Cc: Star Zeng <[email protected]>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jiewen Yao <[email protected]>
---
IntelSiliconPkg/IntelVTdDxe/DmaProtection.c | 7 +++++--
IntelSiliconPkg/IntelVTdDxe/IntelVTdDxe.c | 4 ++++
IntelSiliconPkg/IntelVTdDxe/IntelVTdDxe.inf | 3 +++
3 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/IntelSiliconPkg/IntelVTdDxe/DmaProtection.c
b/IntelSiliconPkg/IntelVTdDxe/DmaProtection.c
index 82ed4d2..f5de01f 100644
--- a/IntelSiliconPkg/IntelVTdDxe/DmaProtection.c
+++ b/IntelSiliconPkg/IntelVTdDxe/DmaProtection.c
@@ -437,8 +437,11 @@ OnExitBootServices (
{
DEBUG ((DEBUG_INFO, "Vtd OnExitBootServices\n"));
DumpVtdRegsAll ();
- DisableDmar ();
- DumpVtdRegsAll ();
+
+ if ((PcdGet8(PcdVTdPolicyPropertyMask) & BIT1) == 0) {
+ DisableDmar ();
+ DumpVtdRegsAll ();
+ }
}
/**
diff --git a/IntelSiliconPkg/IntelVTdDxe/IntelVTdDxe.c
b/IntelSiliconPkg/IntelVTdDxe/IntelVTdDxe.c
index 24b88c3..64693a8 100644
--- a/IntelSiliconPkg/IntelVTdDxe/IntelVTdDxe.c
+++ b/IntelSiliconPkg/IntelVTdDxe/IntelVTdDxe.c
@@ -352,6 +352,10 @@ IntelVTdInitialize (
EFI_STATUS Status;
EFI_HANDLE Handle;
+ if ((PcdGet8(PcdVTdPolicyPropertyMask) & BIT0) == 0) {
+ return EFI_UNSUPPORTED;
+ }
+
InitializeDmaProtection ();
Handle = NULL;
diff --git a/IntelSiliconPkg/IntelVTdDxe/IntelVTdDxe.inf
b/IntelSiliconPkg/IntelVTdDxe/IntelVTdDxe.inf
index 697932e..d45fd67 100644
--- a/IntelSiliconPkg/IntelVTdDxe/IntelVTdDxe.inf
+++ b/IntelSiliconPkg/IntelVTdDxe/IntelVTdDxe.inf
@@ -73,6 +73,9 @@
gEfiPciEnumerationCompleteProtocolGuid ## CONSUMES
gEdkiiPlatformVTdPolicyProtocolGuid ## SOMETIMES_CONSUMES
+[Pcd]
+ gIntelSiliconPkgTokenSpaceGuid.PcdVTdPolicyPropertyMask ## CONSUMES
+
[Depex]
gEfiPciRootBridgeIoProtocolGuid AND
gEfiAcpiSdtProtocolGuid
--
2.7.4.windows.1
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