From: Mathieu Desnoyers <mathieu.desnoyers-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
To: Ingo Molnar <mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Andy Lutomirski <luto-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
"Paul E . McKenney"
<paulmck-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>,
Boqun Feng <boqun.feng-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Andrew Hunter <ahh-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Maged Michael
<maged.michael-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Avi Kivity <avi-VrcmuVmyx1hWk0Htik3J/w@public.gmane.org>,
Benjamin Herrenschmidt
<benh-XVmvHMARGAS8U2dJNN8I7kB+6BGkLq7r@public.gmane.org>,
Paul Mackerras <paulus-eUNUBHrolfbYtjvyW6yDsg@public.gmane.org>,
Michael Ellerman <mpe-Gsx/Oe8HsFggBc27wqDAHg@public.gmane.org>,
Dave Watson <davejwatson-b10kYP2dOMg@public.gmane.org>,
Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
"H . Peter Anvin" <hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>,
Andrea Parri
<parri.andrea-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Russell King <linux-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org>,
Greg Hackmann <ghackmann-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org>,
David Sehr <sehr-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Linus Torvalds
<torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
x86@kernel.
Subject: [PATCH for 4.16 10/11] membarrier: arm64: Provide core serializing command
Date: Wed, 10 Jan 2018 10:46:24 -0500 [thread overview]
Message-ID: <20180110154625.4319-11-mathieu.desnoyers@efficios.com> (raw)
In-Reply-To: <20180110154625.4319-1-mathieu.desnoyers-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
CC: Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
CC: Andy Lutomirski <luto-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
CC: Paul E. McKenney <paulmck-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
CC: Boqun Feng <boqun.feng-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
CC: Andrew Hunter <ahh-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
CC: Maged Michael <maged.michael-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
CC: Avi Kivity <avi-VrcmuVmyx1hWk0Htik3J/w@public.gmane.org>
CC: Benjamin Herrenschmidt <benh-XVmvHMARGAS8U2dJNN8I7kB+6BGkLq7r@public.gmane.org>
CC: Paul Mackerras <paulus-eUNUBHrolfbYtjvyW6yDsg@public.gmane.org>
CC: Michael Ellerman <mpe-Gsx/Oe8HsFggBc27wqDAHg@public.gmane.org>
CC: Dave Watson <davejwatson-b10kYP2dOMg@public.gmane.org>
CC: Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>
CC: Ingo Molnar <mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
CC: "H. Peter Anvin" <hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
CC: Andrea Parri <parri.andrea-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
CC: Russell King <linux-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org>
CC: Greg Hackmann <ghackmann-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
CC: Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org>
CC: David Sehr <sehr-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
CC: x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org
CC: linux-arch-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
arch/arm64/Kconfig | 1 +
arch/arm64/kernel/entry.S | 4 ++++
2 files changed, 5 insertions(+)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index c9a7e9e1414f..5b0c06d8dbbe 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -16,6 +16,7 @@ config ARM64
select ARCH_HAS_GCOV_PROFILE_ALL
select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA
select ARCH_HAS_KCOV
+ select ARCH_HAS_MEMBARRIER_SYNC_CORE
select ARCH_HAS_SET_MEMORY
select ARCH_HAS_SG_CHAIN
select ARCH_HAS_STRICT_KERNEL_RWX
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S
index 6d14b8f29b5f..5edde1c2e93e 100644
--- a/arch/arm64/kernel/entry.S
+++ b/arch/arm64/kernel/entry.S
@@ -302,6 +302,10 @@ alternative_else_nop_endif
ldp x28, x29, [sp, #16 * 14]
ldr lr, [sp, #S_LR]
add sp, sp, #S_FRAME_SIZE // restore sp
+ /*
+ * ARCH_HAS_MEMBARRIER_SYNC_CORE rely on eret context synchronization
+ * when returning from IPI handler, and when returning to user-space.
+ */
eret // return to kernel
.endm
--
2.11.0
WARNING: multiple messages have this Message-ID (diff)
From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
To: Ingo Molnar <mingo@redhat.com>, Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org, linux-api@vger.kernel.org,
Andy Lutomirski <luto@kernel.org>,
"Paul E . McKenney" <paulmck@linux.vnet.ibm.com>,
Boqun Feng <boqun.feng@gmail.com>, Andrew Hunter <ahh@google.com>,
Maged Michael <maged.michael@gmail.com>,
Avi Kivity <avi@scylladb.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
Dave Watson <davejwatson@fb.com>,
Thomas Gleixner <tglx@linutronix.de>,
"H . Peter Anvin" <hpa@zytor.com>,
Andrea Parri <parri.andrea@gmail.com>,
Russell King <linux@armlinux.org.uk>,
Greg Hackmann <ghackmann@google.com>,
Will Deacon <will.deacon@arm.com>, David Sehr <sehr@google.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
x86@kernel.org,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
linux-arch@vger.kernel.org
Subject: [PATCH for 4.16 10/11] membarrier: arm64: Provide core serializing command
Date: Wed, 10 Jan 2018 10:46:24 -0500 [thread overview]
Message-ID: <20180110154625.4319-11-mathieu.desnoyers@efficios.com> (raw)
Message-ID: <20180110154624.G9RWrf3MnWWbWuRw2E85hvL9GhfA9AyFmyWpugrtefo@z> (raw)
In-Reply-To: <20180110154625.4319-1-mathieu.desnoyers@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
CC: Peter Zijlstra <peterz@infradead.org>
CC: Andy Lutomirski <luto@kernel.org>
CC: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
CC: Boqun Feng <boqun.feng@gmail.com>
CC: Andrew Hunter <ahh@google.com>
CC: Maged Michael <maged.michael@gmail.com>
CC: Avi Kivity <avi@scylladb.com>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Paul Mackerras <paulus@samba.org>
CC: Michael Ellerman <mpe@ellerman.id.au>
CC: Dave Watson <davejwatson@fb.com>
CC: Thomas Gleixner <tglx@linutronix.de>
CC: Ingo Molnar <mingo@redhat.com>
CC: "H. Peter Anvin" <hpa@zytor.com>
CC: Andrea Parri <parri.andrea@gmail.com>
CC: Russell King <linux@armlinux.org.uk>
CC: Greg Hackmann <ghackmann@google.com>
CC: Will Deacon <will.deacon@arm.com>
CC: David Sehr <sehr@google.com>
CC: x86@kernel.org
CC: linux-arch@vger.kernel.org
---
arch/arm64/Kconfig | 1 +
arch/arm64/kernel/entry.S | 4 ++++
2 files changed, 5 insertions(+)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index c9a7e9e1414f..5b0c06d8dbbe 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -16,6 +16,7 @@ config ARM64
select ARCH_HAS_GCOV_PROFILE_ALL
select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA
select ARCH_HAS_KCOV
+ select ARCH_HAS_MEMBARRIER_SYNC_CORE
select ARCH_HAS_SET_MEMORY
select ARCH_HAS_SG_CHAIN
select ARCH_HAS_STRICT_KERNEL_RWX
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S
index 6d14b8f29b5f..5edde1c2e93e 100644
--- a/arch/arm64/kernel/entry.S
+++ b/arch/arm64/kernel/entry.S
@@ -302,6 +302,10 @@ alternative_else_nop_endif
ldp x28, x29, [sp, #16 * 14]
ldr lr, [sp, #S_LR]
add sp, sp, #S_FRAME_SIZE // restore sp
+ /*
+ * ARCH_HAS_MEMBARRIER_SYNC_CORE rely on eret context synchronization
+ * when returning from IPI handler, and when returning to user-space.
+ */
eret // return to kernel
.endm
--
2.11.0
next prev parent reply other threads:[~2018-01-10 15:46 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20180110154625.4319-1-mathieu.desnoyers@efficios.com>
2018-01-10 15:46 ` [PATCH v2 for 4.16 02/11] membarrier: selftest: Test private expedited cmd Mathieu Desnoyers
2018-01-10 15:46 ` Mathieu Desnoyers
2018-01-10 15:46 ` [PATCH v7 for 4.16 03/11] powerpc: membarrier: Skip memory barrier in switch_mm() Mathieu Desnoyers
2018-01-10 15:46 ` Mathieu Desnoyers
2018-01-10 15:46 ` [PATCH v2 for 4.16 08/11] x86: Introduce sync_core_before_usermode Mathieu Desnoyers
2018-01-10 15:46 ` Mathieu Desnoyers
2018-01-10 15:46 ` [PATCH v3 for 4.16 09/11] membarrier: x86: Provide core serializing command Mathieu Desnoyers
2018-01-10 15:46 ` Mathieu Desnoyers
[not found] ` <20180110154625.4319-1-mathieu.desnoyers-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
2018-01-10 15:46 ` [PATCH for 4.16 06/11] membarrier: selftest: Test shared expedited cmd Mathieu Desnoyers
2018-01-10 15:46 ` Mathieu Desnoyers
2018-01-10 15:46 ` [PATCH for 4.16 07/11] membarrier: Provide core serializing command Mathieu Desnoyers
2018-01-10 15:46 ` Mathieu Desnoyers
2018-01-10 15:46 ` Mathieu Desnoyers [this message]
2018-01-10 15:46 ` [PATCH for 4.16 10/11] membarrier: arm64: " Mathieu Desnoyers
2018-01-10 15:46 ` [PATCH for 4.16 11/11] membarrier: selftest: Test private expedited sync core cmd Mathieu Desnoyers
2018-01-10 15:46 ` Mathieu Desnoyers
[not found] <20180117165458.13330-1-mathieu.desnoyers@efficios.com>
2018-01-17 16:54 ` [PATCH for 4.16 10/11] membarrier: arm64: Provide core serializing command Mathieu Desnoyers
2018-01-17 16:54 ` Mathieu Desnoyers
[not found] <20180129202020.8515-1-mathieu.desnoyers@efficios.com>
2018-01-29 20:20 ` Mathieu Desnoyers
2018-01-29 20:20 ` Mathieu Desnoyers
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