From: Greg KH <gregkh@linuxfoundation.org>
To: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
joro@8bytes.org, pbonzini@redhat.com, stable@vger.kernel.org
Subject: Re: [PATCH] KVM: SVM: fix NMI window after iret
Date: Fri, 17 Jan 2014 12:18:31 -0800 [thread overview]
Message-ID: <20140117201831.GA20561@kroah.com> (raw)
In-Reply-To: <1389988362-15260-1-git-send-email-rkrcmar@redhat.com>
On Fri, Jan 17, 2014 at 08:52:42PM +0100, Radim Krčmář wrote:
> We should open NMI window right after an iret, but SVM exits before it.
> We wanted to single step using the trap flag and then open it.
> (or we could emulate the iret instead)
> We don't do it since commit 3842d135ff2 (likely), because the iret exit
> handler does not request an event, so NMI window remains closed until
> the next exit.
>
> Fix this by making KVM_REQ_EVENT request in the iret handler.
>
> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
> ---
> (btw. kvm-unit-tests weren't executed on SVM since Nov 2010, at least)
>
> arch/x86/kvm/svm.c | 1 +
> 1 file changed, 1 insertion(+)
<formletter>
This is not the correct way to submit patches for inclusion in the
stable kernel tree. Please read Documentation/stable_kernel_rules.txt
for how to do this properly.
</formletter>
next prev parent reply other threads:[~2014-01-17 20:18 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-17 19:52 [PATCH] KVM: SVM: fix NMI window after iret Radim Krčmář
2014-01-17 20:18 ` Greg KH [this message]
2014-01-17 20:29 ` Radim Krčmář
2014-02-18 9:18 ` Paolo Bonzini
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