diff options
| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2020-11-25 07:10:46 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-12-04 01:01:31 +1100 |
| commit | 035b19a15a98907916a42a6b1d025877c42f10ad (patch) | |
| tree | 0ef1ff338dcaea2bb5ce5e59233f1e7ce17f7204 /arch/powerpc/mm/book3s32/mmu.c | |
| parent | 98f5559a439a68e0773f42352f7c0806cac9e76e (diff) | |
powerpc/32s: Always map kernel text and rodata with BATs
Since commit 2b279c0348af ("powerpc/32s: Allow mapping with BATs with
DEBUG_PAGEALLOC"), there is no real situation where mapping without
BATs is required.
In order to simplify memory handling, always map kernel text
and rodata with BATs even when "nobats" kernel parameter is set.
Also fix the 603 TLB miss exceptions that don't require anymore
kernel page table if DEBUG_PAGEALLOC.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/da51f7ec632825a4ce43290a904aad61648408c0.1606285013.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/mm/book3s32/mmu.c')
| -rw-r--r-- | arch/powerpc/mm/book3s32/mmu.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/arch/powerpc/mm/book3s32/mmu.c b/arch/powerpc/mm/book3s32/mmu.c index a59e7ec98180..5c60dcade90a 100644 --- a/arch/powerpc/mm/book3s32/mmu.c +++ b/arch/powerpc/mm/book3s32/mmu.c @@ -157,11 +157,9 @@ unsigned long __init mmu_mapin_ram(unsigned long base, unsigned long top) unsigned long done; unsigned long border = (unsigned long)__init_begin - PAGE_OFFSET; - if (__map_without_bats) { - pr_debug("RAM mapped without BATs\n"); - return base; - } - if (debug_pagealloc_enabled()) { + + if (debug_pagealloc_enabled() || __map_without_bats) { + pr_debug_once("Read-Write memory mapped without BATs\n"); if (base >= border) return base; if (top >= border) |