From: Paolo Bonzini <pbonzini@redhat.com>
To: Sean Christopherson <seanjc@google.com>
Cc: Maxim Levitsky <mlevitsk@redhat.com>,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
stable@vger.kernel.org
Subject: Re: [PATCH v2] KVM: x86: check PIR even for vCPUs with disabled APICv
Date: Thu, 18 Nov 2021 18:56:34 +0100 [thread overview]
Message-ID: <4316fbc5-b758-a7c6-530d-dc5a97f4e97b@redhat.com> (raw)
In-Reply-To: <YZZ8hAjbIJnkkraD@google.com>
On 11/18/21 17:17, Sean Christopherson wrote:
> On Thu, Nov 18, 2021, Paolo Bonzini wrote:
>> On 11/18/21 10:56, Maxim Levitsky wrote:
>>> vmx_sync_pir_to_irr has 'if (KVM_BUG_ON(!vcpu->arch.apicv_active,
>>> vcpu->kvm))' That has to be removed I think for this to work.
>>
>> Good point.
>
> Hmm, I think I'd prefer to keep it as
>
> if (KVM_BUG_ON(!enable_apicv))
> return -EIO;
>
> since calling it directly or failing to nullify vmx_x86_ops.sync_pir_to_irr when
> APICv is unsupported would lead to all sorts of errors. It's not a strong
> preference though.
>
Sure, why not. There's a few more changes required to handle
KVM_REQ_EVENT when APICv is !active on the CPU, so I'll post it early
next week.
(The MOVE/COPY context stuff also exposed itself as a bit of a
trainwreck and ate half of my day).
Paolo
next prev parent reply other threads:[~2021-11-18 17:56 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-18 7:25 Paolo Bonzini
2021-11-18 9:56 ` Maxim Levitsky
2021-11-18 11:11 ` Paolo Bonzini
2021-11-18 11:17 ` Maxim Levitsky
2021-11-18 16:17 ` Sean Christopherson
2021-11-18 17:56 ` Paolo Bonzini [this message]
2021-11-18 16:18 ` Sean Christopherson
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