Re: winXP "Standard PC" HAL and qemu-kvm >= 0.15

[Jan Kiszka <jan.kiszka@web.de>]

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On 2011-12-06 20:38, Michael Tokarev wrote:
> [Removed some people from the Cc list]
> 
> On 06.12.2011 22:45, Michael Tokarev wrote:
> []
>>> git://git.kiszka.org/qemu-kvm.git queues/kvm-irqchip
>>
>> This tree does not boot for me at all (on regular x86-64 setup) -
>> it stays in bios after "Booting from hard disk" with 100% CPU
>> usage.
> 
> This happens since
> 
> commit 1ae1cec76a205446e6b4e5600ad0af450f7c0b5e
> Author: Jan Kiszka <jan.kiszka@siemens.com>
> Date:   Sun Oct 16 19:38:22 2011 +0200
> 
>     ioapic: Introduce backend/frontend infrastructure for KVM reuse
> 
> Also, with this
> 
> commit 063e1bea9b0c79bda48c9e82552c5c6c83d03cf7
> Author: Jan Kiszka <jan.kiszka@siemens.com>
> Date:   Sat Oct 15 11:49:47 2011 +0200
> 
>     kvm: Introduce core services for in-kernel irqchip support
> 
> the whole thing segfaults at startup:
> 
> (gdb) ru -monitor stdio -m 1G -netdev type=tap,ifname=tap-kvm1,script=no,downscript=no,id=n -device rtl8139,netdev=n,mac=52:54:00:12:34:57 -drive file=/stage/win/dist/t.raw,if=ide,cache=unsafe -vga std -usbdevice tablet -enable-kvm
> ...
> Program received signal SIGSEGV, Segmentation fault.
> 0x00007ffff5670c7a in ?? () from /lib/x86_64-linux-gnu/libc.so.6
> (gdb) bt
> #0  0x00007ffff5670c7a in ?? () from /lib/x86_64-linux-gnu/libc.so.6
> #1  0x00005555557abb3d in ioapic_init (dev=0x555556849f60)
>     at /build/kvm/git/hw/ioapic_common.c:92
> #2  0x00005555556a0a85 in sysbus_device_init (dev=0x555556849f60,
>     base=0x555555be7200) at /build/kvm/git/hw/sysbus.c:133
> #3  0x00005555556df670 in qdev_init (dev=0x555556849f60)
>     at /build/kvm/git/hw/qdev.c:293
> #4  0x00005555556dfa8a in qdev_init_nofail (dev=0x555556849f60)
>     at /build/kvm/git/hw/qdev.c:387
> #5  0x00005555557f9bc2 in ioapic_init (gsi_state=0x55555683ff70)
>     at /build/kvm/git/hw/pc_piix.c:63
> #6  0x00005555557f9f76 in pc_init1 (system_memory=0x55555641a1b0,
>     system_io=0x55555641a2b0, ram_size=1073741824,
>     boot_device=0x7fffffffea30 "cad", kernel_filename=0x0,
>     kernel_cmdline=0x55555586fbff "", initrd_filename=0x0, cpu_model=0x0,
>     pci_enabled=1, kvmclock_enabled=1) at /build/kvm/git/hw/pc_piix.c:166
> #7  0x00005555557fa425 in pc_init_pci (ram_size=1073741824,
>     boot_device=0x7fffffffea30 "cad", kernel_filename=0x0,
>     kernel_cmdline=0x55555586fbff "", initrd_filename=0x0, cpu_model=0x0)
>     at /build/kvm/git/hw/pc_piix.c:245
> #8  0x00005555556b99ca in main (argc=16, argv=0x7fffffffeb58,
>     envp=0x7fffffffebe0) at /build/kvm/git/vl.c:3351
> (gdb) frame 1
> #1  0x00005555557abb3d in ioapic_init (dev=0x555556849f60)
>     at /build/kvm/git/hw/ioapic_common.c:92
> 92	        if (strcmp(b->name, s->backend_name) == 0) {
> (gdb) p b->name
> $1 = 0x55555588588d "QEMU"
> (gdb) p s->backend_name
> $2 = 0x0
> (gdb) _
> 

How embarrassing. Messed something up, maybe during rebase, and forgot
to retest non-irqchip mode. Will fix and repost.

But -machine pc,accel=kvm,kernel_irqchip=on (instead of -enable-kvm)
should work.

Jan


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