[PATCH 0/2] Fix a doorbell race on Cortex-A78AE
Shani Peretz
shperetz at nvidia.com
Sun Mar 22 11:24:57 CET 2026
Fix a doorbell race on Cortex-A78AE where the compiler reorders a
64-bit WQE load before the 32-bit stores that construct it, causing
stale data to reach the hardware doorbell.
The first patch fixes the root cause by passing a pointer and adding
a compiler barrier;
The second patch reverts the crypto march extension workaround that is
no longer needed and that broke builds without AES support.
Shani Peretz (2):
common/mlx5: fix doorbell race from compiler reordering
config/arm: revert forced crypto extension for Cortex-A78AE
config/arm/meson.build | 7 ++-----
drivers/common/mlx5/mlx5_common.h | 12 ++++++++----
drivers/compress/mlx5/mlx5_compress.c | 2 +-
drivers/crypto/mlx5/mlx5_crypto_gcm.c | 6 +++---
drivers/crypto/mlx5/mlx5_crypto_xts.c | 2 +-
drivers/net/mlx5/mlx5_flow_aso.c | 12 ++++++------
drivers/net/mlx5/mlx5_flow_quota.c | 2 +-
drivers/net/mlx5/mlx5_rxq.c | 3 ++-
drivers/net/mlx5/mlx5_tx.h | 4 ++--
drivers/net/mlx5/mlx5_txpp.c | 4 ++--
drivers/regex/mlx5/mlx5_regex_fastpath.c | 2 +-
drivers/vdpa/mlx5/mlx5_vdpa_event.c | 2 +-
12 files changed, 30 insertions(+), 28 deletions(-)
--
2.34.1
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