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| author | Anton Blanchard <anton@samba.org> | 2015-10-29 11:44:02 +1100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2015-12-01 13:52:25 +1100 |
| commit | a7d623d4d053ccb0cdfad210bced2ec25ddf69a2 (patch) | |
| tree | b1bcf400b9c53c66d483bb641f98fb6e2f270bf9 /arch/powerpc/kernel/vector.S | |
| parent | 98da581e0846f6d932a4bc46a55458140e20478a (diff) | |
| download | op-kernel-dev-a7d623d4d053ccb0cdfad210bced2ec25ddf69a2.zip op-kernel-dev-a7d623d4d053ccb0cdfad210bced2ec25ddf69a2.tar.gz | |
powerpc: Move part of giveup_vsx into c
Move the MSR modification into c. Removing it from the assembly
function will allow us to avoid costly MSR writes by batching them
up.
Check the FP and VMX bits before calling the relevant giveup_*()
function. This makes giveup_vsx() and flush_vsx_to_thread() perform
more like their sister functions, and allows us to use
flush_vsx_to_thread() in the signal code.
Move the check_if_tm_restore_required() check in.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/vector.S')
| -rw-r--r-- | arch/powerpc/kernel/vector.S | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/arch/powerpc/kernel/vector.S b/arch/powerpc/kernel/vector.S index 6e925b4..98675b0 100644 --- a/arch/powerpc/kernel/vector.S +++ b/arch/powerpc/kernel/vector.S @@ -177,14 +177,8 @@ _GLOBAL(load_up_vsx) * __giveup_vsx(tsk) * Disable VSX for the task given as the argument. * Does NOT save vsx registers. - * Enables the VSX for use in the kernel on return. */ _GLOBAL(__giveup_vsx) - mfmsr r5 - oris r5,r5,MSR_VSX@h - mtmsrd r5 /* enable use of VSX now */ - isync - addi r3,r3,THREAD /* want THREAD of task */ ld r5,PT_REGS(r3) cmpdi 0,r5,0 |
