Re: [Qemu-devel] Question about xen disk unplug support for ahci missed in qemu

[Fabio Fantoni]

Il 15/10/2015 20:02, Anthony PERARD ha scritto:
> On Thu, Oct 15, 2015 at 06:27:17PM +0200, Fabio Fantoni wrote:
> > Il 14/10/2015 13:06, Stefano Stabellini ha scritto:
> > > I would suggest Fabio to avoid AHCI disks altogether and just use OVMF
> > > with PV disks only and Anthony's patch to libxl to avoid creating any
> > > IDE disks: http://marc.info/?l=xen-devel&m=144482080812353.
> > >
> > > Would that work for you?
> > Thanks for the advice, I tried it:
> > https://github.com/Fantu/Xen/commits/rebase/m2r-testing-4.6
> >
> > I installed W10 pro 64 bit with ide disk, installed the win pv drivers and
> > after changed to xvdX instead hdX, is the only change needed, right?
> > Initial boot is ok (ovmf part about pv disks seems ok) but windows boot
> > fails with problem with pv drivers.
> > In attachment full qemu log with xen_platform trace and domU's xl cfg.
> >
> > Someone have windows domUs with ovmf and pv disks only working? If yes can
> > tell me the difference to understand what can be the problem please?
> When I worked on the PV disk implementation in OVMF, I was able to boot
> a Windows 8 with pv disk only.
>
> I don't have access to the guest configuration I was using, but I think one
> difference would be the viridian setting, I'm pretty sure I did not set it.
I tried with viridian disabled but did the same thing, looking cdrom as 
latest thing before xenbug trace in qemu log I tried also to remove it 
but also in this case don't boot correctly, full qemu log in attachment.
I don't know if is a ovmf thing to improve (like what seems in Laszlo 
and Kevin mails) or xen winpv drivers unexpected case, have you tried 
also with latest winpv builds? (for exclude regression)

Thanks for any reply and sorry for my bad english.

qemu-dm-W10UEFI.log
Description: Text document