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[Qemu-devel] Re: link failure with s390
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] Re: link failure with s390 |
Date: |
Mon, 14 Dec 2009 00:27:06 +0200 |
User-agent: |
Mutt/1.5.19 (2009-01-05) |
On Sun, Dec 13, 2009 at 11:19:40PM +0100, Alexander Graf wrote:
>
> On 13.12.2009, at 23:13, Michael S. Tsirkin wrote:
>
> > On Sun, Dec 13, 2009 at 10:44:04PM +0100, Alexander Graf wrote:
> >>
> >> On 13.12.2009, at 21:19, Michael S. Tsirkin wrote:
> >>
> >>> On Sun, Dec 13, 2009 at 09:15:30PM +0100, Alexander Graf wrote:
> >>>>
> >>>> Am 13.12.2009 um 20:58 schrieb "Michael S. Tsirkin" <address@hidden>:
> >>>>
> >>>>> On Sun, Dec 13, 2009 at 08:21:57PM +0100, Alexander Graf wrote:
> >>>>>>
> >>>>>> On 13.12.2009, at 20:08, Michael S. Tsirkin wrote:
> >>>>>>
> >>>>>>> On Sun, Dec 13, 2009 at 06:30:56PM +0100, Alexander Graf wrote:
> >>>>>>>>
> >>>>>>>> On 13.12.2009, at 15:51, Michael S. Tsirkin wrote:
> >>>>>>>>
> >>>>>>>>> s390-virtio-bus.o: In function `virtio_s390_notify':
> >>>>>>>>> /scm/qemu/hw/s390-virtio-bus.c:310: undefined reference to
> >>>>>>>>> `kvm_s390_virtio_irq'
> >>>>>>>>>
> >>>>>>>>
> >>>>>>>> Are you sure you're building with --enable-kvm?
> >>>>>>>
> >>>>>>> No, I did ./configure --taget-list=s390x-softmmu
> >>>>>>>
> >>>>>>>> Currently there's no emulation target for S390.
> >>>>>>>
> >>>>>>> So either configure should fail without --enable-kvm,
> >>>>>>> or better enable kvm by default.
> >>>>>>
> >>>>>> Well, that's why you have to explicitly do --target-list=s390-
> >>>>>> softmmu. I'd love to see S390 bumped to a normal qemu arch with both
> >>>>>> TCG and KVM backends. But for now we don't have that.
> >>>>>>
> >>>>>> But yeah, we should probably add some sort of detection to
> >>>>>> configure, so it fails when you're building S390 on non-S390 and w/o
> >>>>>> KVM :-).
> >>>>>>
> >>>>>>
> >>>>>> Alex
> >>>>>
> >>>>> By the way, where do you get kernel headers for s390
> >>>>> which are required to build with --enable-kvm?
> >>>>> Which distro ships them?
> >>>>
> >>>> Uh, that's just the normal kernel headers, right?
> >>>> SLE11 definitely does ship them.
> >>>
> >>> kvm has architecture specific defines, does it not?
> >>
> >> In files called the same on x86, just with a different asm link.
> >
> > Exactly.
> > ls -l /usr/src/kernels/2.6.30.8-64.fc11.i586/include/asm lrwxrwxrwx 1 root
> > root 7 2009-10-04 17:53
> > /usr/src/kernels/2.6.30.8-64.fc11.i586/include/asm -> asm-x86
> >
> > so it won't find link for s390x.
>
> Yes, because you can only build KVM for S390x on S390x :-).
>
> >
> >>>
> >>>> Worst case you just install the kernel
> >>>> sources.
> >>>>
> >>>> Alex
> >>>>>
> >>>
> >>> kernel sources is the wrong things to use for qemu. qemu should use
> >>> exported sanitized sources.
> >>
> >> Same thing as on all other archs. What's your point here?
> >>
> >> Alex
> >
> > Hmm. I'm just trying to understand how does build find kvm headers for
> > s390 since they are not linked to from asm. Possibly what happens is we
> > just pick
> > a wrong arch and it kind of works most of the time?
> >
> > anyway, with --enable-kvm I still get:
> >
> > s390-virtio-bus.o: In function `virtio_s390_notify':
> > /scm/qemu/hw/s390-virtio-bus.c:310: undefined reference to
> > `kvm_s390_virtio_irq'
> > collect2: ld returned 1 exit status
>
> Are you sure you're building on s390x? What does uname -a say?
>
> Alex
No, I'm not. Ah, I forgot, kvm needs to be built native. My mistake,
sorry. And anyway, it won't be much help without kvm supporting
hardware. Oh well, I will get by with compile test only without linking
it.
--
MST
- [Qemu-devel] link failure with s390, Michael S. Tsirkin, 2009/12/13
- [Qemu-devel] Re: link failure with s390, Alexander Graf, 2009/12/13
- [Qemu-devel] Re: link failure with s390, Michael S. Tsirkin, 2009/12/13
- [Qemu-devel] Re: link failure with s390, Alexander Graf, 2009/12/13
- [Qemu-devel] Re: link failure with s390, Michael S. Tsirkin, 2009/12/13
- [Qemu-devel] Re: link failure with s390, Alexander Graf, 2009/12/13
- [Qemu-devel] Re: link failure with s390, Michael S. Tsirkin, 2009/12/13
- [Qemu-devel] Re: link failure with s390, Alexander Graf, 2009/12/13
- [Qemu-devel] Re: link failure with s390, Michael S. Tsirkin, 2009/12/13
- [Qemu-devel] Re: link failure with s390, Alexander Graf, 2009/12/13
- [Qemu-devel] Re: link failure with s390,
Michael S. Tsirkin <=