[edk2-devel] 回复: [edk2-stable202311] [PATCH V4 0/3] OvmfPkg: Update TdVmCall to handle the retry for MapGPA

["gaoliming via groups.io" <gaoliming=byosoft.com.cn@groups.io>]

Jiewen:
  I have gave my reviewed-by for the change in MdePkg. I agree its impact is
small. I think this patch set can be merged for this stable tag. 

Thanks
Liming
> -----邮件原件-----
> 发件人: devel@edk2.groups.io <devel@edk2.groups.io> 代表 Yao, Jiewen
> 发送时间: 2023年11月8日 21:29
> 收件人: devel@edk2.groups.io; Yao, Jiewen <jiewen.yao@intel.com>; Sun,
> CepingX <cepingx.sun@intel.com>; Kinney, Michael D
> <michael.d.kinney@intel.com>; Gao, Liming <gaoliming@byosoft.com.cn>
> 抄送: Aktas, Erdem <erdemaktas@google.com>; James Bottomley
> <jejb@linux.ibm.com>; Xu, Min M <min.m.xu@intel.com>; Tom Lendacky
> <thomas.lendacky@amd.com>; Michael Roth <michael.roth@amd.com>;
> Gerd Hoffmann <kraxel@redhat.com>
> 主题: Re: [edk2-devel] [PATCH V4 0/3] OvmfPkg: Update TdVmCall to handle
> the retry for MapGPA
> 
> Hi Liming and Mike
> Would you please review the MdePkg update?
> 
> This patch was sent before soft freeze.
> I request that it be in 202311 release because this patch is required by
the
> latest KVM/QEMU.
> This patch only impacts Intel TDX, and has no impact to other CC (AMD SEV)
> or non-CC module.
> 
> Thank you
> Yao, Jiewen
> 
> 
> > -----Original Message-----
> > From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Yao,
> Jiewen
> > Sent: Wednesday, November 8, 2023 9:21 PM
> > To: Sun, CepingX <cepingx.sun@intel.com>; devel@edk2.groups.io
> > Cc: Gao, Liming <gaoliming@byosoft.com.cn>; Kinney, Michael D
> > <michael.d.kinney@intel.com>; Aktas, Erdem <erdemaktas@google.com>;
> James
> > Bottomley <jejb@linux.ibm.com>; Xu, Min M <min.m.xu@intel.com>; Tom
> > Lendacky <thomas.lendacky@amd.com>; Michael Roth
> > <michael.roth@amd.com>; Gerd Hoffmann <kraxel@redhat.com>
> > Subject: Re: [edk2-devel] [PATCH V4 0/3] OvmfPkg: Update TdVmCall to
> handle
> > the retry for MapGPA
> >
> > All: Reviewed-by: Jiewen Yao <Jiewen.yao@intel.com>
> >
> >
> > > -----Original Message-----
> > > From: Sun, CepingX <cepingx.sun@intel.com>
> > > Sent: Wednesday, November 8, 2023 7:38 PM
> > > To: devel@edk2.groups.io
> > > Cc: Sun, CepingX <cepingx.sun@intel.com>; Gao, Liming
> > > <gaoliming@byosoft.com.cn>; Kinney, Michael D
> > <michael.d.kinney@intel.com>;
> > > Aktas, Erdem <erdemaktas@google.com>; James Bottomley
> > > <jejb@linux.ibm.com>; Xu, Min M <min.m.xu@intel.com>; Tom Lendacky
> > > <thomas.lendacky@amd.com>; Michael Roth <michael.roth@amd.com>;
> Yao,
> > > Jiewen <jiewen.yao@intel.com>; Gerd Hoffmann <kraxel@redhat.com>
> > > Subject: [PATCH V4 0/3] OvmfPkg: Update TdVmCall to handle the retry
> for
> > > MapGPA
> > >
> > > REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4572
> > >
> > > According to section 3.2 of the [GHCI] spec, if the result is
> > > "TDG.VP.VMCALL_RETRY" for TDG.VP.VMCALL.MapGPA, TD must retry the
> > > mapping for the pages in the region starting at the GPA specified in
r11.
> > >
> > > Currently, TDVF does not properly handle the retry results of MapGPA.
> > > For this, TDVF should update the TdVmCall to return the value in R11
> > > and must retry the mapping for the pages by the value.
> > >
> > > How to verify the retry for MapGPA in TDVF:
> > > Note: Since the range size of MapGPA in QEMU is limited to 64MB and
> > > TDVF always maps 1.5GB( 2GB~3.5GB) MMIO to shared-memory for TD
> guest,
> > > the retry action is triggered always.
> > > Pre-Config:
> > > QEMU:
> > > https://github.com/intel/qemu-tdx/tree/tdx-qemu-upstream | tag:
> tdx-qemu-
> > > upstream-2023.10.20-v8.1.0
> > > KERNEL:
> > > https://github.com/intel/tdx/tree/kvm-upstream-2023.10.16-v6.6-rc2
> > >
> > > Step:
> > > Boot with TD guest and check the log with TdVmcall(MAPGPA), as below:
> > > TdxDxe:SetMemorySharedOrPrivate: Cr3Base=0x0 Physical=0x80000000
> > > Length=0x60000000 Mode=Shared
> > > SetOrClearSharedBit: TdVmcall(MAPGPA) Retry PhysicalAddress is
> > > 8000080000000, MapGpaRetryaddr is 8000084000000
> > >
> > > Reference:
> > > [GHCI]: TDX Guest-Host-Communication Interface v1.0
> > > https://cdrdv2.intel.com/v1/dl/getContent/726790
> > >
> > > v2 changes:
> > >   - Update the code based on the comments of v1 reviewer
> > >   - Update TdVmcall to instead of the extra API file
> > >
> > > v3 changes:
> > >   - Move the definition of TDVMCALL_STATUS_RETRY to Tdx.h
> > >
> > > v4 changes:
> > >   - Split the patch to MdePkg update and OvmfPkg update.
> > >
> > > code: https://github.com/sunceping/edk2/tree/handleRetryMapGPA.v4
> > >
> > > Cc: Liming Gao <gaoliming@byosoft.com.cn>
> > > Cc: Michael D Kinney <michael.d.kinney@intel.com>
> > > Cc: Erdem Aktas <erdemaktas@google.com>
> > > Cc: James Bottomley <jejb@linux.ibm.com>
> > > Cc: Min Xu <min.m.xu@intel.com>
> > > Cc: Tom Lendacky <thomas.lendacky@amd.com>
> > > Cc: Michael Roth <michael.roth@amd.com>
> > > Cc: Jiewen Yao <jiewen.yao@intel.com>
> > > Acked-by: Gerd Hoffmann <kraxel@redhat.com>
> > > Signed-off-by: Ceping Sun <cepingx.sun@intel.com>
> > >
> > > Ceping Sun (3):
> > >   MdePkg/BaseLib: Update TdVmcall to always output the value in R11
> > >   MdePkg/Tdx.h: Add TDVMCALL_STATUS_RETRY
> > >   OvmfPkg/BaseMemEncryptTdxLib: Handle retry result of MapGPA
> > >
> > >  MdePkg/Include/IndustryStandard/Tdx.h         |  2 +
> > >  MdePkg/Library/BaseLib/X64/TdVmcall.nasm      |  4 +-
> > >  .../BaseMemEncryptTdxLib/MemoryEncryption.c   | 41
> ++++++++++++++++++-
> > >  3 files changed, 43 insertions(+), 4 deletions(-)
> > >
> > > --
> > > 2.34.1
> >
> >
> >
> >
> >
> 
> 
> 
> 
> 





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