From: "Gerd Hoffmann" <kraxel@redhat.com>
To: Min Xu <min.m.xu@intel.com>
Cc: devel@edk2.groups.io, Ard Biesheuvel <ardb+tianocore@kernel.org>,
Jordan Justen <jordan.l.justen@intel.com>,
Brijesh Singh <brijesh.singh@amd.com>,
Erdem Aktas <erdemaktas@google.com>,
James Bottomley <jejb@linux.ibm.com>,
Jiewen Yao <jiewen.yao@intel.com>,
Tom Lendacky <thomas.lendacky@amd.com>
Subject: Re: [PATCH V4 27/31] OvmfPkg: Update IoMmuDxe to support TDX
Date: Wed, 15 Dec 2021 10:18:49 +0100 [thread overview]
Message-ID: <20211215091849.uumo6bubqownvxpa@sirius.home.kraxel.org> (raw)
In-Reply-To: <329c6fdb80d1277504ff4cf55ddc9e528fbe8091.1639399598.git.min.m.xu@intel.com>
On Mon, Dec 13, 2021 at 08:56:58PM +0800, Min Xu wrote:
> 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 <ardb+tianocore@kernel.org>
> Cc: Jordan Justen <jordan.l.justen@intel.com>
> Cc: Brijesh Singh <brijesh.singh@amd.com>
> Cc: Erdem Aktas <erdemaktas@google.com>
> Cc: James Bottomley <jejb@linux.ibm.com>
> Cc: Jiewen Yao <jiewen.yao@intel.com>
> Cc: Tom Lendacky <thomas.lendacky@amd.com>
> Cc: Gerd Hoffmann <kraxel@redhat.com>
> Signed-off-by: Min Xu <min.m.xu@intel.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
next prev parent reply other threads:[~2021-12-15 9:18 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-13 12:56 [PATCH V4 00/31] Enable Intel TDX in OvmfPkg (Config-A) Min Xu
2021-12-13 12:56 ` [PATCH V4 01/31] MdePkg: Add Tdx.h Min Xu
2021-12-13 12:56 ` [PATCH V4 02/31] MdePkg: Introduce basic Tdx functions in BaseLib Min Xu
2021-12-15 6:33 ` Gerd Hoffmann
2021-12-13 12:56 ` [PATCH V4 03/31] MdePkg: Add TdxLib to wrap Tdx operations Min Xu
2021-12-15 6:44 ` Gerd Hoffmann
2021-12-13 12:56 ` [PATCH V4 04/31] UefiCpuPkg: Extend VmgExitLibNull to handle #VE exception Min Xu
2021-12-13 12:56 ` [PATCH V4 05/31] OvmfPkg: Extend VmgExitLib " Min Xu
2021-12-15 6:56 ` [edk2-devel] " Gerd Hoffmann
2022-01-20 6:34 ` Min Xu
2021-12-13 12:56 ` [PATCH V4 06/31] UefiCpuPkg/CpuExceptionHandler: Add base support for the " Min Xu
2021-12-13 12:56 ` [PATCH V4 07/31] MdePkg: Add helper functions for Tdx guest in BaseIoLibIntrinsic Min Xu
2021-12-13 12:56 ` [PATCH V4 08/31] MdePkg: Support mmio " Min Xu
2021-12-15 7:02 ` Gerd Hoffmann
2021-12-13 12:56 ` [PATCH V4 09/31] MdePkg: Support IoFifo " Min Xu
2021-12-15 7:18 ` Gerd Hoffmann
2021-12-13 12:56 ` [PATCH V4 10/31] MdePkg: Support IoRead/IoWrite " Min Xu
2021-12-15 7:18 ` Gerd Hoffmann
2021-12-13 12:56 ` [PATCH V4 11/31] UefiCpuPkg: Support TDX in BaseXApicX2ApicLib Min Xu
2021-12-13 12:56 ` [PATCH V4 12/31] MdePkg: Add macro to check SEV / TDX guest Min Xu
2021-12-13 12:56 ` [PATCH V4 13/31] UefiCpuPkg: Enable Tdx support in MpInitLib Min Xu
2021-12-15 7:33 ` Gerd Hoffmann
2021-12-13 12:56 ` [PATCH V4 14/31] OvmfPkg: Add IntelTdx.h in OvmfPkg/Include/IndustryStandard Min Xu
2021-12-15 7:37 ` Gerd Hoffmann
2021-12-16 6:43 ` Min Xu
2021-12-13 12:56 ` [PATCH V4 15/31] OvmfPkg: Add TdxMailboxLib Min Xu
2021-12-15 7:47 ` Gerd Hoffmann
2021-12-13 12:56 ` [PATCH V4 16/31] MdePkg: Add EFI_RESOURCE_ATTRIBUTE_ENCRYPTED in PiHob.h Min Xu
2021-12-13 12:56 ` [PATCH V4 17/31] OvmfPkg: Update Sec to support Tdx Min Xu
2021-12-15 8:18 ` Gerd Hoffmann
2021-12-16 8:11 ` [edk2-devel] " Min Xu
2021-12-13 12:56 ` [PATCH V4 18/31] OvmfPkg: Check Tdx in QemuFwCfgPei to avoid DMA operation Min Xu
2021-12-15 8:19 ` Gerd Hoffmann
2021-12-13 12:56 ` [PATCH V4 19/31] MdeModulePkg: EFER should not be changed in TDX Min Xu
2021-12-13 12:56 ` [PATCH V4 20/31] MdeModulePkg: Add PcdTdxSharedBitMask Min Xu
2021-12-15 8:22 ` Gerd Hoffmann
2021-12-13 12:56 ` [PATCH V4 21/31] UefiCpuPkg: Update AddressEncMask in CpuPageTable Min Xu
2021-12-15 8:38 ` Gerd Hoffmann
2021-12-16 8:23 ` Min Xu
2021-12-13 12:56 ` [PATCH V4 22/31] OvmfPkg: Update PlatformPei to support TDX Min Xu
2021-12-15 8:53 ` Gerd Hoffmann
2022-01-20 9:07 ` [edk2-devel] " Min Xu
2022-01-13 19:18 ` Vishal Annapurve
2022-01-14 2:23 ` Min Xu
2022-01-14 2:37 ` Vishal Annapurve
2022-01-14 2:40 ` Min Xu
2021-12-13 12:56 ` [PATCH V4 23/31] OvmfPkg: Update AcpiPlatformDxe to alter MADT table Min Xu
2021-12-15 8:54 ` Gerd Hoffmann
2021-12-13 12:56 ` [PATCH V4 24/31] OvmfPkg: Add TdxDxe driver Min Xu
2021-12-15 9:05 ` Gerd Hoffmann
2021-12-13 12:56 ` [PATCH V4 25/31] OvmfPkg/BaseMemEncryptTdxLib: Add TDX helper library Min Xu
2021-12-15 9:16 ` Gerd Hoffmann
2022-01-21 2:54 ` Min Xu
2022-01-21 8:04 ` Gerd Hoffmann
2022-01-21 8:31 ` [edk2-devel] " Min Xu
2021-12-13 12:56 ` [PATCH V4 26/31] OvmfPkg/QemuFwCfgLib: Support Tdx in QemuFwCfgDxe Min Xu
2021-12-15 9:16 ` Gerd Hoffmann
2021-12-13 12:56 ` [PATCH V4 27/31] OvmfPkg: Update IoMmuDxe to support TDX Min Xu
2021-12-15 9:18 ` Gerd Hoffmann [this message]
2021-12-13 12:56 ` [PATCH V4 28/31] OvmfPkg: Rename XenTimerDxe to LocalApicTimerDxe Min Xu
2021-12-15 9:19 ` Gerd Hoffmann
2021-12-13 12:57 ` [PATCH V4 29/31] UefiCpuPkg: Setting initial-count register as the last step Min Xu
2021-12-15 9:20 ` Gerd Hoffmann
2021-12-13 12:57 ` [PATCH V4 30/31] OvmfPkg: Switch timer in build time for OvmfPkg Min Xu
2021-12-15 9:21 ` Gerd Hoffmann
2021-12-13 12:57 ` [PATCH V4 31/31] OvmfPkg: Move LocalApicTimerDxe to UefiCpuPkg Min Xu
2021-12-15 9:26 ` Gerd Hoffmann
2021-12-16 8:29 ` [edk2-devel] " Min Xu
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