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hv: TLFS: Add tsc_offset support for reference time

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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>
This commit is contained in:
Jian Jun Chen
2019-12-20 10:07:27 +08:00
committed by wenlingz
parent b4312efbd7
commit 31b8b698ce
3 changed files with 45 additions and 43 deletions
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2
hypervisor/include/arch/x86/guest/hyperv.h
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@@ -59,7 +59,7 @@ struct acrn_hyperv {
int32_t hyperv_wrmsr(struct acrn_vcpu *vcpu, uint32_t msr, uint64_t wval);
int32_t hyperv_rdmsr(struct acrn_vcpu *vcpu, uint32_t msr, uint64_t *rval);
void hyperv_init_time(struct acrn_vm *vm);
void hyperv_init_vcpuid_entry(uint32_t leaf, uint32_t subleaf, uint32_t flags,
struct vcpuid_entry *entry);
#endif