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Re: [Qemu-devel] [Bug 1636217] Re: qemu-kvm 2.7 does not boot kvm VMs wi


From: Laszlo Ersek
Subject: Re: [Qemu-devel] [Bug 1636217] Re: qemu-kvm 2.7 does not boot kvm VMs with virtio on top of VMware ESX
Date: Wed, 2 Nov 2016 23:19:35 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0

Adding Gerd, Marcel, and Kevin

On 10/28/16 10:23, Fabian Gr├╝nbichler wrote:
> I traced this back to the switch to enabling virtio-1 mode by default in
> 2.7 in commit 9a4c0e220d8a4f82b5665d0ee95ef94d8e1509d5
> 
> forcing the old behaviour with a 2.6 machine type works.

I think this issue is a duplicate of the following RHBZ:

https://bugzilla.redhat.com/show_bug.cgi?id=1373154

and the *SeaBIOS* commit that makes it all work again is:

commit 0e21548b15e25e010c362ea13d170c61a3fcc899
Author: Gerd Hoffmann <address@hidden>
Date:   Fri Jul 3 11:07:05 2015 +0200

    virtio: pci cfg access

That SeaBIOS commit is part of the SeaBIOS 1.10.0 release.

However, QEMU 2.7 shipped with bundled SeaBIOS 1.9.3 binaries. See QEMU
commits 6e03a28e1cee (part of v2.7.0) and 6e99f5741ff1 (not part of any
tagged release yet).

The fix is probably the following:
- backport SeaBIOS commit 0e21548b15e2 to the stable 1.9 branch, for
  release 1.9.4
- bundle SeaBIOS 1.9.4 binaries with QEMU v2.7.1.

Thanks
Laszlo



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