Re: [Qemu-ppc] [PATCH] pseries: Support for in-kernel XICS interrupt controller

[David Gibson]

On Wed, Jun 05, 2013 at 05:39:58PM +1000, Alexey Kardashevskiy wrote:
> From: David Gibson <address@hidden>
> 
> Recent (host) kernels support emulating the PAPR defined "XICS" interrupt
> controller system within KVM.  This patch allows qemu to initialize and
> configure the in-kernel XICS, and keep its state in sync with qemu's XICS
> state as necessary.
> 
> This should give considerable performance improvements.  e.g. on a simple
> IPI ping-pong test between hardware threads, using qemu XICS gives us
> around 5,000 irqs/second, whereas the in-kernel XICS gives us around
> 70,000 irqs/s on the same hardware configuration.
> 
> [Mike Qiu <address@hidden>: fixed mistype which caused ics_set_kvm_state() to 
> fail]
> Signed-off-by: David Gibson <address@hidden>
> Signed-off-by: Alexey Kardashevskiy <address@hidden>

I think this one also needs the headers update for qemu first, yes?

-- 
David Gibson                    | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au  | minimalist, thank you.  NOT _the_ _other_
                                | _way_ _around_!
http://www.ozlabs.org/~dgibson

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