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Re: [Qemu-devel] q35 and ahci


From: Jason Baron
Subject: Re: [Qemu-devel] q35 and ahci
Date: Thu, 5 Jul 2012 10:06:49 -0400
User-agent: Mutt/1.5.20 (2009-12-10)

On Wed, Jul 04, 2012 at 10:33:18AM +0200, Alexander Graf wrote:
> On 04.07.2012, at 03:29, Jason Baron wrote:
> 
> > On Tue, Jul 03, 2012 at 10:54:37PM +0200, Alexander Graf wrote:
> >> On 03.07.2012, at 22:37, Jason Baron wrote:
> >> 
> >>> On Tue, Jul 03, 2012 at 08:52:50PM +0200, Alexander Graf wrote:
> >>>> On 03.07.2012, at 20:46, Jason Baron wrote:
> >>>> 
> >>>>> On Tue, Jul 03, 2012 at 08:41:29PM +0200, Alexander Graf wrote:
> >>>>>> On 03.07.2012, at 20:38, Jason Baron wrote:
> >>>>>> 
> >>>>>>> On Tue, Jul 03, 2012 at 08:25:52PM +0200, Alexander Graf wrote:
> >>>>>>>> On 03.07.2012, at 18:16, Jason Baron wrote:
> >>>>>>>> 
> >>>>>>>>> Hi,
> >>>>>>>>> 
> >>>>>>>>> Update on q35 testing with various os's.
> >>>>>>>>> 
> >>>>>>>>> Linux
> >>>>>>>>> -----
> >>>>>>>>> -RHEL6.3 installs + runs 
> >>>>>>>>> -Fedora 16 install + runs
> >>>>>>>>> -Fedora 17 - squashfs errors 
> >>>>>>>>> running on already installed f17 seems ok.
> >>>>>>>>> 
> >>>>>>>>> Windows
> >>>>>>>>> -------
> >>>>>>>>> -W7 - install error:
> >>>>>>>>> 
> >>>>>>>>> "A required cd/dvd device driver is missing. If you have a
> >>>>>>>>> driver floppy disk, CD, DVD, or USB flash drive, please insert it 
> >>>>>>>>> now.
> >>>>>>>>> "
> >>>>>>>>> 
> >>>>>>>>> Related to the new ahci controller, since if I go back to an
> >>>>>>>>> ide conroller it keeps going (albeit the install is *very* slow).
> >>>>>>>>> 
> >>>>>>>>> So I'm wondering if we need an ide compatibility mode? Or perhaps, 
> >>>>>>>>> there
> >>>>>>>>> are other ideas.
> >>>>>>>> 
> >>>>>>>> Does it work with AHCI and -M pc? It should. Last time I tried it 
> >>>>>>>> did at least :).
> >>>>>>>> 
> >>>>>>>> 
> >>>>>>>> Alex
> >>>>>>>> 
> >>>>>>>> 
> >>>>>>> 
> >>>>>>> Yes, adding the ahci controller to -M pc, I see a disk drive and the
> >>>>>>> controller show up in the device manager. I read in some of the ahci
> >>>>>>> commit messages that the cdrom device didn't show up. Did cdrom ever
> >>>>>>> work with ahci?
> >>>>>> 
> >>>>>> It did on Linux at least, yes. Does it work on Linux for you?
> >>>>>> 
> >>>>> 
> >>>>> I meant did a cdrom on the ahci controller configure on windows?
> >>>>> 
> >>>>> Yes, Linux seems to be happy with the drive and cdrom on the ahci. See
> >>>>> my above test results. (ich9-ahci is the default controller for q35).
> >>>> 
> >>>> Ah, good. I don't remember tbh. But I suppose since it doesn't work for 
> >>>> you, it's broken :). Do you have time to look into it?
> >>>> 
> >>> 
> >>> I have time to look at it (I'm trying to get q35 working on as many os's
> >>> as possible), but I'm far from an expert on ahci. So if you had some
> >>> time to look at it, that would be great. My q35 trees are at:
> >> 
> >> Not sure how quickly I can get around to it. I still have quite a bunch of 
> >> other stuff on my plate atm.
> >> 
> >>> git://github.com/jibaron/q35-qemu.git
> >>> git://github.com/jibaron/q35-seabios.git
> >>> 
> >>> With a cmd line such as:
> >>> 
> >>> /usr/local/bin/qemu-system-x86_64  -name "f16" -M pc_q35 -m 1G -smp 4
> >>> -hda ./f16.img --enable-kvm  -bios <path>/q35-seabios/out/bios.bin
> >>> -acpitable file=<path>/q35-seabios/out/q35-acpi-dsdt.aml  -monitor stdio
> >> 
> >> I suppose you mean something that actually does -cdrom?
> > 
> > oops. yes. here's an example:
> > 
> > /usr/local/bin/qemu-system-x86_64 -boot c -name  "w7" -m 6G -smp 4 -M
> > pc_q35 -cdrom
> > /images/isos/en_windows_7_ultimate_with_sp1_x64_dvd_u_677332.iso
> > -hda /images/w7-q35.img  -vnc :5 --enable-kvm -bios
> > /root/seabios/seabios/out/bios.bin -acpitable
> > file=/root/seabios/seabios/out/q35-acpi-dsdt.aml -monitor stdio
> > 
> >> 
> >>> The error I run into is:
> >>> 
> >>> "A required cd/dvd device driver is missing. If you have a
> >>> driver floppy disk, CD, DVD, or USB flash drive, please insert it now.
> >>> "
> >> 
> >> Well, that only tells us that it couldn't find its own CD drive. The 
> >> question is why. Some ATA logs would be nice here :).
> >> 
> > 
> > I've posted a log at: http://people.redhat.com/~jbaron/qemu/log
> > 
> > Created with the debug patch below.
> 
> This log is using ATA for the disk as well, heavily cluttering the log. 
> Please use virtio for the disk so we can isolate the commands that actually 
> go to the cdrom.
> 
> 
> Alex
> 
> 

Log is still pretty large. But hopefully this one is more useful:

http://people.redhat.com/~jbaron//qemu/windows-ahci-boot-virtio-disk

Please let me know if anything else would be helpful.

Thanks,

-Jason



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