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Re: [Qemu-ppc] [RFC PATCH 12/17] PowerPC: booke64: Add DO_KVM kernel hoo
From: |
Benjamin Herrenschmidt |
Subject: |
Re: [Qemu-ppc] [RFC PATCH 12/17] PowerPC: booke64: Add DO_KVM kernel hooks |
Date: |
Thu, 12 Jul 2012 08:43:04 +1000 |
On Thu, 2012-07-12 at 00:35 +0200, Alexander Graf wrote:
> > On Thu, 2012-07-12 at 00:25 +0200, Alexander Graf wrote:
> >> Or just free up another register early on, like here.
> >
> > If you're going to do that, you want to measure the impact on null
> > syscall performance though.
>
> That should hold true for any change in that code, no?
Yes, but adding a gpr save is more invasive (you have to also load it
back later on & put it on the stack).
Cheers,
Ben.
- Re: [Qemu-ppc] [RFC PATCH 12/17] PowerPC: booke64: Add DO_KVM kernel hooks, (continued)
Re: [Qemu-ppc] [RFC PATCH 12/17] PowerPC: booke64: Add DO_KVM kernel hooks, Benjamin Herrenschmidt, 2012/07/04
- Re: [Qemu-ppc] [RFC PATCH 12/17] PowerPC: booke64: Add DO_KVM kernel hooks, Caraman Mihai Claudiu-B02008, 2012/07/06
- Re: [Qemu-ppc] [RFC PATCH 12/17] PowerPC: booke64: Add DO_KVM kernel hooks, Alexander Graf, 2012/07/06
- Re: [Qemu-ppc] [RFC PATCH 12/17] PowerPC: booke64: Add DO_KVM kernel hooks, Caraman Mihai Claudiu-B02008, 2012/07/07
- Re: [Qemu-ppc] [RFC PATCH 12/17] PowerPC: booke64: Add DO_KVM kernel hooks, Alexander Graf, 2012/07/11
- Re: [Qemu-ppc] [RFC PATCH 12/17] PowerPC: booke64: Add DO_KVM kernel hooks, Benjamin Herrenschmidt, 2012/07/11
- Re: [Qemu-ppc] [RFC PATCH 12/17] PowerPC: booke64: Add DO_KVM kernel hooks, Alexander Graf, 2012/07/11
- Re: [Qemu-ppc] [RFC PATCH 12/17] PowerPC: booke64: Add DO_KVM kernel hooks,
Benjamin Herrenschmidt <=
- Re: [Qemu-ppc] [RFC PATCH 12/17] PowerPC: booke64: Add DO_KVM kernel hooks, Alexander Graf, 2012/07/11