Re: [Qemu-devel] git bisect results: ec757c67c40a56492001487e69272f62144fd124 breaks windows boot in qemu-kvm

[Erik Rull]

On February 1, 2012 at 11:05 PM Erik Rull <address@hidden> wrote:

> Jan Kiszka wrote:
> > On 2012-02-01 13:52, Erik Rull wrote:
> >>   Hi all,
> >>
> >> first of all I'm a bit confused:
> >>
> >> What is the difference between qemu with command line option
--enable-kvm
> >> and qemu-kvm?
> >> It seems to be a difference in code so far, from the performance point
of
> >> view it seems to be the same...
> >>
> >> Now my issue that lead me to a git bisect on qemu-kvm:
> >> The following commit / merge breaks my windows guest boot sequence and
> >> causes resets infinitely:
> >
> > Cannot confirm yet, but I have no ACPI-free Windows installation at
> > hand. Where does it reset, after the BIOS?
> >
> >> ec757c67c40a56492001487e69272f62144fd124 Merge branch 'upstream-merge'
into
> >> next
> >> Thu, 5 Jan 2012 11:00:07 +0000 (13:00 +0200)    Avi
Kivity<address@hidden>
> >>
> >>
> >> Interesting: qemu with --enable-kvm master and the same command line
> >> options as qemu-kvm runs perfect.
> >> My command line options are:
> >> qemu-system-x86_64 -serial /dev/ttyS2 -readconfig
/etc/ich9-ehci-uhci.cfg
> >> -device usb-host,bus=ehci.0 -device usb-tablet -drive
> >> file=/dev/sda2,cache=off -m 1024 -net nic,macaddr=$MACADDR -net
> >> tap,script=/etc/qemu-ifup -no-acpi -monitor stdio -L
/usr/X11R6/share/qemu
> >> -boot c -localtime
> >
> > Is the BIOS at /usr/X11R6/share/qemu in sync with the qemu version you
> > try? Does leaving out options change the picture?
> >
> > Jan
> >
>
> It happens directly after the windows boot progress bar is completed (I
> boot without logo)
>
> With the -no-kvm-irqchip it seems to be fine...
>
> Best regards,
>
> Erik


Hi Jan,

I tested with an ACPI-enabled windows.
Results:
-no-acpi: Continuous reboots like the no-acpi-windows-version
without -no-acpi: boots!

So I tested the no-acpi-windows-version without -no-acpi option - still
rebooting
And without -no-acpi and -no-kvm-irqchip => works again

Best regards,

Erik