Reviewed-by: Ray Ni <ray...@intel.com> > -----Original Message----- > From: Sheng, W <w.sh...@intel.com> > Sent: Monday, August 31, 2020 2:38 PM > To: devel@edk2.groups.io > Cc: Ni, Ray <ray...@intel.com>; Chaganty, Rangasai V > <rangasai.v.chaga...@intel.com> > Subject: [PATCH v3 1/3] IntelSiliconPkg/VtdInfo: Add Null Root Entry Table PPI > > 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...@intel.com> > Cc: Rangasai V Chaganty <rangasai.v.chaga...@intel.com> > Signed-off-by: Sheng Wei <w.sh...@intel.com> > --- > .../Include/Ppi/VtdNullRootEntryTable.h | 28 > ++++++++++++++++++++++ > Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dec | 1 + > 2 files changed, 29 insertions(+) > create mode 100644 > Silicon/Intel/IntelSiliconPkg/Include/Ppi/VtdNullRootEntryTable.h > > diff --git a/Silicon/Intel/IntelSiliconPkg/Include/Ppi/VtdNullRootEntryTable.h > b/Silicon/Intel/IntelSiliconPkg/Include/Ppi/VtdNullRootEntryTable.h > new file mode 100644 > index 00000000..d79b5fd9 > --- /dev/null > +++ b/Silicon/Intel/IntelSiliconPkg/Include/Ppi/VtdNullRootEntryTable.h > @@ -0,0 +1,28 @@ > +/** @file > + The definition for VTD Null Root Entry Table PPI. > + > + This is a lightweight VTd null root entry table report in PEI phase. > + > + Copyright (c) 2020, Intel Corporation. All rights reserved.<BR> > + SPDX-License-Identifier: BSD-2-Clause-Patent > + > +**/ > + > +#ifndef __VTD_NULL_ROOT_ENTRY_TABLE_PPI_H__ > +#define __VTD_NULL_ROOT_ENTRY_TABLE_PPI_H__ > + > +#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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