Re: [PATCH 1/4] x86/fpu: Clear XSTATE_BV[i] in save state whenever XFD[i]=1

[Jim Mattson]

On Thu, Jan 1, 2026 at 1:13 AM Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote:
>
> From: Sean Christopherson <seanjc@xxxxxxxxxx>
> ...
> +       /*
> +        * KVM's guest ABI is that setting XFD[i]=1 *can* immediately revert
> +        * the save state to initialized.

This comment suggests that an entry should be added to
Documentation/virt/kvm/x86/errata.rst.