From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
"Paul E . McKenney" <paulmck@kernel.org>,
Boqun Feng <boqun.feng@gmail.com>,
"H . Peter Anvin" <hpa@zytor.com>, Paul Turner <pjt@google.com>,
linux-api@vger.kernel.org,
Christian Brauner <christian.brauner@ubuntu.com>,
Florian Weimer <fw@deneb.enyo.de>,
David.Laight@ACULAB.COM, carlos@redhat.com,
Peter Oskolkov <posk@posk.io>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Subject: [RFC PATCH v2 11/11] selftests/rseq: Implement rseq vm_vcpu_id field support
Date: Fri, 18 Feb 2022 16:06:33 -0500 [thread overview]
Message-ID: <20220218210633.23345-12-mathieu.desnoyers@efficios.com> (raw)
In-Reply-To: <20220218210633.23345-1-mathieu.desnoyers@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---
tools/testing/selftests/rseq/rseq-abi.h | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/tools/testing/selftests/rseq/rseq-abi.h b/tools/testing/selftests/rseq/rseq-abi.h
index a1faa9162d52..1ee4740ebe94 100644
--- a/tools/testing/selftests/rseq/rseq-abi.h
+++ b/tools/testing/selftests/rseq/rseq-abi.h
@@ -155,6 +155,15 @@ struct rseq_abi {
*/
__u32 node_id;
+ /*
+ * Restartable sequences vm_vcpu_id field. Updated by the kernel. Read by
+ * user-space with single-copy atomicity semantics. This field should
+ * only be read by the thread which registered this data structure.
+ * Aligned on 32-bit. Contains the current thread's virtual CPU ID
+ * (allocated uniquely within a memory space).
+ */
+ __u32 vm_vcpu_id;
+
/*
* Flexible array member at end of structure, after last feature field.
*/
--
2.17.1
prev parent reply other threads:[~2022-02-18 21:16 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-18 21:06 [RFC PATCH v2 00/11] RSEQ node id and virtual cpu id extensions Mathieu Desnoyers
2022-02-18 21:06 ` [RFC PATCH v2 01/11] rseq: Introduce feature size and alignment ELF auxiliary vector entries Mathieu Desnoyers
2022-02-18 21:06 ` [RFC PATCH v2 02/11] rseq: Introduce extensible rseq ABI Mathieu Desnoyers
2022-02-18 21:06 ` [RFC PATCH v2 03/11] rseq: extend struct rseq with numa node id Mathieu Desnoyers
2022-02-18 21:06 ` [RFC PATCH v2 04/11] selftests/rseq: Use ELF auxiliary vector for extensible rseq Mathieu Desnoyers
2022-02-18 21:06 ` [RFC PATCH v2 05/11] selftests/rseq: Implement rseq numa node id field selftest Mathieu Desnoyers
2022-02-18 21:06 ` [RFC PATCH v2 06/11] lib: invert _find_next_bit source arguments Mathieu Desnoyers
2022-02-18 21:06 ` [RFC PATCH v2 07/11] lib: implement find_{first,next}_{zero,one}_and_zero_bit Mathieu Desnoyers
2022-02-18 21:06 ` [RFC PATCH v2 08/11] cpumask: implement cpumask_{first,next}_{zero,one}_and_zero Mathieu Desnoyers
2022-02-18 21:06 ` [RFC PATCH v2 09/11] sched: Introduce per memory space current virtual cpu id Mathieu Desnoyers
2022-02-21 17:38 ` [RFC PATCH v3 " Mathieu Desnoyers
2022-02-25 17:35 ` [RFC PATCH v2 " Jonathan Corbet
2022-02-25 17:56 ` Mathieu Desnoyers
2022-02-25 18:15 ` Jonathan Corbet
2022-02-25 18:39 ` Mathieu Desnoyers
2022-02-25 19:24 ` Jonathan Corbet
2022-02-25 21:21 ` Mathieu Desnoyers
2022-02-18 21:06 ` [RFC PATCH v2 10/11] rseq: extend struct rseq with per memory space vcpu id Mathieu Desnoyers
2022-02-18 21:06 ` Mathieu Desnoyers [this message]
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