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| author | yu liu <yu.liu@freescale.com> | 2011-06-15 01:34:25 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-07-12 12:16:30 +0200 |
| commit | 685659ee70db0bac47ffd619c726cf600e504fd7 (patch) | |
| tree | 80d17e740132295a77732b539ce620203c3646ba /arch/powerpc/kernel/traps.c | |
| parent | KVM: PPC: Resolve real-mode handlers through function exports (diff) | |
| download | linux-685659ee70db0bac47ffd619c726cf600e504fd7.tar.xz linux-685659ee70db0bac47ffd619c726cf600e504fd7.zip | |
powerpc/e500: Save SPEFCSR in flush_spe_to_thread()
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@freescale.com>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/kernel/traps.c')
| -rw-r--r-- | arch/powerpc/kernel/traps.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index 1a0141426cda..f19d9777d3c1 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -1387,10 +1387,7 @@ void SPEFloatingPointException(struct pt_regs *regs) int code = 0; int err; - preempt_disable(); - if (regs->msr & MSR_SPE) - giveup_spe(current); - preempt_enable(); + flush_spe_to_thread(current); spefscr = current->thread.spefscr; fpexc_mode = current->thread.fpexc_mode; |