hv.c revision 98e087022b611c6f748c74d952193ccf69280f52
13e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen/* 23e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen * Copyright (c) 2009, Microsoft Corporation. 33e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen * 43e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen * This program is free software; you can redistribute it and/or modify it 53e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen * under the terms and conditions of the GNU General Public License, 63e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen * version 2, as published by the Free Software Foundation. 73e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen * 83e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen * This program is distributed in the hope it will be useful, but WITHOUT 93e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 103e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 113e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen * more details. 123e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen * 133e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen * You should have received a copy of the GNU General Public License along with 143e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen * this program; if not, write to the Free Software Foundation, Inc., 59 Temple 153e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen * Place - Suite 330, Boston, MA 02111-1307 USA. 163e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen * 173e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen * Authors: 183e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen * Haiyang Zhang <haiyangz@microsoft.com> 193e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen * Hank Janssen <hjanssen@microsoft.com> 203e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen * 213e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen */ 22a0086dc512ba6c2161dcf48195daf177ad0c3615Greg Kroah-Hartman#include <linux/kernel.h> 23a0086dc512ba6c2161dcf48195daf177ad0c3615Greg Kroah-Hartman#include <linux/mm.h> 245a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 25b7c947f04888b8bb2dc79832c10ede73c5b8dae2Bill Pemberton#include <linux/vmalloc.h> 26e3fe0bb65b2686aa83dabdb1ecc22f5d80c536f8K. Y. Srinivasan#include "hv_api.h" 27645954c54287faee983d37705b80e9ae90c63782Greg Kroah-Hartman#include "logging.h" 2872daf320fb322dc200824e2be17e69553a53fc8aGreg Kroah-Hartman#include "vmbus_private.h" 293e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 30454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton/* The one and only */ 316a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhangstruct hv_context hv_context = { 326a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang .synic_initialized = false, 336a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang .hypercall_page = NULL, 346a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang .signal_event_param = NULL, 356a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang .signal_event_buffer = NULL, 363e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen}; 373e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 383e18951955797872558dad615851a4ca63b2770eHank Janssen/* 39d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * query_hypervisor_presence 40d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * - Query the cpuid for presense of windows hypervisor 410831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 42d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangstatic int query_hypervisor_presence(void) 433e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 440831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int eax; 450831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int ebx; 460831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int ecx; 470831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int edx; 480831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int op; 493e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 50454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton eax = 0; 51454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton ebx = 0; 52454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton ecx = 0; 53454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton edx = 0; 54f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang op = HVCPUID_VERSION_FEATURES; 55f931a70c370cc826191a51a79500b34cd592b25bGreg Kroah-Hartman cpuid(op, &eax, &ebx, &ecx, &edx); 560831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman 570831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman return ecx & HV_PRESENT_BIT; 583e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 593e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 603e18951955797872558dad615851a4ca63b2770eHank Janssen/* 61d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * query_hypervisor_info - Get version info of the windows hypervisor 620831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 63d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangstatic int query_hypervisor_info(void) 640831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman{ 650831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int eax; 660831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int ebx; 670831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int ecx; 680831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int edx; 69b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang unsigned int max_leaf; 700831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int op; 713e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 720831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman /* 730831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * Its assumed that this is called after confirming that Viridian 740831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * is present. Query id and revision. 750831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 760831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman eax = 0; 770831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ebx = 0; 780831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ecx = 0; 790831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman edx = 0; 80f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang op = HVCPUID_VENDOR_MAXFUNCTION; 810831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman cpuid(op, &eax, &ebx, &ecx, &edx); 823e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 8398e087022b611c6f748c74d952193ccf69280f52Hank Janssen/* DPRINT_INFO(VMBUS, "Vendor ID: %c%c%c%c%c%c%c%c%c%c%c%c", 840831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman (ebx & 0xFF), 850831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ((ebx >> 8) & 0xFF), 860831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ((ebx >> 16) & 0xFF), 870831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ((ebx >> 24) & 0xFF), 880831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman (ecx & 0xFF), 890831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ((ecx >> 8) & 0xFF), 900831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ((ecx >> 16) & 0xFF), 910831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ((ecx >> 24) & 0xFF), 920831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman (edx & 0xFF), 930831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ((edx >> 8) & 0xFF), 940831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ((edx >> 16) & 0xFF), 950831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ((edx >> 24) & 0xFF)); 9698e087022b611c6f748c74d952193ccf69280f52Hank Janssen*/ 97b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang max_leaf = eax; 9898e087022b611c6f748c74d952193ccf69280f52Hank Janssen/* eax = 0; 990831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ebx = 0; 1000831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ecx = 0; 1010831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman edx = 0; 102f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang op = HVCPUID_INTERFACE; 1030831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman cpuid(op, &eax, &ebx, &ecx, &edx); 1043e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 1050831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman DPRINT_INFO(VMBUS, "Interface ID: %c%c%c%c", 1060831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman (eax & 0xFF), 1070831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ((eax >> 8) & 0xFF), 1080831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ((eax >> 16) & 0xFF), 1090831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ((eax >> 24) & 0xFF)); 11098e087022b611c6f748c74d952193ccf69280f52Hank Janssen*/ 1110831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman 112b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang if (max_leaf >= HVCPUID_VERSION) { 1130831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman eax = 0; 1140831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ebx = 0; 1150831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ecx = 0; 1160831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman edx = 0; 117f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang op = HVCPUID_VERSION; 1180831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman cpuid(op, &eax, &ebx, &ecx, &edx); 1190831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman DPRINT_INFO(VMBUS, "OS Build:%d-%d.%d-%d-%d.%d",\ 1200831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman eax, 1210831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ebx >> 16, 1220831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ebx & 0xFFFF, 1230831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ecx, 1240831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman edx >> 24, 1250831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman edx & 0xFFFFFF); 1260831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman } 127b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang return max_leaf; 1280831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman} 1293e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 1303e18951955797872558dad615851a4ca63b2770eHank Janssen/* 131d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * do_hypercall- Invoke the specified hypercall 1320831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 133d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangstatic u64 do_hypercall(u64 control, void *input, void *output) 1343e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 135530cf2070be30831a371b6c7181d15e5976b6fc7Greg Kroah-Hartman#ifdef CONFIG_X86_64 136b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u64 hv_status = 0; 137b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u64 input_address = (input) ? virt_to_phys(input) : 0; 138b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u64 output_address = (output) ? virt_to_phys(output) : 0; 139b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang volatile void *hypercall_page = hv_context.hypercall_page; 1403e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 141b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang __asm__ __volatile__("mov %0, %%r8" : : "r" (output_address) : "r8"); 142b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang __asm__ __volatile__("call *%3" : "=a" (hv_status) : 143b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "c" (control), "d" (input_address), 144b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "m" (hypercall_page)); 1453e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 146b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang return hv_status; 1473e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 1483e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen#else 1493e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 150b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 control_hi = control >> 32; 151b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 control_lo = control & 0xFFFFFFFF; 152b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 hv_status_hi = 1; 153b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 hv_status_lo = 1; 154b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u64 input_address = (input) ? virt_to_phys(input) : 0; 155b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 input_address_hi = input_address >> 32; 156b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 input_address_lo = input_address & 0xFFFFFFFF; 157b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u64 output_address = (output) ? virt_to_phys(output) : 0; 158b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 output_address_hi = output_address >> 32; 159b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 output_address_lo = output_address & 0xFFFFFFFF; 160b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang volatile void *hypercall_page = hv_context.hypercall_page; 1613e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 162b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang __asm__ __volatile__ ("call *%8" : "=d"(hv_status_hi), 163b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "=a"(hv_status_lo) : "d" (control_hi), 164b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "a" (control_lo), "b" (input_address_hi), 165b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "c" (input_address_lo), "D"(output_address_hi), 166b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "S"(output_address_lo), "m" (hypercall_page)); 1673e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 168b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang return hv_status_lo | ((u64)hv_status_hi << 32); 1690831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman#endif /* !x86_64 */ 1703e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 1713e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 1723e18951955797872558dad615851a4ca63b2770eHank Janssen/* 173d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_init - Main initialization routine. 1740831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * 1750831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * This routine must be called before any other routines in here are called 1760831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 177d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangint hv_init(void) 1783e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 1790831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman int ret = 0; 180b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang int max_leaf; 181b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang union hv_x64_msr_hypercall_contents hypercall_msr; 182b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang void *virtaddr = NULL; 1833e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 1846a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang memset(hv_context.synic_event_page, 0, sizeof(void *) * MAX_NUM_CPUS); 1856a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang memset(hv_context.synic_message_page, 0, 1866a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang sizeof(void *) * MAX_NUM_CPUS); 1873e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 18898e087022b611c6f748c74d952193ccf69280f52Hank Janssen if (!query_hypervisor_presence()) 1893e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen goto Cleanup; 1903e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 191d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang max_leaf = query_hypervisor_info(); 1920831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman /* HvQueryHypervisorFeatures(maxLeaf); */ 1933e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 1940831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman /* 195a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen * We only support running on top of Hyper-V 1960831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 1976a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang rdmsrl(HV_X64_MSR_GUEST_OS_ID, hv_context.guestid); 198a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 19998e087022b611c6f748c74d952193ccf69280f52Hank Janssen if (hv_context.guestid != 0) 200a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen goto Cleanup; 2013e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 202a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen /* Write our OS info */ 203a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen wrmsrl(HV_X64_MSR_GUEST_OS_ID, HV_LINUX_GUEST_ID); 2046a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.guestid = HV_LINUX_GUEST_ID; 205a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 206454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton /* See if the hypercall page is already set */ 207b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); 2083e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 209a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen /* 210a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen * Allocate the hypercall page memory 211203df82d81a331e16caee4c2346cd382fcd820d6Haiyang Zhang * virtaddr = osd_page_alloc(1); 212a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen */ 213df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan virtaddr = __vmalloc(PAGE_SIZE, GFP_KERNEL, PAGE_KERNEL_EXEC); 2143e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 21598e087022b611c6f748c74d952193ccf69280f52Hank Janssen if (!virtaddr) 216a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen goto Cleanup; 2173e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 218b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hypercall_msr.enable = 1; 219a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 220b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hypercall_msr.guest_physical_address = vmalloc_to_pfn(virtaddr); 221b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); 222a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 223a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen /* Confirm that hypercall page did get setup. */ 224b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hypercall_msr.as_uint64 = 0; 225b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); 226a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 22798e087022b611c6f748c74d952193ccf69280f52Hank Janssen if (!hypercall_msr.enable) 2283e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen goto Cleanup; 2293e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 230b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hv_context.hypercall_page = virtaddr; 231a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 232454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton /* Setup the global signal event param for the signal event hypercall */ 2336a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_buffer = 2340831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman kmalloc(sizeof(struct hv_input_signal_event_buffer), 2350831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman GFP_KERNEL); 2366a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (!hv_context.signal_event_buffer) 2373e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen goto Cleanup; 2383e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2396a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param = 2400831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman (struct hv_input_signal_event *) 2417350968193f9b94c4a4b7d14d7a44333a322c5d7Uwe Kleine-König (ALIGN((unsigned long) 2426a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_buffer, 2430831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman HV_HYPERCALL_PARAM_ALIGN)); 2446a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param->connectionid.asu32 = 0; 2456a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param->connectionid.u.id = 2460831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman VMBUS_EVENT_CONNECTION_ID; 2476a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param->flag_number = 0; 2486a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param->rsvdz = 0; 2493e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2500831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman return ret; 2513e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2523e7ee4902fe6996048f03433dd111426db3cfa92Hank JanssenCleanup: 253b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang if (virtaddr) { 254b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang if (hypercall_msr.enable) { 255b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hypercall_msr.as_uint64 = 0; 256b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); 2573e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen } 2583e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 259b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang vfree(virtaddr); 2603e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen } 2613e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen ret = -1; 2623e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen return ret; 2633e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 2643e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2653e18951955797872558dad615851a4ca63b2770eHank Janssen/* 266d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_cleanup - Cleanup routine. 2670831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * 2680831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * This routine is called normally during driver unloading or exiting. 2690831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 270d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangvoid hv_cleanup(void) 2713e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 272b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang union hv_x64_msr_hypercall_contents hypercall_msr; 2733e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2746a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang kfree(hv_context.signal_event_buffer); 2756a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_buffer = NULL; 2766a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param = NULL; 2773e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2786a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (hv_context.hypercall_page) { 279b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hypercall_msr.as_uint64 = 0; 280b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); 2816a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang vfree(hv_context.hypercall_page); 2826a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.hypercall_page = NULL; 2833e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen } 2843e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 2853e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2863e18951955797872558dad615851a4ca63b2770eHank Janssen/* 287d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_post_message - Post a message using the hypervisor message IPC. 2880831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * 2890831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * This involves a hypercall. 2900831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 291d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangu16 hv_post_message(union hv_connection_id connection_id, 292b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang enum hv_message_type message_type, 293b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang void *payload, size_t payload_size) 2943e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 295b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang struct aligned_input { 2960831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman u64 alignment8; 297cba4decdd3dcd224b17631572456951aace0a27eGreg Kroah-Hartman struct hv_input_post_message msg; 2983e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen }; 2993e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 300b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang struct hv_input_post_message *aligned_msg; 301034469e6338b8d683419e3ee7f2543419dd5b574Greg Kroah-Hartman u16 status; 302c4b0bc94828a86cfb6a975b0e0d92dc1cd389565Greg Kroah-Hartman unsigned long addr; 3033e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 304b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang if (payload_size > HV_MESSAGE_PAYLOAD_BYTE_COUNT) 3053e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen return -1; 3063e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 307b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang addr = (unsigned long)kmalloc(sizeof(struct aligned_input), GFP_ATOMIC); 3083e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen if (!addr) 3093e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen return -1; 3103e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 311b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang aligned_msg = (struct hv_input_post_message *) 3127350968193f9b94c4a4b7d14d7a44333a322c5d7Uwe Kleine-König (ALIGN(addr, HV_HYPERCALL_PARAM_ALIGN)); 3133e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 314b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang aligned_msg->connectionid = connection_id; 315b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang aligned_msg->message_type = message_type; 316b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang aligned_msg->payload_size = payload_size; 317b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang memcpy((void *)aligned_msg->payload, payload, payload_size); 3183e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 319d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang status = do_hypercall(HVCALL_POST_MESSAGE, aligned_msg, NULL) 320d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang & 0xFFFF; 3213e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3220831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman kfree((void *)addr); 3233e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3243e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen return status; 3253e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 3263e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3273e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3283e18951955797872558dad615851a4ca63b2770eHank Janssen/* 329d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_signal_event - 330d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * Signal an event on the specified connection using the hypervisor event IPC. 3310831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * 3320831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * This involves a hypercall. 3330831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 334d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangu16 hv_signal_event(void) 3353e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 336034469e6338b8d683419e3ee7f2543419dd5b574Greg Kroah-Hartman u16 status; 3373e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 338d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang status = do_hypercall(HVCALL_SIGNAL_EVENT, 3396a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param, 3400831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman NULL) & 0xFFFF; 3413e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen return status; 3423e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 3433e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3443e18951955797872558dad615851a4ca63b2770eHank Janssen/* 345d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_synic_init - Initialize the Synthethic Interrupt Controller. 3460831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * 3470831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * If it is already initialized by another entity (ie x2v shim), we need to 3480831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * retrieve the initialized message and event pages. Otherwise, we create and 3490831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * initialize the message and event pages. 3500831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 351d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangvoid hv_synic_init(void *irqarg) 3523e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 3530831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman u64 version; 354eacb1b4d24c2a8b7c1d73bb72e04920980ec8a4fGreg Kroah-Hartman union hv_synic_simp simp; 355eacb1b4d24c2a8b7c1d73bb72e04920980ec8a4fGreg Kroah-Hartman union hv_synic_siefp siefp; 356b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang union hv_synic_sint shared_sint; 357eacb1b4d24c2a8b7c1d73bb72e04920980ec8a4fGreg Kroah-Hartman union hv_synic_scontrol sctrl; 358a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 359b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 irq_vector = *((u32 *)(irqarg)); 3607692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman int cpu = smp_processor_id(); 3613e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3626a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (!hv_context.hypercall_page) 3637692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman return; 3643e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 365454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton /* Check the version */ 366a51ed7d65d62aa5ad8d364aa76af30328c26263fGreg Kroah-Hartman rdmsrl(HV_X64_MSR_SVERSION, version); 3673e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3686a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.synic_message_page[cpu] = 3696a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang (void *)get_zeroed_page(GFP_ATOMIC); 3703e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3716a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (hv_context.synic_message_page[cpu] == NULL) { 372a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen DPRINT_ERR(VMBUS, 373a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen "unable to allocate SYNIC message page!!"); 374a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen goto Cleanup; 375a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen } 3763e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3776a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.synic_event_page[cpu] = 3786a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang (void *)get_zeroed_page(GFP_ATOMIC); 3793e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3806a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (hv_context.synic_event_page[cpu] == NULL) { 381a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen DPRINT_ERR(VMBUS, 382a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen "unable to allocate SYNIC event page!!"); 383a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen goto Cleanup; 384a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen } 3853e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 386a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen /* Setup the Synic's message page */ 387f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang rdmsrl(HV_X64_MSR_SIMP, simp.as_uint64); 388f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang simp.simp_enabled = 1; 3896a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang simp.base_simp_gpa = virt_to_phys(hv_context.synic_message_page[cpu]) 390a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen >> PAGE_SHIFT; 3913e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 392f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang wrmsrl(HV_X64_MSR_SIMP, simp.as_uint64); 3933e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 394a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen /* Setup the Synic's event page */ 395f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang rdmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); 396f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang siefp.siefp_enabled = 1; 3976a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang siefp.base_siefp_gpa = virt_to_phys(hv_context.synic_event_page[cpu]) 398a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen >> PAGE_SHIFT; 399a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 400f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang wrmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); 4010831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman 4020831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman /* Setup the interception SINT. */ 403a51ed7d65d62aa5ad8d364aa76af30328c26263fGreg Kroah-Hartman /* wrmsrl((HV_X64_MSR_SINT0 + HV_SYNIC_INTERCEPTION_SINT_INDEX), */ 404f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang /* interceptionSint.as_uint64); */ 405454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton 4060831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman /* Setup the shared SINT. */ 407b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang rdmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); 4083e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 409b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang shared_sint.as_uint64 = 0; 410b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang shared_sint.vector = irq_vector; /* HV_SHARED_SINT_IDT_VECTOR + 0x20; */ 411b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang shared_sint.masked = false; 412b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang shared_sint.auto_eoi = true; 4133e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 414b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); 4153e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 416454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton /* Enable the global synic bit */ 417f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang rdmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64); 418f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang sctrl.enable = 1; 4193e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 420f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang wrmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64); 4213e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 4226a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.synic_initialized = true; 4237692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman return; 4243e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 4253e7ee4902fe6996048f03433dd111426db3cfa92Hank JanssenCleanup: 4266a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (hv_context.synic_event_page[cpu]) 427df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan free_page((unsigned long)hv_context.synic_event_page[cpu]); 4283e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 4296a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (hv_context.synic_message_page[cpu]) 430df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan free_page((unsigned long)hv_context.synic_message_page[cpu]); 4317692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman return; 4323e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 4333e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 4343e18951955797872558dad615851a4ca63b2770eHank Janssen/* 435d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_synic_cleanup - Cleanup routine for hv_synic_init(). 4360831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 437d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangvoid hv_synic_cleanup(void *arg) 4383e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 439b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang union hv_synic_sint shared_sint; 440eacb1b4d24c2a8b7c1d73bb72e04920980ec8a4fGreg Kroah-Hartman union hv_synic_simp simp; 441eacb1b4d24c2a8b7c1d73bb72e04920980ec8a4fGreg Kroah-Hartman union hv_synic_siefp siefp; 4427692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman int cpu = smp_processor_id(); 4433e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 4446a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (!hv_context.synic_initialized) 4453e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen return; 4463e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 447b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang rdmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); 4483e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 449b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang shared_sint.masked = 1; 4503e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 4517692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman /* Need to correctly cleanup in the case of SMP!!! */ 452454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton /* Disable the interrupt */ 453b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); 4543e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 455f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang rdmsrl(HV_X64_MSR_SIMP, simp.as_uint64); 456f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang simp.simp_enabled = 0; 457f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang simp.base_simp_gpa = 0; 4583e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 459f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang wrmsrl(HV_X64_MSR_SIMP, simp.as_uint64); 4603e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 461f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang rdmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); 462f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang siefp.siefp_enabled = 0; 463f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang siefp.base_siefp_gpa = 0; 4643e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 465f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang wrmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); 4663e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 467df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan free_page((unsigned long)hv_context.synic_message_page[cpu]); 468df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan free_page((unsigned long)hv_context.synic_event_page[cpu]); 4693e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 470