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https://github.com/projectacrn/acrn-hypervisor.git
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31b8b698ce
TLFS spec defines that when a VM is created, the value of HV_X64_MSR_TIME_REF_COUNT is set to zero. Now tsc_offset is not supported properly, so guest get a drifted reference time. This patch implements tsc_offset. tsc_scale and tsc_offset are calculated when a VM is launched and are saved in struct acrn_hyperv of struct acrn_vm. Tracked-On: #5956 Signed-off-by: Jian Jun Chen <jian.jun.chen@intel.com> Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com> Acked-by: Eddie Dong <eddie.dong@intel.com>
66 lines
1.4 KiB
C
66 lines
1.4 KiB
C
/*
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* Copyright (C) 2019 Intel Corporation. All rights reserved.
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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 <x86/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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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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#endif
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