hv.c revision df3493e0b3ba72f9b6192a91b24197cac41ce557
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> 264983b39a0687b00688478e6748b979a02934b234Greg Kroah-Hartman#include "osd.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 830831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman 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)); 960831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman 97b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang max_leaf = eax; 980831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman 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)); 1100831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman 111b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang if (max_leaf >= HVCPUID_VERSION) { 1120831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman eax = 0; 1130831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ebx = 0; 1140831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ecx = 0; 1150831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman edx = 0; 116f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang op = HVCPUID_VERSION; 1170831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman cpuid(op, &eax, &ebx, &ecx, &edx); 1180831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman DPRINT_INFO(VMBUS, "OS Build:%d-%d.%d-%d-%d.%d",\ 1190831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman eax, 1200831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ebx >> 16, 1210831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ebx & 0xFFFF, 1220831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ecx, 1230831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman edx >> 24, 1240831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman edx & 0xFFFFFF); 1250831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman } 126b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang return max_leaf; 1270831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman} 1283e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 1293e18951955797872558dad615851a4ca63b2770eHank Janssen/* 130d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * do_hypercall- Invoke the specified hypercall 1310831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 132d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangstatic u64 do_hypercall(u64 control, void *input, void *output) 1333e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 134530cf2070be30831a371b6c7181d15e5976b6fc7Greg Kroah-Hartman#ifdef CONFIG_X86_64 135b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u64 hv_status = 0; 136b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u64 input_address = (input) ? virt_to_phys(input) : 0; 137b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u64 output_address = (output) ? virt_to_phys(output) : 0; 138b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang volatile void *hypercall_page = hv_context.hypercall_page; 1393e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 1400831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman DPRINT_DBG(VMBUS, "Hypercall <control %llx input phys %llx virt %p " 1410831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman "output phys %llx virt %p hypercall %p>", 142b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang control, input_address, input, 143b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang output_address, output, hypercall_page); 1443e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 145b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang __asm__ __volatile__("mov %0, %%r8" : : "r" (output_address) : "r8"); 146b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang __asm__ __volatile__("call *%3" : "=a" (hv_status) : 147b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "c" (control), "d" (input_address), 148b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "m" (hypercall_page)); 1493e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 150b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang DPRINT_DBG(VMBUS, "Hypercall <return %llx>", hv_status); 1513e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 152b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang return hv_status; 1533e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 1543e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen#else 1553e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 156b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 control_hi = control >> 32; 157b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 control_lo = control & 0xFFFFFFFF; 158b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 hv_status_hi = 1; 159b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 hv_status_lo = 1; 160b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u64 input_address = (input) ? virt_to_phys(input) : 0; 161b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 input_address_hi = input_address >> 32; 162b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 input_address_lo = input_address & 0xFFFFFFFF; 163b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u64 output_address = (output) ? virt_to_phys(output) : 0; 164b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 output_address_hi = output_address >> 32; 165b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 output_address_lo = output_address & 0xFFFFFFFF; 166b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang volatile void *hypercall_page = hv_context.hypercall_page; 1673e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 1680831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman DPRINT_DBG(VMBUS, "Hypercall <control %llx input %p output %p>", 169b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang control, input, output); 1703e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 171b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang __asm__ __volatile__ ("call *%8" : "=d"(hv_status_hi), 172b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "=a"(hv_status_lo) : "d" (control_hi), 173b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "a" (control_lo), "b" (input_address_hi), 174b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "c" (input_address_lo), "D"(output_address_hi), 175b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "S"(output_address_lo), "m" (hypercall_page)); 1763e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 1770831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman DPRINT_DBG(VMBUS, "Hypercall <return %llx>", 178b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hv_status_lo | ((u64)hv_status_hi << 32)); 1793e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 180b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang return hv_status_lo | ((u64)hv_status_hi << 32); 1810831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman#endif /* !x86_64 */ 1823e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 1833e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 1843e18951955797872558dad615851a4ca63b2770eHank Janssen/* 185d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_init - Main initialization routine. 1860831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * 1870831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * This routine must be called before any other routines in here are called 1880831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 189d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangint hv_init(void) 1903e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 1910831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman int ret = 0; 192b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang int max_leaf; 193b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang union hv_x64_msr_hypercall_contents hypercall_msr; 194b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang void *virtaddr = NULL; 1953e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 1966a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang memset(hv_context.synic_event_page, 0, sizeof(void *) * MAX_NUM_CPUS); 1976a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang memset(hv_context.synic_message_page, 0, 1986a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang sizeof(void *) * MAX_NUM_CPUS); 1993e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 200d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang if (!query_hypervisor_presence()) { 2013e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen DPRINT_ERR(VMBUS, "No Windows hypervisor detected!!"); 2023e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen goto Cleanup; 2033e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen } 2043e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2050831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman DPRINT_INFO(VMBUS, 2060831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman "Windows hypervisor detected! Retrieving more info..."); 2073e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 208d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang max_leaf = query_hypervisor_info(); 2090831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman /* HvQueryHypervisorFeatures(maxLeaf); */ 2103e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2110831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman /* 212a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen * We only support running on top of Hyper-V 2130831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 2146a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang rdmsrl(HV_X64_MSR_GUEST_OS_ID, hv_context.guestid); 215a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 2166a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (hv_context.guestid != 0) { 217a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen DPRINT_ERR(VMBUS, "Unknown guest id (0x%llx)!!", 2186a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.guestid); 219a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen goto Cleanup; 2203e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen } 2213e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 222a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen /* Write our OS info */ 223a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen wrmsrl(HV_X64_MSR_GUEST_OS_ID, HV_LINUX_GUEST_ID); 2246a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.guestid = HV_LINUX_GUEST_ID; 225a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 226454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton /* See if the hypercall page is already set */ 227b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); 2283e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 229a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen /* 230a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen * Allocate the hypercall page memory 231203df82d81a331e16caee4c2346cd382fcd820d6Haiyang Zhang * virtaddr = osd_page_alloc(1); 232a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen */ 233df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan#ifdef __x86_64__ 234df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan virtaddr = __vmalloc(PAGE_SIZE, GFP_KERNEL, PAGE_KERNEL_EXEC); 235df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan#else 236df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan virtaddr = __vmalloc(PAGE_SIZE, GFP_KERNEL, 237df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan __pgprot(__PAGE_KERNEL & (~_PAGE_NX))); 238df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan#endif 2393e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 240b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang if (!virtaddr) { 241a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen DPRINT_ERR(VMBUS, 242a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen "unable to allocate hypercall page!!"); 243a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen goto Cleanup; 244a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen } 2453e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 246b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hypercall_msr.enable = 1; 247a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 248b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hypercall_msr.guest_physical_address = vmalloc_to_pfn(virtaddr); 249b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); 250a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 251a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen /* Confirm that hypercall page did get setup. */ 252b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hypercall_msr.as_uint64 = 0; 253b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); 254a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 255b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang if (!hypercall_msr.enable) { 256a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen DPRINT_ERR(VMBUS, "unable to set hypercall page!!"); 2573e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen goto Cleanup; 2583e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen } 2593e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 260b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hv_context.hypercall_page = virtaddr; 261a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 2622701f686d7083d516c2f937031515b032d71f563Greg Kroah-Hartman DPRINT_INFO(VMBUS, "Hypercall page VA=%p, PA=0x%0llx", 2636a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.hypercall_page, 264b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang (u64)hypercall_msr.guest_physical_address << PAGE_SHIFT); 2653e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 266454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton /* Setup the global signal event param for the signal event hypercall */ 2676a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_buffer = 2680831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman kmalloc(sizeof(struct hv_input_signal_event_buffer), 2690831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman GFP_KERNEL); 2706a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (!hv_context.signal_event_buffer) 2713e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen goto Cleanup; 2723e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2736a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param = 2740831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman (struct hv_input_signal_event *) 2757350968193f9b94c4a4b7d14d7a44333a322c5d7Uwe Kleine-König (ALIGN((unsigned long) 2766a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_buffer, 2770831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman HV_HYPERCALL_PARAM_ALIGN)); 2786a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param->connectionid.asu32 = 0; 2796a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param->connectionid.u.id = 2800831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman VMBUS_EVENT_CONNECTION_ID; 2816a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param->flag_number = 0; 2826a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param->rsvdz = 0; 2833e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2840831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman return ret; 2853e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2863e7ee4902fe6996048f03433dd111426db3cfa92Hank JanssenCleanup: 287b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang if (virtaddr) { 288b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang if (hypercall_msr.enable) { 289b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hypercall_msr.as_uint64 = 0; 290b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); 2913e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen } 2923e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 293b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang vfree(virtaddr); 2943e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen } 2953e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen ret = -1; 2963e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen return ret; 2973e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 2983e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2993e18951955797872558dad615851a4ca63b2770eHank Janssen/* 300d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_cleanup - Cleanup routine. 3010831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * 3020831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * This routine is called normally during driver unloading or exiting. 3030831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 304d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangvoid hv_cleanup(void) 3053e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 306b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang union hv_x64_msr_hypercall_contents hypercall_msr; 3073e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3086a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang kfree(hv_context.signal_event_buffer); 3096a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_buffer = NULL; 3106a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param = NULL; 3113e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3126a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (hv_context.hypercall_page) { 313b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hypercall_msr.as_uint64 = 0; 314b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); 3156a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang vfree(hv_context.hypercall_page); 3166a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.hypercall_page = NULL; 3173e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen } 3183e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 3193e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3203e18951955797872558dad615851a4ca63b2770eHank Janssen/* 321d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_post_message - Post a message using the hypervisor message IPC. 3220831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * 3230831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * This involves a hypercall. 3240831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 325d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangu16 hv_post_message(union hv_connection_id connection_id, 326b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang enum hv_message_type message_type, 327b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang void *payload, size_t payload_size) 3283e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 329b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang struct aligned_input { 3300831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman u64 alignment8; 331cba4decdd3dcd224b17631572456951aace0a27eGreg Kroah-Hartman struct hv_input_post_message msg; 3323e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen }; 3333e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 334b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang struct hv_input_post_message *aligned_msg; 335034469e6338b8d683419e3ee7f2543419dd5b574Greg Kroah-Hartman u16 status; 336c4b0bc94828a86cfb6a975b0e0d92dc1cd389565Greg Kroah-Hartman unsigned long addr; 3373e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 338b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang if (payload_size > HV_MESSAGE_PAYLOAD_BYTE_COUNT) 3393e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen return -1; 3403e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 341b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang addr = (unsigned long)kmalloc(sizeof(struct aligned_input), GFP_ATOMIC); 3423e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen if (!addr) 3433e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen return -1; 3443e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 345b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang aligned_msg = (struct hv_input_post_message *) 3467350968193f9b94c4a4b7d14d7a44333a322c5d7Uwe Kleine-König (ALIGN(addr, HV_HYPERCALL_PARAM_ALIGN)); 3473e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 348b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang aligned_msg->connectionid = connection_id; 349b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang aligned_msg->message_type = message_type; 350b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang aligned_msg->payload_size = payload_size; 351b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang memcpy((void *)aligned_msg->payload, payload, payload_size); 3523e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 353d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang status = do_hypercall(HVCALL_POST_MESSAGE, aligned_msg, NULL) 354d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang & 0xFFFF; 3553e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3560831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman kfree((void *)addr); 3573e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3583e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen return status; 3593e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 3603e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3613e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3623e18951955797872558dad615851a4ca63b2770eHank Janssen/* 363d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_signal_event - 364d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * Signal an event on the specified connection using the hypervisor event IPC. 3650831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * 3660831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * This involves a hypercall. 3670831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 368d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangu16 hv_signal_event(void) 3693e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 370034469e6338b8d683419e3ee7f2543419dd5b574Greg Kroah-Hartman u16 status; 3713e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 372d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang status = do_hypercall(HVCALL_SIGNAL_EVENT, 3736a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param, 3740831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman NULL) & 0xFFFF; 3753e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen return status; 3763e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 3773e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3783e18951955797872558dad615851a4ca63b2770eHank Janssen/* 379d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_synic_init - Initialize the Synthethic Interrupt Controller. 3800831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * 3810831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * If it is already initialized by another entity (ie x2v shim), we need to 3820831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * retrieve the initialized message and event pages. Otherwise, we create and 3830831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * initialize the message and event pages. 3840831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 385d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangvoid hv_synic_init(void *irqarg) 3863e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 3870831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman u64 version; 388eacb1b4d24c2a8b7c1d73bb72e04920980ec8a4fGreg Kroah-Hartman union hv_synic_simp simp; 389eacb1b4d24c2a8b7c1d73bb72e04920980ec8a4fGreg Kroah-Hartman union hv_synic_siefp siefp; 390b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang union hv_synic_sint shared_sint; 391eacb1b4d24c2a8b7c1d73bb72e04920980ec8a4fGreg Kroah-Hartman union hv_synic_scontrol sctrl; 392a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 393b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 irq_vector = *((u32 *)(irqarg)); 3947692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman int cpu = smp_processor_id(); 3953e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3966a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (!hv_context.hypercall_page) 3977692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman return; 3983e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 399454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton /* Check the version */ 400a51ed7d65d62aa5ad8d364aa76af30328c26263fGreg Kroah-Hartman rdmsrl(HV_X64_MSR_SVERSION, version); 4013e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 4023e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen DPRINT_INFO(VMBUS, "SynIC version: %llx", version); 4033e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 4046a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.synic_message_page[cpu] = 4056a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang (void *)get_zeroed_page(GFP_ATOMIC); 4063e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 4076a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (hv_context.synic_message_page[cpu] == NULL) { 408a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen DPRINT_ERR(VMBUS, 409a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen "unable to allocate SYNIC message page!!"); 410a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen goto Cleanup; 411a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen } 4123e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 4136a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.synic_event_page[cpu] = 4146a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang (void *)get_zeroed_page(GFP_ATOMIC); 4153e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 4166a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (hv_context.synic_event_page[cpu] == NULL) { 417a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen DPRINT_ERR(VMBUS, 418a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen "unable to allocate SYNIC event page!!"); 419a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen goto Cleanup; 420a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen } 4213e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 422a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen /* Setup the Synic's message page */ 423f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang rdmsrl(HV_X64_MSR_SIMP, simp.as_uint64); 424f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang simp.simp_enabled = 1; 4256a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang simp.base_simp_gpa = virt_to_phys(hv_context.synic_message_page[cpu]) 426a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen >> PAGE_SHIFT; 4273e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 428f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang DPRINT_DBG(VMBUS, "HV_X64_MSR_SIMP msr set to: %llx", simp.as_uint64); 4293e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 430f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang wrmsrl(HV_X64_MSR_SIMP, simp.as_uint64); 4313e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 432a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen /* Setup the Synic's event page */ 433f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang rdmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); 434f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang siefp.siefp_enabled = 1; 4356a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang siefp.base_siefp_gpa = virt_to_phys(hv_context.synic_event_page[cpu]) 436a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen >> PAGE_SHIFT; 437a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 438f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang DPRINT_DBG(VMBUS, "HV_X64_MSR_SIEFP msr set to: %llx", siefp.as_uint64); 439a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 440f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang wrmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); 4410831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman 4420831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman /* Setup the interception SINT. */ 443a51ed7d65d62aa5ad8d364aa76af30328c26263fGreg Kroah-Hartman /* wrmsrl((HV_X64_MSR_SINT0 + HV_SYNIC_INTERCEPTION_SINT_INDEX), */ 444f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang /* interceptionSint.as_uint64); */ 445454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton 4460831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman /* Setup the shared SINT. */ 447b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang rdmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); 4483e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 449b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang shared_sint.as_uint64 = 0; 450b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang shared_sint.vector = irq_vector; /* HV_SHARED_SINT_IDT_VECTOR + 0x20; */ 451b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang shared_sint.masked = false; 452b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang shared_sint.auto_eoi = true; 4533e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 4540831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman DPRINT_DBG(VMBUS, "HV_X64_MSR_SINT1 msr set to: %llx", 455b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang shared_sint.as_uint64); 4563e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 457b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); 4583e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 459454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton /* Enable the global synic bit */ 460f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang rdmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64); 461f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang sctrl.enable = 1; 4623e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 463f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang wrmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64); 4643e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 4656a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.synic_initialized = true; 4667692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman return; 4673e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 4683e7ee4902fe6996048f03433dd111426db3cfa92Hank JanssenCleanup: 4696a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (hv_context.synic_event_page[cpu]) 470df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan free_page((unsigned long)hv_context.synic_event_page[cpu]); 4713e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 4726a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (hv_context.synic_message_page[cpu]) 473df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan free_page((unsigned long)hv_context.synic_message_page[cpu]); 4747692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman return; 4753e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 4763e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 4773e18951955797872558dad615851a4ca63b2770eHank Janssen/* 478d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_synic_cleanup - Cleanup routine for hv_synic_init(). 4790831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 480d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangvoid hv_synic_cleanup(void *arg) 4813e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 482b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang union hv_synic_sint shared_sint; 483eacb1b4d24c2a8b7c1d73bb72e04920980ec8a4fGreg Kroah-Hartman union hv_synic_simp simp; 484eacb1b4d24c2a8b7c1d73bb72e04920980ec8a4fGreg Kroah-Hartman union hv_synic_siefp siefp; 4857692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman int cpu = smp_processor_id(); 4863e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 4876a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (!hv_context.synic_initialized) 4883e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen return; 4893e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 490b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang rdmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); 4913e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 492b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang shared_sint.masked = 1; 4933e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 4947692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman /* Need to correctly cleanup in the case of SMP!!! */ 495454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton /* Disable the interrupt */ 496b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); 4973e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 498f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang rdmsrl(HV_X64_MSR_SIMP, simp.as_uint64); 499f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang simp.simp_enabled = 0; 500f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang simp.base_simp_gpa = 0; 5013e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 502f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang wrmsrl(HV_X64_MSR_SIMP, simp.as_uint64); 5033e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 504f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang rdmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); 505f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang siefp.siefp_enabled = 0; 506f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang siefp.base_siefp_gpa = 0; 5073e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 508f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang wrmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); 5093e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 510df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan free_page((unsigned long)hv_context.synic_message_page[cpu]); 511df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan free_page((unsigned long)hv_context.synic_event_page[cpu]); 5123e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 513