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| author | Jonas Oberhauser <jonas.oberhauser@huaweicloud.com> | 2024-09-30 13:57:07 +0300 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2025-02-20 18:40:23 +0300 |
| commit | 723177d712241238101b672b97b35734f86481f3 (patch) | |
| tree | d6b34d117cefa27589320b2bed7140c94e4918e2 | |
| parent | de6f99723392f1c3a7bc103cba81bd9ba1d1708f (diff) | |
| download | linux-723177d712241238101b672b97b35734f86481f3.tar.xz | |
tools/memory-model: Define applicable tags on operation in tools/...
Herd7 transforms reads, writes, and read-modify-writes by eliminating
'acquire tags from writes, 'release tags from reads, and 'acquire,
'release, and 'mb tags from failed read-modify-writes. We emulate this
behavior by redefining Acquire, Release, and Mb sets in linux-kernel.bell
to explicitly exclude those combinations.
Herd7 furthermore adds 'noreturn tag to certain reads. Currently herd7
does not allow specifying the 'noreturn tag manually, but such manual
declaration (e.g., through a syntax __atomic_op{noreturn}) would add
invalid 'noreturn tags to writes; in preparation, we already also exclude
this combination.
Signed-off-by: Jonas Oberhauser <jonas.oberhauser@huaweicloud.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Reviewed-by: Boqun Feng <boqun.feng@gmail.com>
Tested-by: Boqun Feng <boqun.feng@gmail.com>
| -rw-r--r-- | tools/memory-model/linux-kernel.bell | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/tools/memory-model/linux-kernel.bell b/tools/memory-model/linux-kernel.bell index dba6b5b6dee0..7c9ae48b9437 100644 --- a/tools/memory-model/linux-kernel.bell +++ b/tools/memory-model/linux-kernel.bell @@ -36,6 +36,17 @@ enum Barriers = 'wmb (*smp_wmb*) || 'after-srcu-read-unlock (*smp_mb__after_srcu_read_unlock*) instructions F[Barriers] + +(* + * Filter out syntactic annotations that do not provide the corresponding + * semantic ordering, such as Acquire on a store or Mb on a failed RMW. + *) +let FailedRMW = RMW \ (domain(rmw) | range(rmw)) +let Acquire = Acquire \ W \ FailedRMW +let Release = Release \ R \ FailedRMW +let Mb = Mb \ FailedRMW +let Noreturn = Noreturn \ W + (* SRCU *) enum SRCU = 'srcu-lock || 'srcu-unlock || 'sync-srcu instructions SRCU[SRCU] |