From mboxrd@z Thu Jan  1 00:00:00 1970
From: Avi Kivity <avi@redhat.com>
Subject: Re: [PATCH 1/1] Disable GUEST_INTR_STATE_STI flag before injecting
 NMI to guest on VMX
Date: Fri, 27 Aug 2010 12:46:02 +0300
Message-ID: <4C77895A.1000708@redhat.com>
References: <1282853162-16925-1-git-send-email-Jes.Sorensen@redhat.com> <1282853162-16925-2-git-send-email-Jes.Sorensen@redhat.com> <4C7776F9.4070306@siemens.com> <4C7777CA.4010208@redhat.com> <4C7779D2.9090902@siemens.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-15; format=flowed
Content-Transfer-Encoding: 7bit
Cc: Jes Sorensen <Jes.Sorensen@redhat.com>,
	"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
	"gleb@redhat.com" <gleb@redhat.com>
To: Jan Kiszka <jan.kiszka@siemens.com>
Return-path: <kvm-owner@vger.kernel.org>
Received: from mx1.redhat.com ([209.132.183.28]:24184 "EHLO mx1.redhat.com"
	rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
	id S1754696Ab0H0JqH (ORCPT <rfc822;kvm@vger.kernel.org>);
	Fri, 27 Aug 2010 05:46:07 -0400
In-Reply-To: <4C7779D2.9090902@siemens.com>
Sender: kvm-owner@vger.kernel.org
List-ID: <kvm.vger.kernel.org>

  On 08/27/2010 11:39 AM, Jan Kiszka wrote:
>
> AMD does not differentiate between MOV-SS and STI interrupt shadows.
>
> But AMD has its own NMI problems as it does not allow to trap after
> IRET-from-NMI and requires magic dances which are partly broken in KVM.
> I'm leaning towards NMI window emulation via the workaround we use for
> older Intel CPUs without NMI window trapping as well.

Can you elaborate?

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.