[PATCH 01/13] powerpc/e500: Save SPEFCSR in flush_spe_to_thread()

[Kumar Gala]

On May 17, 2011, at 6:35 PM, Scott Wood wrote:

> From: yu liu <yu.liu at freescale.com>
> 
> giveup_spe() saves the SPE state which is protected by MSR[SPE].
> However, modifying SPEFSCR does not trap when MSR[SPE]=0.
> And since SPEFSCR is already saved/restored in _switch(),
> not all the callers want to save SPEFSCR again.
> Thus, saving SPEFSCR should not belong to giveup_spe().
> 
> This patch moves SPEFSCR saving to flush_spe_to_thread(),
> and cleans up the caller that needs to save SPEFSCR accordingly.
> 
> Signed-off-by: Liu Yu <yu.liu at freescale.com>
> Signed-off-by: Scott Wood <scottwood at freescale.com>
> ---
> This is a resending of http://patchwork.ozlabs.org/patch/88677/
> 
> Kumar, please ack to go via kvm.  This is holding up the rest of the SPE
> patches, which in turn are holding up the MMU patches due to both
> touching the MSR update code.
> 
> arch/powerpc/kernel/head_fsl_booke.S |    2 --
> arch/powerpc/kernel/process.c        |    1 +
> arch/powerpc/kernel/traps.c          |    5 +----
> 3 files changed, 2 insertions(+), 6 deletions(-)

Acked-by: Kumar Gala <galak at kernel.crashing.org>

[ Alex, let me know if you want this via my powerpc.git tree or your kvm tree ]

- k