From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-4056489-1516723158-2-12525896298538123971 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.25, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES ensvda, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='US', FromHeader='com', MailFrom='org' X-Spam-charsets: X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: linux-api-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1516723157; b=r3qriOnTvLpRMOdLMW2nGrruBvRMotAej1rwJct6cR5g+GO btsvVIpy4/Jpxq1nbHgo3r6Nkp28v6XkkuG3vCmz2iBF7LnTn90mdkSEQAbhp97J DqsKTLeI6fPMpUDQPn6k7DSQiKPU01rnOVODgbUZ55iQNdYACgSQoZ+qetZ8AI6i bTNzPlyDKyX8C3lpt+0BDwBlT+e62xvnXsgxScowvK6h8Mt/eSMfbKKQ0skwozLY QCnITp3SOpLQYsWw0b7R0EJH9CGnaWN2jCm2YEELzZsKylZbRZrT9x8N9u62Fep6 LIWn+6TQWn0BNtJZaWEkQ5qZUYe00mJHgzKa6Ag== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=from:to:cc:subject:date:message-id :in-reply-to:references:sender:list-id; s=arctest; t=1516723157; bh=7FJKUhmaQPtH+9YbNAu1/t/kInOxn8I+71YVfqx9gdE=; b=it3GWx4GoS6t c4IDf0a2L4ynbbZFG4O3qJNAIPO8gWVmPzRKrhZg4UF/1xXo3Tsi+1YuoVSJnuGR Mw+UAeSB/A4v3ubyRIXaau/T3Uqh7ksZYRdJJ/9MMnJLNTAvoTIfcvdlIegewB1n T6FxviLzakcbUfrbrv3kR1Wa1FzvWka4N9Npt+wj+Kh8ri0Odvjxb1jsIyAqqBWG qhyK5FAqlerIzLxDIYMKfr4vOGObUUk3/+vni+EPYdoR0B0J9pA8MP+G5jTRe8no 91k0JLSJdR/PByqRHoNawhvR3eNAxBPveVfpOp0MjkMfIgGbjFLaVduhcblOAQPi Hq816h4OXw== ARC-Authentication-Results: i=1; mx5.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=efficios.com; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=linux-api-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=efficios.com header.result=pass header_is_org_domain=yes Authentication-Results: mx5.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=efficios.com; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=linux-api-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=efficios.com header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751847AbeAWP6N (ORCPT ); Tue, 23 Jan 2018 10:58:13 -0500 Received: from mail.efficios.com ([167.114.142.141]:34782 "EHLO mail.efficios.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752321AbeAWP6L (ORCPT ); Tue, 23 Jan 2018 10:58:11 -0500 From: Mathieu Desnoyers To: Ingo Molnar , Peter Zijlstra , Thomas Gleixner Cc: linux-kernel@vger.kernel.org, linux-api@vger.kernel.org, Andy Lutomirski , "Paul E . McKenney" , Boqun Feng , Andrew Hunter , Maged Michael , Avi Kivity , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Dave Watson , "H . Peter Anvin" , Andrea Parri , Russell King , Greg Hackmann , Will Deacon , David Sehr , Linus Torvalds , x86@kernel.org, Mathieu Desnoyers , linux-arch@vger.kernel.org Subject: [PATCH 10/11] membarrier: arm64: Provide core serializing command Date: Tue, 23 Jan 2018 10:57:32 -0500 Message-Id: <20180123155733.3404-11-mathieu.desnoyers@efficios.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20180123155733.3404-1-mathieu.desnoyers@efficios.com> References: <20180123155733.3404-1-mathieu.desnoyers@efficios.com> Sender: linux-api-owner@vger.kernel.org X-Mailing-List: linux-api@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: Signed-off-by: Mathieu Desnoyers CC: Peter Zijlstra CC: Andy Lutomirski CC: Paul E. McKenney CC: Boqun Feng CC: Andrew Hunter CC: Maged Michael CC: Avi Kivity CC: Benjamin Herrenschmidt CC: Paul Mackerras CC: Michael Ellerman CC: Dave Watson CC: Thomas Gleixner CC: Ingo Molnar CC: "H. Peter Anvin" CC: Andrea Parri CC: Russell King CC: Greg Hackmann CC: Will Deacon CC: David Sehr 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