Re: [Xen-devel] Bug: Windows 2003 fails to install on xen-unstable tip

[George Dunlap <george.dunlap@xxxxxxxxxxxxx>]

On 17/04/13 09:27, Jan Beulich wrote:
> > > > On 16.04.13 at 16:35, George Dunlap <george.dunlap@xxxxxxxxxxxxx> wrote:
> > On 16/04/13 15:34, Jan Beulich wrote:
> > > > > > On 16.04.13 at 16:22, George Dunlap <George.Dunlap@xxxxxxxxxxxxx> wrote:
> > > > The other day I just happened to try to install Windows 2003 on
> > > > xen-unstable tip.  After booting the CD and copying the files, the
> > > > whole thing stops at "Setup is starting Windows".
> > > >
> > > > The VM is in the "blocked" state; which means it has called HLT and is
> > > > waiting for interrupts; but no interrupts are delivered, so everything
> > > > just stops.
> > > >
> > > > Windows XP, strangely enough, installs just fine.
> > > >
> > > > I have duplicated this with both qemu-upstream and qemu-traditional;
> > > > and also on both AMD and Intel.
> > > >
> > > > I was wondering:
> > > > 1. if any of you had an idea what changeset might be involved
> > > Any of the RTC emulation changes since 4.2 would be possible
> > > candidates, with mine much more likely than Tim's (since his mainly
> > > fix issues mine introduced).
> > If you've got a git hash tag for your first change, I can do a quick
> > test to see if that's it.
> The first of these commits is 2fe82ac11fd078485388fe7c5e8bc3b6ac9185b0.
Here are the results of my bisect:

620d5dad54008e40798c4a0c4322aef274c36fa3 is the first bad commit
commit 620d5dad54008e40798c4a0c4322aef274c36fa3
Author: Jan Beulich <jbeulich@xxxxxxxx>
Date:   Tue Feb 5 09:44:00 2013 +0100

    x86/HVM: assorted RTC emulation adjustments

    - only call check_update_timer() on REG_B writes when SET changes
    - only call alarm_timer_update() on REG_B writes when relevant bits
      change
    - instead properly handle AF and PF when the guest is not also setting
      AIE/PIE respectively (for UF this was already the case, only a
      comment was slightly inaccurate), including calling the respective
      update functions upon REG_C reads

    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Tested-by: Olaf Hering <olaf@xxxxxxxxx>


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