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