linux-kernel - Re: [PATCH] x86/fred: Fix early boot failures on SEV-ES/SNP guests

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Message-Id: <A7C8EB84-E706-443C-8038-64DA7B3CD132@zytor.com>
Date: Thu, 5 Feb 2026 06:34:55 -0800
From: Xin Li <xin@...or.com>
To: "Nikunj A. Dadhania" <nikunj@....com>
Cc: linux-kernel@...r.kernel.org, kvm@...r.kernel.org, bp@...en8.de,
        thomas.lendacky@....com, tglx@...nel.org, mingo@...hat.com,
        dave.hansen@...ux.intel.com, hpa@...or.com, seanjc@...gle.com,
        pbonzini@...hat.com, x86@...nel.org, jon.grimm@....com,
        stable@...r.kernel.org
Subject: Re: [PATCH] x86/fred: Fix early boot failures on SEV-ES/SNP guests



> On Feb 5, 2026, at 12:54 AM, Nikunj A. Dadhania <nikunj@....com> wrote:
> 
>> 
>> Can you please check if it works for you (#VC handler is set in the bringup IDT on AMD)?
> 
> Yes, this works as well. With your change that moves cr4_init(), I no longer
> need my arch/x86/kernel/fred.c modification (moving pr_info() to avoid the #VC).
> SEV-ES / SEV-SNP guests boot successfully with FRED enabled.
> 
> Are you planning to post this for inclusion?

Yes, I will.