From: "Brijesh Singh" <brijesh.singh@amd.com>
To: "Xu, Min M" <min.m.xu@intel.com>, Gerd Hoffmann <kraxel@redhat.com>
Cc: "devel@edk2.groups.io" <devel@edk2.groups.io>,
Ard Biesheuvel <ardb+tianocore@kernel.org>,
"Justen, Jordan L" <jordan.l.justen@intel.com>,
Erdem Aktas <erdemaktas@google.com>,
James Bottomley <jejb@linux.ibm.com>,
"Yao, Jiewen" <jiewen.yao@intel.com>,
"Lendacky, Thomas" <Thomas.Lendacky@amd.com>
Subject: Re: [PATCH V3 20/29] OvmfPkg: Check Tdx in QemuFwCfgPei to avoid DMA operation
Date: Thu, 4 Nov 2021 14:36:16 +0000 [thread overview]
Message-ID: <SN6PR12MB27189063878F3995C68CF5E0E58D9@SN6PR12MB2718.namprd12.prod.outlook.com> (raw)
In-Reply-To: <PH0PR11MB5064A07D6463AED62FFC127EC58C9@PH0PR11MB5064.namprd11.prod.outlook.com>
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[AMD Official Use Only]
Hi Min,
I am good with Gerd suggestion. Now that we have workarea containing the guest type, I can sure summit a patch to simplify the checks greatly. I am waiting for the UefiCpuPkg maintainers to ack our SNP series so that I can start building/cleaning other stuff.
Thanks
Brijesh
________________________________
From: Xu, Min M <min.m.xu@intel.com>
Sent: Wednesday, November 3, 2021 8:35 AM
To: Gerd Hoffmann <kraxel@redhat.com>; Singh, Brijesh <brijesh.singh@amd.com>
Cc: devel@edk2.groups.io <devel@edk2.groups.io>; Ard Biesheuvel <ardb+tianocore@kernel.org>; Justen, Jordan L <jordan.l.justen@intel.com>; Singh, Brijesh <brijesh.singh@amd.com>; Erdem Aktas <erdemaktas@google.com>; James Bottomley <jejb@linux.ibm.com>; Yao, Jiewen <jiewen.yao@intel.com>; Lendacky, Thomas <Thomas.Lendacky@amd.com>
Subject: RE: [PATCH V3 20/29] OvmfPkg: Check Tdx in QemuFwCfgPei to avoid DMA operation
On November 3, 2021 2:51 PM, Gerd Hoffmann wrote:
> > +/**
> > + Check if it is Tdx guest
> > +
> > + @retval TRUE It is Tdx guest
> > + @retval FALSE It is not Tdx guest
> > +**/
> > +BOOLEAN
> > +QemuFwCfgIsTdxGuest (
>
> QemuFwCfgIsCC()
>
> > + return (CcWorkAreaHeader != NULL && CcWorkAreaHeader-
> >GuestType == GUEST_TYPE_INTEL_TDX);
>
> GuestType != GUEST_TYPE_NON_ENCRYPTED
>
> > if (MemEncryptSevIsEnabled ()) {
> > DEBUG ((DEBUG_INFO, "SEV: QemuFwCfg fallback to IO Port
> interface.\n"));
> > + } else if (QemuFwCfgIsTdxGuest ()) {
>
> if (QemuFwCfgIsCC()
>
Hi, Gerd
I re-check the MemEncryptSevIsEnabled() and it doesn't simply check the GuestType. Instead it does more checking.
See https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Ftianocore%2Fedk2%2Fblob%2Fmaster%2FOvmfPkg%2FLibrary%2FBaseMemEncryptSevLib%2FPeiMemEncryptSevLibInternal.c%23L34-L88&data=04%7C01%7Cbrijesh.singh%40amd.com%7Ce9ff44a121444737aa8d08d99ecedcd6%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637715433574095127%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=h2q2P79zm%2FfF44q35%2FGFmVI%2BOShQGwdNIUEZZSToM%2FQ%3D&reserved=0
Brijesh, what's your thought about Gerd's suggestion?
Thanks
Min
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next prev parent reply other threads:[~2021-11-04 14:36 UTC|newest]
Thread overview: 107+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-01 13:15 [PATCH V3 00/29] Enable Intel TDX in OvmfPkg (Config-A) Min Xu
2021-11-01 13:15 ` [PATCH V3 01/29] MdePkg: Add Tdx.h Min Xu
2021-11-01 13:15 ` [PATCH V3 02/29] MdePkg: Add TdxLib to wrap Tdx operations Min Xu
2021-11-02 14:06 ` Gerd Hoffmann
2021-11-10 4:58 ` [edk2-devel] " Min Xu
2021-11-10 10:38 ` Erdem Aktas
2021-11-12 2:38 ` Min Xu
2021-11-12 2:42 ` Yao, Jiewen
2021-11-12 5:29 ` Min Xu
2021-11-12 5:33 ` Yao, Jiewen
2021-11-01 13:15 ` [PATCH V3 03/29] UefiCpuPkg: Extend VmgExitLibNull to handle #VE exception Min Xu
2021-11-02 14:11 ` Gerd Hoffmann
2021-11-01 13:15 ` [PATCH V3 04/29] OvmfPkg: Extend VmgExitLib " Min Xu
2021-11-02 14:23 ` Gerd Hoffmann
2021-11-10 6:46 ` Min Xu
2021-11-17 0:32 ` Erdem Aktas
2021-11-01 13:15 ` [PATCH V3 05/29] UefiCpuPkg/CpuExceptionHandler: Add base support for the " Min Xu
2021-11-02 14:24 ` Gerd Hoffmann
2021-11-01 13:15 ` [PATCH V3 06/29] MdePkg: Add helper functions for Tdx guest in BaseIoLibIntrinsic Min Xu
2021-11-01 13:15 ` [PATCH V3 07/29] MdePkg: Support mmio " Min Xu
2021-11-01 13:15 ` [PATCH V3 08/29] MdePkg: Support IoFifo " Min Xu
2021-11-01 13:15 ` [PATCH V3 09/29] MdePkg: Support IoRead/IoWrite " Min Xu
2021-11-01 13:15 ` [PATCH V3 10/29] UefiPayloadPkg: PreparePrepare UefiPayloadPkg to use TdxLib Min Xu
2021-11-01 15:31 ` Guo Dong
2021-11-01 15:58 ` Ma, Maurice
2021-11-02 0:07 ` Min Xu
2021-11-02 14:32 ` Gerd Hoffmann
2021-11-01 13:16 ` [PATCH V3 11/29] UefiCpuPkg: Support TDX in BaseXApicX2ApicLib Min Xu
2021-11-02 14:33 ` Gerd Hoffmann
2021-11-01 13:16 ` [PATCH V3 12/29] UefiCpuPkg: Define ConfidentialComputingGuestAttr Min Xu
2021-11-02 14:36 ` Gerd Hoffmann
2021-11-03 8:32 ` [edk2-devel] " Min Xu
2021-11-01 13:16 ` [PATCH V3 13/29] MdePkg: Add macro to check SEV/TDX guest Min Xu
2021-11-02 14:36 ` Gerd Hoffmann
2021-11-01 13:16 ` [PATCH V3 14/29] UefiCpuPkg: Enable Tdx support in MpInitLib Min Xu
2021-11-03 6:09 ` Gerd Hoffmann
2021-11-03 12:57 ` Min Xu
2021-11-04 8:10 ` Gerd Hoffmann
2021-11-04 15:21 ` Lendacky, Thomas
2021-11-04 23:24 ` Min Xu
2021-11-05 6:46 ` [edk2-devel] " Gerd Hoffmann
2021-11-05 6:53 ` Min Xu
2021-11-09 2:44 ` Min Xu
2021-11-01 13:16 ` [PATCH V3 15/29] OvmfPkg: Update SecEntry.nasm to support Tdx Min Xu
2021-11-03 6:30 ` Gerd Hoffmann
2021-11-16 12:11 ` Min Xu
2021-11-17 15:19 ` Gerd Hoffmann
2021-11-18 9:59 ` Yao, Jiewen
2021-11-19 15:11 ` Gerd Hoffmann
2021-11-20 3:18 ` Yao, Jiewen
2021-11-23 12:38 ` Gerd Hoffmann
2021-11-23 13:07 ` Yao, Jiewen
2021-11-23 14:26 ` James Bottomley
2021-11-23 14:36 ` Yao, Jiewen
2021-11-23 14:51 ` James Bottomley
2021-11-23 15:10 ` Yao, Jiewen
2021-11-23 15:37 ` [edk2-devel] " James Bottomley
2021-11-24 3:15 ` Yao, Jiewen
2021-11-24 8:12 ` Gerd Hoffmann
2021-11-24 11:08 ` Yao, Jiewen
2021-11-24 13:35 ` James Bottomley
2021-11-24 14:03 ` Yao, Jiewen
2021-11-24 14:07 ` James Bottomley
2021-11-24 14:59 ` Yao, Jiewen
2021-11-25 8:32 ` Gerd Hoffmann
2021-11-26 6:29 ` Yao, Jiewen
2021-12-01 13:55 ` Gerd Hoffmann
2021-12-02 13:22 ` Yao, Jiewen
2021-12-06 14:57 ` Gerd Hoffmann
2021-12-07 2:28 ` Yao, Jiewen
2021-12-07 8:04 ` Gerd Hoffmann
2021-12-08 5:13 ` Min Xu
[not found] ` <16BA8381113E7B1B.22735@groups.io>
2021-11-24 15:30 ` Yao, Jiewen
[not found] ` <16BA5D1709524394.9880@groups.io>
2021-11-24 3:21 ` Yao, Jiewen
2021-11-01 13:16 ` [PATCH V3 16/29] OvmfPkg: Add IntelTdx.h in OvmfPkg/Include/IndustryStandard Min Xu
2021-11-01 13:16 ` [PATCH V3 17/29] OvmfPkg: Add TdxMailboxLib Min Xu
2021-11-01 13:16 ` [PATCH V3 18/29] MdePkg: Add EFI_RESOURCE_ATTRIBUTE_ENCRYPTED in PiHob.h Min Xu
2021-11-01 13:16 ` [PATCH V3 19/29] OvmfPkg: Enable Tdx in SecMain.c Min Xu
2021-11-01 13:16 ` [PATCH V3 20/29] OvmfPkg: Check Tdx in QemuFwCfgPei to avoid DMA operation Min Xu
2021-11-03 6:50 ` Gerd Hoffmann
2021-11-03 13:07 ` Min Xu
2021-11-03 13:35 ` Min Xu
2021-11-04 14:36 ` Brijesh Singh [this message]
2021-11-01 13:16 ` [PATCH V3 21/29] MdeModulePkg: EFER should not be changed in TDX Min Xu
2021-11-03 6:51 ` Gerd Hoffmann
2021-11-01 13:16 ` [PATCH V3 22/29] MdeModulePkg: Set shared bit in Mmio region for Tdx guest Min Xu
2021-11-03 6:57 ` Gerd Hoffmann
2021-11-04 7:03 ` [edk2-devel] " Min Xu
2021-11-01 13:16 ` [PATCH V3 23/29] UefiCpuPkg: Update AddressEncMask in CpuPageTable Min Xu
2021-11-03 7:00 ` Gerd Hoffmann
2021-11-22 3:09 ` [edk2-devel] " Ni, Ray
2021-12-07 3:50 ` Min Xu
2021-12-07 7:15 ` Gerd Hoffmann
2021-11-01 13:16 ` [PATCH V3 24/29] OvmfPkg: Update PlatformPei to support TDX Min Xu
2021-11-01 13:16 ` [PATCH V3 25/29] OvmfPkg: Update AcpiPlatformDxe to alter MADT table Min Xu
2021-11-01 13:16 ` [PATCH V3 26/29] OvmfPkg: Add TdxDxe driver Min Xu
2021-11-01 13:16 ` [PATCH V3 27/29] OvmfPkg/BaseMemEncryptTdxLib: Add TDX helper library Min Xu
2021-11-03 7:10 ` Gerd Hoffmann
2021-12-08 8:37 ` [edk2-devel] " Min Xu
2021-11-01 13:16 ` [PATCH V3 28/29] OvmfPkg/QemuFwCfgLib: Support Tdx in QemuFwCfgDxe Min Xu
2021-11-03 7:12 ` Gerd Hoffmann
2021-12-13 2:06 ` Min Xu
2021-11-01 13:16 ` [PATCH V3 29/29] OvmfPkg: Update IoMmuDxe to support TDX Min Xu
2021-11-03 7:17 ` Gerd Hoffmann
2021-12-13 2:39 ` [edk2-devel] " Min Xu
2021-12-13 6:42 ` Gerd Hoffmann
2021-12-13 7:33 ` Min Xu
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