diff options
Diffstat (limited to 'arch/arm64/kernel/alternative.c')
| -rw-r--r-- | arch/arm64/kernel/alternative.c | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/arch/arm64/kernel/alternative.c b/arch/arm64/kernel/alternative.c index 1a3badab800a..ad7821d64a1d 100644 --- a/arch/arm64/kernel/alternative.c +++ b/arch/arm64/kernel/alternative.c @@ -28,12 +28,18 @@ extern struct alt_instr __alt_instructions[], __alt_instructions_end[]; -static int __apply_alternatives(void *dummy) +struct alt_region { + struct alt_instr *begin; + struct alt_instr *end; +}; + +static int __apply_alternatives(void *alt_region) { struct alt_instr *alt; + struct alt_region *region = alt_region; u8 *origptr, *replptr; - for (alt = __alt_instructions; alt < __alt_instructions_end; alt++) { + for (alt = region->begin; alt < region->end; alt++) { if (!cpus_have_cap(alt->cpufeature)) continue; @@ -51,10 +57,25 @@ static int __apply_alternatives(void *dummy) return 0; } -void apply_alternatives(void) +void apply_alternatives_all(void) { + struct alt_region region = { + .begin = __alt_instructions, + .end = __alt_instructions_end, + }; + /* better not try code patching on a live SMP system */ - stop_machine(__apply_alternatives, NULL, NULL); + stop_machine(__apply_alternatives, ®ion, NULL); +} + +void apply_alternatives(void *start, size_t length) +{ + struct alt_region region = { + .begin = start, + .end = start + length, + }; + + __apply_alternatives(®ion); } void free_alternatives_memory(void) |