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

[Jan Kiszka <jan.kiszka@siemens.com>]

On 2012-02-02 14:18, Erik Rull wrote:
> 
> On February 1, 2012 at 11:05 PM Erik Rull <erik.rull@rdsoftware.de> 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<avi@redhat.com>
>>>>
>>>>
>>>> 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

Interesting. Need to install such a version, I guess.

What about no-acpi-windows and upstream qemu with kvm and -machine
kernel_irqchip=on?

Jan

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