From 25201821229e84197643053e9de595e512268616 Mon Sep 17 00:00:00 2001 From: Min Xu Date: Wed, 22 Sep 2021 20:49:05 +0800 Subject: OvmfPkg: Update IoMmuDxe to support TDX RFC: https://bugzilla.tianocore.org/show_bug.cgi?id=3429 The IOMMU protocol driver provides capabilities to set a DMA access attribute and methods to allocate, free, map and unmap the DMA memory for the PCI Bus devices. The current IoMmuDxe driver supports DMA operations inside SEV guest. To support DMA operation in TDX guest, CC_GUEST_IS_XXX (PcdConfidentialComputingGuestAttr) is used to determine if it is SEV guest or TDX guest. Due to security reasons all DMA operations inside the SEV/TDX guest must be performed on shared pages. The IOMMU protocol driver for the SEV/TDX guest uses a bounce buffer to map guest DMA buffer to shared pages in order to provide the support for DMA operations inside SEV/TDX guest. The call of SEV or TDX specific function to set/clear EncMask/SharedBit is determined by CC_GUEST_IS_XXX (PcdConfidentialComputingGuestAttr). Cc: Ard Biesheuvel Cc: Jordan Justen Cc: Brijesh Singh Cc: Erdem Aktas Cc: James Bottomley Cc: Jiewen Yao Cc: Tom Lendacky Cc: Gerd Hoffmann Acked-by: Gerd Hoffmann Reviewed-by: Jiewen Yao Signed-off-by: Min Xu --- OvmfPkg/OvmfXen.dsc | 1 + 1 file changed, 1 insertion(+) (limited to 'OvmfPkg/OvmfXen.dsc') diff --git a/OvmfPkg/OvmfXen.dsc b/OvmfPkg/OvmfXen.dsc index 470c8cf..78d1509 100644 --- a/OvmfPkg/OvmfXen.dsc +++ b/OvmfPkg/OvmfXen.dsc @@ -170,6 +170,7 @@ LockBoxLib|OvmfPkg/Library/LockBoxLib/LockBoxBaseLib.inf CustomizedDisplayLib|MdeModulePkg/Library/CustomizedDisplayLib/CustomizedDisplayLib.inf FrameBufferBltLib|MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.inf + MemEncryptTdxLib|OvmfPkg/Library/BaseMemEncryptTdxLib/BaseMemEncryptTdxLib.inf !if $(SOURCE_DEBUG_ENABLE) == TRUE PeCoffExtraActionLib|SourceLevelDebugPkg/Library/PeCoffExtraActionLibDebug/PeCoffExtraActionLibDebug.inf -- cgit v1.1