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

[Peter Maydell]

On 30 August 2011 20:28, Jan Kiszka <address@hidden> wrote:
> Yes, that's the current state. Once we have bidirectional IRQ links in
> place (pushing downward, querying upward - required to skip IRQ routers
> for fast, lockless deliveries), that should change again.

Can you elaborate a bit more on this? I don't think anybody has
proposed links with their own internal state before in the qdev/qom
discussions...

Also a good solid use case for a bidirectional link is worth
discussing because it influences whether we want to make all
links bidi-by-default or try to do it as a special case.

(OTOH your argument does hold for why reset should be two-phase.)

thanks
-- PMM