47 lines
1.5 KiB
C
47 lines
1.5 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Hyper-V specific functions.
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*
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* Copyright (C) 2021, Red Hat Inc.
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*/
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#include <stdint.h>
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#include "processor.h"
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#include "hyperv.h"
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struct hyperv_test_pages *vcpu_alloc_hyperv_test_pages(struct kvm_vm *vm,
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vm_vaddr_t *p_hv_pages_gva)
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{
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vm_vaddr_t hv_pages_gva = vm_vaddr_alloc_page(vm);
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struct hyperv_test_pages *hv = addr_gva2hva(vm, hv_pages_gva);
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/* Setup of a region of guest memory for the VP Assist page. */
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hv->vp_assist = (void *)vm_vaddr_alloc_page(vm);
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hv->vp_assist_hva = addr_gva2hva(vm, (uintptr_t)hv->vp_assist);
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hv->vp_assist_gpa = addr_gva2gpa(vm, (uintptr_t)hv->vp_assist);
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/* Setup of a region of guest memory for the partition assist page. */
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hv->partition_assist = (void *)vm_vaddr_alloc_page(vm);
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hv->partition_assist_hva = addr_gva2hva(vm, (uintptr_t)hv->partition_assist);
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hv->partition_assist_gpa = addr_gva2gpa(vm, (uintptr_t)hv->partition_assist);
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/* Setup of a region of guest memory for the enlightened VMCS. */
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hv->enlightened_vmcs = (void *)vm_vaddr_alloc_page(vm);
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hv->enlightened_vmcs_hva = addr_gva2hva(vm, (uintptr_t)hv->enlightened_vmcs);
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hv->enlightened_vmcs_gpa = addr_gva2gpa(vm, (uintptr_t)hv->enlightened_vmcs);
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*p_hv_pages_gva = hv_pages_gva;
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return hv;
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}
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int enable_vp_assist(uint64_t vp_assist_pa, void *vp_assist)
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{
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uint64_t val = (vp_assist_pa & HV_X64_MSR_VP_ASSIST_PAGE_ADDRESS_MASK) |
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HV_X64_MSR_VP_ASSIST_PAGE_ENABLE;
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wrmsr(HV_X64_MSR_VP_ASSIST_PAGE, val);
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current_vp_assist = vp_assist;
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return 0;
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}
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