gIntelSiliconPkgTokenSpaceGuid.PcdIntelGraphicsVbtFileGuid|{ 0xa9, 0x2d, 0x75, 0x56, 0x6b, 0xde, 0x95, 0x48, 0x88, 0x19, 0x19, 0x45, 0xb6, 0xb7, 0x6c, 0x22 }|VOID*|0x00000001\r
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## The mask is used to control VTd behavior.<BR><BR>\r
- # BIT0: Enable IOMMU during boot.\r
- # BIT1: Enable IOMMU on exit boot service.\r
+ # BIT0: Enable IOMMU during boot (If DMAR table is installed in DXE. If VTD_INFO_PPI is installed in PEI.)\r
+ # BIT1: Enable IOMMU when transfer control to OS (ExitBootService in normal boot. EndOfPEI in S3)\r
# @Prompt The policy for VTd driver behavior.\r
gIntelSiliconPkgTokenSpaceGuid.PcdVTdPolicyPropertyMask|1|UINT8|0x00000002\r
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