[Qemu-devel] Re: [PATCH 2/3] kvm-unit-tests: do not set level sensitive irq when initializing the PIC

[Avi Kivity <avi@redhat.com>]

On 02/24/2011 11:48 PM, Anthony Liguori wrote:
> I'm not sure if this was intentional but the QEMU i8259 does not support this
> flag.  I haven't observed any issues with this but I'll happily admit that
> I'm not very aware of what I'm doing here.
>
> Signed-off-by: Anthony Liguori<aliguori@us.ibm.com>
>
>   static u32 xapic_read(unsigned reg)
>   {
>       return *(volatile u32 *)(g_apic + reg);
> @@ -133,7 +129,7 @@ void ioapic_write_redir(unsigned line, ioapic_redir_entry_t e)
>   void enable_apic(void)
>   {
>       printf("enabling apic\n");
> -    xapic_write(0xf0, 0x1ff); /* spurious vector register */
> +    xapic_write(0xf0, 0x1f7); /* spurious vector register */
>   }

Not sure what you're doing here.  You're changing the APIC Spurious 
Vector from 0xff to 0xf7?  This has nothing to do with the i8259 or 
level triggeredness as far as I can tell - it just enables the APIC (bit 
8) and selects a vector for reporting spurious interrupts (0xff happens 
to be the reset value).

-- 
error compiling committee.c: too many arguments to function