hv.c revision 46a971913611a23478283931460a95be962ce329
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 */ 220a46618d58c90f93e8b8e9a18062d1691b70297eHank Janssen#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 230a46618d58c90f93e8b8e9a18062d1691b70297eHank Janssen 24a0086dc512ba6c2161dcf48195daf177ad0c3615Greg Kroah-Hartman#include <linux/kernel.h> 25a0086dc512ba6c2161dcf48195daf177ad0c3615Greg Kroah-Hartman#include <linux/mm.h> 265a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 27b7c947f04888b8bb2dc79832c10ede73c5b8dae2Bill Pemberton#include <linux/vmalloc.h> 2846a971913611a23478283931460a95be962ce329Greg Kroah-Hartman#include <linux/hyperv.h> 293f335ea2131b14bca2333b4316c8d4dd737e30dbK. Y. Srinivasan 300f2a6619eeef158d11832436ce151987f18cb08dK. Y. Srinivasan#include "hyperv_vmbus.h" 313e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 32454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton/* The one and only */ 336a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhangstruct hv_context hv_context = { 346a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang .synic_initialized = false, 356a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang .hypercall_page = NULL, 366a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang .signal_event_param = NULL, 376a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang .signal_event_buffer = NULL, 383e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen}; 393e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 403e18951955797872558dad615851a4ca63b2770eHank Janssen/* 41d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * query_hypervisor_presence 4225985edcedea6396277003854657b5f3cb31a628Lucas De Marchi * - Query the cpuid for presence of windows hypervisor 430831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 44d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangstatic int query_hypervisor_presence(void) 453e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 460831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int eax; 470831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int ebx; 480831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int ecx; 490831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int edx; 500831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int op; 513e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 52454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton eax = 0; 53454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton ebx = 0; 54454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton ecx = 0; 55454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton edx = 0; 56f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang op = HVCPUID_VERSION_FEATURES; 57f931a70c370cc826191a51a79500b34cd592b25bGreg Kroah-Hartman cpuid(op, &eax, &ebx, &ecx, &edx); 580831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman 590831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman return ecx & HV_PRESENT_BIT; 603e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 613e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 623e18951955797872558dad615851a4ca63b2770eHank Janssen/* 63d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * query_hypervisor_info - Get version info of the windows hypervisor 640831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 65d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangstatic int query_hypervisor_info(void) 660831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman{ 670831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int eax; 680831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int ebx; 690831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int ecx; 700831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int edx; 71b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang unsigned int max_leaf; 720831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int op; 733e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 740831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman /* 750831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * Its assumed that this is called after confirming that Viridian 760831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * is present. Query id and revision. 770831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 780831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman eax = 0; 790831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ebx = 0; 800831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ecx = 0; 810831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman edx = 0; 82f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang op = HVCPUID_VENDOR_MAXFUNCTION; 830831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman cpuid(op, &eax, &ebx, &ecx, &edx); 843e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 85b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang max_leaf = eax; 860831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman 87b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang if (max_leaf >= HVCPUID_VERSION) { 880831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman eax = 0; 890831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ebx = 0; 900831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ecx = 0; 910831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman edx = 0; 92f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang op = HVCPUID_VERSION; 930831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman cpuid(op, &eax, &ebx, &ecx, &edx); 940a46618d58c90f93e8b8e9a18062d1691b70297eHank Janssen pr_info("Hyper-V Host OS Build:%d-%d.%d-%d-%d.%d\n", 950831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman eax, 960831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ebx >> 16, 970831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ebx & 0xFFFF, 980831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ecx, 990831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman edx >> 24, 1000831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman edx & 0xFFFFFF); 1010831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman } 102b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang return max_leaf; 1030831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman} 1043e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 1053e18951955797872558dad615851a4ca63b2770eHank Janssen/* 106d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * do_hypercall- Invoke the specified hypercall 1070831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 108d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangstatic u64 do_hypercall(u64 control, void *input, void *output) 1093e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 110530cf2070be30831a371b6c7181d15e5976b6fc7Greg Kroah-Hartman#ifdef CONFIG_X86_64 111b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u64 hv_status = 0; 112b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u64 input_address = (input) ? virt_to_phys(input) : 0; 113b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u64 output_address = (output) ? virt_to_phys(output) : 0; 114dec317fd6accfdba4daff13aa4d9f5abde02b347K. Y. Srinivasan void *hypercall_page = hv_context.hypercall_page; 1153e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 116b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang __asm__ __volatile__("mov %0, %%r8" : : "r" (output_address) : "r8"); 117b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang __asm__ __volatile__("call *%3" : "=a" (hv_status) : 118b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "c" (control), "d" (input_address), 119b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "m" (hypercall_page)); 1203e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 121b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang return hv_status; 1223e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 1233e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen#else 1243e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 125b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 control_hi = control >> 32; 126b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 control_lo = control & 0xFFFFFFFF; 127b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 hv_status_hi = 1; 128b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 hv_status_lo = 1; 129b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u64 input_address = (input) ? virt_to_phys(input) : 0; 130b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 input_address_hi = input_address >> 32; 131b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 input_address_lo = input_address & 0xFFFFFFFF; 132b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u64 output_address = (output) ? virt_to_phys(output) : 0; 133b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 output_address_hi = output_address >> 32; 134b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 output_address_lo = output_address & 0xFFFFFFFF; 135dec317fd6accfdba4daff13aa4d9f5abde02b347K. Y. Srinivasan void *hypercall_page = hv_context.hypercall_page; 1363e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 137b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang __asm__ __volatile__ ("call *%8" : "=d"(hv_status_hi), 138b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "=a"(hv_status_lo) : "d" (control_hi), 139b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "a" (control_lo), "b" (input_address_hi), 140b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "c" (input_address_lo), "D"(output_address_hi), 141b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "S"(output_address_lo), "m" (hypercall_page)); 1423e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 143b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang return hv_status_lo | ((u64)hv_status_hi << 32); 1440831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman#endif /* !x86_64 */ 1453e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 1463e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 1473e18951955797872558dad615851a4ca63b2770eHank Janssen/* 148d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_init - Main initialization routine. 1490831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * 1500831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * This routine must be called before any other routines in here are called 1510831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 152d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangint hv_init(void) 1533e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 154b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang int max_leaf; 155b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang union hv_x64_msr_hypercall_contents hypercall_msr; 156b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang void *virtaddr = NULL; 1573e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 1586a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang memset(hv_context.synic_event_page, 0, sizeof(void *) * MAX_NUM_CPUS); 1596a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang memset(hv_context.synic_message_page, 0, 1606a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang sizeof(void *) * MAX_NUM_CPUS); 1613e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 16298e087022b611c6f748c74d952193ccf69280f52Hank Janssen if (!query_hypervisor_presence()) 16344939d37cc03af996d93b9d15385ac13de2bd627K. Y. Srinivasan goto cleanup; 1643e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 165d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang max_leaf = query_hypervisor_info(); 1663e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 1676a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang rdmsrl(HV_X64_MSR_GUEST_OS_ID, hv_context.guestid); 168a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 16998e087022b611c6f748c74d952193ccf69280f52Hank Janssen if (hv_context.guestid != 0) 17044939d37cc03af996d93b9d15385ac13de2bd627K. Y. Srinivasan goto cleanup; 1713e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 172a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen /* Write our OS info */ 173a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen wrmsrl(HV_X64_MSR_GUEST_OS_ID, HV_LINUX_GUEST_ID); 1746a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.guestid = HV_LINUX_GUEST_ID; 175a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 176454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton /* See if the hypercall page is already set */ 177b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); 1783e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 179df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan virtaddr = __vmalloc(PAGE_SIZE, GFP_KERNEL, PAGE_KERNEL_EXEC); 1803e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 18198e087022b611c6f748c74d952193ccf69280f52Hank Janssen if (!virtaddr) 18244939d37cc03af996d93b9d15385ac13de2bd627K. Y. Srinivasan goto cleanup; 1833e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 184b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hypercall_msr.enable = 1; 185a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 186b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hypercall_msr.guest_physical_address = vmalloc_to_pfn(virtaddr); 187b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); 188a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 189a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen /* Confirm that hypercall page did get setup. */ 190b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hypercall_msr.as_uint64 = 0; 191b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); 192a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 19398e087022b611c6f748c74d952193ccf69280f52Hank Janssen if (!hypercall_msr.enable) 19444939d37cc03af996d93b9d15385ac13de2bd627K. Y. Srinivasan goto cleanup; 1953e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 196b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hv_context.hypercall_page = virtaddr; 197a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 198454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton /* Setup the global signal event param for the signal event hypercall */ 1996a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_buffer = 2000831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman kmalloc(sizeof(struct hv_input_signal_event_buffer), 2010831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman GFP_KERNEL); 2026a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (!hv_context.signal_event_buffer) 20344939d37cc03af996d93b9d15385ac13de2bd627K. Y. Srinivasan goto cleanup; 2043e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2056a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param = 2060831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman (struct hv_input_signal_event *) 2077350968193f9b94c4a4b7d14d7a44333a322c5d7Uwe Kleine-König (ALIGN((unsigned long) 2086a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_buffer, 2090831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman HV_HYPERCALL_PARAM_ALIGN)); 2106a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param->connectionid.asu32 = 0; 2116a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param->connectionid.u.id = 2120831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman VMBUS_EVENT_CONNECTION_ID; 2136a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param->flag_number = 0; 2146a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param->rsvdz = 0; 2153e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2165433e00334d3e20f8bff70845c7f44e00cdf2d14K. Y. Srinivasan return 0; 2173e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 21844939d37cc03af996d93b9d15385ac13de2bd627K. Y. Srinivasancleanup: 219b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang if (virtaddr) { 220b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang if (hypercall_msr.enable) { 221b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hypercall_msr.as_uint64 = 0; 222b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); 2233e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen } 2243e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 225b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang vfree(virtaddr); 2263e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen } 2275433e00334d3e20f8bff70845c7f44e00cdf2d14K. Y. Srinivasan 2285433e00334d3e20f8bff70845c7f44e00cdf2d14K. Y. Srinivasan return -ENOTSUPP; 2293e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 2303e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2313e18951955797872558dad615851a4ca63b2770eHank Janssen/* 232d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_cleanup - Cleanup routine. 2330831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * 2340831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * This routine is called normally during driver unloading or exiting. 2350831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 236d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangvoid hv_cleanup(void) 2373e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 238b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang union hv_x64_msr_hypercall_contents hypercall_msr; 2393e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2406a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang kfree(hv_context.signal_event_buffer); 2416a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_buffer = NULL; 2426a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param = NULL; 2433e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2446a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (hv_context.hypercall_page) { 245b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hypercall_msr.as_uint64 = 0; 246b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); 2476a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang vfree(hv_context.hypercall_page); 2486a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.hypercall_page = NULL; 2493e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen } 2503e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 2513e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2523e18951955797872558dad615851a4ca63b2770eHank Janssen/* 253d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_post_message - Post a message using the hypervisor message IPC. 2540831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * 2550831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * This involves a hypercall. 2560831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 257d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangu16 hv_post_message(union hv_connection_id connection_id, 258b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang enum hv_message_type message_type, 259b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang void *payload, size_t payload_size) 2603e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 261b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang struct aligned_input { 2620831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman u64 alignment8; 263cba4decdd3dcd224b17631572456951aace0a27eGreg Kroah-Hartman struct hv_input_post_message msg; 2643e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen }; 2653e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 266b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang struct hv_input_post_message *aligned_msg; 267034469e6338b8d683419e3ee7f2543419dd5b574Greg Kroah-Hartman u16 status; 268c4b0bc94828a86cfb6a975b0e0d92dc1cd389565Greg Kroah-Hartman unsigned long addr; 2693e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 270b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang if (payload_size > HV_MESSAGE_PAYLOAD_BYTE_COUNT) 27139594abcd47da2f587804dff2fedbd7ada4670d0K. Y. Srinivasan return -EMSGSIZE; 2723e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 273b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang addr = (unsigned long)kmalloc(sizeof(struct aligned_input), GFP_ATOMIC); 2743e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen if (!addr) 27539594abcd47da2f587804dff2fedbd7ada4670d0K. Y. Srinivasan return -ENOMEM; 2763e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 277b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang aligned_msg = (struct hv_input_post_message *) 2787350968193f9b94c4a4b7d14d7a44333a322c5d7Uwe Kleine-König (ALIGN(addr, HV_HYPERCALL_PARAM_ALIGN)); 2793e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 280b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang aligned_msg->connectionid = connection_id; 281b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang aligned_msg->message_type = message_type; 282b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang aligned_msg->payload_size = payload_size; 283b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang memcpy((void *)aligned_msg->payload, payload, payload_size); 2843e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 285d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang status = do_hypercall(HVCALL_POST_MESSAGE, aligned_msg, NULL) 286d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang & 0xFFFF; 2873e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2880831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman kfree((void *)addr); 2893e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2903e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen return status; 2913e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 2923e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2933e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2943e18951955797872558dad615851a4ca63b2770eHank Janssen/* 295d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_signal_event - 296d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * Signal an event on the specified connection using the hypervisor event IPC. 2970831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * 2980831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * This involves a hypercall. 2990831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 300d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangu16 hv_signal_event(void) 3013e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 302034469e6338b8d683419e3ee7f2543419dd5b574Greg Kroah-Hartman u16 status; 3033e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 304d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang status = do_hypercall(HVCALL_SIGNAL_EVENT, 3056a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param, 3060831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman NULL) & 0xFFFF; 3073e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen return status; 3083e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 3093e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3103e18951955797872558dad615851a4ca63b2770eHank Janssen/* 311d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_synic_init - Initialize the Synthethic Interrupt Controller. 3120831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * 3130831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * If it is already initialized by another entity (ie x2v shim), we need to 3140831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * retrieve the initialized message and event pages. Otherwise, we create and 3150831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * initialize the message and event pages. 3160831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 317d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangvoid hv_synic_init(void *irqarg) 3183e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 3190831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman u64 version; 320eacb1b4d24c2a8b7c1d73bb72e04920980ec8a4fGreg Kroah-Hartman union hv_synic_simp simp; 321eacb1b4d24c2a8b7c1d73bb72e04920980ec8a4fGreg Kroah-Hartman union hv_synic_siefp siefp; 322b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang union hv_synic_sint shared_sint; 323eacb1b4d24c2a8b7c1d73bb72e04920980ec8a4fGreg Kroah-Hartman union hv_synic_scontrol sctrl; 324a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 325b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 irq_vector = *((u32 *)(irqarg)); 3267692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman int cpu = smp_processor_id(); 3273e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3286a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (!hv_context.hypercall_page) 3297692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman return; 3303e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 331454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton /* Check the version */ 332a51ed7d65d62aa5ad8d364aa76af30328c26263fGreg Kroah-Hartman rdmsrl(HV_X64_MSR_SVERSION, version); 3333e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3346a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.synic_message_page[cpu] = 3356a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang (void *)get_zeroed_page(GFP_ATOMIC); 3363e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3376a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (hv_context.synic_message_page[cpu] == NULL) { 3380a46618d58c90f93e8b8e9a18062d1691b70297eHank Janssen pr_err("Unable to allocate SYNIC message page\n"); 33944939d37cc03af996d93b9d15385ac13de2bd627K. Y. Srinivasan goto cleanup; 340a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen } 3413e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3426a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.synic_event_page[cpu] = 3436a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang (void *)get_zeroed_page(GFP_ATOMIC); 3443e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3456a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (hv_context.synic_event_page[cpu] == NULL) { 3460a46618d58c90f93e8b8e9a18062d1691b70297eHank Janssen pr_err("Unable to allocate SYNIC event page\n"); 34744939d37cc03af996d93b9d15385ac13de2bd627K. Y. Srinivasan goto cleanup; 348a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen } 3493e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 350a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen /* Setup the Synic's message page */ 351f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang rdmsrl(HV_X64_MSR_SIMP, simp.as_uint64); 352f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang simp.simp_enabled = 1; 3536a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang simp.base_simp_gpa = virt_to_phys(hv_context.synic_message_page[cpu]) 354a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen >> PAGE_SHIFT; 3553e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 356f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang wrmsrl(HV_X64_MSR_SIMP, simp.as_uint64); 3573e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 358a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen /* Setup the Synic's event page */ 359f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang rdmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); 360f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang siefp.siefp_enabled = 1; 3616a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang siefp.base_siefp_gpa = virt_to_phys(hv_context.synic_event_page[cpu]) 362a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen >> PAGE_SHIFT; 363a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 364f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang wrmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); 3650831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman 3660831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman /* Setup the shared SINT. */ 367b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang rdmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); 3683e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 369b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang shared_sint.as_uint64 = 0; 370b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang shared_sint.vector = irq_vector; /* HV_SHARED_SINT_IDT_VECTOR + 0x20; */ 371b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang shared_sint.masked = false; 37293511baa06437785758be98ee7a7149c49c8e9c5K. Y. Srinivasan shared_sint.auto_eoi = false; 3733e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 374b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); 3753e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 376454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton /* Enable the global synic bit */ 377f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang rdmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64); 378f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang sctrl.enable = 1; 3793e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 380f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang wrmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64); 3813e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3826a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.synic_initialized = true; 3837692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman return; 3843e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 38544939d37cc03af996d93b9d15385ac13de2bd627K. Y. Srinivasancleanup: 3866a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (hv_context.synic_event_page[cpu]) 387df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan free_page((unsigned long)hv_context.synic_event_page[cpu]); 3883e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3896a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (hv_context.synic_message_page[cpu]) 390df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan free_page((unsigned long)hv_context.synic_message_page[cpu]); 3917692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman return; 3923e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 3933e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3943e18951955797872558dad615851a4ca63b2770eHank Janssen/* 395d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_synic_cleanup - Cleanup routine for hv_synic_init(). 3960831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 397d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangvoid hv_synic_cleanup(void *arg) 3983e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 399b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang union hv_synic_sint shared_sint; 400eacb1b4d24c2a8b7c1d73bb72e04920980ec8a4fGreg Kroah-Hartman union hv_synic_simp simp; 401eacb1b4d24c2a8b7c1d73bb72e04920980ec8a4fGreg Kroah-Hartman union hv_synic_siefp siefp; 4027692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman int cpu = smp_processor_id(); 4033e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 4046a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (!hv_context.synic_initialized) 4053e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen return; 4063e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 407b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang rdmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); 4083e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 409b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang shared_sint.masked = 1; 4103e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 4117692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman /* Need to correctly cleanup in the case of SMP!!! */ 412454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton /* Disable the interrupt */ 413b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); 4143e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 415f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang rdmsrl(HV_X64_MSR_SIMP, simp.as_uint64); 416f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang simp.simp_enabled = 0; 417f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang simp.base_simp_gpa = 0; 4183e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 419f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang wrmsrl(HV_X64_MSR_SIMP, simp.as_uint64); 4203e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 421f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang rdmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); 422f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang siefp.siefp_enabled = 0; 423f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang siefp.base_siefp_gpa = 0; 4243e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 425f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang wrmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); 4263e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 427df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan free_page((unsigned long)hv_context.synic_message_page[cpu]); 428df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan free_page((unsigned long)hv_context.synic_event_page[cpu]); 4293e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 430