From: "Paul E. McKenney" <paulmck@kernel.org>
To: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
lkmm@lists.linux.dev, kernel-team@meta.com, mingo@kernel.org
Cc: stern@rowland.harvard.edu, parri.andrea@gmail.com,
will@kernel.org, peterz@infradead.org, boqun.feng@gmail.com,
npiggin@gmail.com, dhowells@redhat.com, j.alglave@ucl.ac.uk,
luc.maranget@inria.fr, akiyks@gmail.com,
Puranjay Mohan <puranjay@kernel.org>,
"Paul E . McKenney" <paulmck@kernel.org>,
Daniel Lustig <dlustig@nvidia.com>,
Joel Fernandes <joel@joelfernandes.org>
Subject: [PATCH memory-model 1/7] tools/memory-model: Add atomic_and()/or()/xor() and add_negative
Date: Thu, 20 Feb 2025 08:13:57 -0800 [thread overview]
Message-ID: <20250220161403.800831-1-paulmck@kernel.org> (raw)
In-Reply-To: <8cfb51e3-9726-4285-b8ca-0d0abcacb07e@paulmck-laptop>
From: Puranjay Mohan <puranjay@kernel.org>
Pull-849[1] added the support of '&', '|', and '^' to the herd7 tool's
atomics operations.
Use these in linux-kernel.def to implement atomic_and()/or()/xor() with
all their ordering variants.
atomic_add_negative() is already available so add its acquire, release,
and relaxed ordering variants.
[1] https://github.com/herd/herdtools7/pull/849
Signed-off-by: Puranjay Mohan <puranjay@kernel.org>
Acked-by: Andrea Parri <parri.andrea@gmail.com>
Reviewed-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Will Deacon <will@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Jade Alglave <j.alglave@ucl.ac.uk>
Cc: Luc Maranget <luc.maranget@inria.fr>
Cc: Akira Yokosawa <akiyks@gmail.com>
Cc: Daniel Lustig <dlustig@nvidia.com>
Cc: Joel Fernandes <joel@joelfernandes.org>
Cc: <linux-arch@vger.kernel.org>
---
tools/memory-model/linux-kernel.def | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/tools/memory-model/linux-kernel.def b/tools/memory-model/linux-kernel.def
index 88a39601f5256..d1f11930ec512 100644
--- a/tools/memory-model/linux-kernel.def
+++ b/tools/memory-model/linux-kernel.def
@@ -65,6 +65,9 @@ atomic_set_release(X,V) { smp_store_release(X,V); }
atomic_add(V,X) { __atomic_op(X,+,V); }
atomic_sub(V,X) { __atomic_op(X,-,V); }
+atomic_and(V,X) { __atomic_op(X,&,V); }
+atomic_or(V,X) { __atomic_op(X,|,V); }
+atomic_xor(V,X) { __atomic_op(X,^,V); }
atomic_inc(X) { __atomic_op(X,+,1); }
atomic_dec(X) { __atomic_op(X,-,1); }
@@ -77,6 +80,21 @@ atomic_fetch_add_relaxed(V,X) __atomic_fetch_op{once}(X,+,V)
atomic_fetch_add_acquire(V,X) __atomic_fetch_op{acquire}(X,+,V)
atomic_fetch_add_release(V,X) __atomic_fetch_op{release}(X,+,V)
+atomic_fetch_and(V,X) __atomic_fetch_op{mb}(X,&,V)
+atomic_fetch_and_relaxed(V,X) __atomic_fetch_op{once}(X,&,V)
+atomic_fetch_and_acquire(V,X) __atomic_fetch_op{acquire}(X,&,V)
+atomic_fetch_and_release(V,X) __atomic_fetch_op{release}(X,&,V)
+
+atomic_fetch_or(V,X) __atomic_fetch_op{mb}(X,|,V)
+atomic_fetch_or_relaxed(V,X) __atomic_fetch_op{once}(X,|,V)
+atomic_fetch_or_acquire(V,X) __atomic_fetch_op{acquire}(X,|,V)
+atomic_fetch_or_release(V,X) __atomic_fetch_op{release}(X,|,V)
+
+atomic_fetch_xor(V,X) __atomic_fetch_op{mb}(X,^,V)
+atomic_fetch_xor_relaxed(V,X) __atomic_fetch_op{once}(X,^,V)
+atomic_fetch_xor_acquire(V,X) __atomic_fetch_op{acquire}(X,^,V)
+atomic_fetch_xor_release(V,X) __atomic_fetch_op{release}(X,^,V)
+
atomic_inc_return(X) __atomic_op_return{mb}(X,+,1)
atomic_inc_return_relaxed(X) __atomic_op_return{once}(X,+,1)
atomic_inc_return_acquire(X) __atomic_op_return{acquire}(X,+,1)
@@ -117,3 +135,6 @@ atomic_sub_and_test(V,X) __atomic_op_return{mb}(X,-,V) == 0
atomic_dec_and_test(X) __atomic_op_return{mb}(X,-,1) == 0
atomic_inc_and_test(X) __atomic_op_return{mb}(X,+,1) == 0
atomic_add_negative(V,X) __atomic_op_return{mb}(X,+,V) < 0
+atomic_add_negative_relaxed(V,X) __atomic_op_return{once}(X,+,V) < 0
+atomic_add_negative_acquire(V,X) __atomic_op_return{acquire}(X,+,V) < 0
+atomic_add_negative_release(V,X) __atomic_op_return{release}(X,+,V) < 0
--
2.40.1
next prev parent reply other threads:[~2025-02-20 16:14 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-20 16:13 [PATCH memory-model 0/7] LKMM updates for v6.15 Paul E. McKenney
2025-02-20 16:13 ` Paul E. McKenney [this message]
2025-02-20 16:13 ` [PATCH memory-model 2/7] tools/memory-model: Add atomic_andnot() with its variants Paul E. McKenney
2025-02-20 16:13 ` [PATCH memory-model 3/7] tools/memory-model: Legitimize current use of tags in LKMM macros Paul E. McKenney
2025-02-20 16:14 ` [PATCH memory-model 4/7] tools/memory-model: Define applicable tags on operation in tools/ Paul E. McKenney
2025-02-20 16:14 ` [PATCH memory-model 5/7] tools/memory-model: Define effect of Mb tags on RMWs " Paul E. McKenney
2025-02-20 16:14 ` [PATCH memory-model 6/7] tools/memory-model: Switch to softcoded herd7 tags Paul E. McKenney
2025-02-25 4:24 ` Akira Yokosawa
2025-02-25 7:40 ` Hernan Ponce de Leon
2025-02-20 16:14 ` [PATCH memory-model 7/7] tools/memory-model: Distinguish between syntactic and semantic tags Paul E. McKenney
2025-02-25 4:28 ` Akira Yokosawa
2025-02-25 18:18 ` Paul E. McKenney
-- strict thread matches above, loose matches on Subject: below --
2024-08-02 0:22 [PATCH memory-model 0/7] LKMM updates for v6.12 Paul E. McKenney
2024-08-02 0:22 ` [PATCH memory-model 1/7] tools/memory-model: Add atomic_and()/or()/xor() and add_negative Paul E. McKenney
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