REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1547
Only doing IOTLB invalidation would cause a BSOD
'DRIVER_VERIFIER_DMA_VIOLATION' while changing the second
level page entry's attributes. So always do the global
invalidation of context-cache and IOTLB.
Cc: Jiewen Yao <jiewen....@intel.com>
Cc: Ray Ni <ray...@intel.com>
Cc: Rangasai V Chaganty <rangasai.v.chaga...@intel.com>
Cc: Liming Gao <liming....@intel.com>
Signed-off-by: Zhichao Gao <zhichao....@intel.com>
---
IntelSiliconPkg/Feature/VTd/IntelVTdDxe/VtdReg.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/VtdReg.c
b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/VtdReg.c
index 22bf821d2b..d939d9d27e 100644
--- a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/VtdReg.c
+++ b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/VtdReg.c
@@ -139,16 +139,12 @@ InvalidateVtdIOTLBGlobal (
//
// Invalidate the context cache
//
- if (mVtdUnitInformation[VtdIndex].HasDirtyContext) {
- InvalidateContextCache (VtdIndex);
- }
+ InvalidateContextCache (VtdIndex);
//
// Invalidate the IOTLB cache
//
- if (mVtdUnitInformation[VtdIndex].HasDirtyContext ||
mVtdUnitInformation[VtdIndex].HasDirtyPages) {
- InvalidateIOTLB (VtdIndex);
- }
+ InvalidateIOTLB (VtdIndex);
return EFI_SUCCESS;
}
--
2.21.0.windows.1
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