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Date:   Mon, 9 May 2022 18:23:17 +0700
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Subject: Re: [PATCH v4 12/15] KVM: SVM: Introduce hybrid-AVIC mode
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To:     linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc:     pbonzini@redhat.com, mlevitsk@redhat.com, seanjc@google.com,
        joro@8bytes.org, jon.grimm@amd.com, wei.huang2@amd.com,
        terry.bowman@amd.com, Maxim Levitsky <mlevisk@redhat.com>
References: <20220508023930.12881-1-suravee.suthikulpanit@amd.com>
 <20220508023930.12881-13-suravee.suthikulpanit@amd.com>
From:   "Suthikulpanit, Suravee" <suravee.suthikulpanit@amd.com>
In-Reply-To: <20220508023930.12881-13-suravee.suthikulpanit@amd.com>
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Maxim / Paolo,

On 5/8/2022 9:39 AM, Suravee Suthikulpanit wrote:
> Currently, AVIC is inhibited when booting a VM w/ x2APIC support.
> because AVIC cannot virtualize x2APIC MSR register accesses.
> However, the AVIC doorbell can be used to accelerate interrupt
> injection into a running vCPU, while all guest accesses to x2APIC MSRs
> will be intercepted and emulated by KVM.
> 
> With hybrid-AVIC support, the APICV_INHIBIT_REASON_X2APIC is
> no longer enforced.
> 
> Suggested-by: Maxim Levitsky<mlevitsk@redhat.com>
> Reviewed-by: Maxim Levitsky<mlevisk@redhat.com>

Sorry for a typo here in the email of the "Reviewed-by" line.

Suravee