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Allow VM/PE to be executed manually via non-VM/PE processor 

Signed-off-by: Eugene Myers <edmyers@cyberpackventures.com>
This commit is contained in:
Eugene Myers 2023-02-01 15:34:53 -05:00
parent 479f289e6f
commit bd135e50e7
1 changed files with 22 additions and 3 deletions
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25
Stm/StmPkg/Core/Runtime/SmiVmcallHandler.c
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@ -19,6 +19,9 @@
extern PE_VM_DATA PeVmData[4];
extern VOID EptDumpPageTable (IN EPT_POINTER *EptPointer );
extern PE_SMI_CONTROL PeSmiControl;
extern void SetSwSmiTimerRate(UINT16 value);
extern void StartSwSmiTimer(void);
/**
@ -873,8 +876,9 @@ SmiVmcallRunPeVmHandler (
STM_STATUS Status;
PE_MODULE_INFO LocalBuffer;
// BUG - need to make sure the VM/PE exists
UINT32 PeType = PE_PERM;
// ECX:EBX - STM_VMCS_DATABASE_REQUEST
AcquireSpinLock (&mHostContextCommon.SmiVmcallLock);
DEBUG ((EFI_D_INFO, " %ld STM_API_RUN_PERM_VM:\n", Index));
@ -892,8 +896,23 @@ SmiVmcallRunPeVmHandler (
ReleaseSpinLock (&mHostContextCommon.SmiVmcallLock);
// provide the root state for the measurement VM
//GetRootVmxState(StmVmm, (ROOT_VMX_STATE *) ptData[CR3index].ShareModuleStm);
PeVmData[PeType].StartMode = PEVM_START_VMCALL;
RunPermVM(Index);
if(Index == PeSmiControl.PeCpuIndex) // are we on the VM/PE processor, then start
{
DEBUG((EFI_D_INFO, "%ld VM/PE Manual Start - same processor\n", Index));
PeVmData[PeType].StartMode = PEVM_START_VMCALL;
RunPermVM(Index);
}
else
{
DEBUG((EFI_D_INFO, "%ld VM/PE Manual Start - sending to VM/PE processor: %ld\n",
Index, PeSmiControl.PeCpuIndex));
InterlockedCompareExchange32(&PeSmiControl.PeWaitTimer, 0, 1);
PeVmData[PeType].StartMode = PEVM_PRESTART_SMI;
SetSwSmiTimerRate(0); // 1.5ms
StartSwSmiTimer();
AsmWbinvd();
}
Status = STM_SUCCESS;
return Status;