linux-kernel - Re: [PATCH 0/6] KVM: nVMX: Fix IPIv vs. nested posted interrupts

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Message-ID: <Zp5Wq1h40JMSYL5a@chao-email>
Date: Mon, 22 Jul 2024 20:55:07 +0800
From: Chao Gao <chao.gao@...el.com>
To: Sean Christopherson <seanjc@...gle.com>
CC: Paolo Bonzini <pbonzini@...hat.com>, <kvm@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, Zeng Guang <guang.zeng@...el.com>
Subject: Re: [PATCH 0/6] KVM: nVMX: Fix IPIv vs. nested posted interrupts

On Fri, Jul 19, 2024 at 05:01:32PM -0700, Sean Christopherson wrote:
>Fix a bug where KVM injects L2's nested posted interrupt into L1 as a
>nested VM-Exit instead of triggering PI processing.  The actual bug is
>technically a generic nested posted interrupts problem, but due to the
>way that KVM handles interrupt delivery, I'm 99.9% certain the issue is
>limited to IPI virtualization being enabled.

Theoretically VT-d posted interrupt can also trigger this issue.

The fix looks good to me. For the whole series:

Reviewed-by: Chao Gao <chao.gao@...el.com>