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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2020-02-03 19:47:37 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-02-19 14:46:11 +0300 |
| commit | e1347a020b81fe47c80cd277bfaa61295a9482a4 (patch) | |
| tree | 6357346fd4a7dea7e7cf9064a4e63b6b4504cc5e /arch/powerpc/mm/book3s32 | |
| parent | a83836dbc53e96f13fec248ecc201d18e1e3111d (diff) | |
| download | linux-e1347a020b81fe47c80cd277bfaa61295a9482a4.tar.xz | |
powerpc/32s: Slenderize _tlbia() for powerpc 603/603e
_tlbia() is a function used only on 603/603e core, ie on CPUs which
don't have a hash table.
_tlbia() uses the tlbia macro which implements a loop of 1024 tlbie.
On the 603/603e core, flushing the entire TLB requires no more than
32 tlbie.
Replace tlbia by a loop of 32 tlbie.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/12f4f4f0ff89aeab3b937fc96c84fb35e1b2517e.1580748445.git.christophe.leroy@c-s.fr
Diffstat (limited to 'arch/powerpc/mm/book3s32')
| -rw-r--r-- | arch/powerpc/mm/book3s32/hash_low.S | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/arch/powerpc/mm/book3s32/hash_low.S b/arch/powerpc/mm/book3s32/hash_low.S index c11b0a005196..a5039ad10429 100644 --- a/arch/powerpc/mm/book3s32/hash_low.S +++ b/arch/powerpc/mm/book3s32/hash_low.S @@ -696,18 +696,21 @@ _GLOBAL(_tlbia) bne- 10b stwcx. r8,0,r9 bne- 10b +#endif /* CONFIG_SMP */ + li r5, 32 + lis r4, KERNELBASE@h + mtctr r5 sync - tlbia +0: tlbie r4 + addi r4, r4, 0x1000 + bdnz 0b sync +#ifdef CONFIG_SMP TLBSYNC li r0,0 stw r0,0(r9) /* clear mmu_hash_lock */ mtmsr r10 SYNC_601 isync -#else /* CONFIG_SMP */ - sync - tlbia - sync #endif /* CONFIG_SMP */ blr |