diff options
| author | Jiewen Yao <jiewen.yao@intel.com> | 2017-09-21 15:06:46 +0800 |
|---|---|---|
| committer | Jiewen Yao <jiewen.yao@intel.com> | 2017-09-23 16:14:28 +0800 |
| commit | 8be3ff8fb82026b6294b1e203563737bfae76a57 (patch) | |
| tree | 4e2c622a31d33a6f514e3f3ddef141375917011e /IntelSiliconPkg | |
| parent | 73a2fe8b871a84c30f77182c3b56c77893488484 (diff) | |
| download | edk2-8be3ff8fb82026b6294b1e203563737bfae76a57.tar.gz | |
IntelSiliconPkg/dec: Clarify VTdPolicy.
Clarify the VTdPolicy is for both PEI and DXE.
Cc: Star Zeng <star.zeng@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
Diffstat (limited to 'IntelSiliconPkg')
| -rw-r--r-- | IntelSiliconPkg/IntelSiliconPkg.dec | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/IntelSiliconPkg/IntelSiliconPkg.dec b/IntelSiliconPkg/IntelSiliconPkg.dec index 941380a084..b88630d138 100644 --- a/IntelSiliconPkg/IntelSiliconPkg.dec +++ b/IntelSiliconPkg/IntelSiliconPkg.dec @@ -48,8 +48,8 @@ gIntelSiliconPkgTokenSpaceGuid.PcdIntelGraphicsVbtFileGuid|{ 0xa9, 0x2d, 0x75, 0x56, 0x6b, 0xde, 0x95, 0x48, 0x88, 0x19, 0x19, 0x45, 0xb6, 0xb7, 0x6c, 0x22 }|VOID*|0x00000001
## The mask is used to control VTd behavior.<BR><BR>
- # BIT0: Enable IOMMU during boot.
- # BIT1: Enable IOMMU on exit boot service.
+ # BIT0: Enable IOMMU during boot (If DMAR table is installed in DXE. If VTD_INFO_PPI is installed in PEI.)
+ # BIT1: Enable IOMMU when transfer control to OS (ExitBootService in normal boot. EndOfPEI in S3)
# @Prompt The policy for VTd driver behavior.
gIntelSiliconPkgTokenSpaceGuid.PcdVTdPolicyPropertyMask|1|UINT8|0x00000002
|