diff options
| author |   Anton Blanchard <anton@samba.org> | 2015-10-29 11:44:01 +1100 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2015-12-01 13:52:25 +1100 |
| commit | 98da581e0846f6d932a4bc46a55458140e20478a (patch) | |
| tree | 492f2ebbd22ed1000f2d61aa8ad9a7b3ef5f1a1b /arch/powerpc/kernel/fpu.S | |
| parent | powerpc: Remove NULL task struct pointer checks in FP and vector code (diff) | |
| download | linux-dev-98da581e0846f6d932a4bc46a55458140e20478a.tar.xz linux-dev-98da581e0846f6d932a4bc46a55458140e20478a.zip | |
powerpc: Move part of giveup_fpu,altivec,spe into c
Move the MSR modification into new c functions. Removing it from
the low level functions will allow us to avoid costly MSR writes
by batching them up.
Move the check_if_tm_restore_required() check into these new functions.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/fpu.S')
| -rw-r--r-- | arch/powerpc/kernel/fpu.S | 16 |
1 files changed, 2 insertions, 14 deletions
diff --git a/arch/powerpc/kernel/fpu.S b/arch/powerpc/kernel/fpu.S index 71bdce284ad9..431ab571ed1b 100644 --- a/arch/powerpc/kernel/fpu.S +++ b/arch/powerpc/kernel/fpu.S @@ -155,24 +155,12 @@ END_FTR_SECTION_IFSET(CPU_FTR_VSX) blr /* - * giveup_fpu(tsk) + * __giveup_fpu(tsk) * Disable FP for the task given as the argument, * and save the floating-point registers in its thread_struct. * Enables the FPU for use in the kernel on return. */ -_GLOBAL(giveup_fpu) - mfmsr r5 - ori r5,r5,MSR_FP -#ifdef CONFIG_VSX -BEGIN_FTR_SECTION - oris r5,r5,MSR_VSX@h -END_FTR_SECTION_IFSET(CPU_FTR_VSX) -#endif - SYNC_601 - ISYNC_601 - MTMSRD(r5) /* enable use of fpu now */ - SYNC_601 - isync +_GLOBAL(__giveup_fpu) addi r3,r3,THREAD /* want THREAD of task */ PPC_LL r6,THREAD_FPSAVEAREA(r3) PPC_LL r5,PT_REGS(r3) |