diff options
| author | David Daney <ddaney@caviumnetworks.com> | 2009-05-12 21:41:53 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2009-06-17 12:06:26 +0200 |
| commit | 41f0e4d041aa30507a34998c29d0b7ac0bede277 (patch) | |
| tree | 7e84895b367ff6cfad682c6177c5ff706bb177c8 /arch/mips/mm | |
| parent | MIPS: Fold the TLB refill at the vmalloc path if possible. (diff) | |
| download | linux-41f0e4d041aa30507a34998c29d0b7ac0bede277.tar.xz linux-41f0e4d041aa30507a34998c29d0b7ac0bede277.zip | |
MIPS: Allow R2 CPUs to turn off generation of 'ehb' instructions.
Some CPUs do not need ehb instructions after writing CP0 registers.
By allowing ehb generation to be overridden in
cpu-feature-overrides.h, we can save a few instructions in the TLB
handler hot paths.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/mm')
| -rw-r--r-- | arch/mips/mm/tlbex.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c index d9a18b2b7f82..0e34faaadb5c 100644 --- a/arch/mips/mm/tlbex.c +++ b/arch/mips/mm/tlbex.c @@ -259,7 +259,8 @@ static void __cpuinit build_tlb_write_entry(u32 **p, struct uasm_label **l, } if (cpu_has_mips_r2) { - uasm_i_ehb(p); + if (cpu_has_mips_r2_exec_hazard) + uasm_i_ehb(p); tlbw(p); return; } |