[Qemu-devel] Re: -kernel-kqemu and a linux guest

[alex <consul@collegeclub.com>]

Brad Campbell wrote:

> Brad Campbell wrote:
>> G'day all,
>> 
>> I've had *great* results running win2k and xp with -kernel-kqemu on an
>> Athlon host under linux 2.6,
>> however my experiments using a linux guest have resulted in complete
>> kernel bombs..
>> Is there anything I should be doing/thinking about when compiling a
>> linux kernel for use as a guest under -kernel-kqemu?
>> 
>> All the ones I have tried thus far (from debian stock kernels through to
>> latest GIT) have just oopsed or segfaulted early in the boot process..
> 
> More info..
> Tried with a brand new shiny 2.6.15.6 kernel..
> screendump and .config at http://fnarfbargle.dyndns.org:81/qemu-oops/
> Also oops2.jpg is the vanilla Debian 2.4 kernel from R3.1
> 
> I've tried 2.6 with the command line:
> qemu -hda vm-1.img -kernel
> /tracks/linux/linux-2.6.15-rc7-git6-qemu/arch/i386/boot/bzImage -m 64
> -kernel-kqemu
> 
> and 2.4 with the command line (as it boots from grub and the kernel is in
> the hard disk image): qemu -hda vm-1.img -m 64 -kernel-kqemu
> 
> Without kqemu and just usermode kqemu it works just dandy.
> 
> My host is a PIII laptop :
> 
> bklaptop:~>cat /proc/cpuinfo
> processor       : 0
> vendor_id       : GenuineIntel
> cpu family      : 6
> model           : 11
> model name      : Intel(R) Pentium(R) III Mobile CPU      1000MHz
> stepping        : 1
> cpu MHz         : 733.358
> cache size      : 512 KB
> fdiv_bug        : no
> hlt_bug         : no
> f00f_bug        : no
> coma_bug        : no
> fpu             : yes
> fpu_exception   : yes
> cpuid level     : 2
> wp              : yes
> flags           : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov
> pat pse36 mmx fxsr sse
> bogomips        : 1468.39
> 
> I'm using the very latest kqemu binary and latest qemu cvs
> 
> Qemu compiled with
> 
> bklaptop:~>gcc --version
> gcc (GCC) 3.3.6 (Debian 1:3.3.6-10)
> Copyright (C) 2003 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions.  There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
> PURPOSE.
> 
> Host and Guest Kernel and kqemu module compiled with
> 
> bklaptop:~>gcc --version
> gcc (GCC) 4.0.3 20060212 (prerelease) (Debian 4.0.2-9)
> Copyright (C) 2006 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions.  There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
> PURPOSE.
> 
> Regards,
> Brad

I have a similar problem on gentoo and debian hosts.
WinXP guest runs fine with -kernel-kqemu, fedora, slax, gentoo livecd guests
fail during the boot process. w98 does not boot either. Without
-kernel-kqemu they all run fine.