linux-kernel - Re: [PATCH] KVM: VMX: Do not trap VMFUNC instructions for L1 guests.

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Message-ID: <c8f036f4-6ab1-efbe-dd60-b934c21cb21d@redhat.com>
Date:   Mon, 7 Nov 2022 18:20:23 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Yu Zhang <yu.c.zhang@...ux.intel.com>, seanjc@...gle.com,
        kvm@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH] KVM: VMX: Do not trap VMFUNC instructions for L1 guests.

On 11/7/22 09:27, Yu Zhang wrote:
> VMFUNC is not supported for L1 guests, and executing VMFUNC in
> L1 shall generate a #UD directly. Just disable it in secondary
> proc-based execution control for L1, instead of intercepting it
> and inject the #UD again.
> 
> Signed-off-by: Yu Zhang<yu.c.zhang@...ux.intel.com>

Is this for TDX or similar?  The reason for a patch should be mentioned 
in the commit message.

Paolo