diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/filter.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/filter.h b/include/linux/filter.h index 67d337ede91b..f68694f94ee7 100644 --- a/include/linux/filter.h +++ b/include/linux/filter.h @@ -21,6 +21,7 @@ #include <linux/if_vlan.h> #include <linux/vmalloc.h> #include <linux/sockptr.h> +#include <linux/static_call.h> #include <linux/u64_stats_sync.h> #include <net/sch_generic.h> @@ -1314,6 +1315,15 @@ extern long bpf_jit_limit_max; typedef void (*bpf_jit_fill_hole_t)(void *area, unsigned int size); +/* + * Flush the indirect branch predictors before reusing JIT memory, so that + * indirect jumps into a newly written program don't reuse predictions left + * behind by an old program that occupied the same space. + */ +void bpf_arch_pred_flush(void); +DECLARE_STATIC_CALL(bpf_arch_pred_flush, bpf_arch_pred_flush); +DECLARE_STATIC_KEY_FALSE(bpf_pred_flush_enabled); + void bpf_jit_fill_hole_with_zero(void *area, unsigned int size); struct bpf_binary_header * |