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

[Dave Hansen]

On 2/5/26 07:50, Sean Christopherson wrote:
>>>> That sounds like new hardware support, if you really want that, why not
>>>> just use newer kernel versions with this fix in it?  Obviously no one is
>>>> running those kernels on that hardware today, so this isn't a regression 🙂
> I disagree, this absolutely is a regression.  Kernels without commit 14619d912b65
> will boot on this "new" hardware, kernels with the commit will not.

Yeah, it is a regression for sure. It's a weird one, but it is a regression.

We need to either disable FRED on SEV-ES/SNP+FRED systems or fix it. We
obviously want to fix it in mainline. I guess stable could do something
different here and disable FRED instead if it wanted. That would avoid
even a whiff of appearing to add new hardware support.

I'd personally prefer to just keep stable and mainline as close as possible.

P.S. #VC and #VE are a scourge