Re: [PATCH] kvm tools: Introduce KVM VCPU data structure

[Ingo Molnar <mingo@elte.hu>]

* Pekka Enberg <penberg@kernel.org> wrote:

> In preparation for threaded execution model, this patch introduces a KVM VCPU
> data structure 'struct kvm_cpu'.
> 
> Cc: Asias He <asias.hejun@gmail.com>
> Cc: Cyrill Gorcunov <gorcunov@gmail.com>
> Cc: Ingo Molnar <mingo@elte.hu>
> Signed-off-by: Pekka Enberg <penberg@kernel.org>
> ---
>  tools/kvm/Makefile              |    1 +
>  tools/kvm/cpuid.c               |    6 +-
>  tools/kvm/include/kvm/kvm-cpu.h |   33 ++++
>  tools/kvm/include/kvm/kvm.h     |   16 --
>  tools/kvm/ioport.c              |    2 +
>  tools/kvm/kvm-cpu.c             |  370 +++++++++++++++++++++++++++++++++++++++
>  tools/kvm/kvm-run.c             |   62 ++++---
>  tools/kvm/kvm.c                 |  338 -----------------------------------
>  8 files changed, 445 insertions(+), 383 deletions(-)
>  create mode 100644 tools/kvm/include/kvm/kvm-cpu.h
>  create mode 100644 tools/kvm/kvm-cpu.c

This commit causes a segfault for 'kvm run bzImage':

(gdb) set args run bzImage
(gdb) run
Starting program: /home/mingo/tip/tools/kvm/kvm run bzImage
[Thread debugging using libthread_db enabled]

Program received signal SIGSEGV, Segmentation fault.
0x0000000000405054 in setup_bios (kvm=0x68a010) at bios.c:106
106		memset(p, 0, BDA_END - BDA_START);
Missing separate debuginfos, use: debuginfo-install glibc-2.13-1.x86_64
(gdb) bt
#0  0x0000000000405054 in setup_bios (kvm=0x68a010) at bios.c:106
#1  0x0000000000404ef5 in kvm_cmd_run (argc=<value optimized out>, argv=<value optimized out>, 
    prefix=<value optimized out>) at kvm-run.c:160
#2  0x00000000004038cf in handle_kvm_command (argc=<value optimized out>, argv=<value optimized out>)
    at main.c:16
#3  main (argc=<value optimized out>, argv=<value optimized out>) at main.c:21
(gdb) q
A debugging session is active.

Thanks,

	Ingo