diff options
Diffstat (limited to 'accel/tcg/tb-jmp-cache.h')
| -rw-r--r-- | accel/tcg/tb-jmp-cache.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/accel/tcg/tb-jmp-cache.h b/accel/tcg/tb-jmp-cache.h index bb424c8a05..4ab8553afc 100644 --- a/accel/tcg/tb-jmp-cache.h +++ b/accel/tcg/tb-jmp-cache.h @@ -13,9 +13,11 @@ #define TB_JMP_CACHE_SIZE (1 << TB_JMP_CACHE_BITS) /* - * Accessed in parallel; all accesses to 'tb' must be atomic. - * For CF_PCREL, accesses to 'pc' must be protected by a - * load_acquire/store_release to 'tb'. + * Invalidated in parallel; all accesses to 'tb' must be atomic. + * A valid entry is read/written by a single CPU, therefore there is + * no need for qatomic_rcu_read() and pc is always consistent with a + * non-NULL value of 'tb'. Strictly speaking pc is only needed for + * CF_PCREL, but it's used always for simplicity. */ struct CPUJumpCache { struct rcu_head rcu; |