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From: Jim Mattson <jmattson@google.com>
To: Wanpeng Li <kernellwp@gmail.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	kvm <kvm@vger.kernel.org>, "Paolo Bonzini" <pbonzini@redhat.com>,
	"Wanpeng Li" <wanpeng.li@hotmail.com>,
	"Dan Cross" <dcross@google.com>, "Marc Orr" <marcorr@google.com>
Subject: Re: [PATCH v2] KVM: nVMX: Fix attempting to emulate "Acknowledge interrupt on exit" when there is no interrupt which L1 requires to inject to L2
Date: Fri, 18 Oct 2019 14:12:15 -0700	[thread overview]
Message-ID: <CALMp9eTrhnWJpROGiCuR4TDHzW+CqRpBm4YV5hXQEdAbPN-fzw@mail.gmail.com> (raw)
In-Reply-To: <CANRm+Cw9+zBrk24MZo5YSw4j2KxyRsuk+dh8QNT9q0orVo7egA@mail.gmail.com>

On Thu, Aug 3, 2017 at 6:23 PM Wanpeng Li <kernellwp@gmail.com> wrote:

> Thanks Radim. :) In addition, I will think more about it and figure
> out a finial solution.

Have you had any thoughts on a final solution? We're seeing incorrect
behavior with an L1 hypervisor running under qemu with "-machine
q35,kernel-irqchip=split", and I believe this may be the cause.

In particular, VMCS12 has ACK_INTERRUPT_ON_EXIT set, but L1 is seeing
an L2 exit for "external interrupt" with the VMCS12 VM-exit
interruption information cleared to 0.

      reply	other threads:[~2019-10-18 21:12 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-08-01  2:25 Wanpeng Li
2017-08-01 19:59 ` Radim Krčmář
2017-08-01 22:42   ` Wanpeng Li
2017-08-02  8:05     ` Wanpeng Li
2017-08-02  8:13       ` Paolo Bonzini
2017-08-03 13:46 ` Radim Krčmář
2017-08-04  1:23   ` Wanpeng Li
2019-10-18 21:12     ` Jim Mattson [this message]

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