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https://github.com/projectacrn/acrn-hypervisor.git
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27aee66f88
In current code process, hyperv data in struct vm_arch is never cleared during VM shutdown and is retained to next VM launch. As the enabled bit of hypercall_page msr is not clear, hypercall page might cause fatal error such as Windows VM BSOD during VM restart and memory remapping. Hyperv page destory function can ensure hyperv page is destory during each VM shutdown so hyperv related config such as hypercall page is established correctly during each VM launch. Tracked-On: #8755 Signed-off-by: Yichong Tang <yichong.tang@intel.com>
69 lines
1.5 KiB
C
69 lines
1.5 KiB
C
/*
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* Copyright (C) 2019-2022 Intel Corporation.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef HYPERV_H
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#define HYPERV_H
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#include <asm/guest/vcpuid.h>
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/* Hyper-V MSR numbers */
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#define HV_X64_MSR_GUEST_OS_ID 0x40000000U
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#define HV_X64_MSR_HYPERCALL 0x40000001U
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#define HV_X64_MSR_VP_INDEX 0x40000002U
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#define HV_X64_MSR_TIME_REF_COUNT 0x40000020U
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#define HV_X64_MSR_REFERENCE_TSC 0x40000021U
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#define HV_X64_MSR_TSC_FREQUENCY 0x40000022U
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#define HV_X64_MSR_APIC_FREQUENCY 0x40000023U
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union hyperv_ref_tsc_page_msr {
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uint64_t val64;
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struct {
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uint64_t enabled:1;
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uint64_t rsvdp:11;
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uint64_t gpfn:52;
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};
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};
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union hyperv_hypercall_msr {
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uint64_t val64;
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struct {
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uint64_t enabled:1;
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uint64_t locked:1;
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uint64_t rsvdp:10;
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uint64_t gpfn:52;
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};
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};
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union hyperv_guest_os_id_msr {
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uint64_t val64;
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struct {
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uint64_t build_number:16;
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uint64_t service_version:8;
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uint64_t minor_version:8;
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uint64_t major_version:8;
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uint64_t os_id:8;
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uint64_t vendor_id:15;
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uint64_t os_type:1;
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};
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};
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struct acrn_hyperv {
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union hyperv_hypercall_msr hypercall_page;
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union hyperv_guest_os_id_msr guest_os_id;
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union hyperv_ref_tsc_page_msr ref_tsc_page;
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uint64_t tsc_scale;
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uint64_t tsc_offset;
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};
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int32_t hyperv_wrmsr(struct acrn_vcpu *vcpu, uint32_t msr, uint64_t wval);
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int32_t hyperv_rdmsr(struct acrn_vcpu *vcpu, uint32_t msr, uint64_t *rval);
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void hyperv_init_time(struct acrn_vm *vm);
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void hyperv_init_vcpuid_entry(uint32_t leaf, uint32_t subleaf, uint32_t flags,
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struct vcpuid_entry *entry);
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void hyperv_page_destory(struct acrn_vm *vm);
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#endif
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