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 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#64816): https://edk2.groups.io/g/devel/message/64816 Mute This Topic: https://groups.io/mt/76529333/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
