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Re: [Xen-devel] xl create doesn't like kernel

On Fri, 2011-07-01 at 20:31 +0100, Mike Wright wrote:
> Hi all,
> New to xen-4 and the new tools.
> Running xen-4.1.1 with linux-3.0.0-rc5.
> I have a kernel that boots on bare metal that I thought should boot as a 
> domU.
> This is the command: xl create vm1
> Here are the first few lines of vm1's config file:

Please can you provide the whole file please.

> # Kernel image file.
> kernel = "/boot/vmlinuz-"
> # Optional ramdisk.
> ramdisk = "/boot/initramfs-"

Those paths are valid within the dom0 filesystem?

> Here is the error message:
> Parsing config file vm1
> xc: error: elf_xen_note_check: ERROR: Will only load images built for 
> the generic loader or Linux images: Invalid kernel
> libxl: error: libxl_dom.c:196:libxl__build_pv xc_dom_parse_image failed: 
> Success
> cannot (re-)build domain: -3

Does "xl -vvv create vm1" give any more information?

I downloaded kernel-PAE- from
 ) which contained /boot/vmlinuz- with md5sum 
09b04a528e1cb4939abb05c739b360e6 and it booted OK for me (until it failed due 
to lack of a ramdisk). I tried recent xen-unstable and current tip of 
xen-4.1-testing.hg (23096:45f5bdc1a90a).

I've attached "bzexlode.c" if you compile it then you can use it to
extract the payload from the vmlinuz, which you can then decompress to
get an elf file and run /usr/lib/xen/bin/readnotes on e.g:
        # /root/bzexplode /root/vmlinuz- | file - 
        /dev/stdin: gzip compressed data, from Unix, last modified: Tue Oct 19 
00:50:15 2010, max compression
        # /root/bzexplode /root/vmlinuz- | zcat > 
        # file /tmp/x
        /tmp/x: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), 
statically linked, stripped
        # /usr/lib/xen/bin/readnotes /tmp/x
        GUEST_OS: linux
        GUEST_VERSION: 2.6
        XEN_VERSION: xen-3.0
        VIRT_BASE: 0xc0000000 (4 bytes)
        ENTRY: 0xc0a39000 (4 bytes)
        HYPERCALL_PAGE: 0xc0402000 (4 bytes)
        FEATURES: !writable_page_tables|pae_pgdir_above_4gb
        PAE_MODE: yes
        LOADER: generic
        L1_MFN_VALID: mask=0x1 value=0x1
        SUSPEND_CANCEL:        0x1 (4 bytes)
        HV_START_LOW: 0xf5800000 (4 bytes)
        PADDR_OFFSET:          0 (4 bytes)
Does that match what you see?

> I've seen a lot of the same errors on google but not for xen-4 and xl.
> Any helpers out there?
> TIA,
> Mike Wright
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel

Attachment: bzexplode.c
Description: Text Data

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