DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 596FA4A71A
Date: Thu, 20 Jul 2017 09:43:16 +0200
From: Radim =?utf-8?B?S3LEjW3DocWZ?= <rkrcmar@redhat.com>
To: Brijesh Singh <brijesh.singh@amd.com>
Cc: pbonzini@redhat.com, joro@8bytes.org, kvm@vger.kernel.org,
        linux-kernel@vger.kernel.org, tglx@linutronix.de, mingo@redhat.com,
        hpa@zytor.com, x86@kernel.org, Thomas.Lendacky@amd.com
Subject: Re: [PATCH v2] KVM: x86: Avoid guest page table walk when
 gpa_available is set
Message-ID: <20170720074316.GA30718@potion>
References: <1495206749-25393-1-git-send-email-brijesh.singh@amd.com>
 <dc74033c-4b90-c386-d23b-086610ae8af0@amd.com>
 <20170719111939.GA16149@potion>
 <3d6d983e-b8e2-ac6d-409e-38e96f2da940@amd.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
In-Reply-To: <3d6d983e-b8e2-ac6d-409e-38e96f2da940@amd.com>
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 978
Lines: 29

2017-07-19 08:35-0500, Brijesh Singh:
> On 07/19/2017 06:19 AM, Radim Krčmář wrote:
> > 2017-07-17 16:32-0500, Brijesh Singh:
> > > Hi Paolo and Radim
> > > 
> > > Any comments on this patch, I could not find it in 4.13-2 branch.
> > > 
> > > Please let me know if you want to fix something, or want me to
> > > refresh and resend the patch.
> > 
> > Sorry, I tried it during the merge window, but it didn't pass tests on
> > VMX and I got distracted by other bugs before looking into the cause.
> > 
> > Can you reproduce the fail?
> > 
> 
> No worries, thanks.
> 
> I can try to reproduce it, are you running kvm-unittest or something different?

I noticed that a linux guest hung in early boot, but at least (io)apic
kvm-unit-tests failed as well, IIRC.

> IIRC, VMX does not set the gpa_available flag hence I am wondering what did I miss
> in the patch to trigger the failure. I will debug it and let you know.

It does now, in ept_violation and ept_misconfig,

thanks.