diff options
Diffstat (limited to 'tools/memory-model/linux-kernel.cat')
| -rw-r--r-- | tools/memory-model/linux-kernel.cat | 39 |
1 files changed, 27 insertions, 12 deletions
diff --git a/tools/memory-model/linux-kernel.cat b/tools/memory-model/linux-kernel.cat index 8f23c74a96fd..8dcb37835b61 100644 --- a/tools/memory-model/linux-kernel.cat +++ b/tools/memory-model/linux-kernel.cat @@ -33,7 +33,7 @@ let mb = ([M] ; fencerel(Mb) ; [M]) | ([M] ; po? ; [LKW] ; fencerel(After-spinlock) ; [M]) | ([M] ; po ; [UL] ; (co | po) ; [LKW] ; fencerel(After-unlock-lock) ; [M]) -let gp = po ; [Sync-rcu] ; po? +let gp = po ; [Sync-rcu | Sync-srcu] ; po? let strong-fence = mb | gp @@ -91,32 +91,47 @@ acyclic pb as propagation (*******) (* - * Effect of read-side critical section proceeds from the rcu_read_lock() - * onward on the one hand and from the rcu_read_unlock() backwards on the - * other hand. + * Effects of read-side critical sections proceed from the rcu_read_unlock() + * or srcu_read_unlock() backwards on the one hand, and from the + * rcu_read_lock() or srcu_read_lock() forwards on the other hand. + * + * In the definition of rcu-fence below, the po term at the left-hand side + * of each disjunct and the po? term at the right-hand end have been factored + * out. They have been moved into the definitions of rcu-link and rb. + * This was necessary in order to apply the "& loc" tests correctly. *) -let rscs = po ; crit^-1 ; po? +let rcu-gp = [Sync-rcu] (* Compare with gp *) +let srcu-gp = [Sync-srcu] +let rcu-rscsi = rcu-rscs^-1 +let srcu-rscsi = srcu-rscs^-1 (* * The synchronize_rcu() strong fence is special in that it can order not * one but two non-rf relations, but only in conjunction with an RCU * read-side critical section. *) -let rcu-link = hb* ; pb* ; prop +let rcu-link = po? ; hb* ; pb* ; prop ; po (* * Any sequence containing at least as many grace periods as RCU read-side * critical sections (joined by rcu-link) acts as a generalized strong fence. + * Likewise for SRCU grace periods and read-side critical sections, provided + * the synchronize_srcu() and srcu_read_[un]lock() calls refer to the same + * struct srcu_struct location. *) -let rec rcu-fence = gp | - (gp ; rcu-link ; rscs) | - (rscs ; rcu-link ; gp) | - (gp ; rcu-link ; rcu-fence ; rcu-link ; rscs) | - (rscs ; rcu-link ; rcu-fence ; rcu-link ; gp) | +let rec rcu-fence = rcu-gp | srcu-gp | + (rcu-gp ; rcu-link ; rcu-rscsi) | + ((srcu-gp ; rcu-link ; srcu-rscsi) & loc) | + (rcu-rscsi ; rcu-link ; rcu-gp) | + ((srcu-rscsi ; rcu-link ; srcu-gp) & loc) | + (rcu-gp ; rcu-link ; rcu-fence ; rcu-link ; rcu-rscsi) | + ((srcu-gp ; rcu-link ; rcu-fence ; rcu-link ; srcu-rscsi) & loc) | + (rcu-rscsi ; rcu-link ; rcu-fence ; rcu-link ; rcu-gp) | + ((srcu-rscsi ; rcu-link ; rcu-fence ; rcu-link ; srcu-gp) & loc) | (rcu-fence ; rcu-link ; rcu-fence) (* rb orders instructions just as pb does *) -let rb = prop ; rcu-fence ; hb* ; pb* +let rb = prop ; po ; rcu-fence ; po? ; hb* ; pb* irreflexive rb as rcu |