linux-kernel - Re: [PATCH v12 18/29] KVM: SEV: Use a VMSA physical address variable for populating VMCB

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Message-ID: <67685ec7-ca61-43f1-8ecd-120ec137e93a@redhat.com>
Date: Sat, 30 Mar 2024 22:01:35 +0100
From: Paolo Bonzini <pbonzini@...hat.com>
To: Michael Roth <michael.roth@....com>, kvm@...r.kernel.org
Cc: linux-coco@...ts.linux.dev, linux-mm@...ck.org,
 linux-crypto@...r.kernel.org, x86@...nel.org, linux-kernel@...r.kernel.org,
 tglx@...utronix.de, mingo@...hat.com, jroedel@...e.de,
 thomas.lendacky@....com, hpa@...or.com, ardb@...nel.org, seanjc@...gle.com,
 vkuznets@...hat.com, jmattson@...gle.com, luto@...nel.org,
 dave.hansen@...ux.intel.com, slp@...hat.com, pgonda@...gle.com,
 peterz@...radead.org, srinivas.pandruvada@...ux.intel.com,
 rientjes@...gle.com, dovmurik@...ux.ibm.com, tobin@....com, bp@...en8.de,
 vbabka@...e.cz, kirill@...temov.name, ak@...ux.intel.com,
 tony.luck@...el.com, sathyanarayanan.kuppuswamy@...ux.intel.com,
 alpergun@...gle.com, jarkko@...nel.org, ashish.kalra@....com,
 nikunj.dadhania@....com, pankaj.gupta@....com, liam.merwick@...cle.com
Subject: Re: [PATCH v12 18/29] KVM: SEV: Use a VMSA physical address variable
 for populating VMCB

On 3/29/24 23:58, Michael Roth wrote:
> From: Tom Lendacky<thomas.lendacky@....com>
> 
> In preparation to support SEV-SNP AP Creation, use a variable that holds
> the VMSA physical address rather than converting the virtual address.
> This will allow SEV-SNP AP Creation to set the new physical address that
> will be used should the vCPU reset path be taken.
> 
> Signed-off-by: Tom Lendacky<thomas.lendacky@....com>
> Signed-off-by: Ashish Kalra<ashish.kalra@....com>
> Signed-off-by: Michael Roth<michael.roth@....com>
> ---

I'll get back to this one after Easter, but it looks like Sean had some 
objections at https://lore.kernel.org/lkml/ZeCqnq7dLcJI41O9@google.com/.

Paolo