From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wei Wang2 Subject: Re: bug, bad page free with hvm guest after commits about AMD IOMMU Date: Thu, 5 May 2011 17:25:06 +0200 Message-ID: <201105051725.06992.wei.wang2@amd.com> References: <20110505144436.GC24068@whitby.uk.xensource.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20110505144436.GC24068@whitby.uk.xensource.com> Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Tim Deegan Cc: Anthony Perard , Xen Devel List-Id: xen-devel@lists.xenproject.org On Thursday 05 May 2011 16:44:36 Tim Deegan wrote: > CC'ing John and George, who reported similar-sounding failures. > > At 14:56 +0100 on 05 May (1304607375), Anthony Perard wrote: > > On Thu, May 5, 2011 at 14:40, Tim Deegan wrote: > > > At 14:31 +0100 on 05 May (1304605909), Anthony PERARD wrote: > > >> Hi, > > >> > > >> With the last xen-unstable, when I try to run a HVM guest, the vgabi= os > > >> did not display anything on the screen (it is only white), and Xen > > >> print this: > > > > > > Interesting. =C2=A0I get those messages but the BIOS continues OK so I > > > hadn't been in a hurry to investigate. =C2=A0I'll take a look. > > > > Yes, the guest works fine after that, but on linux, there is no vga > > console, but a X server work fine. > > I suspect it's the use of type 0 to mean RAM: it means that an entry of > all zeroes no longer gives type mmio so something's not going to qemu > correctly. > > Does the attached patch fix it for you? I'm still seeing intermittent > failures with it but they may be unrelated. Tim, This patch works well with AMD. Thanks! Wei > Tim.