From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752239AbeBEVoD (ORCPT ); Mon, 5 Feb 2018 16:44:03 -0500 Received: from terminus.zytor.com ([65.50.211.136]:46529 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752021AbeBEVn4 (ORCPT ); Mon, 5 Feb 2018 16:43:56 -0500 Date: Mon, 5 Feb 2018 13:30:00 -0800 From: tip-bot for Mathieu Desnoyers Message-ID: Cc: sehr@google.com, avi@scylladb.com, linux@armlinux.org.uk, peterz@infradead.org, parri.andrea@gmail.com, hpa@zytor.com, mpe@ellerman.id.au, benh@kernel.crashing.org, boqun.feng@gmail.com, davejwatson@fb.com, torvalds@linux-foundation.org, mingo@kernel.org, mathieu.desnoyers@efficios.com, will.deacon@arm.com, ghackmann@google.com, paulmck@linux.vnet.ibm.com, linux-kernel@vger.kernel.org, maged.michael@gmail.com, ahh@google.com, tglx@linutronix.de, paulus@samba.org, luto@kernel.org Reply-To: mathieu.desnoyers@efficios.com, torvalds@linux-foundation.org, mingo@kernel.org, ahh@google.com, linux-kernel@vger.kernel.org, maged.michael@gmail.com, paulmck@linux.vnet.ibm.com, ghackmann@google.com, will.deacon@arm.com, tglx@linutronix.de, paulus@samba.org, luto@kernel.org, parri.andrea@gmail.com, peterz@infradead.org, linux@armlinux.org.uk, avi@scylladb.com, sehr@google.com, mpe@ellerman.id.au, hpa@zytor.com, benh@kernel.crashing.org, davejwatson@fb.com, boqun.feng@gmail.com In-Reply-To: <20180129202020.8515-11-mathieu.desnoyers@efficios.com> References: <20180129202020.8515-11-mathieu.desnoyers@efficios.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:sched/urgent] membarrier/arm64: Provide core serializing command Git-Commit-ID: f1e3a12b6543a73cfd47aa7da16d3d73d297795e X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: f1e3a12b6543a73cfd47aa7da16d3d73d297795e Gitweb: https://git.kernel.org/tip/f1e3a12b6543a73cfd47aa7da16d3d73d297795e Author: Mathieu Desnoyers AuthorDate: Mon, 29 Jan 2018 15:20:19 -0500 Committer: Ingo Molnar CommitDate: Mon, 5 Feb 2018 21:35:17 +0100 membarrier/arm64: Provide core serializing command Signed-off-by: Mathieu Desnoyers Acked-by: Thomas Gleixner Acked-by: Peter Zijlstra (Intel) Cc: Andrea Parri Cc: Andrew Hunter Cc: Andy Lutomirski Cc: Avi Kivity Cc: Benjamin Herrenschmidt Cc: Boqun Feng Cc: Dave Watson Cc: David Sehr Cc: Greg Hackmann Cc: H. Peter Anvin Cc: Linus Torvalds Cc: Maged Michael Cc: Michael Ellerman Cc: Paul E. McKenney Cc: Paul Mackerras Cc: Russell King Cc: Will Deacon Cc: linux-api@vger.kernel.org Cc: linux-arch@vger.kernel.org Link: http://lkml.kernel.org/r/20180129202020.8515-11-mathieu.desnoyers@efficios.com Signed-off-by: Ingo Molnar --- 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 c9a7e9e..5b0c06d 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 6d14b8f..5edde1c 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