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hv: support reference time enlightenment

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Two time related synthetic MSRs are implemented in this patch. Both of
them are partition wide MSR.
- HV_X64_MSR_TIME_REF_COUNT is read only and it is used to return the
  partition's reference counter value in 100ns units.
- HV_X64_MSR_REFERENCE_TSC is used to set/get the reference TSC page,
  a sequence number, an offset and a multiplier are defined in this
  page by hypervisor and guest OS can use them to calculate the
  normalized reference time since partition creation, in 100ns units.

Tracked-On: #3831
Signed-off-by: Jian Jun Chen <jian.jun.chen@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
This commit is contained in:
Jian Jun Chen
2019-10-15 10:50:34 +08:00
committed by wenlingz
parent 048155d3d6
commit 1d194ede61
3 changed files with 143 additions and 1 deletions
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4
hypervisor/arch/x86/guest/vmsr.c
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@@ -401,6 +401,8 @@ int32_t rdmsr_vmexit_handler(struct acrn_vcpu *vcpu)
case HV_X64_MSR_GUEST_OS_ID:
case HV_X64_MSR_HYPERCALL:
case HV_X64_MSR_VP_INDEX:
case HV_X64_MSR_REFERENCE_TSC:
case HV_X64_MSR_TIME_REF_COUNT:
{
err = hyperv_rdmsr(vcpu, msr, &v);
break;
@@ -689,6 +691,8 @@ int32_t wrmsr_vmexit_handler(struct acrn_vcpu *vcpu)
case HV_X64_MSR_GUEST_OS_ID:
case HV_X64_MSR_HYPERCALL:
case HV_X64_MSR_VP_INDEX:
case HV_X64_MSR_REFERENCE_TSC:
case HV_X64_MSR_TIME_REF_COUNT:
{
err = hyperv_wrmsr(vcpu, msr, v);
break;