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/head_32.h | |
| 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/head_32.h')
| -rw-r--r-- | arch/powerpc/kernel/head_32.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/head_32.h b/arch/powerpc/kernel/head_32.h index c39209d56020..a6a5fbbf8504 100644 --- a/arch/powerpc/kernel/head_32.h +++ b/arch/powerpc/kernel/head_32.h @@ -38,11 +38,13 @@ andi. r11, r11, MSR_PR .endm -.macro EXCEPTION_PROLOG_1 +.macro EXCEPTION_PROLOG_1 for_rtas=0 #ifdef CONFIG_VMAP_STACK + .ifeq \for_rtas li r11, MSR_KERNEL & ~(MSR_IR | MSR_RI) /* can take DTLB miss */ mtmsr r11 isync + .endif subi r11, r1, INT_FRAME_SIZE /* use r1 if kernel */ #else tophys(r11,r1) /* use tophys(r1) if kernel */ |