diff options
| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2019-12-21 08:32:38 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-01-27 22:37:24 +1100 |
| commit | cd08f109e26231b279bcc0388428afcac6408ec6 (patch) | |
| tree | 327c02894e56cd4dc7de98da709ae778338799bd /arch/powerpc/kernel/fpu.S | |
| parent | 94dd54c51a410b9ffa6356c3ed2ab0317f998ded (diff) | |
powerpc/32s: Enable CONFIG_VMAP_STACK
A few changes to retrieve DAR and DSISR from struct regs
instead of retrieving them directly, as they may have
changed due to a TLB miss.
Also modifies hash_page() and friends to work with virtual
data addresses instead of physical ones. Same on load_up_fpu()
and load_up_altivec().
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
[mpe: Fix tovirt_vmstack call in head_32.S to fix CHRP build]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/2e2509a242fd5f3e23df4a06530c18060c4d321e.1576916812.git.christophe.leroy@c-s.fr
Diffstat (limited to 'arch/powerpc/kernel/fpu.S')
| -rw-r--r-- | arch/powerpc/kernel/fpu.S | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/fpu.S b/arch/powerpc/kernel/fpu.S index 0bb991ddd264..3235a8da6af7 100644 --- a/arch/powerpc/kernel/fpu.S +++ b/arch/powerpc/kernel/fpu.S @@ -94,6 +94,9 @@ END_FTR_SECTION_IFSET(CPU_FTR_VSX) /* enable use of FP after return */ #ifdef CONFIG_PPC32 mfspr r5,SPRN_SPRG_THREAD /* current task's THREAD (phys) */ +#ifdef CONFIG_VMAP_STACK + tovirt(r5, r5) +#endif lwz r4,THREAD_FPEXC_MODE(r5) ori r9,r9,MSR_FP /* enable FP for current */ or r9,r9,r4 |