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This commit is contained in:
Satoshi Tanda
2020-02-22 19:54:32 -08:00
parent 791486327d
commit c0a21eb857
13 changed files with 115 additions and 11 deletions
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10
Sources/MiniVisor.c
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@@ -802,6 +802,11 @@ SetupVmcs (
_sgdt(&gdtr);
__sidt(&idtr);
//
// Intercept #DB. This is purely for demonstration and can be removed.
//
exceptionBitmap = (1 << DivideError);
//
// VM-entry and -exit controls define how processor should operate on
// VM-entry and exit. The following configurations are to achieve that:
@@ -845,7 +850,9 @@ SetupVmcs (
// instructions. Those instructions are used in Windows 10. If those are
// not set, attempt to execute them causes #UD, which results in a bug
// check. VPID is enabled, which could lead to better performance for free
// by not flushing all TLB on every VM-exit. Finally, to enable EPT as well.
// by not flushing all TLB on every VM-exit. Finally, to enable EPT and
// unrestricted guest which are required for the UEFI hypervisor to handle
// the real-mode guest.
//
primaryProcBasedControls.Flags = 0;
primaryProcBasedControls.UseMsrBitmaps = TRUE;
@@ -915,7 +922,6 @@ SetupVmcs (
VmxWrite(VMCS_CTRL_EPT_POINTER, VpContext->EptContext.EptPointer.Flags);
/* 32-Bit Control Fields */
exceptionBitmap = (1 << DivideError);
VmxWrite(VMCS_CTRL_EXCEPTION_BITMAP, exceptionBitmap);
VmxWrite(VMCS_CTRL_PIN_BASED_VM_EXECUTION_CONTROLS, pinBasedControls.Flags);
VmxWrite(VMCS_CTRL_PROCESSOR_BASED_VM_EXECUTION_CONTROLS, primaryProcBasedControls.Flags);