diff options
| author | Sunil Muthuswamy <sunilmut@microsoft.com> | 2020-02-26 20:54:39 +0000 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-03-16 23:02:21 +0100 |
| commit | 6785e767017a3fcc39e245b7bca2c383b8bf39ef (patch) | |
| tree | c1a080df48d48a2bf309cad33773793e3a0d1689 /target/i386/whp-dispatch.h | |
| parent | 27f08ea1c7abf04125f6f9f23b8ba2f8c20e95b6 (diff) | |
WHPX: TSC get and set should be dependent on VM state
Currently, TSC is set as part of the VM runtime state. Setting TSC at
runtime is heavy and additionally can have side effects on the guest,
which are not very resilient to variances in the TSC. This patch uses
the VM state to determine whether to set TSC or not. Some minor
enhancements for getting TSC values as well that considers the VM state.
Additionally, while setting the TSC, the partition is suspended to
reduce the variance in the TSC value across vCPUs.
Signed-off-by: Sunil Muthuswamy <sunilmut@microsoft.com>
Message-Id: <SN4PR2101MB08804D23439166E81FF151F7C0EA0@SN4PR2101MB0880.namprd21.prod.outlook.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'target/i386/whp-dispatch.h')
| -rw-r--r-- | target/i386/whp-dispatch.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/target/i386/whp-dispatch.h b/target/i386/whp-dispatch.h index 87d049ceab..e4695c349f 100644 --- a/target/i386/whp-dispatch.h +++ b/target/i386/whp-dispatch.h @@ -23,6 +23,12 @@ X(HRESULT, WHvGetVirtualProcessorRegisters, (WHV_PARTITION_HANDLE Partition, UINT32 VpIndex, const WHV_REGISTER_NAME* RegisterNames, UINT32 RegisterCount, WHV_REGISTER_VALUE* RegisterValues)) \ X(HRESULT, WHvSetVirtualProcessorRegisters, (WHV_PARTITION_HANDLE Partition, UINT32 VpIndex, const WHV_REGISTER_NAME* RegisterNames, UINT32 RegisterCount, const WHV_REGISTER_VALUE* RegisterValues)) \ +/* + * These are supplemental functions that may not be present + * on all versions and are not critical for basic functionality. + */ +#define LIST_WINHVPLATFORM_FUNCTIONS_SUPPLEMENTAL(X) \ + X(HRESULT, WHvSuspendPartitionTime, (WHV_PARTITION_HANDLE Partition)) \ #define LIST_WINHVEMULATION_FUNCTIONS(X) \ X(HRESULT, WHvEmulatorCreateEmulator, (const WHV_EMULATOR_CALLBACKS* Callbacks, WHV_EMULATOR_HANDLE* Emulator)) \ @@ -40,10 +46,12 @@ /* Define function typedef */ LIST_WINHVPLATFORM_FUNCTIONS(WHP_DEFINE_TYPE) LIST_WINHVEMULATION_FUNCTIONS(WHP_DEFINE_TYPE) +LIST_WINHVPLATFORM_FUNCTIONS_SUPPLEMENTAL(WHP_DEFINE_TYPE) struct WHPDispatch { LIST_WINHVPLATFORM_FUNCTIONS(WHP_DECLARE_MEMBER) LIST_WINHVEMULATION_FUNCTIONS(WHP_DECLARE_MEMBER) + LIST_WINHVPLATFORM_FUNCTIONS_SUPPLEMENTAL(WHP_DECLARE_MEMBER) }; extern struct WHPDispatch whp_dispatch; @@ -53,6 +61,7 @@ bool init_whp_dispatch(void); typedef enum WHPFunctionList { WINHV_PLATFORM_FNS_DEFAULT, WINHV_EMULATION_FNS_DEFAULT, + WINHV_PLATFORM_FNS_SUPPLEMENTAL } WHPFunctionList; #endif /* WHP_DISPATCH_H */ |