Re: [Xen-devel] Vt-d not working with 3.4.1

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Wed, Aug 19, 2009 at 05:45:53PM +0800, Teo En Ming (Zhang Enming) wrote:
> Dear Pasi,
> 
> I did a "readelf bzImage" command and it is not an ELF image. I even tried
> to do a readelf command on the default kernel (without Xen) that ships with
> Fedora 11 and it says not an ELF image too.
> 
> Strange. Default installing Fedora 11 kernel not ELF image?
> 

Maybe you need to do "bzcat kernel > kernel.elf && readelf kernel.elf".

> When configuring the pv-ops dom 0 kernel, I always select bzip2 compression.
> 
> I also carried out the readelf command on vmlinux and vmlinux.bin in the
> arch/x86/boot/compressed directory after compiling the kernel. Both files
> reported as ELF 64-bit executable but using vmlinux will NOT boot. Only
> using vmlinux.bin will boot.
> 

I was talking about the "vmlinux" from the top level directory, not from
arch/x86/boot/compressed.


Here is my grub.conf from my F11 dom0:

title Fedora Xen pv_ops dom0-test (2.6.31-rc6)
        root (hd0,0)
        kernel /xen.gz dom0_mem=1024M loglvl=all guest_loglvl=all
        module /vmlinuz-2.6.31-rc6 ro root=/dev/mapper/vg_dom0test-lv01
        module /initrd-2.6.31-rc6.img


Where "vmlinuz-2.6.31-rc6" is arch/x86/boot/bzImage.

-- Pasi

> 
> Regards,
>  
> Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics Engineering)
> BEng(Hons)(Mechanical Engineering) 
> Technical Support Engineer 
> Information Technology Department
> Asiasoft Online Pte Ltd
> Tampines Central 1 #04-01 Tampines Plaza 
> Singapore 529541
> Republic of Singapore
> Mobile: +65-9648-9798
> MSN: teoenming@xxxxxxxxxxx
> 
> -----Original Message-----
> From: Pasi Kärkkäinen [mailto:pasik@xxxxxx] 
> Sent: Wednesday, August 19, 2009 5:27 PM
> To: Teo En Ming (Zhang Enming)
> Cc: weidong.han@xxxxxxxxx; 'Bonenkamp, Ralf'; xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-devel] Vt-d not working with 3.4.1
> 
> On Wed, Aug 19, 2009 at 05:10:47PM +0800, Teo En Ming (Zhang Enming) wrote:
> > Hi,
> > 
> > My hardware configuration is as follows:
> > 
> > Intel Desktop Board DQ45CB
> > BIOS Flashed from version 0063 to 0093
> > Intel Pentium Dual Core E6300
> > PCI Express x16 Graphics card NVIDIA chipset
> > 8 GB DDR2-800
> > 
> > My software configuration is as follows:
> > 
> > Fedora 11 64-bit host operating system
> > Jeremy's pv-ops dom0 kernel 2.6.30 rc3 and 2.6.31 rc6
> > Xen 3.4.1 testing
> > 
> > When I tried to download and compile Jeremy's pv-ops dom0 kernel, bzImage
> > kernel image is compiled successfully for both 2.6.30 rc3 and 2.6.31 rc6.
> > 
> > However, when I tried to boot using bzImage kernel image, it complains of
> a
> > kernel panic on CPU0.
> > 
> > (XEN) *** LOADING DOMAIN 0 ***
> > (XEN) elf_init: not an ELF binary
> > 
> > I googled around and saw a posting saying to use vmlinux kernel image and
> > not the bzImage kernel image.
> > 
> 
> I'm using arch/x86/boot/bzImage from pv_ops dom0 kernel tree as dom0 kernel,
> 
> and it works without problems.
> 
> Are you using LZMA compression for the kernel? Maybe that's the problem..
> 
> > So I tried to use vmlinux in arch/x86/boot/compressed to boot but it did
> not
> > work.
> > 
> 
> Earlier when Xen didn't support bzImage yet, I used "vmlinux" from the top
> directory of kernel tree. It's huge, but you can gzip it to make it a bit
> smaller.
> 
> Xen 3.4.x supports bzImage dom0 kernels.
> 
> > Not disheartened, I proceeded to try vmlinux.bin as my kernel image.
> > 
> > Now I can successfully boot up the Xen Dom 0 pv-ops kernel, I can see
> Domain
> > 0 using "xm list" and I can see the Ethernet bridge created and I can also
> > surf the internet using a text based browser.
> > 
> > However, I cannot start X server. It crashed. The system complains about
> > some libraries.
> > 
> > Any idea what goes wrong?
> > 
> 
> Read "dmesg" and X log.
> 
> -- Pasi
> 
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> 

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