linux-kernel - Re: [Part2 PATCH v5 31/31] KVM: X86: Restart the guest when insn

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Message-ID: <447f9182-c576-17e0-4bf7-9112e5e7c995@redhat.com>
Date:   Wed, 18 Oct 2017 15:00:53 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Brijesh Singh <brijesh.singh@....com>, x86@...nel.org,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Joerg Roedel <joro@...tes.org>, Borislav Petkov <bp@...e.de>,
        Tom Lendacky <thomas.lendacky@....com>
Subject: Re: [Part2 PATCH v5 31/31] KVM: X86: Restart the guest when insn_len
 is zero and SEV is enabled

On 18/10/2017 14:19, Brijesh Singh wrote:
>> Is it needed to test mem_enc_enabled?  Could it instead test for the
>> availability of decode assists?
>
> We can use X86_FEATURE_DECODEASSIST but since mmu.c is common file hence
> I was not sure if its safe for the VMX.  Is it okay to use decode assist
> feature bit in mm.c ?

See the follow up email. :)

Paolo