hv.c revision 1f42248d724a413baaafd5f83a8f4746bc6f51a5
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> 30407dd1644302ea78fa5d740e67a1c09677aa18a4Greg Kroah-Hartman#include <asm/hyperv.h> 310f2a6619eeef158d11832436ce151987f18cb08dK. Y. Srinivasan#include "hyperv_vmbus.h" 323e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 33454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton/* The one and only */ 346a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhangstruct hv_context hv_context = { 356a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang .synic_initialized = false, 366a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang .hypercall_page = NULL, 376a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang .signal_event_param = NULL, 386a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang .signal_event_buffer = NULL, 393e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen}; 403e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 413e18951955797872558dad615851a4ca63b2770eHank Janssen/* 42d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * query_hypervisor_info - Get version info of the windows hypervisor 430831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 44d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangstatic int query_hypervisor_info(void) 450831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman{ 460831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int eax; 470831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int ebx; 480831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int ecx; 490831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int edx; 50b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang unsigned int max_leaf; 510831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman unsigned int op; 523e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 530831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman /* 540831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * Its assumed that this is called after confirming that Viridian 550831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * is present. Query id and revision. 560831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 570831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman eax = 0; 580831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ebx = 0; 590831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ecx = 0; 600831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman edx = 0; 61f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang op = HVCPUID_VENDOR_MAXFUNCTION; 620831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman cpuid(op, &eax, &ebx, &ecx, &edx); 633e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 64b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang max_leaf = eax; 650831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman 66b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang if (max_leaf >= HVCPUID_VERSION) { 670831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman eax = 0; 680831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ebx = 0; 690831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ecx = 0; 700831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman edx = 0; 71f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang op = HVCPUID_VERSION; 720831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman cpuid(op, &eax, &ebx, &ecx, &edx); 730a46618d58c90f93e8b8e9a18062d1691b70297eHank Janssen pr_info("Hyper-V Host OS Build:%d-%d.%d-%d-%d.%d\n", 740831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman eax, 750831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ebx >> 16, 760831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ebx & 0xFFFF, 770831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman ecx, 780831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman edx >> 24, 790831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman edx & 0xFFFFFF); 800831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman } 81b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang return max_leaf; 820831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman} 833e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 843e18951955797872558dad615851a4ca63b2770eHank Janssen/* 85d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * do_hypercall- Invoke the specified hypercall 860831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 87d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangstatic u64 do_hypercall(u64 control, void *input, void *output) 883e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 89530cf2070be30831a371b6c7181d15e5976b6fc7Greg Kroah-Hartman#ifdef CONFIG_X86_64 90b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u64 hv_status = 0; 91b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u64 input_address = (input) ? virt_to_phys(input) : 0; 92b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u64 output_address = (output) ? virt_to_phys(output) : 0; 93dec317fd6accfdba4daff13aa4d9f5abde02b347K. Y. Srinivasan void *hypercall_page = hv_context.hypercall_page; 943e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 95b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang __asm__ __volatile__("mov %0, %%r8" : : "r" (output_address) : "r8"); 96b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang __asm__ __volatile__("call *%3" : "=a" (hv_status) : 97b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "c" (control), "d" (input_address), 98b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "m" (hypercall_page)); 993e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 100b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang return hv_status; 1013e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 1023e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen#else 1033e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 104b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 control_hi = control >> 32; 105b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 control_lo = control & 0xFFFFFFFF; 106b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 hv_status_hi = 1; 107b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 hv_status_lo = 1; 108b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u64 input_address = (input) ? virt_to_phys(input) : 0; 109b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 input_address_hi = input_address >> 32; 110b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 input_address_lo = input_address & 0xFFFFFFFF; 111b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u64 output_address = (output) ? virt_to_phys(output) : 0; 112b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 output_address_hi = output_address >> 32; 113b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 output_address_lo = output_address & 0xFFFFFFFF; 114dec317fd6accfdba4daff13aa4d9f5abde02b347K. Y. Srinivasan void *hypercall_page = hv_context.hypercall_page; 1153e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 116b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang __asm__ __volatile__ ("call *%8" : "=d"(hv_status_hi), 117b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "=a"(hv_status_lo) : "d" (control_hi), 118b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "a" (control_lo), "b" (input_address_hi), 119b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "c" (input_address_lo), "D"(output_address_hi), 120b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang "S"(output_address_lo), "m" (hypercall_page)); 1213e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 122b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang return hv_status_lo | ((u64)hv_status_hi << 32); 1230831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman#endif /* !x86_64 */ 1243e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 1253e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 1263e18951955797872558dad615851a4ca63b2770eHank Janssen/* 127d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_init - Main initialization routine. 1280831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * 1290831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * This routine must be called before any other routines in here are called 1300831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 131d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangint hv_init(void) 1323e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 133b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang int max_leaf; 134b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang union hv_x64_msr_hypercall_contents hypercall_msr; 135b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang void *virtaddr = NULL; 1363e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 13714c1bf8a8920f36f6e0603a2ff920b48eec14387K. Y. Srinivasan memset(hv_context.synic_event_page, 0, sizeof(void *) * NR_CPUS); 1386a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang memset(hv_context.synic_message_page, 0, 13914c1bf8a8920f36f6e0603a2ff920b48eec14387K. Y. Srinivasan sizeof(void *) * NR_CPUS); 1403e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 141d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang max_leaf = query_hypervisor_info(); 1423e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 14383ba0c4f3f317270dae5597d8044b795d119914cK. Y. Srinivasan /* 14483ba0c4f3f317270dae5597d8044b795d119914cK. Y. Srinivasan * Write our OS ID. 14583ba0c4f3f317270dae5597d8044b795d119914cK. Y. Srinivasan */ 14683ba0c4f3f317270dae5597d8044b795d119914cK. Y. Srinivasan hv_context.guestid = generate_guest_id(0, LINUX_VERSION_CODE, 0); 14783ba0c4f3f317270dae5597d8044b795d119914cK. Y. Srinivasan wrmsrl(HV_X64_MSR_GUEST_OS_ID, hv_context.guestid); 148a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 149454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton /* See if the hypercall page is already set */ 150b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); 1513e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 152df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan virtaddr = __vmalloc(PAGE_SIZE, GFP_KERNEL, PAGE_KERNEL_EXEC); 1533e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 15498e087022b611c6f748c74d952193ccf69280f52Hank Janssen if (!virtaddr) 15544939d37cc03af996d93b9d15385ac13de2bd627K. Y. Srinivasan goto cleanup; 1563e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 157b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hypercall_msr.enable = 1; 158a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 159b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hypercall_msr.guest_physical_address = vmalloc_to_pfn(virtaddr); 160b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); 161a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 162a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen /* Confirm that hypercall page did get setup. */ 163b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hypercall_msr.as_uint64 = 0; 164b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); 165a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 16698e087022b611c6f748c74d952193ccf69280f52Hank Janssen if (!hypercall_msr.enable) 16744939d37cc03af996d93b9d15385ac13de2bd627K. Y. Srinivasan goto cleanup; 1683e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 169b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hv_context.hypercall_page = virtaddr; 170a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 171454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton /* Setup the global signal event param for the signal event hypercall */ 1726a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_buffer = 1730831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman kmalloc(sizeof(struct hv_input_signal_event_buffer), 1740831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman GFP_KERNEL); 1756a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (!hv_context.signal_event_buffer) 17644939d37cc03af996d93b9d15385ac13de2bd627K. Y. Srinivasan goto cleanup; 1773e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 1786a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param = 1790831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman (struct hv_input_signal_event *) 1807350968193f9b94c4a4b7d14d7a44333a322c5d7Uwe Kleine-König (ALIGN((unsigned long) 1816a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_buffer, 1820831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman HV_HYPERCALL_PARAM_ALIGN)); 1836a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param->connectionid.asu32 = 0; 1846a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param->connectionid.u.id = 1850831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman VMBUS_EVENT_CONNECTION_ID; 1866a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param->flag_number = 0; 1876a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param->rsvdz = 0; 1883e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 1895433e00334d3e20f8bff70845c7f44e00cdf2d14K. Y. Srinivasan return 0; 1903e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 19144939d37cc03af996d93b9d15385ac13de2bd627K. Y. Srinivasancleanup: 192b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang if (virtaddr) { 193b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang if (hypercall_msr.enable) { 194b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hypercall_msr.as_uint64 = 0; 195b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); 1963e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen } 1973e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 198b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang vfree(virtaddr); 1993e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen } 2005433e00334d3e20f8bff70845c7f44e00cdf2d14K. Y. Srinivasan 2015433e00334d3e20f8bff70845c7f44e00cdf2d14K. Y. Srinivasan return -ENOTSUPP; 2023e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 2033e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2043e18951955797872558dad615851a4ca63b2770eHank Janssen/* 205d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_cleanup - Cleanup routine. 2060831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * 2070831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * This routine is called normally during driver unloading or exiting. 2080831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 209d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangvoid hv_cleanup(void) 2103e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 211b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang union hv_x64_msr_hypercall_contents hypercall_msr; 2123e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 21393e5bd06a95343c701361fa009cdc5a653d6ec8eK. Y. Srinivasan /* Reset our OS id */ 21493e5bd06a95343c701361fa009cdc5a653d6ec8eK. Y. Srinivasan wrmsrl(HV_X64_MSR_GUEST_OS_ID, 0); 21593e5bd06a95343c701361fa009cdc5a653d6ec8eK. Y. Srinivasan 2166a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang kfree(hv_context.signal_event_buffer); 2176a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_buffer = NULL; 2186a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.signal_event_param = NULL; 2193e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2206a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (hv_context.hypercall_page) { 221b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang hypercall_msr.as_uint64 = 0; 222b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); 2236a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang vfree(hv_context.hypercall_page); 2246a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.hypercall_page = NULL; 2253e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen } 2263e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 2273e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2283e18951955797872558dad615851a4ca63b2770eHank Janssen/* 229d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_post_message - Post a message using the hypervisor message IPC. 2300831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * 2310831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * This involves a hypercall. 2320831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 233415f0a02adaea754dc85cde7b50707f7fbc4cf3fDan Carpenterint hv_post_message(union hv_connection_id connection_id, 234b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang enum hv_message_type message_type, 235b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang void *payload, size_t payload_size) 2363e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 237b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang struct aligned_input { 2380831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman u64 alignment8; 239cba4decdd3dcd224b17631572456951aace0a27eGreg Kroah-Hartman struct hv_input_post_message msg; 2403e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen }; 2413e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 242b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang struct hv_input_post_message *aligned_msg; 243034469e6338b8d683419e3ee7f2543419dd5b574Greg Kroah-Hartman u16 status; 244c4b0bc94828a86cfb6a975b0e0d92dc1cd389565Greg Kroah-Hartman unsigned long addr; 2453e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 246b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang if (payload_size > HV_MESSAGE_PAYLOAD_BYTE_COUNT) 24739594abcd47da2f587804dff2fedbd7ada4670d0K. Y. Srinivasan return -EMSGSIZE; 2483e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 249b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang addr = (unsigned long)kmalloc(sizeof(struct aligned_input), GFP_ATOMIC); 2503e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen if (!addr) 25139594abcd47da2f587804dff2fedbd7ada4670d0K. Y. Srinivasan return -ENOMEM; 2523e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 253b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang aligned_msg = (struct hv_input_post_message *) 2547350968193f9b94c4a4b7d14d7a44333a322c5d7Uwe Kleine-König (ALIGN(addr, HV_HYPERCALL_PARAM_ALIGN)); 2553e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 256b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang aligned_msg->connectionid = connection_id; 257b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang aligned_msg->message_type = message_type; 258b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang aligned_msg->payload_size = payload_size; 259b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang memcpy((void *)aligned_msg->payload, payload, payload_size); 2603e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 261d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang status = do_hypercall(HVCALL_POST_MESSAGE, aligned_msg, NULL) 262d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang & 0xFFFF; 2633e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2640831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman kfree((void *)addr); 2653e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2663e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen return status; 2673e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 2683e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2693e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2703e18951955797872558dad615851a4ca63b2770eHank Janssen/* 271d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_signal_event - 272d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * Signal an event on the specified connection using the hypervisor event IPC. 2730831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * 2740831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * This involves a hypercall. 2750831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 2761f42248d724a413baaafd5f83a8f4746bc6f51a5K. Y. Srinivasanu16 hv_signal_event(void *con_id) 2773e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 278034469e6338b8d683419e3ee7f2543419dd5b574Greg Kroah-Hartman u16 status; 2793e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2801f42248d724a413baaafd5f83a8f4746bc6f51a5K. Y. Srinivasan status = (do_hypercall(HVCALL_SIGNAL_EVENT, con_id, NULL) & 0xFFFF); 2811f42248d724a413baaafd5f83a8f4746bc6f51a5K. Y. Srinivasan 2823e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen return status; 2833e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 2843e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 2853e18951955797872558dad615851a4ca63b2770eHank Janssen/* 286d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_synic_init - Initialize the Synthethic Interrupt Controller. 2870831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * 2880831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * If it is already initialized by another entity (ie x2v shim), we need to 2890831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * retrieve the initialized message and event pages. Otherwise, we create and 2900831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman * initialize the message and event pages. 2910831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 292d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangvoid hv_synic_init(void *irqarg) 2933e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 2940831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman u64 version; 295eacb1b4d24c2a8b7c1d73bb72e04920980ec8a4fGreg Kroah-Hartman union hv_synic_simp simp; 296eacb1b4d24c2a8b7c1d73bb72e04920980ec8a4fGreg Kroah-Hartman union hv_synic_siefp siefp; 297b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang union hv_synic_sint shared_sint; 298eacb1b4d24c2a8b7c1d73bb72e04920980ec8a4fGreg Kroah-Hartman union hv_synic_scontrol sctrl; 299a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 300b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang u32 irq_vector = *((u32 *)(irqarg)); 3017692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman int cpu = smp_processor_id(); 3023e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3036a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (!hv_context.hypercall_page) 3047692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman return; 3053e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 306454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton /* Check the version */ 307a51ed7d65d62aa5ad8d364aa76af30328c26263fGreg Kroah-Hartman rdmsrl(HV_X64_MSR_SVERSION, version); 3083e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3096a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.synic_message_page[cpu] = 3106a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang (void *)get_zeroed_page(GFP_ATOMIC); 3113e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3126a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (hv_context.synic_message_page[cpu] == NULL) { 3130a46618d58c90f93e8b8e9a18062d1691b70297eHank Janssen pr_err("Unable to allocate SYNIC message page\n"); 31444939d37cc03af996d93b9d15385ac13de2bd627K. Y. Srinivasan goto cleanup; 315a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen } 3163e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3176a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.synic_event_page[cpu] = 3186a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang (void *)get_zeroed_page(GFP_ATOMIC); 3193e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3206a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (hv_context.synic_event_page[cpu] == NULL) { 3210a46618d58c90f93e8b8e9a18062d1691b70297eHank Janssen pr_err("Unable to allocate SYNIC event page\n"); 32244939d37cc03af996d93b9d15385ac13de2bd627K. Y. Srinivasan goto cleanup; 323a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen } 3243e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 325a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen /* Setup the Synic's message page */ 326f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang rdmsrl(HV_X64_MSR_SIMP, simp.as_uint64); 327f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang simp.simp_enabled = 1; 3286a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang simp.base_simp_gpa = virt_to_phys(hv_context.synic_message_page[cpu]) 329a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen >> PAGE_SHIFT; 3303e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 331f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang wrmsrl(HV_X64_MSR_SIMP, simp.as_uint64); 3323e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 333a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen /* Setup the Synic's event page */ 334f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang rdmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); 335f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang siefp.siefp_enabled = 1; 3366a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang siefp.base_siefp_gpa = virt_to_phys(hv_context.synic_event_page[cpu]) 337a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen >> PAGE_SHIFT; 338a73e6b7c508f610eeb315c443d9ac79041124af0Hank Janssen 339f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang wrmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); 3400831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman 3410831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman /* Setup the shared SINT. */ 342b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang rdmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); 3433e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 344b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang shared_sint.as_uint64 = 0; 345b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang shared_sint.vector = irq_vector; /* HV_SHARED_SINT_IDT_VECTOR + 0x20; */ 346b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang shared_sint.masked = false; 34793511baa06437785758be98ee7a7149c49c8e9c5K. Y. Srinivasan shared_sint.auto_eoi = false; 3483e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 349b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); 3503e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 351454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton /* Enable the global synic bit */ 352f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang rdmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64); 353f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang sctrl.enable = 1; 3543e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 355f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang wrmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64); 3563e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3576a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang hv_context.synic_initialized = true; 3587692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman return; 3593e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 36044939d37cc03af996d93b9d15385ac13de2bd627K. Y. Srinivasancleanup: 3616a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (hv_context.synic_event_page[cpu]) 362df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan free_page((unsigned long)hv_context.synic_event_page[cpu]); 3633e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3646a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (hv_context.synic_message_page[cpu]) 365df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan free_page((unsigned long)hv_context.synic_message_page[cpu]); 3667692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman return; 3673e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 3683e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3693e18951955797872558dad615851a4ca63b2770eHank Janssen/* 370d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhang * hv_synic_cleanup - Cleanup routine for hv_synic_init(). 3710831ad041fd3611b31c10b46b9716b3c6289f1a1Greg Kroah-Hartman */ 372d44890c8d2a83116463c230b59b9b9d356aafe85Haiyang Zhangvoid hv_synic_cleanup(void *arg) 3733e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen{ 374b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang union hv_synic_sint shared_sint; 375eacb1b4d24c2a8b7c1d73bb72e04920980ec8a4fGreg Kroah-Hartman union hv_synic_simp simp; 376eacb1b4d24c2a8b7c1d73bb72e04920980ec8a4fGreg Kroah-Hartman union hv_synic_siefp siefp; 3777692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman int cpu = smp_processor_id(); 3783e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3796a0aaa185057801343e000183ef0695c2a2b75a9Haiyang Zhang if (!hv_context.synic_initialized) 3803e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen return; 3813e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 382b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang rdmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); 3833e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 384b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang shared_sint.masked = 1; 3853e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 3867692fd4d441afac728cb83fdd33349d5ba07406cGreg Kroah-Hartman /* Need to correctly cleanup in the case of SMP!!! */ 387454f18a963cf6519bf317e74e6b9781ffef8d253Bill Pemberton /* Disable the interrupt */ 388b8dfb264f4f9e55f9cf8384cb782dfe5159c413cHaiyang Zhang wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); 3893e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 390f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang rdmsrl(HV_X64_MSR_SIMP, simp.as_uint64); 391f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang simp.simp_enabled = 0; 392f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang simp.base_simp_gpa = 0; 3933e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 394f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang wrmsrl(HV_X64_MSR_SIMP, simp.as_uint64); 3953e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 396f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang rdmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); 397f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang siefp.siefp_enabled = 0; 398f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang siefp.base_siefp_gpa = 0; 3993e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 400f6feebe073db4c97dc10f6fab54f9d4b5816886bHaiyang Zhang wrmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); 4013e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen 402df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan free_page((unsigned long)hv_context.synic_message_page[cpu]); 403df3493e0b3ba72f9b6192a91b24197cac41ce557K. Y. Srinivasan free_page((unsigned long)hv_context.synic_event_page[cpu]); 4043e7ee4902fe6996048f03433dd111426db3cfa92Hank Janssen} 405