[edk2-devel] [PATCH v2 1/3] IntelSiliconPkg/VtdInfo: Add Null Root Entry Table PPI

[Sheng Wei]

Null root entry table address is a fixed silicon reserved address,
which is used to block the DMA transfer.

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2867

Change-Id: I3aa2b2e7a11e0327857c6ed9bc92cd209d3ade9d
Cc: Ray Ni <ray.ni at intel.com>
Cc: Rangasai V Chaganty <rangasai.v.chaganty at intel.com>
Signed-off-by: Sheng Wei <w.sheng at intel.com>
---
 Silicon/Intel/IntelSiliconPkg/Include/Ppi/VtdInfo.h | 13 +++++++++++++
 Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dec   |  1 +
 2 files changed, 14 insertions(+)

diff --git a/Silicon/Intel/IntelSiliconPkg/Include/Ppi/VtdInfo.h b/Silicon/Intel/IntelSiliconPkg/Include/Ppi/VtdInfo.h
index f91dbc03..7d638b4f 100644
--- a/Silicon/Intel/IntelSiliconPkg/Include/Ppi/VtdInfo.h
+++ b/Silicon/Intel/IntelSiliconPkg/Include/Ppi/VtdInfo.h
@@ -33,5 +33,18 @@ typedef EFI_ACPI_DMAR_HEADER EDKII_VTD_INFO_PPI;
 
 extern EFI_GUID gEdkiiVTdInfoPpiGuid;
 
+#define EDKII_VTD_NULL_ROOT_ENTRY_TABLE_PPI_GUID \
+    { \
+      0x3de0593f, 0x6e3e, 0x4542, { 0xa1, 0xcb, 0xcb, 0xb2, 0xdb, 0xeb, 0xd8, 0xff } \
+    }
+
+//
+// Null root entry table address is a fixed silicon reserved address,
+//   which is used to block the DMA transfer.
+//
+typedef UINT64  EDKII_VTD_NULL_ROOT_ENTRY_TABLE_PPI;
+
+extern EFI_GUID gEdkiiVTdNullRootEntryTableGuid;
+
 #endif
 
diff --git a/Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dec b/Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dec
index e4a7fec3..284820af 100644
--- a/Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dec
+++ b/Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dec
@@ -68,6 +68,7 @@
 
 [Ppis]
   gEdkiiVTdInfoPpiGuid = { 0x8a59fcb3, 0xf191, 0x400c, { 0x97, 0x67, 0x67, 0xaf, 0x2b, 0x25, 0x68, 0x4a } }
+  gEdkiiVTdNullRootEntryTableGuid = { 0x3de0593f, 0x6e3e, 0x4542, { 0xa1, 0xcb, 0xcb, 0xb2, 0xdb, 0xeb, 0xd8, 0xff } }
 
 [Protocols]
   gEdkiiPlatformVTdPolicyProtocolGuid = { 0x3d17e448, 0x466, 0x4e20, { 0x99, 0x9f, 0xb2, 0xe1, 0x34, 0x88, 0xee, 0x22 }}
-- 
2.16.2.windows.1


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