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> 2983ba0c4f3f317270dae5597d8044b795d119914cK. Y. Srinivasan#include <linux/version.h> 30db11f12a11c9f04d504510e1cc20775209b0e509K. Y. Srinivasan#include <linux/interrupt.h> 31407dd1644302ea78fa5d740e67a1c09677aa18a4Greg Kroah-Hartman#include <asm/hyperv.h> 320f2a6619eeef158d11832436ce151987f18cb08dK. Y. Srinivasan#include "hyperv_vmbus.h" 333e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 34454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton/* The one and only */ 356a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhangstruct hv_context hv_context = { 366a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang .synic_initialized = false, 376a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang .hypercall_page = NULL, 383e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen}; 393e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 403e18951955797872558dad615851a4ca63b2770eHank Janssen/* 41d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * query_hypervisor_info - Get version info of the windows hypervisor 420831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 435fbebb2d2095e5c7d289d5f4ffecc2f2661c584aK. Y. Srinivasanunsigned int host_info_eax; 445fbebb2d2095e5c7d289d5f4ffecc2f2661c584aK. Y. Srinivasanunsigned int host_info_ebx; 455fbebb2d2095e5c7d289d5f4ffecc2f2661c584aK. Y. Srinivasanunsigned int host_info_ecx; 465fbebb2d2095e5c7d289d5f4ffecc2f2661c584aK. Y. Srinivasanunsigned int host_info_edx; 475fbebb2d2095e5c7d289d5f4ffecc2f2661c584aK. Y. Srinivasan 48d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangstatic int query_hypervisor_info(void) 490831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman{ 500831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int eax; 510831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int ebx; 520831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int ecx; 530831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int edx; 54b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang unsigned int max_leaf; 550831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int op; 563e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 570831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman /* 580831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * Its assumed that this is called after confirming that Viridian 590831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * is present. Query id and revision. 600831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 610831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman eax = 0; 620831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ebx = 0; 630831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ecx = 0; 640831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman edx = 0; 65f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang op = HVCPUID_VENDOR_MAXFUNCTION; 660831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman cpuid(op, &eax, &ebx, &ecx, &edx); 673e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 68b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang max_leaf = eax; 690831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman 70b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang if (max_leaf >= HVCPUID_VERSION) { 710831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman eax = 0; 720831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ebx = 0; 730831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ecx = 0; 740831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman edx = 0; 75f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang op = HVCPUID_VERSION; 760831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman cpuid(op, &eax, &ebx, &ecx, &edx); 775fbebb2d2095e5c7d289d5f4ffecc2f2661c584aK. Y. Srinivasan host_info_eax = eax; 785fbebb2d2095e5c7d289d5f4ffecc2f2661c584aK. Y. Srinivasan host_info_ebx = ebx; 795fbebb2d2095e5c7d289d5f4ffecc2f2661c584aK. Y. Srinivasan host_info_ecx = ecx; 805fbebb2d2095e5c7d289d5f4ffecc2f2661c584aK. Y. Srinivasan host_info_edx = edx; 810831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman } 82b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang return max_leaf; 830831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman} 843e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 853e18951955797872558dad615851a4ca63b2770eHank Janssen/* 86d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * do_hypercall- Invoke the specified hypercall 870831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 88d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangstatic u64 do_hypercall(u64 control, void *input, void *output) 893e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 90530cf2070be30831a371b6c7181d15e5976b6fc7Greg Kroah-Hartman#ifdef CONFIG_X86_64 91b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u64 hv_status = 0; 92b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u64 input_address = (input) ? virt_to_phys(input) : 0; 93b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u64 output_address = (output) ? virt_to_phys(output) : 0; 94dec317fd6accfdba4daff13aa4d9f5abde02b347K. Y. Srinivasan void *hypercall_page = hv_context.hypercall_page; 953e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 96b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang __asm__ __volatile__("mov %0, %%r8" : : "r" (output_address) : "r8"); 97b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang __asm__ __volatile__("call *%3" : "=a" (hv_status) : 98b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "c" (control), "d" (input_address), 99b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "m" (hypercall_page)); 1003e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 101b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang return hv_status; 1023e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 1033e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen#else 1043e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 105b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 control_hi = control >> 32; 106b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 control_lo = control & 0xFFFFFFFF; 107b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 hv_status_hi = 1; 108b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 hv_status_lo = 1; 109b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u64 input_address = (input) ? virt_to_phys(input) : 0; 110b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 input_address_hi = input_address >> 32; 111b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 input_address_lo = input_address & 0xFFFFFFFF; 112b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u64 output_address = (output) ? virt_to_phys(output) : 0; 113b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 output_address_hi = output_address >> 32; 114b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 output_address_lo = output_address & 0xFFFFFFFF; 115dec317fd6accfdba4daff13aa4d9f5abde02b347K. Y. Srinivasan void *hypercall_page = hv_context.hypercall_page; 1163e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 117b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang __asm__ __volatile__ ("call *%8" : "=d"(hv_status_hi), 118b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "=a"(hv_status_lo) : "d" (control_hi), 119b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "a" (control_lo), "b" (input_address_hi), 120b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "c" (input_address_lo), "D"(output_address_hi), 121b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "S"(output_address_lo), "m" (hypercall_page)); 1223e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 123b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang return hv_status_lo | ((u64)hv_status_hi << 32); 1240831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman#endif /* !x86_64 */ 1253e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 1263e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 1273e18951955797872558dad615851a4ca63b2770eHank Janssen/* 128d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_init - Main initialization routine. 1290831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * 1300831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * This routine must be called before any other routines in here are called 1310831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 132d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangint hv_init(void) 1333e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 134b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang int max_leaf; 135b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang union hv_x64_msr_hypercall_contents hypercall_msr; 136b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang void *virtaddr = NULL; 1373e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 13814c1bf8a8920f36f6e0603a2ff920b48eec14387K. Y. Srinivasan memset(hv_context.synic_event_page, 0, sizeof(void *) * NR_CPUS); 1396a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang memset(hv_context.synic_message_page, 0, 14014c1bf8a8920f36f6e0603a2ff920b48eec14387K. Y. Srinivasan sizeof(void *) * NR_CPUS); 141b29ef3546aecb253a5552b198cef23750d56e1e4K. Y. Srinivasan memset(hv_context.post_msg_page, 0, 142b29ef3546aecb253a5552b198cef23750d56e1e4K. Y. Srinivasan sizeof(void *) * NR_CPUS); 143917ea427c78670958488f7f304e4629c325969a4K. Y. Srinivasan memset(hv_context.vp_index, 0, 144917ea427c78670958488f7f304e4629c325969a4K. Y. Srinivasan sizeof(int) * NR_CPUS); 145db11f12a11c9f04d504510e1cc20775209b0e509K. Y. Srinivasan memset(hv_context.event_dpc, 0, 146db11f12a11c9f04d504510e1cc20775209b0e509K. Y. Srinivasan sizeof(void *) * NR_CPUS); 1473e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 148d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang max_leaf = query_hypervisor_info(); 1493e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 15083ba0c4f3f317270dae5597d8044b795d119914cK. Y. Srinivasan /* 15183ba0c4f3f317270dae5597d8044b795d119914cK. Y. Srinivasan * Write our OS ID. 15283ba0c4f3f317270dae5597d8044b795d119914cK. Y. Srinivasan */ 15383ba0c4f3f317270dae5597d8044b795d119914cK. Y. Srinivasan hv_context.guestid = generate_guest_id(0, LINUX_VERSION_CODE, 0); 15483ba0c4f3f317270dae5597d8044b795d119914cK. Y. Srinivasan wrmsrl(HV_X64_MSR_GUEST_OS_ID, hv_context.guestid); 155a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 156454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton /* See if the hypercall page is already set */ 157b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); 1583e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 159df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan virtaddr = __vmalloc(PAGE_SIZE, GFP_KERNEL, PAGE_KERNEL_EXEC); 1603e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 16198e087022b611c6f748c74d952193ccf69280f52Hank Janssen if (!virtaddr) 16244939d37cc03af996d93b9d15385ac13de2bd627K. Y. Srinivasan goto cleanup; 1633e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 164b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hypercall_msr.enable = 1; 165a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 166b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hypercall_msr.guest_physical_address = vmalloc_to_pfn(virtaddr); 167b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); 168a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 169a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen /* Confirm that hypercall page did get setup. */ 170b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hypercall_msr.as_uint64 = 0; 171b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); 172a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 17398e087022b611c6f748c74d952193ccf69280f52Hank Janssen if (!hypercall_msr.enable) 17444939d37cc03af996d93b9d15385ac13de2bd627K. Y. Srinivasan goto cleanup; 1753e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 176b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hv_context.hypercall_page = virtaddr; 177a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 1785433e00334d3e20f8bff70845c7f44e00cdf2d14K. Y. Srinivasan return 0; 1793e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 18044939d37cc03af996d93b9d15385ac13de2bd627K. Y. Srinivasancleanup: 181b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang if (virtaddr) { 182b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang if (hypercall_msr.enable) { 183b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hypercall_msr.as_uint64 = 0; 184b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); 1853e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen } 1863e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 187b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang vfree(virtaddr); 1883e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen } 1895433e00334d3e20f8bff70845c7f44e00cdf2d14K. Y. Srinivasan 1905433e00334d3e20f8bff70845c7f44e00cdf2d14K. Y. Srinivasan return -ENOTSUPP; 1913e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 1923e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 1933e18951955797872558dad615851a4ca63b2770eHank Janssen/* 194d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_cleanup - Cleanup routine. 1950831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * 1960831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * This routine is called normally during driver unloading or exiting. 1970831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 198d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangvoid hv_cleanup(void) 1993e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 200b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang union hv_x64_msr_hypercall_contents hypercall_msr; 2013e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 20293e5bd06a95343c701361fa009cdc5a653d6ec8eK. Y. Srinivasan /* Reset our OS id */ 20393e5bd06a95343c701361fa009cdc5a653d6ec8eK. Y. Srinivasan wrmsrl(HV_X64_MSR_GUEST_OS_ID, 0); 20493e5bd06a95343c701361fa009cdc5a653d6ec8eK. Y. Srinivasan 2056a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (hv_context.hypercall_page) { 206b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hypercall_msr.as_uint64 = 0; 207b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); 2086a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang vfree(hv_context.hypercall_page); 2096a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.hypercall_page = NULL; 2103e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen } 2113e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 2123e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2133e18951955797872558dad615851a4ca63b2770eHank Janssen/* 214d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_post_message - Post a message using the hypervisor message IPC. 2150831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * 2160831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * This involves a hypercall. 2170831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 218415f0a02adaea754dc85cde7b50707f7fbc4cf3fDan Carpenterint hv_post_message(union hv_connection_id connection_id, 219b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang enum hv_message_type message_type, 220b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang void *payload, size_t payload_size) 2213e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 2223e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 223b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang struct hv_input_post_message *aligned_msg; 224034469e6338b8d683419e3ee7f2543419dd5b574Greg Kroah-Hartman u16 status; 2253e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 226b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang if (payload_size > HV_MESSAGE_PAYLOAD_BYTE_COUNT) 22739594abcd47da2f587804dff2fedbd7ada4670d0K. Y. Srinivasan return -EMSGSIZE; 2283e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 229b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang aligned_msg = (struct hv_input_post_message *) 230b29ef3546aecb253a5552b198cef23750d56e1e4K. Y. Srinivasan hv_context.post_msg_page[get_cpu()]; 2313e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 232b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang aligned_msg->connectionid = connection_id; 233b29ef3546aecb253a5552b198cef23750d56e1e4K. Y. Srinivasan aligned_msg->reserved = 0; 234b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang aligned_msg->message_type = message_type; 235b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang aligned_msg->payload_size = payload_size; 236b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang memcpy((void *)aligned_msg->payload, payload, payload_size); 2373e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 238d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang status = do_hypercall(HVCALL_POST_MESSAGE, aligned_msg, NULL) 239d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang & 0xFFFF; 2403e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 241b29ef3546aecb253a5552b198cef23750d56e1e4K. Y. Srinivasan put_cpu(); 2423e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen return status; 2433e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 2443e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2453e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2463e18951955797872558dad615851a4ca63b2770eHank Janssen/* 247d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_signal_event - 248d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * Signal an event on the specified connection using the hypervisor event IPC. 2490831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * 2500831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * This involves a hypercall. 2510831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 2521f42248d724a413baaafd5f83a8f4746bc6f51a5K. Y. Srinivasanu16 hv_signal_event(void *con_id) 2533e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 254034469e6338b8d683419e3ee7f2543419dd5b574Greg Kroah-Hartman u16 status; 2553e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2561f42248d724a413baaafd5f83a8f4746bc6f51a5K. Y. Srinivasan status = (do_hypercall(HVCALL_SIGNAL_EVENT, con_id, NULL) & 0xFFFF); 2571f42248d724a413baaafd5f83a8f4746bc6f51a5K. Y. Srinivasan 2583e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen return status; 2593e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 2603e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2612608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang 2622608fb653103419ac163206ff6d51b7b6528e2d9Jason Wangint hv_synic_alloc(void) 2632608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang{ 2642608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang size_t size = sizeof(struct tasklet_struct); 2652608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang int cpu; 2662608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang 2672608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang for_each_online_cpu(cpu) { 2682608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang hv_context.event_dpc[cpu] = kmalloc(size, GFP_ATOMIC); 2692608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang if (hv_context.event_dpc[cpu] == NULL) { 2702608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang pr_err("Unable to allocate event dpc\n"); 2712608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang goto err; 2722608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang } 2732608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang tasklet_init(hv_context.event_dpc[cpu], vmbus_on_event, cpu); 2742608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang 2752608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang hv_context.synic_message_page[cpu] = 2762608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang (void *)get_zeroed_page(GFP_ATOMIC); 2772608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang 2782608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang if (hv_context.synic_message_page[cpu] == NULL) { 2792608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang pr_err("Unable to allocate SYNIC message page\n"); 2802608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang goto err; 2812608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang } 2822608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang 2832608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang hv_context.synic_event_page[cpu] = 2842608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang (void *)get_zeroed_page(GFP_ATOMIC); 2852608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang 2862608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang if (hv_context.synic_event_page[cpu] == NULL) { 2872608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang pr_err("Unable to allocate SYNIC event page\n"); 2882608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang goto err; 2892608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang } 290b29ef3546aecb253a5552b198cef23750d56e1e4K. Y. Srinivasan 291b29ef3546aecb253a5552b198cef23750d56e1e4K. Y. Srinivasan hv_context.post_msg_page[cpu] = 292b29ef3546aecb253a5552b198cef23750d56e1e4K. Y. Srinivasan (void *)get_zeroed_page(GFP_ATOMIC); 293b29ef3546aecb253a5552b198cef23750d56e1e4K. Y. Srinivasan 294b29ef3546aecb253a5552b198cef23750d56e1e4K. Y. Srinivasan if (hv_context.post_msg_page[cpu] == NULL) { 295b29ef3546aecb253a5552b198cef23750d56e1e4K. Y. Srinivasan pr_err("Unable to allocate post msg page\n"); 296b29ef3546aecb253a5552b198cef23750d56e1e4K. Y. Srinivasan goto err; 297b29ef3546aecb253a5552b198cef23750d56e1e4K. Y. Srinivasan } 2982608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang } 2992608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang 3002608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang return 0; 3012608fb653103419ac163206ff6d51b7b6528e2d9Jason Wangerr: 3022608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang return -ENOMEM; 3032608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang} 3042608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang 3058712954d15f194f9639f60e6347797d784c03abbRashika Kheriastatic void hv_synic_free_cpu(int cpu) 3062608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang{ 3072608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang kfree(hv_context.event_dpc[cpu]); 308fdf91dae6f024c6dfee425fe754df6b1957f6c53Felipe Pena if (hv_context.synic_event_page[cpu]) 3092608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang free_page((unsigned long)hv_context.synic_event_page[cpu]); 3102608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang if (hv_context.synic_message_page[cpu]) 3112608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang free_page((unsigned long)hv_context.synic_message_page[cpu]); 312b29ef3546aecb253a5552b198cef23750d56e1e4K. Y. Srinivasan if (hv_context.post_msg_page[cpu]) 313b29ef3546aecb253a5552b198cef23750d56e1e4K. Y. Srinivasan free_page((unsigned long)hv_context.post_msg_page[cpu]); 3142608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang} 3152608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang 3162608fb653103419ac163206ff6d51b7b6528e2d9Jason Wangvoid hv_synic_free(void) 3172608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang{ 3182608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang int cpu; 3192608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang 3202608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang for_each_online_cpu(cpu) 3212608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang hv_synic_free_cpu(cpu); 3222608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang} 3232608fb653103419ac163206ff6d51b7b6528e2d9Jason Wang 3243e18951955797872558dad615851a4ca63b2770eHank Janssen/* 325d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_synic_init - Initialize the Synthethic Interrupt Controller. 3260831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * 3270831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * If it is already initialized by another entity (ie x2v shim), we need to 3280831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * retrieve the initialized message and event pages. Otherwise, we create and 3290831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * initialize the message and event pages. 3300831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 331302a3c0f2757ae1a3e7df3f9fa1f20e2214ab945K. Y. Srinivasanvoid hv_synic_init(void *arg) 3323e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 3330831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman u64 version; 334eacb1b4d24c2a8b7c1d73bb72e04920980ec8a4fGreg Kroah-Hartman union hv_synic_simp simp; 335eacb1b4d24c2a8b7c1d73bb72e04920980ec8a4fGreg Kroah-Hartman union hv_synic_siefp siefp; 336b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang union hv_synic_sint shared_sint; 337eacb1b4d24c2a8b7c1d73bb72e04920980ec8a4fGreg Kroah-Hartman union hv_synic_scontrol sctrl; 338917ea427c78670958488f7f304e4629c325969a4K. Y. Srinivasan u64 vp_index; 339a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 3407692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman int cpu = smp_processor_id(); 3413e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3426a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (!hv_context.hypercall_page) 3437692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman return; 3443e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 345454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton /* Check the version */ 346a51ed7d65d62aa5ad8d364aa76af30328c26263fGreg Kroah-Hartman rdmsrl(HV_X64_MSR_SVERSION, version); 3473e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 348a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen /* Setup the Synic's message page */ 349f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang rdmsrl(HV_X64_MSR_SIMP, simp.as_uint64); 350f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang simp.simp_enabled = 1; 3516a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang simp.base_simp_gpa = virt_to_phys(hv_context.synic_message_page[cpu]) 352a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen >> PAGE_SHIFT; 3533e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 354f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang wrmsrl(HV_X64_MSR_SIMP, simp.as_uint64); 3553e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 356a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen /* Setup the Synic's event page */ 357f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang rdmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); 358f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang siefp.siefp_enabled = 1; 3596a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang siefp.base_siefp_gpa = virt_to_phys(hv_context.synic_event_page[cpu]) 360a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen >> PAGE_SHIFT; 361a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 362f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang wrmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); 3630831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman 3640831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman /* Setup the shared SINT. */ 365b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang rdmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); 3663e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 367b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang shared_sint.as_uint64 = 0; 368302a3c0f2757ae1a3e7df3f9fa1f20e2214ab945K. Y. Srinivasan shared_sint.vector = HYPERVISOR_CALLBACK_VECTOR; 369b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang shared_sint.masked = false; 370b0209501dc7586cbfbf6d023f2dd3ce4621aff2cK. Y. Srinivasan shared_sint.auto_eoi = true; 3713e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 372b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); 3733e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 374454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton /* Enable the global synic bit */ 375f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang rdmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64); 376f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang sctrl.enable = 1; 3773e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 378f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang wrmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64); 3793e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3806a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.synic_initialized = true; 381917ea427c78670958488f7f304e4629c325969a4K. Y. Srinivasan 382917ea427c78670958488f7f304e4629c325969a4K. Y. Srinivasan /* 383917ea427c78670958488f7f304e4629c325969a4K. Y. Srinivasan * Setup the mapping between Hyper-V's notion 384917ea427c78670958488f7f304e4629c325969a4K. Y. Srinivasan * of cpuid and Linux' notion of cpuid. 385917ea427c78670958488f7f304e4629c325969a4K. Y. Srinivasan * This array will be indexed using Linux cpuid. 386917ea427c78670958488f7f304e4629c325969a4K. Y. Srinivasan */ 387917ea427c78670958488f7f304e4629c325969a4K. Y. Srinivasan rdmsrl(HV_X64_MSR_VP_INDEX, vp_index); 388917ea427c78670958488f7f304e4629c325969a4K. Y. Srinivasan hv_context.vp_index[cpu] = (u32)vp_index; 3893a28fa35d6658703cd26f9c16aaea0eae06afd40K. Y. Srinivasan 3903a28fa35d6658703cd26f9c16aaea0eae06afd40K. Y. Srinivasan INIT_LIST_HEAD(&hv_context.percpu_list[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