[PATCH] powerpc/mpic: Remove WHOAMI readback after EOI
scottwood at freescale.com
Thu May 14 02:33:57 AEST 2015
On Wed, 2015-05-13 at 15:23 +0300, Purcareata Bogdan wrote:
> On 24.03.2015 12:43, Bogdan Purcareata wrote:
> > After previous discussions regarding the subject , there's no clear
> > explanation or reason why the call was needed in the first place. The sensible
> > argument is some sort of synchronization between the CPU and the MPIC, which
> > hasn't been pointed out precisely and is no longer required (at least on BookE
> > platforms).
> > The benefit of this change is saving a MMIO trap per interrupt when running in a
> > KVM guest.
> >  https://patchwork.ozlabs.org/patch/429098/
> >  https://patchwork.ozlabs.org/patch/433557/
> > Signed-off-by: Bogdan Purcareata <bogdan.purcareata at freescale.com>
> > ---
> > arch/powerpc/sysdev/mpic.c | 1 -
> > 1 file changed, 1 deletion(-)
This is commit 56302c53d3dc477b8360954fc92c1dfc4fc0ec54 in Linus's tree.
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