1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Hyper-V specific functions. 4 * 5 * Copyright (C) 2021, Red Hat Inc. 6 */ 7 #include <stdint.h> 8 #include "processor.h" 9 #include "hyperv.h" 10 11 struct hyperv_test_pages *vcpu_alloc_hyperv_test_pages(struct kvm_vm *vm, 12 vm_vaddr_t *p_hv_pages_gva) 13 { 14 vm_vaddr_t hv_pages_gva = vm_vaddr_alloc_page(vm); 15 struct hyperv_test_pages *hv = addr_gva2hva(vm, hv_pages_gva); 16 17 /* Setup of a region of guest memory for the VP Assist page. */ 18 hv->vp_assist = (void *)vm_vaddr_alloc_page(vm); 19 hv->vp_assist_hva = addr_gva2hva(vm, (uintptr_t)hv->vp_assist); 20 hv->vp_assist_gpa = addr_gva2gpa(vm, (uintptr_t)hv->vp_assist); 21 22 /* Setup of a region of guest memory for the partition assist page. */ 23 hv->partition_assist = (void *)vm_vaddr_alloc_page(vm); 24 hv->partition_assist_hva = addr_gva2hva(vm, (uintptr_t)hv->partition_assist); 25 hv->partition_assist_gpa = addr_gva2gpa(vm, (uintptr_t)hv->partition_assist); 26 27 /* Setup of a region of guest memory for the enlightened VMCS. */ 28 hv->enlightened_vmcs = (void *)vm_vaddr_alloc_page(vm); 29 hv->enlightened_vmcs_hva = addr_gva2hva(vm, (uintptr_t)hv->enlightened_vmcs); 30 hv->enlightened_vmcs_gpa = addr_gva2gpa(vm, (uintptr_t)hv->enlightened_vmcs); 31 32 *p_hv_pages_gva = hv_pages_gva; 33 return hv; 34 } 35 36 int enable_vp_assist(uint64_t vp_assist_pa, void *vp_assist) 37 { 38 uint64_t val = (vp_assist_pa & HV_X64_MSR_VP_ASSIST_PAGE_ADDRESS_MASK) | 39 HV_X64_MSR_VP_ASSIST_PAGE_ENABLE; 40 41 wrmsr(HV_X64_MSR_VP_ASSIST_PAGE, val); 42 43 current_vp_assist = vp_assist; 44 45 return 0; 46 } 47