From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
To: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Boqun Feng <boqun.feng@gmail.com>,
Peter Zijlstra <peterz@infradead.org>,
Paul Turner <pjt@google.com>, Andrew Hunter <ahh@google.com>,
Andy Lutomirski <luto@amacapital.net>,
Dave Watson <davejwatson@fb.com>,
Josh Triplett <josh@joshtriplett.org>,
Will Deacon <will.deacon@arm.com>
Cc: linux-kernel@vger.kernel.org,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
linuxppc-dev@lists.ozlabs.org
Subject: [RFC PATCH for 4.15 08/14] Restartable sequences: Wire up powerpc system call
Date: Thu, 12 Oct 2017 19:03:20 -0400 [thread overview]
Message-ID: <20171012230326.19984-9-mathieu.desnoyers@efficios.com> (raw)
In-Reply-To: <20171012230326.19984-1-mathieu.desnoyers@efficios.com>
From: Boqun Feng <boqun.feng@gmail.com>
Wire up the rseq system call on powerpc.
This provides an ABI improving the speed of a user-space getcpu
operation on powerpc by skipping the getcpu system call on the fast
path, as well as improving the speed of user-space operations on per-cpu
data compared to using load-reservation/store-conditional atomics.
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Paul Mackerras <paulus@samba.org>
CC: Michael Ellerman <mpe@ellerman.id.au>
CC: Peter Zijlstra <peterz@infradead.org>
CC: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
CC: linuxppc-dev@lists.ozlabs.org
---
arch/powerpc/include/asm/systbl.h | 1 +
arch/powerpc/include/asm/unistd.h | 2 +-
arch/powerpc/include/uapi/asm/unistd.h | 1 +
3 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/include/asm/systbl.h b/arch/powerpc/include/asm/systbl.h
index 1c9470881c4a..a805a4d10d1c 100644
--- a/arch/powerpc/include/asm/systbl.h
+++ b/arch/powerpc/include/asm/systbl.h
@@ -388,3 +388,4 @@ COMPAT_SYS_SPU(preadv2)
COMPAT_SYS_SPU(pwritev2)
SYSCALL(kexec_file_load)
SYSCALL(statx)
+SYSCALL(rseq)
diff --git a/arch/powerpc/include/asm/unistd.h b/arch/powerpc/include/asm/unistd.h
index 9ba11dbcaca9..e76bd5601ea4 100644
--- a/arch/powerpc/include/asm/unistd.h
+++ b/arch/powerpc/include/asm/unistd.h
@@ -12,7 +12,7 @@
#include <uapi/asm/unistd.h>
-#define NR_syscalls 384
+#define NR_syscalls 385
#define __NR__exit __NR_exit
diff --git a/arch/powerpc/include/uapi/asm/unistd.h b/arch/powerpc/include/uapi/asm/unistd.h
index b85f14228857..854a8db4144e 100644
--- a/arch/powerpc/include/uapi/asm/unistd.h
+++ b/arch/powerpc/include/uapi/asm/unistd.h
@@ -394,5 +394,6 @@
#define __NR_pwritev2 381
#define __NR_kexec_file_load 382
#define __NR_statx 383
+#define __NR_rseq 384
#endif /* _UAPI_ASM_POWERPC_UNISTD_H_ */
--
2.11.0
next prev parent reply other threads:[~2017-10-12 23:06 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-12 23:03 [RFC PATCH v9 for 4.15 00/14] Restartable sequences and CPU op vector system calls Mathieu Desnoyers
2017-10-12 23:03 ` [RFC PATCH v9 for 4.15 01/14] Restartable sequences system call Mathieu Desnoyers
2017-10-13 0:36 ` Linus Torvalds
2017-10-13 9:35 ` Ben Maurer
2017-10-13 18:30 ` Linus Torvalds
2017-10-13 20:54 ` Paul E. McKenney
2017-10-13 21:05 ` Linus Torvalds
2017-10-13 21:21 ` Paul E. McKenney
2017-10-13 21:36 ` Mathieu Desnoyers
2017-10-16 16:04 ` Carlos O'Donell
2017-10-16 16:46 ` Andi Kleen
2017-10-16 22:17 ` Mathieu Desnoyers
2017-10-17 16:19 ` Ben Maurer
2017-10-17 16:33 ` Mathieu Desnoyers
2017-10-17 16:41 ` Ben Maurer
2017-10-17 17:48 ` Mathieu Desnoyers
2017-10-18 6:22 ` Greg KH
2017-10-18 16:28 ` Mathieu Desnoyers
2017-10-14 3:01 ` Andi Kleen
2017-10-14 4:05 ` Linus Torvalds
2017-10-14 11:37 ` Mathieu Desnoyers
2017-10-13 12:50 ` Florian Weimer
2017-10-13 13:40 ` Mathieu Desnoyers
2017-10-13 13:56 ` Florian Weimer
2017-10-13 14:27 ` Mathieu Desnoyers
2017-10-13 17:24 ` Andy Lutomirski
2017-10-13 17:53 ` Florian Weimer
2017-10-13 18:17 ` Andy Lutomirski
2017-10-14 11:53 ` Mathieu Desnoyers
2017-10-18 16:41 ` Ben Maurer
2017-10-18 18:11 ` Mathieu Desnoyers
2017-10-19 11:35 ` Mathieu Desnoyers
2017-10-19 17:01 ` Florian Weimer
2017-10-23 17:30 ` Ben Maurer
2017-10-23 20:44 ` Mathieu Desnoyers
2017-10-12 23:03 ` [RFC PATCH for 4.15 02/14] tracing: instrument restartable sequences Mathieu Desnoyers
2017-10-12 23:03 ` [RFC PATCH for 4.15 03/14] Restartable sequences: ARM 32 architecture support Mathieu Desnoyers
2017-10-12 23:03 ` [RFC PATCH for 4.15 04/14] Restartable sequences: wire up ARM 32 system call Mathieu Desnoyers
2017-10-12 23:03 ` [RFC PATCH for 4.15 05/14] Restartable sequences: x86 32/64 architecture support Mathieu Desnoyers
2017-10-12 23:03 ` [RFC PATCH for 4.15 06/14] Restartable sequences: wire up x86 32/64 system call Mathieu Desnoyers
2017-10-12 23:03 ` [RFC PATCH for 4.15 07/14] Restartable sequences: powerpc architecture support Mathieu Desnoyers
2017-10-12 23:03 ` Mathieu Desnoyers [this message]
2017-10-12 23:03 ` [RFC PATCH for 4.15 09/14] Provide cpu_opv system call Mathieu Desnoyers
2017-10-13 13:57 ` Alan Cox
2017-10-13 14:50 ` Mathieu Desnoyers
2017-10-14 14:22 ` Mathieu Desnoyers
2017-10-13 17:20 ` Andy Lutomirski
2017-10-14 2:50 ` Andi Kleen
2017-10-14 13:35 ` Mathieu Desnoyers
2017-10-12 23:03 ` [RFC PATCH for 4.15 10/14] cpu_opv: Wire up x86 32/64 " Mathieu Desnoyers
2017-10-12 23:03 ` [RFC PATCH for 4.15 11/14] cpu_opv: Wire up powerpc " Mathieu Desnoyers
2017-10-12 23:03 ` [RFC PATCH for 4.15 12/14] cpu_opv: Wire up ARM32 " Mathieu Desnoyers
2017-10-12 23:03 ` [RFC PATCH for 4.15 13/14] cpu_opv: Implement selftests Mathieu Desnoyers
2017-10-12 23:03 ` [RFC PATCH for 4.15 14/14] Restartable sequences: Provide self-tests Mathieu Desnoyers
2017-10-16 2:51 ` Michael Ellerman
2017-10-16 14:23 ` Mathieu Desnoyers
2017-10-17 10:38 ` Michael Ellerman
2017-10-17 13:50 ` Mathieu Desnoyers
2017-10-16 18:50 ` Mathieu Desnoyers
2017-10-17 10:36 ` Michael Ellerman
2017-10-17 13:50 ` Mathieu Desnoyers
2017-10-18 5:45 ` Michael Ellerman
2017-10-16 3:00 ` Michael Ellerman
2017-10-16 3:48 ` Boqun Feng
2017-10-16 11:48 ` Michael Ellerman
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