BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3904
TdxDxe driver is introduced for Intel TDX feature. Unfortunately, this
driver also breaks boot process in SEV-ES guest. The root cause is in
the PciLib which is imported by TdxDxe driver.
In a SEV-ES guest the AmdSevDxe driver performs a
Mem
o
> Cc: Xu, Min M ; Brijesh Singh ;
> Aktas, Erdem ; James Bottomley
> ; Yao, Jiewen ; Tom Lendacky
>
> Subject: [edk2-devel] [PATCH] OvmfPkg: Set PciLib for TdxDxe driver
>
> BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3904
>
> TdxDxe driver is introduced for Intel TD
On April 19, 2022 10:08 AM, Yao Jiewen wrote:
>
> If TdxDxe breaks SEV, should we skip the TdxDxe in SEV path?
>
> I don't understand why we need use Cfg8.
>
In TdxDxe driver we need to relocate APs and it requires the TdxMailboxLib.
The lib chain is that TdxMailbox -> SynchronizationLib -> Ti
> To: Yao, Jiewen ; devel@edk2.groups.io
> Cc: Brijesh Singh ; Aktas, Erdem
> ; James Bottomley ; Tom
> Lendacky
> Subject: RE: [edk2-devel] [PATCH] OvmfPkg: Set PciLib for TdxDxe driver
>
> On April 19, 2022 10:08 AM, Yao Jiewen wrote:
> >
> > If TdxDxe breaks
On April 19, 2022 10:54 AM, Yao Jiewen wrote:
>
> Why does TdxDxe call TdxMailbox in an SEV platform?
> Or why does TdxMailbox call SynchronizationLib in an SEV platform?
>
TdxDxe will not call TdxMailbox/SynchronizationLib in SEV platform. The problem
is in the lib constructor. When TdxDxe drive
y ; Tom
> Lendacky
> Subject: RE: [edk2-devel] [PATCH] OvmfPkg: Set PciLib for TdxDxe driver
>
> On April 19, 2022 10:54 AM, Yao Jiewen wrote:
> >
> > Why does TdxDxe call TdxMailbox in an SEV platform?
> > Or why does TdxMailbox call SynchronizationLib in an SEV
-
> From: Yao, Jiewen
> Sent: Tuesday, April 19, 2022 12:16 PM
> To: Xu, Min M ; devel@edk2.groups.io
> Cc: Brijesh Singh ; Aktas, Erdem
> ; James Bottomley ; Tom
> Lendacky
> Subject: RE: [edk2-devel] [PATCH] OvmfPkg: Set PciLib for TdxDxe driver
>
> Do you mean, with SEV
Erdem
> ; James Bottomley ; Tom
> Lendacky
> Subject: RE: [edk2-devel] [PATCH] OvmfPkg: Set PciLib for TdxDxe driver
>
> In AmdSevDxe's entry point it clears the C-bit from PcdPciExpressBaseAddress
> and other memory spaces if needed. Please see
> https://github.com/tia
; James Bottomley ; Tom
> Lendacky
> Subject: Re: [edk2-devel] [PATCH] OvmfPkg: Set PciLib for TdxDxe driver
>
> Can SEV clear the C-bit in SEC phase?
>
> I think that is right way to ensure PCI Express can always be accessed by
> anyone.
>
>
> > -Orig
anyone.
-Original Message-
From: Xu, Min M
Sent: Tuesday, April 19, 2022 12:39 PM
To: Yao, Jiewen ; devel@edk2.groups.io
Cc: Brijesh Singh ; Aktas, Erdem
; James Bottomley ; Tom
Lendacky
Subject: RE: [edk2-devel] [PATCH] OvmfPkg: Set PciLib for TdxDxe driver
In AmdSevDxe's entry poi
Erdem
; James Bottomley ; Tom
Lendacky
Subject: RE: [edk2-devel] [PATCH] OvmfPkg: Set PciLib for TdxDxe driver
In AmdSevDxe's entry point it clears the C-bit from PcdPciExpressBaseAddress
and other memory spaces if needed. Please see
https://github.com/tianocore/edk2/blob/master/OvmfPkg
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