a82603be4f5523ce21dd468a323aa36ff845f6dChristian Borntraegerstatic inline void pgste_set(pte_t *ptep, pgste_t pgste) 7183a82603be4f5523ce21dd468a323aa36ff845f6dChristian Borntraeger{ 7193a82603be4f5523ce21dd468a323aa36ff845f6dChristian Borntraeger#ifdef CONFIG_PGSTE 7203a82603be4f5523ce21dd468a323aa36ff845f6dChristian Borntraeger *(pgste_t *)(ptep + PTRS_PER_PTE) = pgste; 7213a82603be4f5523ce21dd468a323aa36ff845f6dChristian Borntraeger#endif 7223a82603be4f5523ce21dd468a323aa36ff845f6dChristian Borntraeger} 7233a82603be4f5523ce21dd468a323aa36ff845f6dChristian Borntraeger 72465eef33550f68e9a7f7d2dc64da94fb6cb85be2cDominik Dingelstatic inline pgste_t pgste_update_all(pte_t *ptep, pgste_t pgste, 72565eef33550f68e9a7f7d2dc64da94fb6cb85be2cDominik Dingel struct mm_struct *mm) 7265b7baf05783b1ac97a510243d7e82293416a7cf6Christian Borntraeger{ 7275b7baf05783b1ac97a510243d7e82293416a7cf6Christian Borntraeger#ifdef CONFIG_PGSTE 7280944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky unsigned long address, bits, skey; 729b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky 73065eef33550f68e9a7f7d2dc64da94fb6cb85be2cDominik Dingel if (!mm_use_skey(mm) || pte_val(*ptep) & _PAGE_INVALID) 73109b538833b85521d937a06faf61e6a3273253cc0Martin Schwidefsky return pgste; 732a43a9d93d40a69eceeb4e4a4c860cc20186d475cHeiko Carstens address = pte_val(*ptep) & PAGE_MASK; 7330944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky skey = (unsigned long) page_get_storage_key(address); 734b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky bits = skey & (_PAGE_CHANGED | _PAGE_REFERENCED); 735b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky /* Transfer page changed & referenced bit to guest bits in pgste */ 7360d0dafc1e48fd254c22f75738def870a7ffd2c3eMartin Schwidefsky pgste_val(pgste) |= bits << 48; /* GR bit & GC bit */ 737b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky /* Copy page access key and fetch protection bit to pgste */ 7380944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky pgste_val(pgste) &= ~(PGSTE_ACC_BITS | PGSTE_FP_BIT); 7390944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky pgste_val(pgste) |= (skey & (_PAGE_ACC_BITS | _PAGE_FP_BIT)) << 56; 740b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky#endif 741b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky return pgste; 742b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky 743b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky} 744b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky 74565eef33550f68e9a7f7d2dc64da94fb6cb85be2cDominik Dingelstatic inline void pgste_set_key(pte_t *ptep, pgste_t pgste, pte_t entry, 74665eef33550f68e9a7f7d2dc64da94fb6cb85be2cDominik Dingel struct mm_struct *mm) 747b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky{ 748b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky#ifdef CONFIG_PGSTE 749a43a9d93d40a69eceeb4e4a4c860cc20186d475cHeiko Carstens unsigned long address; 750338679f7ba4a81906b3fdfa6507824fdf704be80Christian Borntraeger unsigned long nkey; 751b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky 75265eef33550f68e9a7f7d2dc64da94fb6cb85be2cDominik Dingel if (!mm_use_skey(mm) || pte_val(entry) & _PAGE_INVALID) 75309b538833b85521d937a06faf61e6a3273253cc0Martin Schwidefsky return; 754338679f7ba4a81906b3fdfa6507824fdf704be80Christian Borntraeger VM_BUG_ON(!(pte_val(*ptep) & _PAGE_INVALID)); 75509b538833b85521d937a06faf61e6a3273253cc0Martin Schwidefsky address = pte_val(entry) & PAGE_MASK; 756338679f7ba4a81906b3fdfa6507824fdf704be80Christian Borntraeger /* 757338679f7ba4a81906b3fdfa6507824fdf704be80Christian Borntraeger * Set page access key and fetch protection bit from pgste. 758338679f7ba4a81906b3fdfa6507824fdf704be80Christian Borntraeger * The guest C/R information is still in the PGSTE, set real 759338679f7ba4a81906b3fdfa6507824fdf704be80Christian Borntraeger * key C/R to 0. 760338679f7ba4a81906b3fdfa6507824fdf704be80Christian Borntraeger */ 761fe489bf4505ae26d3c6d6a1f1d3064c2a9c5cd85Linus Torvalds nkey = (pgste_val(pgste) & (PGSTE_ACC_BITS | PGSTE_FP_BIT)) >> 56; 7620a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky nkey |= (pgste_val(pgste) & (PGSTE_GR_BIT | PGSTE_GC_BIT)) >> 48; 763338679f7ba4a81906b3fdfa6507824fdf704be80Christian Borntraeger page_set_storage_key(address, nkey, 0); 7645b7baf05783b1ac97a510243d7e82293416a7cf6Christian Borntraeger#endif 7655b7baf05783b1ac97a510243d7e82293416a7cf6Christian Borntraeger} 7665b7baf05783b1ac97a510243d7e82293416a7cf6Christian Borntraeger 7670a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefskystatic inline pgste_t pgste_set_pte(pte_t *ptep, pgste_t pgste, pte_t entry) 768abf09bed3cceadd809f0356065c2ada6cee90d4aMartin Schwidefsky{ 7690a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky if ((pte_val(entry) & _PAGE_PRESENT) && 7700a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky (pte_val(entry) & _PAGE_WRITE) && 7710a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky !(pte_val(entry) & _PAGE_INVALID)) { 7720a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky if (!MACHINE_HAS_ESOP) { 7730a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky /* 7740a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky * Without enhanced suppression-on-protection force 7750a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky * the dirty bit on for all writable ptes. 7760a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky */ 7770a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky pte_val(entry) |= _PAGE_DIRTY; 7780a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky pte_val(entry) &= ~_PAGE_PROTECT; 7790a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky } 7800a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky if (!(pte_val(entry) & _PAGE_PROTECT)) 7810a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky /* This pte allows write access, set user-dirty */ 7820a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky pgste_val(pgste) |= PGSTE_UC_BIT; 783abf09bed3cceadd809f0356065c2ada6cee90d4aMartin Schwidefsky } 784abf09bed3cceadd809f0356065c2ada6cee90d4aMartin Schwidefsky *ptep = entry; 7850a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky return pgste; 786abf09bed3cceadd809f0356065c2ada6cee90d4aMartin Schwidefsky} 787abf09bed3cceadd809f0356065c2ada6cee90d4aMartin Schwidefsky 788e5992f2e6c3829cd43dbc4438ee13dcd6506f7f3Martin Schwidefsky/** 789e5992f2e6c3829cd43dbc4438ee13dcd6506f7f3Martin Schwidefsky * struct gmap_struct - guest address space 790527e30b41d8b86e9ae7f5b740de416958c0e574eMartin Schwidefsky * @crst_list: list of all crst tables used in the guest address space 791e5992f2e6c3829cd43dbc4438ee13dcd6506f7f3Martin Schwidefsky * @mm: pointer to the parent mm_struct 792527e30b41d8b86e9ae7f5b740de416958c0e574eMartin Schwidefsky * @guest_to_host: radix tree with guest to host address translation 793527e30b41d8b86e9ae7f5b740de416958c0e574eMartin Schwidefsky * @host_to_guest: radix tree with pointer to segment table entries 794527e30b41d8b86e9ae7f5b740de416958c0e574eMartin Schwidefsky * @guest_table_lock: spinlock to protect all entries in the guest page table 795e5992f2e6c3829cd43dbc4438ee13dcd6506f7f3Martin Schwidefsky * @table: pointer to the page directory 796480e5926ce3bb61ec229be2dab08bdce8abb8d2eChristian Borntraeger * @asce: address space control element for gmap page table 79724eb3a824c4f3ccfaa2305dc1d9d9e2a708828c5Dominik Dingel * @pfault_enabled: defines if pfaults are applicable for the guest 798e5992f2e6c3829cd43dbc4438ee13dcd6506f7f3Martin Schwidefsky */ 799e5992f2e6c3829cd43dbc4438ee13dcd6506f7f3Martin Schwidefskystruct gmap { 800e5992f2e6c3829cd43dbc4438ee13dcd6506f7f3Martin Schwidefsky struct list_head list; 801527e30b41d8b86e9ae7f5b740de416958c0e574eMartin Schwidefsky struct list_head crst_list; 802e5992f2e6c3829cd43dbc4438ee13dcd6506f7f3Martin Schwidefsky struct mm_struct *mm; 803527e30b41d8b86e9ae7f5b740de416958c0e574eMartin Schwidefsky struct radix_tree_root guest_to_host; 804527e30b41d8b86e9ae7f5b740de416958c0e574eMartin Schwidefsky struct radix_tree_root host_to_guest; 805527e30b41d8b86e9ae7f5b740de416958c0e574eMartin Schwidefsky spinlock_t guest_table_lock; 806e5992f2e6c3829cd43dbc4438ee13dcd6506f7f3Martin Schwidefsky unsigned long *table; 807480e5926ce3bb61ec229be2dab08bdce8abb8d2eChristian Borntraeger unsigned long asce; 808c6c956b80bdf151cf41d3e7e5c54755d930a212cMartin Schwidefsky unsigned long asce_end; 8092c70fe4416d5f6d092b20ebf7d7654835e09c109Christian Borntraeger void *private; 81024eb3a824c4f3ccfaa2305dc1d9d9e2a708828c5Dominik Dingel bool pfault_enabled; 811e5992f2e6c3829cd43dbc4438ee13dcd6506f7f3Martin Schwidefsky}; 812e5992f2e6c3829cd43dbc4438ee13dcd6506f7f3Martin Schwidefsky 813e5992f2e6c3829cd43dbc4438ee13dcd6506f7f3Martin Schwidefsky/** 814d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky * struct gmap_notifier - notify function block for page invalidation 815d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky * @notifier_call: address of callback function 816d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky */ 817d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefskystruct gmap_notifier { 818d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky struct list_head list; 8196e0a0431bf7d90ed0b8a0a974ad219617a70cc22Martin Schwidefsky void (*notifier_call)(struct gmap *gmap, unsigned long gaddr); 820d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky}; 821d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky 822c6c956b80bdf151cf41d3e7e5c54755d930a212cMartin Schwidefskystruct gmap *gmap_alloc(struct mm_struct *mm, unsigned long limit); 823e5992f2e6c3829cd43dbc4438ee13dcd6506f7f3Martin Schwidefskyvoid gmap_free(struct gmap *gmap); 824e5992f2e6c3829cd43dbc4438ee13dcd6506f7f3Martin Schwidefskyvoid gmap_enable(struct gmap *gmap); 825e5992f2e6c3829cd43dbc4438ee13dcd6506f7f3Martin Schwidefskyvoid gmap_disable(struct gmap *gmap); 826e5992f2e6c3829cd43dbc4438ee13dcd6506f7f3Martin Schwidefskyint gmap_map_segment(struct gmap *gmap, unsigned long from, 827d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky unsigned long to, unsigned long len); 828e5992f2e6c3829cd43dbc4438ee13dcd6506f7f3Martin Schwidefskyint gmap_unmap_segment(struct gmap *gmap, unsigned long to, unsigned long len); 8296e0a0431bf7d90ed0b8a0a974ad219617a70cc22Martin Schwidefskyunsigned long __gmap_translate(struct gmap *, unsigned long gaddr); 8306e0a0431bf7d90ed0b8a0a974ad219617a70cc22Martin Schwidefskyunsigned long gmap_translate(struct gmap *, unsigned long gaddr); 831527e30b41d8b86e9ae7f5b740de416958c0e574eMartin Schwidefskyint __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr); 832527e30b41d8b86e9ae7f5b740de416958c0e574eMartin Schwidefskyint gmap_fault(struct gmap *, unsigned long gaddr, unsigned int fault_flags); 8336e0a0431bf7d90ed0b8a0a974ad219617a70cc22Martin Schwidefskyvoid gmap_discard(struct gmap *, unsigned long from, unsigned long to); 8346e0a0431bf7d90ed0b8a0a974ad219617a70cc22Martin Schwidefskyvoid __gmap_zap(struct gmap *, unsigned long gaddr); 835a0bf4f149bbfa2e31b5f4172c817afdb7b986733Dominik Dingelbool gmap_test_and_clear_dirty(unsigned long address, struct gmap *); 836a0bf4f149bbfa2e31b5f4172c817afdb7b986733Dominik Dingel 837e5992f2e6c3829cd43dbc4438ee13dcd6506f7f3Martin Schwidefsky 838d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefskyvoid gmap_register_ipte_notifier(struct gmap_notifier *); 839d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefskyvoid gmap_unregister_ipte_notifier(struct gmap_notifier *); 840d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefskyint gmap_ipte_notify(struct gmap *, unsigned long start, unsigned long len); 8419da4e3807657f3bcd12cfbb5671d80794303dde2Martin Schwidefskyvoid gmap_do_ipte_notify(struct mm_struct *, unsigned long addr, pte_t *); 842d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky 843d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefskystatic inline pgste_t pgste_ipte_notify(struct mm_struct *mm, 84455dbbdd9a832b3c0546a65df155d9e6eee8c312eMartin Schwidefsky unsigned long addr, 845d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky pte_t *ptep, pgste_t pgste) 846d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky{ 847d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky#ifdef CONFIG_PGSTE 8480d0dafc1e48fd254c22f75738def870a7ffd2c3eMartin Schwidefsky if (pgste_val(pgste) & PGSTE_IN_BIT) { 8490d0dafc1e48fd254c22f75738def870a7ffd2c3eMartin Schwidefsky pgste_val(pgste) &= ~PGSTE_IN_BIT; 8509da4e3807657f3bcd12cfbb5671d80794303dde2Martin Schwidefsky gmap_do_ipte_notify(mm, addr, ptep); 851d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky } 852d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky#endif 853d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky return pgste; 854d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky} 855d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 857b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky * Certain architectures need to do special things when PTEs 858b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky * within a page table are directly modified. Thus, the following 859b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky * hook is made available. 860b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky */ 861b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefskystatic inline void set_pte_at(struct mm_struct *mm, unsigned long addr, 862b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pte_t *ptep, pte_t entry) 863b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky{ 864b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pgste_t pgste; 865b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky 866b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky if (mm_has_pgste(mm)) { 867b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pgste = pgste_get_lock(ptep); 868b31288fa83b2bcc8834e1e208e9526b8bd5ce361Konstantin Weitz pgste_val(pgste) &= ~_PGSTE_GPS_ZERO; 86965eef33550f68e9a7f7d2dc64da94fb6cb85be2cDominik Dingel pgste_set_key(ptep, pgste, entry, mm); 8700a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky pgste = pgste_set_pte(ptep, pgste, entry); 871b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pgste_set_unlock(ptep, pgste); 872abf09bed3cceadd809f0356065c2ada6cee90d4aMartin Schwidefsky } else { 873b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky *ptep = entry; 874abf09bed3cceadd809f0356065c2ada6cee90d4aMartin Schwidefsky } 875b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky} 876b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky 877b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky/* 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * query functions pte_write/pte_dirty/pte_young only work if 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * pte_present() is true. Undefined behaviour if not.. 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8814448aaf0faafff3f275d15937c28b6346760e028Adrian Bunkstatic inline int pte_write(pte_t pte) 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 883e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky return (pte_val(pte) & _PAGE_WRITE) != 0; 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8864448aaf0faafff3f275d15937c28b6346760e028Adrian Bunkstatic inline int pte_dirty(pte_t pte) 8871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 888e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky return (pte_val(pte) & _PAGE_DIRTY) != 0; 8891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8914448aaf0faafff3f275d15937c28b6346760e028Adrian Bunkstatic inline int pte_young(pte_t pte) 8921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8930944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky return (pte_val(pte) & _PAGE_YOUNG) != 0; 8941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 896b31288fa83b2bcc8834e1e208e9526b8bd5ce361Konstantin Weitz#define __HAVE_ARCH_PTE_UNUSED 897b31288fa83b2bcc8834e1e208e9526b8bd5ce361Konstantin Weitzstatic inline int pte_unused(pte_t pte) 898b31288fa83b2bcc8834e1e208e9526b8bd5ce361Konstantin Weitz{ 899b31288fa83b2bcc8834e1e208e9526b8bd5ce361Konstantin Weitz return pte_val(pte) & _PAGE_UNUSED; 900b31288fa83b2bcc8834e1e208e9526b8bd5ce361Konstantin Weitz} 901b31288fa83b2bcc8834e1e208e9526b8bd5ce361Konstantin Weitz 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * pgd/pmd/pte modification functions 9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 906b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefskystatic inline void pgd_clear(pgd_t *pgd) 9075a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky{ 908f4815ac6c935b8e441fe12504d62e0e8ff7f7ce5Heiko Carstens#ifdef CONFIG_64BIT 9096252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky if ((pgd_val(*pgd) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R2) 9106252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky pgd_val(*pgd) = _REGION2_ENTRY_EMPTY; 911b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky#endif 9125a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky} 9135a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky 914b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefskystatic inline void pud_clear(pud_t *pud) 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 916f4815ac6c935b8e441fe12504d62e0e8ff7f7ce5Heiko Carstens#ifdef CONFIG_64BIT 9176252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky if ((pud_val(*pud) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R3) 9186252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky pud_val(*pud) = _REGION3_ENTRY_EMPTY; 919b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky#endif 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 922b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefskystatic inline void pmd_clear(pmd_t *pmdp) 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 924e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky pmd_val(*pmdp) = _SEGMENT_ENTRY_INVALID; 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9274448aaf0faafff3f275d15937c28b6346760e028Adrian Bunkstatic inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) 9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 929e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky pte_val(*ptep) = _PAGE_INVALID; 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The following pte modification functions only work if 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * pte_present() is true. Undefined behaviour if not.. 9351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9364448aaf0faafff3f275d15937c28b6346760e028Adrian Bunkstatic inline pte_t pte_modify(pte_t pte, pgprot_t newprot) 9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 938138c9021ca68d6f8a6fac3418995fee102a3cc22Nick Piggin pte_val(pte) &= _PAGE_CHG_MASK; 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pte_val(pte) |= pgprot_val(newprot); 9400944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky /* 9410944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * newprot for PAGE_NONE, PAGE_READ and PAGE_WRITE has the 9420944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * invalid bit set, clear it again for readable, young pages 9430944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky */ 9440944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky if ((pte_val(pte) & _PAGE_YOUNG) && (pte_val(pte) & _PAGE_READ)) 9450944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky pte_val(pte) &= ~_PAGE_INVALID; 9460944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky /* 9470944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * newprot for PAGE_READ and PAGE_WRITE has the page protection 9480944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky * bit set, clear it again for writable, dirty pages 9490944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky */ 950e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky if ((pte_val(pte) & _PAGE_DIRTY) && (pte_val(pte) & _PAGE_WRITE)) 951e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky pte_val(pte) &= ~_PAGE_PROTECT; 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return pte; 9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9554448aaf0faafff3f275d15937c28b6346760e028Adrian Bunkstatic inline pte_t pte_wrprotect(pte_t pte) 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 957e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky pte_val(pte) &= ~_PAGE_WRITE; 958e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky pte_val(pte) |= _PAGE_PROTECT; 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return pte; 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9624448aaf0faafff3f275d15937c28b6346760e028Adrian Bunkstatic inline pte_t pte_mkwrite(pte_t pte) 9631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 964e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky pte_val(pte) |= _PAGE_WRITE; 965e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky if (pte_val(pte) & _PAGE_DIRTY) 966e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky pte_val(pte) &= ~_PAGE_PROTECT; 9671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return pte; 9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9704448aaf0faafff3f275d15937c28b6346760e028Adrian Bunkstatic inline pte_t pte_mkclean(pte_t pte) 9711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 972e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky pte_val(pte) &= ~_PAGE_DIRTY; 973e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky pte_val(pte) |= _PAGE_PROTECT; 9741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return pte; 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9774448aaf0faafff3f275d15937c28b6346760e028Adrian Bunkstatic inline pte_t pte_mkdirty(pte_t pte) 9781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 979e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky pte_val(pte) |= _PAGE_DIRTY; 980e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky if (pte_val(pte) & _PAGE_WRITE) 981e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky pte_val(pte) &= ~_PAGE_PROTECT; 9821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return pte; 9831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9854448aaf0faafff3f275d15937c28b6346760e028Adrian Bunkstatic inline pte_t pte_mkold(pte_t pte) 9861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 987e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky pte_val(pte) &= ~_PAGE_YOUNG; 9880944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky pte_val(pte) |= _PAGE_INVALID; 9891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return pte; 9901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9924448aaf0faafff3f275d15937c28b6346760e028Adrian Bunkstatic inline pte_t pte_mkyoung(pte_t pte) 9931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9940944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky pte_val(pte) |= _PAGE_YOUNG; 9950944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky if (pte_val(pte) & _PAGE_READ) 9960944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky pte_val(pte) &= ~_PAGE_INVALID; 9971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return pte; 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10007e675137a8e1a4d45822746456dd389b65745bf6Nick Pigginstatic inline pte_t pte_mkspecial(pte_t pte) 10017e675137a8e1a4d45822746456dd389b65745bf6Nick Piggin{ 1002a08cb629f546d1cecebe955392197f226e58dbe1Nick Piggin pte_val(pte) |= _PAGE_SPECIAL; 10037e675137a8e1a4d45822746456dd389b65745bf6Nick Piggin return pte; 10047e675137a8e1a4d45822746456dd389b65745bf6Nick Piggin} 10057e675137a8e1a4d45822746456dd389b65745bf6Nick Piggin 100684afdcee620b1640f2a145c07febae4ed68947f9Heiko Carstens#ifdef CONFIG_HUGETLB_PAGE 100784afdcee620b1640f2a145c07febae4ed68947f9Heiko Carstensstatic inline pte_t pte_mkhuge(pte_t pte) 100884afdcee620b1640f2a145c07febae4ed68947f9Heiko Carstens{ 1009e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky pte_val(pte) |= _PAGE_LARGE; 101084afdcee620b1640f2a145c07febae4ed68947f9Heiko Carstens return pte; 101184afdcee620b1640f2a145c07febae4ed68947f9Heiko Carstens} 101284afdcee620b1640f2a145c07febae4ed68947f9Heiko Carstens#endif 101384afdcee620b1640f2a145c07febae4ed68947f9Heiko Carstens 10149282ed929758b82f448a40d3c17319d794970624Gerald Schaeferstatic inline void __ptep_ipte(unsigned long address, pte_t *ptep) 10151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 101653e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky unsigned long pto = (unsigned long) ptep; 101753e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky 1018f4815ac6c935b8e441fe12504d62e0e8ff7f7ce5Heiko Carstens#ifndef CONFIG_64BIT 101953e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky /* pto in ESA mode must point to the start of the segment table */ 102053e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky pto &= 0x7ffffc00; 10219282ed929758b82f448a40d3c17319d794970624Gerald Schaefer#endif 102253e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky /* Invalidation + global TLB flush for the pte */ 102353e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky asm volatile( 102453e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky " ipte %2,%3" 102553e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky : "=m" (*ptep) : "m" (*ptep), "a" (pto), "a" (address)); 102653e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky} 102753e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky 10281b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefskystatic inline void __ptep_ipte_local(unsigned long address, pte_t *ptep) 10291b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky{ 10301b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky unsigned long pto = (unsigned long) ptep; 10311b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky 10321b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky#ifndef CONFIG_64BIT 10331b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky /* pto in ESA mode must point to the start of the segment table */ 10341b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky pto &= 0x7ffffc00; 10351b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky#endif 10361b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky /* Invalidation + local TLB flush for the pte */ 10371b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky asm volatile( 10381b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky " .insn rrf,0xb2210000,%2,%3,0,1" 10391b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky : "=m" (*ptep) : "m" (*ptep), "a" (pto), "a" (address)); 10401b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky} 10411b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky 1042cfb0b24143b4f587ff3e3bd829f9f471285d097bHeiko Carstensstatic inline void __ptep_ipte_range(unsigned long address, int nr, pte_t *ptep) 1043cfb0b24143b4f587ff3e3bd829f9f471285d097bHeiko Carstens{ 1044cfb0b24143b4f587ff3e3bd829f9f471285d097bHeiko Carstens unsigned long pto = (unsigned long) ptep; 1045cfb0b24143b4f587ff3e3bd829f9f471285d097bHeiko Carstens 1046cfb0b24143b4f587ff3e3bd829f9f471285d097bHeiko Carstens#ifndef CONFIG_64BIT 1047cfb0b24143b4f587ff3e3bd829f9f471285d097bHeiko Carstens /* pto in ESA mode must point to the start of the segment table */ 1048cfb0b24143b4f587ff3e3bd829f9f471285d097bHeiko Carstens pto &= 0x7ffffc00; 1049cfb0b24143b4f587ff3e3bd829f9f471285d097bHeiko Carstens#endif 1050cfb0b24143b4f587ff3e3bd829f9f471285d097bHeiko Carstens /* Invalidate a range of ptes + global TLB flush of the ptes */ 1051cfb0b24143b4f587ff3e3bd829f9f471285d097bHeiko Carstens do { 1052cfb0b24143b4f587ff3e3bd829f9f471285d097bHeiko Carstens asm volatile( 1053cfb0b24143b4f587ff3e3bd829f9f471285d097bHeiko Carstens " .insn rrf,0xb2210000,%2,%0,%1,0" 1054cfb0b24143b4f587ff3e3bd829f9f471285d097bHeiko Carstens : "+a" (address), "+a" (nr) : "a" (pto) : "memory"); 1055cfb0b24143b4f587ff3e3bd829f9f471285d097bHeiko Carstens } while (nr != 255); 1056cfb0b24143b4f587ff3e3bd829f9f471285d097bHeiko Carstens} 1057cfb0b24143b4f587ff3e3bd829f9f471285d097bHeiko Carstens 105853e857f30867918b3618d8e18902e63291946ef4Martin Schwidefskystatic inline void ptep_flush_direct(struct mm_struct *mm, 105953e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky unsigned long address, pte_t *ptep) 106053e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky{ 10611b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky int active, count; 10621b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky 106353e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky if (pte_val(*ptep) & _PAGE_INVALID) 106453e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky return; 10651b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky active = (mm == current->active_mm) ? 1 : 0; 10661b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky count = atomic_add_return(0x10000, &mm->context.attach_count); 10671b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky if (MACHINE_HAS_TLB_LC && (count & 0xffff) <= active && 10681b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky cpumask_equal(mm_cpumask(mm), cpumask_of(smp_processor_id()))) 10691b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky __ptep_ipte_local(address, ptep); 10701b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky else 10711b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky __ptep_ipte(address, ptep); 10721b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky atomic_sub(0x10000, &mm->context.attach_count); 10739282ed929758b82f448a40d3c17319d794970624Gerald Schaefer} 10749282ed929758b82f448a40d3c17319d794970624Gerald Schaefer 10755c474a1e2265c5156e6c63f87a7e99053039b8b9Martin Schwidefskystatic inline void ptep_flush_lazy(struct mm_struct *mm, 10765c474a1e2265c5156e6c63f87a7e99053039b8b9Martin Schwidefsky unsigned long address, pte_t *ptep) 10775c474a1e2265c5156e6c63f87a7e99053039b8b9Martin Schwidefsky{ 107853e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky int active, count; 10795c474a1e2265c5156e6c63f87a7e99053039b8b9Martin Schwidefsky 108053e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky if (pte_val(*ptep) & _PAGE_INVALID) 108153e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky return; 108253e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky active = (mm == current->active_mm) ? 1 : 0; 108353e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky count = atomic_add_return(0x10000, &mm->context.attach_count); 108453e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky if ((count & 0xffff) <= active) { 108553e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky pte_val(*ptep) |= _PAGE_INVALID; 10865c474a1e2265c5156e6c63f87a7e99053039b8b9Martin Schwidefsky mm->context.flush_mm = 1; 108753e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky } else 108853e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky __ptep_ipte(address, ptep); 108953e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky atomic_sub(0x10000, &mm->context.attach_count); 10905c474a1e2265c5156e6c63f87a7e99053039b8b9Martin Schwidefsky} 10915c474a1e2265c5156e6c63f87a7e99053039b8b9Martin Schwidefsky 10920a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky/* 10930a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky * Get (and clear) the user dirty bit for a pte. 10940a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky */ 10950a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefskystatic inline int ptep_test_and_clear_user_dirty(struct mm_struct *mm, 10960a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky unsigned long addr, 10970a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky pte_t *ptep) 10980a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky{ 10990a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky pgste_t pgste; 11000a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky pte_t pte; 11010a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky int dirty; 11020a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky 11030a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky if (!mm_has_pgste(mm)) 11040a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky return 0; 11050a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky pgste = pgste_get_lock(ptep); 11060a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky dirty = !!(pgste_val(pgste) & PGSTE_UC_BIT); 11070a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky pgste_val(pgste) &= ~PGSTE_UC_BIT; 11080a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky pte = *ptep; 11090a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky if (dirty && (pte_val(pte) & _PAGE_PRESENT)) { 111055dbbdd9a832b3c0546a65df155d9e6eee8c312eMartin Schwidefsky pgste = pgste_ipte_notify(mm, addr, ptep, pgste); 11110a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky __ptep_ipte(addr, ptep); 11120a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky if (MACHINE_HAS_ESOP || !(pte_val(pte) & _PAGE_WRITE)) 11130a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky pte_val(pte) |= _PAGE_PROTECT; 11140a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky else 11150a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky pte_val(pte) |= _PAGE_INVALID; 11160a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky *ptep = pte; 11170a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky } 11180a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky pgste_set_unlock(ptep, pgste); 11190a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky return dirty; 11200a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky} 11210a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky 11220944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG 11230944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefskystatic inline int ptep_test_and_clear_young(struct vm_area_struct *vma, 11240944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky unsigned long addr, pte_t *ptep) 11250944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky{ 11260944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky pgste_t pgste; 11273e03d4c46daa849880837d802e41c14132a03ef9Christian Borntraeger pte_t pte, oldpte; 11280944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky int young; 11290944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky 11300944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky if (mm_has_pgste(vma->vm_mm)) { 11310944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky pgste = pgste_get_lock(ptep); 113255dbbdd9a832b3c0546a65df155d9e6eee8c312eMartin Schwidefsky pgste = pgste_ipte_notify(vma->vm_mm, addr, ptep, pgste); 11330944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky } 11340944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky 11353e03d4c46daa849880837d802e41c14132a03ef9Christian Borntraeger oldpte = pte = *ptep; 113653e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky ptep_flush_direct(vma->vm_mm, addr, ptep); 11370944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky young = pte_young(pte); 11380944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky pte = pte_mkold(pte); 11390944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky 11400944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky if (mm_has_pgste(vma->vm_mm)) { 11413e03d4c46daa849880837d802e41c14132a03ef9Christian Borntraeger pgste = pgste_update_all(&oldpte, pgste, vma->vm_mm); 11420a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky pgste = pgste_set_pte(ptep, pgste, pte); 11430944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky pgste_set_unlock(ptep, pgste); 11440944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky } else 11450944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky *ptep = pte; 11460944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky 11470944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky return young; 11480944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky} 11490944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky 11500944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH 11510944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefskystatic inline int ptep_clear_flush_young(struct vm_area_struct *vma, 11520944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky unsigned long address, pte_t *ptep) 11530944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky{ 11540944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky return ptep_test_and_clear_young(vma, address, ptep); 11550944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky} 11560944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky 1157ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky/* 1158ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky * This is hard to understand. ptep_get_and_clear and ptep_clear_flush 1159ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky * both clear the TLB for the unmapped pte. The reason is that 1160ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky * ptep_get_and_clear is used in common code (e.g. change_pte_range) 1161ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky * to modify an active pte. The sequence is 1162ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky * 1) ptep_get_and_clear 1163ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky * 2) set_pte_at 1164ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky * 3) flush_tlb_range 1165ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky * On s390 the tlb needs to get flushed with the modification of the pte 1166ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky * if the pte is active. The only way how this can be implemented is to 1167ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky * have ptep_get_and_clear do the tlb flush. In exchange flush_tlb_range 1168ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky * is a nop. 1169ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky */ 1170ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky#define __HAVE_ARCH_PTEP_GET_AND_CLEAR 1171b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefskystatic inline pte_t ptep_get_and_clear(struct mm_struct *mm, 1172b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky unsigned long address, pte_t *ptep) 1173b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky{ 1174b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pgste_t pgste; 1175b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pte_t pte; 1176b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky 1177d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky if (mm_has_pgste(mm)) { 1178b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pgste = pgste_get_lock(ptep); 117955dbbdd9a832b3c0546a65df155d9e6eee8c312eMartin Schwidefsky pgste = pgste_ipte_notify(mm, address, ptep, pgste); 1180d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky } 1181b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky 1182b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pte = *ptep; 11835c474a1e2265c5156e6c63f87a7e99053039b8b9Martin Schwidefsky ptep_flush_lazy(mm, address, ptep); 1184e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky pte_val(*ptep) = _PAGE_INVALID; 1185b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky 1186b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky if (mm_has_pgste(mm)) { 118765eef33550f68e9a7f7d2dc64da94fb6cb85be2cDominik Dingel pgste = pgste_update_all(&pte, pgste, mm); 1188b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pgste_set_unlock(ptep, pgste); 1189b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky } 1190b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky return pte; 1191b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky} 1192b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky 1193b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky#define __HAVE_ARCH_PTEP_MODIFY_PROT_TRANSACTION 1194b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefskystatic inline pte_t ptep_modify_prot_start(struct mm_struct *mm, 1195b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky unsigned long address, 1196b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pte_t *ptep) 1197b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky{ 1198d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky pgste_t pgste; 1199b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pte_t pte; 1200b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky 1201d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky if (mm_has_pgste(mm)) { 1202d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky pgste = pgste_get_lock(ptep); 120355dbbdd9a832b3c0546a65df155d9e6eee8c312eMartin Schwidefsky pgste_ipte_notify(mm, address, ptep, pgste); 1204d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky } 1205b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky 1206b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pte = *ptep; 12075c474a1e2265c5156e6c63f87a7e99053039b8b9Martin Schwidefsky ptep_flush_lazy(mm, address, ptep); 1208b56433cb782d1cc7e44fc46d2ce3917fa75d2236Christian Borntraeger 12093a82603be4f5523ce21dd468a323aa36ff845f6dChristian Borntraeger if (mm_has_pgste(mm)) { 121065eef33550f68e9a7f7d2dc64da94fb6cb85be2cDominik Dingel pgste = pgste_update_all(&pte, pgste, mm); 12113a82603be4f5523ce21dd468a323aa36ff845f6dChristian Borntraeger pgste_set(ptep, pgste); 12123a82603be4f5523ce21dd468a323aa36ff845f6dChristian Borntraeger } 1213b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky return pte; 1214b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky} 1215b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky 1216b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefskystatic inline void ptep_modify_prot_commit(struct mm_struct *mm, 1217b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky unsigned long address, 1218b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pte_t *ptep, pte_t pte) 1219b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky{ 1220b56433cb782d1cc7e44fc46d2ce3917fa75d2236Christian Borntraeger pgste_t pgste; 1221b56433cb782d1cc7e44fc46d2ce3917fa75d2236Christian Borntraeger 1222abf09bed3cceadd809f0356065c2ada6cee90d4aMartin Schwidefsky if (mm_has_pgste(mm)) { 1223d56c893d36678f7ec8552f22ec12793a82ff8ee6Martin Schwidefsky pgste = pgste_get(ptep); 122465eef33550f68e9a7f7d2dc64da94fb6cb85be2cDominik Dingel pgste_set_key(ptep, pgste, pte, mm); 12250a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky pgste = pgste_set_pte(ptep, pgste, pte); 1226b56433cb782d1cc7e44fc46d2ce3917fa75d2236Christian Borntraeger pgste_set_unlock(ptep, pgste); 1227abf09bed3cceadd809f0356065c2ada6cee90d4aMartin Schwidefsky } else 1228abf09bed3cceadd809f0356065c2ada6cee90d4aMartin Schwidefsky *ptep = pte; 1229b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky} 1230ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky 1231ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky#define __HAVE_ARCH_PTEP_CLEAR_FLUSH 1232f0e47c229b489e37ba7e4159ef7f9cf9ccd44e19Martin Schwidefskystatic inline pte_t ptep_clear_flush(struct vm_area_struct *vma, 1233f0e47c229b489e37ba7e4159ef7f9cf9ccd44e19Martin Schwidefsky unsigned long address, pte_t *ptep) 1234f0e47c229b489e37ba7e4159ef7f9cf9ccd44e19Martin Schwidefsky{ 1235b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pgste_t pgste; 1236b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pte_t pte; 1237b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky 1238d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky if (mm_has_pgste(vma->vm_mm)) { 1239b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pgste = pgste_get_lock(ptep); 124055dbbdd9a832b3c0546a65df155d9e6eee8c312eMartin Schwidefsky pgste = pgste_ipte_notify(vma->vm_mm, address, ptep, pgste); 1241d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky } 1242b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky 1243b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pte = *ptep; 124453e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky ptep_flush_direct(vma->vm_mm, address, ptep); 1245e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky pte_val(*ptep) = _PAGE_INVALID; 1246b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky 1247b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky if (mm_has_pgste(vma->vm_mm)) { 1248b31288fa83b2bcc8834e1e208e9526b8bd5ce361Konstantin Weitz if ((pgste_val(pgste) & _PGSTE_GPS_USAGE_MASK) == 1249b31288fa83b2bcc8834e1e208e9526b8bd5ce361Konstantin Weitz _PGSTE_GPS_USAGE_UNUSED) 1250b31288fa83b2bcc8834e1e208e9526b8bd5ce361Konstantin Weitz pte_val(pte) |= _PAGE_UNUSED; 125165eef33550f68e9a7f7d2dc64da94fb6cb85be2cDominik Dingel pgste = pgste_update_all(&pte, pgste, vma->vm_mm); 1252b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pgste_set_unlock(ptep, pgste); 1253b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky } 12541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return pte; 12551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1257ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky/* 1258ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky * The batched pte unmap code uses ptep_get_and_clear_full to clear the 1259ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky * ptes. Here an optimization is possible. tlb_gather_mmu flushes all 1260ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky * tlbs of an mm if it can guarantee that the ptes of the mm_struct 1261ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky * cannot be accessed while the batched unmap is running. In this case 1262ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky * full==1 and a simple pte_clear is enough. See tlb.h. 1263ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky */ 1264ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL 1265ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefskystatic inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, 1266b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky unsigned long address, 1267ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky pte_t *ptep, int full) 12681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1269b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pgste_t pgste; 1270b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pte_t pte; 1271b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky 1272a055f66a3a099e2c886a53421405f98683e94b2bMartin Schwidefsky if (!full && mm_has_pgste(mm)) { 1273b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pgste = pgste_get_lock(ptep); 127455dbbdd9a832b3c0546a65df155d9e6eee8c312eMartin Schwidefsky pgste = pgste_ipte_notify(mm, address, ptep, pgste); 1275d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky } 1276ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky 1277b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pte = *ptep; 1278b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky if (!full) 12795c474a1e2265c5156e6c63f87a7e99053039b8b9Martin Schwidefsky ptep_flush_lazy(mm, address, ptep); 1280e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky pte_val(*ptep) = _PAGE_INVALID; 1281b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky 1282a055f66a3a099e2c886a53421405f98683e94b2bMartin Schwidefsky if (!full && mm_has_pgste(mm)) { 128365eef33550f68e9a7f7d2dc64da94fb6cb85be2cDominik Dingel pgste = pgste_update_all(&pte, pgste, mm); 1284b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pgste_set_unlock(ptep, pgste); 1285b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky } 1286ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky return pte; 12871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1289ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky#define __HAVE_ARCH_PTEP_SET_WRPROTECT 1290b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefskystatic inline pte_t ptep_set_wrprotect(struct mm_struct *mm, 1291b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky unsigned long address, pte_t *ptep) 1292b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky{ 1293b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pgste_t pgste; 1294b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pte_t pte = *ptep; 1295b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky 1296b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky if (pte_write(pte)) { 1297d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky if (mm_has_pgste(mm)) { 1298b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pgste = pgste_get_lock(ptep); 129955dbbdd9a832b3c0546a65df155d9e6eee8c312eMartin Schwidefsky pgste = pgste_ipte_notify(mm, address, ptep, pgste); 1300d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky } 1301b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky 13025c474a1e2265c5156e6c63f87a7e99053039b8b9Martin Schwidefsky ptep_flush_lazy(mm, address, ptep); 1303abf09bed3cceadd809f0356065c2ada6cee90d4aMartin Schwidefsky pte = pte_wrprotect(pte); 1304b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky 1305abf09bed3cceadd809f0356065c2ada6cee90d4aMartin Schwidefsky if (mm_has_pgste(mm)) { 13060a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky pgste = pgste_set_pte(ptep, pgste, pte); 1307b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pgste_set_unlock(ptep, pgste); 1308abf09bed3cceadd809f0356065c2ada6cee90d4aMartin Schwidefsky } else 1309abf09bed3cceadd809f0356065c2ada6cee90d4aMartin Schwidefsky *ptep = pte; 1310b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky } 1311b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky return pte; 1312b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky} 1313ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky 1314ba8a9229ab9e80278c28ad68b15053f65b2b0a7cMartin Schwidefsky#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS 1315b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefskystatic inline int ptep_set_access_flags(struct vm_area_struct *vma, 1316b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky unsigned long address, pte_t *ptep, 1317b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pte_t entry, int dirty) 1318b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky{ 1319b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pgste_t pgste; 1320b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky 1321b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky if (pte_same(*ptep, entry)) 1322b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky return 0; 1323d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky if (mm_has_pgste(vma->vm_mm)) { 1324b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pgste = pgste_get_lock(ptep); 132555dbbdd9a832b3c0546a65df155d9e6eee8c312eMartin Schwidefsky pgste = pgste_ipte_notify(vma->vm_mm, address, ptep, pgste); 1326d3383632d4e8e9ae747f582eaee8c2e79f828ae6Martin Schwidefsky } 1327b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky 132853e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky ptep_flush_direct(vma->vm_mm, address, ptep); 1329b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky 1330abf09bed3cceadd809f0356065c2ada6cee90d4aMartin Schwidefsky if (mm_has_pgste(vma->vm_mm)) { 13311951497d90d6754201af3e65241a06f9ef6755cdChristian Borntraeger pgste_set_key(ptep, pgste, entry, vma->vm_mm); 13320a61b222df75a6a69dc34816f7db2f61fee8c935Martin Schwidefsky pgste = pgste_set_pte(ptep, pgste, entry); 1333b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky pgste_set_unlock(ptep, pgste); 1334abf09bed3cceadd809f0356065c2ada6cee90d4aMartin Schwidefsky } else 1335abf09bed3cceadd809f0356065c2ada6cee90d4aMartin Schwidefsky *ptep = entry; 1336b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky return 1; 1337b2fa47e6bf5148aa6dbf22ec79f18141b421eebaMartin Schwidefsky} 13381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 13401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Conversion functions: convert a page and protection to a page entry, 13411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and a page entry and page directory to the page they refer to. 13421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 13431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline pte_t mk_pte_phys(unsigned long physpage, pgprot_t pgprot) 13441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pte_t __pte; 13461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pte_val(__pte) = physpage + pgprot_val(pgprot); 13470944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky return pte_mkyoung(__pte); 13481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13502dcea57ae19275451a756a2d5bf96b329487b0e0Heiko Carstensstatic inline pte_t mk_pte(struct page *page, pgprot_t pgprot) 13512dcea57ae19275451a756a2d5bf96b329487b0e0Heiko Carstens{ 13520b2b6e1ddce4696cb7afcbb15a654fe95428a498Heiko Carstens unsigned long physpage = page_to_phys(page); 1353abf09bed3cceadd809f0356065c2ada6cee90d4aMartin Schwidefsky pte_t __pte = mk_pte_phys(physpage, pgprot); 13541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1355e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky if (pte_write(__pte) && PageDirty(page)) 1356e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky __pte = pte_mkdirty(__pte); 1357abf09bed3cceadd809f0356065c2ada6cee90d4aMartin Schwidefsky return __pte; 13582dcea57ae19275451a756a2d5bf96b329487b0e0Heiko Carstens} 13592dcea57ae19275451a756a2d5bf96b329487b0e0Heiko Carstens 1360190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1)) 1361190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky#define pud_index(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD-1)) 1362190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky#define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)) 1363190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky#define pte_index(address) (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE-1)) 13641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1365190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address)) 1366190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky#define pgd_offset_k(address) pgd_offset(&init_mm, address) 13671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1368f4815ac6c935b8e441fe12504d62e0e8ff7f7ce5Heiko Carstens#ifndef CONFIG_64BIT 13691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1370190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky#define pmd_deref(pmd) (pmd_val(pmd) & _SEGMENT_ENTRY_ORIGIN) 1371190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky#define pud_deref(pmd) ({ BUG(); 0UL; }) 1372190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky#define pgd_deref(pmd) ({ BUG(); 0UL; }) 137346a82b2d5591335277ed2930611f6acb4ce654edDave McCracken 1374190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky#define pud_offset(pgd, address) ((pud_t *) pgd) 1375190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky#define pmd_offset(pud, address) ((pmd_t *) pud + pmd_index(address)) 13761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1377f4815ac6c935b8e441fe12504d62e0e8ff7f7ce5Heiko Carstens#else /* CONFIG_64BIT */ 13781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1379190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky#define pmd_deref(pmd) (pmd_val(pmd) & _SEGMENT_ENTRY_ORIGIN) 1380190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky#define pud_deref(pud) (pud_val(pud) & _REGION_ENTRY_ORIGIN) 13815a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky#define pgd_deref(pgd) (pgd_val(pgd) & _REGION_ENTRY_ORIGIN) 13821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13835a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefskystatic inline pud_t *pud_offset(pgd_t *pgd, unsigned long address) 13845a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky{ 13856252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky pud_t *pud = (pud_t *) pgd; 13866252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky if ((pgd_val(*pgd) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R2) 13876252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky pud = (pud_t *) pgd_deref(*pgd); 13885a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky return pud + pud_index(address); 13895a216a20837c5f5fa1ca4b8ae8991ffd96b08e6fMartin Schwidefsky} 13901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1391190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefskystatic inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) 13921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13936252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky pmd_t *pmd = (pmd_t *) pud; 13946252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky if ((pud_val(*pud) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R3) 13956252d702c5311ce916caf75ed82e5c8245171c92Martin Schwidefsky pmd = (pmd_t *) pud_deref(*pud); 1396190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky return pmd + pmd_index(address); 13971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1399f4815ac6c935b8e441fe12504d62e0e8ff7f7ce5Heiko Carstens#endif /* CONFIG_64BIT */ 14001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1401190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky#define pfn_pte(pfn,pgprot) mk_pte_phys(__pa((pfn) << PAGE_SHIFT),(pgprot)) 1402190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky#define pte_pfn(x) (pte_val(x) >> PAGE_SHIFT) 1403190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky#define pte_page(x) pfn_to_page(pte_pfn(x)) 14041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1405152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky#define pmd_page(pmd) pfn_to_page(pmd_pfn(pmd)) 14061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1407190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky/* Find an entry in the lowest level page table.. */ 1408190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky#define pte_offset(pmd, addr) ((pte_t *) pmd_deref(*(pmd)) + pte_index(addr)) 1409190a1d722a59725706daf832bc8a511ed62f249dMartin Schwidefsky#define pte_offset_kernel(pmd, address) pte_offset(pmd,address) 14101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define pte_offset_map(pmd, address) pte_offset_kernel(pmd, address) 14111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define pte_unmap(pte) do { } while (0) 14121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1413106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaefer#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLB_PAGE) 14141ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaeferstatic inline unsigned long massage_pgprot_pmd(pgprot_t pgprot) 14151ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer{ 1416d8e7a33df0976459674dece4b630b5d59796ece7Gerald Schaefer /* 1417e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky * pgprot is PAGE_NONE, PAGE_READ, or PAGE_WRITE (see __Pxxx / __Sxxx) 1418d8e7a33df0976459674dece4b630b5d59796ece7Gerald Schaefer * Convert to segment table entry format. 1419d8e7a33df0976459674dece4b630b5d59796ece7Gerald Schaefer */ 1420d8e7a33df0976459674dece4b630b5d59796ece7Gerald Schaefer if (pgprot_val(pgprot) == pgprot_val(PAGE_NONE)) 1421d8e7a33df0976459674dece4b630b5d59796ece7Gerald Schaefer return pgprot_val(SEGMENT_NONE); 1422e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky if (pgprot_val(pgprot) == pgprot_val(PAGE_READ)) 1423e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky return pgprot_val(SEGMENT_READ); 1424e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky return pgprot_val(SEGMENT_WRITE); 14251ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer} 14261ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer 1427152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefskystatic inline pmd_t pmd_wrprotect(pmd_t pmd) 14280944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky{ 1429152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky pmd_val(pmd) &= ~_SEGMENT_ENTRY_WRITE; 1430152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky pmd_val(pmd) |= _SEGMENT_ENTRY_PROTECT; 1431152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky return pmd; 1432152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky} 1433152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky 1434152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefskystatic inline pmd_t pmd_mkwrite(pmd_t pmd) 1435152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky{ 1436152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky pmd_val(pmd) |= _SEGMENT_ENTRY_WRITE; 1437152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky if (pmd_large(pmd) && !(pmd_val(pmd) & _SEGMENT_ENTRY_DIRTY)) 1438152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky return pmd; 1439152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky pmd_val(pmd) &= ~_SEGMENT_ENTRY_PROTECT; 1440152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky return pmd; 1441152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky} 1442152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky 1443152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefskystatic inline pmd_t pmd_mkclean(pmd_t pmd) 1444152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky{ 1445152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky if (pmd_large(pmd)) { 1446152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky pmd_val(pmd) &= ~_SEGMENT_ENTRY_DIRTY; 14470944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky pmd_val(pmd) |= _SEGMENT_ENTRY_PROTECT; 1448152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky } 1449152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky return pmd; 1450152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky} 1451152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky 1452152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefskystatic inline pmd_t pmd_mkdirty(pmd_t pmd) 1453152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky{ 1454152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky if (pmd_large(pmd)) { 1455152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky pmd_val(pmd) |= _SEGMENT_ENTRY_DIRTY; 1456152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky if (pmd_val(pmd) & _SEGMENT_ENTRY_WRITE) 1457152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky pmd_val(pmd) &= ~_SEGMENT_ENTRY_PROTECT; 1458152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky } 1459152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky return pmd; 1460152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky} 1461152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky 1462152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefskystatic inline pmd_t pmd_mkyoung(pmd_t pmd) 1463152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky{ 1464152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky if (pmd_large(pmd)) { 14650944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky pmd_val(pmd) |= _SEGMENT_ENTRY_YOUNG; 1466152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky if (pmd_val(pmd) & _SEGMENT_ENTRY_READ) 1467152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky pmd_val(pmd) &= ~_SEGMENT_ENTRY_INVALID; 14680944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky } 14690944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky return pmd; 14700944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky} 14710944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky 14720944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefskystatic inline pmd_t pmd_mkold(pmd_t pmd) 14730944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky{ 1474152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky if (pmd_large(pmd)) { 14750944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky pmd_val(pmd) &= ~_SEGMENT_ENTRY_YOUNG; 14760944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky pmd_val(pmd) |= _SEGMENT_ENTRY_INVALID; 14770944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky } 14780944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky return pmd; 14790944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky} 14800944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky 14811ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaeferstatic inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot) 14821ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer{ 1483152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky if (pmd_large(pmd)) { 1484152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky pmd_val(pmd) &= _SEGMENT_ENTRY_ORIGIN_LARGE | 1485152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky _SEGMENT_ENTRY_DIRTY | _SEGMENT_ENTRY_YOUNG | 1486152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky _SEGMENT_ENTRY_LARGE | _SEGMENT_ENTRY_SPLIT; 1487152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky pmd_val(pmd) |= massage_pgprot_pmd(newprot); 1488152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky if (!(pmd_val(pmd) & _SEGMENT_ENTRY_DIRTY)) 1489152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky pmd_val(pmd) |= _SEGMENT_ENTRY_PROTECT; 1490152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky if (!(pmd_val(pmd) & _SEGMENT_ENTRY_YOUNG)) 1491152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky pmd_val(pmd) |= _SEGMENT_ENTRY_INVALID; 1492152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky return pmd; 1493152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky } 1494152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky pmd_val(pmd) &= _SEGMENT_ENTRY_ORIGIN; 14951ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer pmd_val(pmd) |= massage_pgprot_pmd(newprot); 14961ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer return pmd; 14971ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer} 14981ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer 1499106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaeferstatic inline pmd_t mk_pmd_phys(unsigned long physpage, pgprot_t pgprot) 15001ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer{ 1501106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaefer pmd_t __pmd; 1502106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaefer pmd_val(__pmd) = physpage + massage_pgprot_pmd(pgprot); 1503152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky return __pmd; 15041ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer} 15051ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer 1506106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaefer#endif /* CONFIG_TRANSPARENT_HUGEPAGE || CONFIG_HUGETLB_PAGE */ 1507106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaefer 15081b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefskystatic inline void __pmdp_csp(pmd_t *pmdp) 15091b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky{ 15101b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky register unsigned long reg2 asm("2") = pmd_val(*pmdp); 15111b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky register unsigned long reg3 asm("3") = pmd_val(*pmdp) | 15121b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky _SEGMENT_ENTRY_INVALID; 15131b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky register unsigned long reg4 asm("4") = ((unsigned long) pmdp) + 5; 15141b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky 15151b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky asm volatile( 15161b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky " csp %1,%3" 15171b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky : "=m" (*pmdp) 15181b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky : "d" (reg2), "d" (reg3), "d" (reg4), "m" (*pmdp) : "cc"); 15191b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky} 15201b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky 15211b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefskystatic inline void __pmdp_idte(unsigned long address, pmd_t *pmdp) 15221b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky{ 15231b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky unsigned long sto; 15241b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky 15251b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky sto = (unsigned long) pmdp - pmd_index(address) * sizeof(pmd_t); 15261b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky asm volatile( 15271b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky " .insn rrf,0xb98e0000,%2,%3,0,0" 15281b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky : "=m" (*pmdp) 15291b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky : "m" (*pmdp), "a" (sto), "a" ((address & HPAGE_MASK)) 15301b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky : "cc" ); 15311b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky} 15321b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky 15331b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefskystatic inline void __pmdp_idte_local(unsigned long address, pmd_t *pmdp) 15341b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky{ 15351b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky unsigned long sto; 15361b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky 15371b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky sto = (unsigned long) pmdp - pmd_index(address) * sizeof(pmd_t); 15381b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky asm volatile( 15391b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky " .insn rrf,0xb98e0000,%2,%3,0,1" 15401b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky : "=m" (*pmdp) 15411b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky : "m" (*pmdp), "a" (sto), "a" ((address & HPAGE_MASK)) 15421b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky : "cc" ); 15431b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky} 15441b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky 15451b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefskystatic inline void pmdp_flush_direct(struct mm_struct *mm, 15461b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky unsigned long address, pmd_t *pmdp) 15471b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky{ 15481b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky int active, count; 15491b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky 15501b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky if (pmd_val(*pmdp) & _SEGMENT_ENTRY_INVALID) 15511b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky return; 15521b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky if (!MACHINE_HAS_IDTE) { 15531b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky __pmdp_csp(pmdp); 15541b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky return; 15551b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky } 15561b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky active = (mm == current->active_mm) ? 1 : 0; 15571b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky count = atomic_add_return(0x10000, &mm->context.attach_count); 15581b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky if (MACHINE_HAS_TLB_LC && (count & 0xffff) <= active && 15591b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky cpumask_equal(mm_cpumask(mm), cpumask_of(smp_processor_id()))) 15601b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky __pmdp_idte_local(address, pmdp); 15611b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky else 15621b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky __pmdp_idte(address, pmdp); 15631b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky atomic_sub(0x10000, &mm->context.attach_count); 15641b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky} 15651b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky 15663eabaee998c787e7e1565574821652548f7fc003Martin Schwidefskystatic inline void pmdp_flush_lazy(struct mm_struct *mm, 15673eabaee998c787e7e1565574821652548f7fc003Martin Schwidefsky unsigned long address, pmd_t *pmdp) 15683eabaee998c787e7e1565574821652548f7fc003Martin Schwidefsky{ 156953e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky int active, count; 15703eabaee998c787e7e1565574821652548f7fc003Martin Schwidefsky 15711b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky if (pmd_val(*pmdp) & _SEGMENT_ENTRY_INVALID) 15721b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky return; 157353e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky active = (mm == current->active_mm) ? 1 : 0; 157453e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky count = atomic_add_return(0x10000, &mm->context.attach_count); 157553e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky if ((count & 0xffff) <= active) { 157653e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky pmd_val(*pmdp) |= _SEGMENT_ENTRY_INVALID; 15773eabaee998c787e7e1565574821652548f7fc003Martin Schwidefsky mm->context.flush_mm = 1; 15781b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky } else if (MACHINE_HAS_IDTE) 15791b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky __pmdp_idte(address, pmdp); 15801b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky else 15811b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky __pmdp_csp(pmdp); 158253e857f30867918b3618d8e18902e63291946ef4Martin Schwidefsky atomic_sub(0x10000, &mm->context.attach_count); 15833eabaee998c787e7e1565574821652548f7fc003Martin Schwidefsky} 15843eabaee998c787e7e1565574821652548f7fc003Martin Schwidefsky 1585106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaefer#ifdef CONFIG_TRANSPARENT_HUGEPAGE 1586106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaefer 1587106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaefer#define __HAVE_ARCH_PGTABLE_DEPOSIT 15886b0b50b0617fad5f2af3b928596a25f7de8dbf50Aneesh Kumar K.Vextern void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp, 15896b0b50b0617fad5f2af3b928596a25f7de8dbf50Aneesh Kumar K.V pgtable_t pgtable); 1590106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaefer 1591106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaefer#define __HAVE_ARCH_PGTABLE_WITHDRAW 15926b0b50b0617fad5f2af3b928596a25f7de8dbf50Aneesh Kumar K.Vextern pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp); 1593106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaefer 1594106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaeferstatic inline int pmd_trans_splitting(pmd_t pmd) 1595106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaefer{ 1596152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky return (pmd_val(pmd) & _SEGMENT_ENTRY_LARGE) && 1597152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky (pmd_val(pmd) & _SEGMENT_ENTRY_SPLIT); 1598106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaefer} 1599106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaefer 1600106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaeferstatic inline void set_pmd_at(struct mm_struct *mm, unsigned long addr, 1601106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaefer pmd_t *pmdp, pmd_t entry) 1602106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaefer{ 1603106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaefer *pmdp = entry; 1604106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaefer} 1605106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaefer 1606106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaeferstatic inline pmd_t pmd_mkhuge(pmd_t pmd) 1607106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaefer{ 1608106c992a5ebef28193cf5958e49ceff5e4aebb04Gerald Schaefer pmd_val(pmd) |= _SEGMENT_ENTRY_LARGE; 1609152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky pmd_val(pmd) |= _SEGMENT_ENTRY_YOUNG; 1610152125b7a882df36a55a8eadbea6d0edf1461ee7Martin Schwidefsky pmd_val(pmd) |= _SEGMENT_ENTRY_PROTECT; 16111ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer return pmd; 16121ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer} 16131ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer 16141ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer#define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG 16151ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaeferstatic inline int pmdp_test_and_clear_young(struct vm_area_struct *vma, 16161ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer unsigned long address, pmd_t *pmdp) 16171ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer{ 16180944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky pmd_t pmd; 16191ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer 16200944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky pmd = *pmdp; 16211b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky pmdp_flush_direct(vma->vm_mm, address, pmdp); 16220944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky *pmdp = pmd_mkold(pmd); 16230944fe3f4a323f436180d39402cae7f9c46ead17Martin Schwidefsky return pmd_young(pmd); 16241ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer} 16251ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer 16261ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer#define __HAVE_ARCH_PMDP_GET_AND_CLEAR 16271ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaeferstatic inline pmd_t pmdp_get_and_clear(struct mm_struct *mm, 16281ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer unsigned long address, pmd_t *pmdp) 16291ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer{ 16301ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer pmd_t pmd = *pmdp; 16311ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer 16321b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky pmdp_flush_direct(mm, address, pmdp); 16331ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer pmd_clear(pmdp); 16341ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer return pmd; 16351ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer} 16361ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer 16371ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer#define __HAVE_ARCH_PMDP_CLEAR_FLUSH 16381ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaeferstatic inline pmd_t pmdp_clear_flush(struct vm_area_struct *vma, 16391ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer unsigned long address, pmd_t *pmdp) 16401ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer{ 16411ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer return pmdp_get_and_clear(vma->vm_mm, address, pmdp); 16421ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer} 16431ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer 16441ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer#define __HAVE_ARCH_PMDP_INVALIDATE 16451ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaeferstatic inline void pmdp_invalidate(struct vm_area_struct *vma, 16461ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer unsigned long address, pmd_t *pmdp) 16471ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer{ 16481b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky pmdp_flush_direct(vma->vm_mm, address, pmdp); 16491ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer} 16501ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer 1651be3286507dab888d4aad9f91fd6ff5202b24cd5bGerald Schaefer#define __HAVE_ARCH_PMDP_SET_WRPROTECT 1652be3286507dab888d4aad9f91fd6ff5202b24cd5bGerald Schaeferstatic inline void pmdp_set_wrprotect(struct mm_struct *mm, 1653be3286507dab888d4aad9f91fd6ff5202b24cd5bGerald Schaefer unsigned long address, pmd_t *pmdp) 1654be3286507dab888d4aad9f91fd6ff5202b24cd5bGerald Schaefer{ 1655be3286507dab888d4aad9f91fd6ff5202b24cd5bGerald Schaefer pmd_t pmd = *pmdp; 1656be3286507dab888d4aad9f91fd6ff5202b24cd5bGerald Schaefer 1657be3286507dab888d4aad9f91fd6ff5202b24cd5bGerald Schaefer if (pmd_write(pmd)) { 16581b948d6caec4f28e3524244ca0f77c6ae8ddceefMartin Schwidefsky pmdp_flush_direct(mm, address, pmdp); 1659be3286507dab888d4aad9f91fd6ff5202b24cd5bGerald Schaefer set_pmd_at(mm, address, pmdp, pmd_wrprotect(pmd)); 1660be3286507dab888d4aad9f91fd6ff5202b24cd5bGerald Schaefer } 1661be3286507dab888d4aad9f91fd6ff5202b24cd5bGerald Schaefer} 1662be3286507dab888d4aad9f91fd6ff5202b24cd5bGerald Schaefer 16631ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer#define pfn_pmd(pfn, pgprot) mk_pmd_phys(__pa((pfn) << PAGE_SHIFT), (pgprot)) 16641ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer#define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot)) 16651ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer 16661ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaeferstatic inline int pmd_trans_huge(pmd_t pmd) 16671ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer{ 16681ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer return pmd_val(pmd) & _SEGMENT_ENTRY_LARGE; 16691ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer} 16701ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer 16711ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaeferstatic inline int has_transparent_hugepage(void) 16721ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer{ 16731ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer return MACHINE_HAS_HPAGE ? 1 : 0; 16741ae1c1d09f220ded48ee9a7d91a65e94f95c4af1Gerald Schaefer} 167575077afbec1ac89178c1542b23a70d0f960b0aafGerald Schaefer#endif /* CONFIG_TRANSPARENT_HUGEPAGE */ 167675077afbec1ac89178c1542b23a70d0f960b0aafGerald Schaefer 16771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 16781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 31 bit swap entry format: 16791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * A page-table entry has some bits we have to treat in a special way. 16801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Bits 0, 20 and bit 23 have to be zero, otherwise an specification 16811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * exception will occur instead of a page translation exception. The 16821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * specifiation exception has the bad habit not to store necessary 16831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * information in the lowcore. 1684e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky * Bits 21, 22, 30 and 31 are used to indicate the page type. 1685e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky * A swap pte is indicated by bit pattern (pte & 0x603) == 0x402 16861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This leaves the bits 1-19 and bits 24-29 to store type and offset. 16871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * We use the 5 bits from 25-29 for the type and the 20 bits from 1-19 16881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * plus 24 for the offset. 16891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0| offset |0110|o|type |00| 16901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0 0000000001111111111 2222 2 22222 33 16911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0 1234567890123456789 0123 4 56789 01 16921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 16931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 64 bit swap entry format: 16941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * A page-table entry has some bits we have to treat in a special way. 16951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Bits 52 and bit 55 have to be zero, otherwise an specification 16961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * exception will occur instead of a page translation exception. The 16971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * specifiation exception has the bad habit not to store necessary 16981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * information in the lowcore. 1699e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky * Bits 53, 54, 62 and 63 are used to indicate the page type. 1700e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky * A swap pte is indicated by bit pattern (pte & 0x603) == 0x402 17011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This leaves the bits 0-51 and bits 56-61 to store type and offset. 17021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * We use the 5 bits from 57-61 for the type and the 53 bits from 0-51 17031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * plus 56 for the offset. 17041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * | offset |0110|o|type |00| 17051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0000000000111111111122222222223333333333444444444455 5555 5 55566 66 17061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0123456789012345678901234567890123456789012345678901 2345 6 78901 23 17071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1708f4815ac6c935b8e441fe12504d62e0e8ff7f7ce5Heiko Carstens#ifndef CONFIG_64BIT 17091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define __SWP_OFFSET_MASK (~0UL >> 12) 17101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 17111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define __SWP_OFFSET_MASK (~0UL >> 11) 17121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 17134448aaf0faafff3f275d15937c28b6346760e028Adrian Bunkstatic inline pte_t mk_swap_pte(unsigned long type, unsigned long offset) 17141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 17151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pte_t pte; 17161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds offset &= __SWP_OFFSET_MASK; 1717e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky pte_val(pte) = _PAGE_INVALID | _PAGE_TYPE | ((type & 0x1f) << 2) | 17181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((offset & 1UL) << 7) | ((offset & ~1UL) << 11); 17191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return pte; 17201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define __swp_type(entry) (((entry).val >> 2) & 0x1f) 17231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define __swp_offset(entry) (((entry).val >> 11) | (((entry).val >> 7) & 1)) 17241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define __swp_entry(type,offset) ((swp_entry_t) { pte_val(mk_swap_pte((type),(offset))) }) 17251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) 17271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define __swp_entry_to_pte(x) ((pte_t) { (x).val }) 17281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1729f4815ac6c935b8e441fe12504d62e0e8ff7f7ce5Heiko Carstens#ifndef CONFIG_64BIT 17301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds# define PTE_FILE_MAX_BITS 26 1731f4815ac6c935b8e441fe12504d62e0e8ff7f7ce5Heiko Carstens#else /* CONFIG_64BIT */ 17321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds# define PTE_FILE_MAX_BITS 59 1733f4815ac6c935b8e441fe12504d62e0e8ff7f7ce5Heiko Carstens#endif /* CONFIG_64BIT */ 17341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define pte_to_pgoff(__pte) \ 17361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((((__pte).pte >> 12) << 7) + (((__pte).pte >> 1) & 0x7f)) 17371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define pgoff_to_pte(__off) \ 17391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((pte_t) { ((((__off) & 0x7f) << 1) + (((__off) >> 7) << 12)) \ 1740e509861105a3c1425f3f929bd631f88340b499bfMartin Schwidefsky | _PAGE_INVALID | _PAGE_PROTECT }) 17411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* !__ASSEMBLY__ */ 17431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define kern_addr_valid(addr) (1) 17451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 174617f345808563d2f425b2b15d60c4a5b00112e9ebHeiko Carstensextern int vmem_add_mapping(unsigned long start, unsigned long size); 174717f345808563d2f425b2b15d60c4a5b00112e9ebHeiko Carstensextern int vmem_remove_mapping(unsigned long start, unsigned long size); 1748402b08622d9ac6e32e25289573272e0f21bb58a7Carsten Otteextern int s390_enable_sie(void); 1749934bc131efc3e4be6a52f7dd6c4dbf99635e381aDominik Dingelextern void s390_enable_skey(void); 1750f4eb07c17df2e6cf9bd58bfcd9cc9e05e9489d07Heiko Carstens 17511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 17521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * No page table caches to initialise 17531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1754765a0cac566c938821ae26efb4aa53b7502ee82cHeiko Carstensstatic inline void pgtable_cache_init(void) { } 1755765a0cac566c938821ae26efb4aa53b7502ee82cHeiko Carstensstatic inline void check_pgt_cache(void) { } 17561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm-generic/pgtable.h> 17581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* _S390_PAGE_H */ 1760