From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gerd Hoffmann Subject: Re: Re: [PATCH 2/3] qemu: make cirrus init value pci spec compliant Date: Mon, 12 Oct 2009 17:43:39 +0200 Message-ID: <4AD34EAB.5020501@redhat.com> References: <20091008160623.GA13710@redhat.com> <4ACE0FC6.3050908@redhat.com> <20091008184011.GA6576@shareable.org> <20091009064359.GA9942@redhat.com> <20091009070049.GG19692@redhat.com> <20091009101259.GA12027@redhat.com> <20091009114903.GI19692@redhat.com> <4AD3330B.4090506@redhat.com> <20091012135318.GB3026@redhat.com> <4AD3423B.3020908@redhat.com> <20091012145256.GF3026@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Anthony Liguori , kvm-devel , "Michael S. Tsirkin" , "qemu-devel@nongnu.org" , Avi Kivity To: Gleb Natapov Return-path: In-Reply-To: <20091012145256.GF3026@redhat.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org Errors-To: qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org List-Id: kvm.vger.kernel.org On 10/12/09 16:52, Gleb Natapov wrote: > On Mon, Oct 12, 2009 at 04:50:35PM +0200, Gerd Hoffmann wrote: >> pc.c does some magic here to map the complete bios into high memory >> and the legacy part at 0xe0000, thats why it is loaded in a >> different way. It gets loaded to IO_MEM_ROM memory though, so the >> guest should not be able to corrupt it. >> > But KVM doesn't support it (memory is always writable). And we want to reload > BIOS on reboot for migration purposes. Then it should be switched over to the new rom loader. Also the logic which does *not* reload stuff which goes to IO_MEM_ROM must be turned off for kvm them. cheers, Gerd