[Qemu-devel] Re: [5026] i386: fix isapc machine

[Jan Kiszka]

Aurelien Jarno wrote:
> Revision: 5026
>           http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=5026
> Author:   aurel32
> Date:     2008-08-19 12:55:20 +0000 (Tue, 19 Aug 2008)
> 
> Log Message:
> -----------
> i386: fix isapc machine
> 
> - cirrus vga: enable graphic console
> - pc: don't use apic for interrupts on ISA machine
> 

...

> Modified: trunk/hw/pc.c
> ===================================================================
> --- trunk/hw/pc.c     2008-08-18 18:00:31 UTC (rev 5025)
> +++ trunk/hw/pc.c     2008-08-19 12:55:20 UTC (rev 5026)
> @@ -121,10 +121,14 @@
>      if (!level)
>          return;
>  
> -    while (env) {
> -        if (apic_accept_pic_intr(env))
> -            apic_local_deliver(env, APIC_LINT0);
> -        env = env->next_cpu;
> +    if (env->apic_state) {
> +        while (env) {
> +            if (apic_accept_pic_intr(env))
> +                apic_local_deliver(env, APIC_LINT0);
> +            env = env->next_cpu;
> +        }
> +    } else {
> +        cpu_interrupt(env, CPU_INTERRUPT_HARD);
>      }
>  }

Considering our recent experience with the APIC path, and also when
looking at old qemu versions, just asserting CPU_INTERRUPT_HARD won't be
enough. We also need cpu_reset_interrupt in the (!level) case. Will post
a patch, along with a rebased version for the APIC fix.

Jan

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