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| author |   Tianyu Li <tianyu.li@arm.com> | 2021-08-26 09:43:42 +0800 |
|---|---|---|
| committer | Tianyu Li <tianyu.li@arm.com> | 2021-08-26 10:28:17 +0800 |
| commit | c6b6816bed8a4fa2baa396bc0af56e4ac373d713 (patch) | |
| tree | ffeba68e517c6b803ff0faf650c5f243c51a7edb /src | |
| parent | ee04de552d1749948e8802c2c6a87646f3b81625 (diff) | |
acl: fix prefetch out of struct bound on Arm
fa_session_t *sess;
CLIB_PREFETCH (sess, 2 * CLIB_CACHE_LINE_BYTES, STORE);
sizeof(fa_session_t) is 128 bytes
i) on 64B cacheline size Arm machine,
above CLIB_PREFETCH () macro will be expand to
__builtin_prefetch(sess)
__builtin_prefetch(sess + 64)
__builtin_prefetch(sess + 128) << prefetch is out of range of *sess.
__builtin_prefetch(sess + 192) <<
ii) on 128B cacheline size Arm machine, CLIB_PREFETCH () expands to
__builtin_prefetch(sess)
__builtin_prefetch(sess + 128) << still out of bound
Solution:
Change to CLIB_PREFETCH (sess, sizeof(*sess), STORE);
Type: fix
Signed-off-by: Tianyu Li <tianyu.li@arm.com>
Reviewed-by: Lijian Zhang <lijian.zhang@arm.com>
Change-Id: I4b3d4fc55747f3d9ad1bcf24f8834601a03ef55e
Diffstat (limited to 'src')
| -rw-r--r-- | src/plugins/acl/dataplane_node.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/plugins/acl/dataplane_node.c b/src/plugins/acl/dataplane_node.c index 1a050f54b14..4bef8f07770 100644 --- a/src/plugins/acl/dataplane_node.c +++ b/src/plugins/acl/dataplane_node.c @@ -176,7 +176,7 @@ prefetch_session_entry (acl_main_t * am, fa_full_session_id_t f_sess_id) { fa_session_t *sess = get_session_ptr_no_check (am, f_sess_id.thread_index, f_sess_id.session_index); - CLIB_PREFETCH (sess, 2 * CLIB_CACHE_LINE_BYTES, STORE); + CLIB_PREFETCH (sess, sizeof (*sess), STORE); } always_inline u8 |