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authorBrijesh Singh <brijesh.singh@amd.com>2017-07-06 09:28:40 -0400
committerJordan Justen <jordan.l.justen@intel.com>2017-07-10 21:17:28 -0700
commitf9d129e68a453790420a0b5d6400fa81a317c58f (patch)
tree9fa7df981d35bd055c13bcf1b1f745f00697d014 /OvmfPkg/OvmfPkgIa32.dsc
parent6c22e534beaabad5856609a86d009f3818989a4b (diff)
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OvmfPkg: Add IoMmuDxe driver
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. Due to security reasons all DMA operations inside the SEV guest must be performed on shared (i.e unencrypted) pages. The IOMMU protocol driver for the SEV guest uses a bounce buffer to map guest DMA buffer to shared pages inorder to provide the support for DMA operations inside SEV guest. IoMmuDxe driver looks for SEV capabilities, if present then it installs the real IOMMU protocol otherwise it installs placeholder protocol. Currently, PciHostBridgeDxe and QemuFWCfgLib need to know the existance of IOMMU protocol. The modules needing to know the existance of IOMMU support should add gEdkiiIoMmuProtocolGuid OR gIoMmuAbsentProtocolGuid in their depex to ensure that platform IOMMU detection has been performed. Cc: Jordan Justen <jordan.l.justen@intel.com> Cc: Laszlo Ersek <lersek@redhat.com> Cc: Leo Duran <leo.duran@amd.com> Cc: Jiewen Yao <jiewen.yao@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Suggested-by: Jiewen Yao <jiewen.yao@intel.com> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com> Acked-by: Laszlo Ersek <lersek@redhat.com> Acked-by: Jordan Justen <jordan.l.justen@intel.com>
Diffstat (limited to 'OvmfPkg/OvmfPkgIa32.dsc')
-rw-r--r--OvmfPkg/OvmfPkgIa32.dsc1
1 files changed, 1 insertions, 0 deletions
diff --git a/OvmfPkg/OvmfPkgIa32.dsc b/OvmfPkg/OvmfPkgIa32.dsc
index 9355a37ae9..6a3e400cab 100644
--- a/OvmfPkg/OvmfPkgIa32.dsc
+++ b/OvmfPkg/OvmfPkgIa32.dsc
@@ -816,6 +816,7 @@
!endif
OvmfPkg/PlatformDxe/Platform.inf
+ OvmfPkg/IoMmuDxe/IoMmuDxe.inf
!if $(SMM_REQUIRE) == TRUE
OvmfPkg/SmmAccess/SmmAccess2Dxe.inf