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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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15
hypervisor/include/arch/x86/guest/hyperv.h
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@@ -14,6 +14,18 @@
#define HV_X64_MSR_HYPERCALL 0x40000001U
#define HV_X64_MSR_VP_INDEX 0x40000002U
#define HV_X64_MSR_TIME_REF_COUNT 0x40000020U
#define HV_X64_MSR_REFERENCE_TSC 0x40000021U
union hyperv_ref_tsc_page_msr {
uint64_t val64;
struct {
uint64_t enabled:1;
uint64_t rsvdp:11;
uint64_t gpfn:52;
};
};
union hyperv_hypercall_msr {
uint64_t val64;
struct {
@@ -40,6 +52,9 @@ union hyperv_guest_os_id_msr {
struct acrn_hyperv {
union hyperv_hypercall_msr hypercall_page;
union hyperv_guest_os_id_msr guest_os_id;
union hyperv_ref_tsc_page_msr ref_tsc_page;
uint64_t tsc_scale;
uint64_t tsc_offset;
};
int32_t hyperv_wrmsr(struct acrn_vcpu *vcpu, uint32_t msr, uint64_t wval);