Re: [Qemu-devel] [PATCH] pc: Clean up PIC-to-APIC IRQ path

[Jan Kiszka]

On 2011-08-29 23:13, Avi Kivity wrote:
> On 08/30/2011 12:06 AM, Jan Kiszka wrote:
>> >
>> >  Does this need to be save/restored for migration?
>>
>> Nope, but we need some other measure. I thought to remember the pic was
>> refreshing this after load, but I do not find any traces of this now. We
>> likely need a post_load handler in the i8259 that re-asserts the IRQ as
>> required.
>>
> 
> We need some kind of two phase restore. In the first phase all state is
> restored; since some of that state drivers outputs that are input to
> other devices, they may experience an edge, and we need to supress
> that.  In the second phase edge detection is unsupressed and the device
> goes live.

Sounds like it's time to open cpu_synchronize_all_post_init for non-kvm
folks.

Jan

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