{"id":808335,"url":"http://patchwork.ozlabs.org/api/1.0/patches/808335/?format=json","project":{"id":19,"url":"http://patchwork.ozlabs.org/api/1.0/projects/19/?format=json","name":"Linux IMX development","link_name":"linux-imx","list_id":"linux-imx-kernel.lists.patchwork.ozlabs.org","list_email":"linux-imx-kernel@lists.patchwork.ozlabs.org","web_url":null,"scm_url":null,"webscm_url":null},"msgid":"<1504198860-12951-9-git-send-email-Dave.Martin@arm.com>","date":"2017-08-31T17:00:40","name":"[v2,08/28] arm64/sve: Kconfig update and conditional compilation support","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"42c8337c1e7de7d336dfcb750d923ee44b5e906b","submitter":{"id":26612,"url":"http://patchwork.ozlabs.org/api/1.0/people/26612/?format=json","name":"Dave Martin","email":"Dave.Martin@arm.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-imx/patch/1504198860-12951-9-git-send-email-Dave.Martin@arm.com/mbox/","series":[{"id":883,"url":"http://patchwork.ozlabs.org/api/1.0/series/883/?format=json","date":"2017-08-31T17:00:33","name":"ARM Scalable Vector Extension (SVE)","version":2,"mbox":"http://patchwork.ozlabs.org/series/883/mbox/"}],"check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/808335/checks/","tags":{},"headers":{"Return-Path":"","X-Original-To":"incoming-imx@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming-imx@bilbo.ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=lists.infradead.org\n\t(client-ip=65.50.211.133; helo=bombadil.infradead.org;\n\tenvelope-from=linux-arm-kernel-bounces+incoming-imx=patchwork.ozlabs.org@lists.infradead.org;\n\treceiver=)","ozlabs.org; dkim=pass (2048-bit key;\n\tunprotected) header.d=lists.infradead.org\n\theader.i=@lists.infradead.org\n\theader.b=\"aH4HG9BH\"; dkim-atps=neutral"],"Received":["from bombadil.infradead.org (bombadil.infradead.org\n\t[65.50.211.133])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256\n\tbits)) (No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3xjpcP5ZjLz9s81\n\tfor ;\n\tFri, 1 Sep 2017 03:03:49 +1000 (AEST)","from localhost ([127.0.0.1] helo=bombadil.infradead.org)\n\tby bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux))\n\tid 1dnSsb-0000Hx-Gv; Thu, 31 Aug 2017 17:03:45 +0000","from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]\n\thelo=foss.arm.com)\n\tby bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux))\n\tid 1dnSqo-0007H7-Ms for linux-arm-kernel@lists.infradead.org;\n\tThu, 31 Aug 2017 17:02:06 +0000","from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249])\n\tby usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 45841168F;\n\tThu, 31 Aug 2017 10:01:30 -0700 (PDT)","from e103592.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com\n\t[10.72.51.249])\n\tby usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id\n\t764313F58F; Thu, 31 Aug 2017 10:01:28 -0700 (PDT)"],"DKIM-Signature":"v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;\n\td=lists.infradead.org; s=bombadil.20170209; h=Sender:\n\tContent-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post:\n\tList-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:\n\tMessage-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description:\n\tResent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:\n\tList-Owner; bh=KxPl2MYeyQNyYvTRL0G5Oj6wwgblvm+1x2qBb/aiVP4=;\n\tb=aH4HG9BH4F4JKb\n\trYR7NmPEMKZIS3XqdE0gq4ezxTqNKDYpislCTK+8q/pWj3/fzKlvJ4temrYJGfwOossWRhz1bZJfF\n\t2qcja772L1nENioKZfhsyuGm+zHGfacIVutewCireuniccEPzv+hS104Lf2tu155K/HHUNgIyr8rS\n\tW5NbDkQ2EhzUE/1iYdq7oIM2Wps15jHAByifA+pyMH/V/tMHeYr6ceUOA9bMKbXfDzQX/03FakTd5\n\t4bwa/5mifDAu0hCOQ+XfDa6sUY6UG29495F48DYbyRDdIi+ZdZnbFFY3Z3jGwSlnsPCsiUG1bfCEn\n\tuYlLNVjsoxhvwInmVO4w==;","From":"Dave Martin ","To":"linux-arm-kernel@lists.infradead.org","Subject":"[PATCH v2 08/28] arm64/sve: Kconfig update and conditional\n\tcompilation support","Date":"Thu, 31 Aug 2017 18:00:40 +0100","Message-Id":"<1504198860-12951-9-git-send-email-Dave.Martin@arm.com>","X-Mailer":"git-send-email 2.1.4","In-Reply-To":"<1504198860-12951-1-git-send-email-Dave.Martin@arm.com>","References":"<1504198860-12951-1-git-send-email-Dave.Martin@arm.com>","MIME-Version":"1.0","X-CRM114-Version":"20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 ","X-CRM114-CacheID":"sfid-20170831_100155_352160_F50C1C8B ","X-CRM114-Status":"GOOD ( 10.13 )","X-Spam-Score":"-6.9 (------)","X-Spam-Report":"SpamAssassin version 3.4.1 on bombadil.infradead.org summary:\n\tContent analysis details: (-6.9 points)\n\tpts rule name description\n\t---- ----------------------\n\t--------------------------------------------------\n\t-5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at http://www.dnswl.org/,\n\thigh trust [217.140.101.70 listed in list.dnswl.org]\n\t-0.0 SPF_PASS SPF: sender matches SPF record\n\t-0.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay\n\tdomain\n\t-1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1%\n\t[score: 0.0000]","X-BeenThere":"linux-arm-kernel@lists.infradead.org","X-Mailman-Version":"2.1.21","Precedence":"list","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Cc":"linux-arch@vger.kernel.org, libc-alpha@sourceware.org, Ard Biesheuvel\n\t, Szabolcs Nagy ,\n\tCatalin Marinas\n\t, Will Deacon , Richard\n\tSandiford , =?utf-8?q?Alex_Benn=C3=A9e?=\n\t, kvmarm@lists.cs.columbia.edu","Content-Type":"text/plain; charset=\"utf-8\"","Content-Transfer-Encoding":"base64","Sender":"\"linux-arm-kernel\" ","Errors-To":"linux-arm-kernel-bounces+incoming-imx=patchwork.ozlabs.org@lists.infradead.org","List-Id":"linux-imx-kernel.lists.patchwork.ozlabs.org"},"content":"This patch adds CONFIG_ARM64_SVE to control building of SVE support\ninto the kernel, and adds a stub predicate system_supports_sve() to\ncontrol conditional compilation and runtime SVE support.\n\nsystem_supports_sve() just returns false for now: it will be\nreplaced with a non-trivial implementation in a later patch, once\nSVE support is complete enough to be enabled safely.\n\nSigned-off-by: Dave Martin \nReviewed-by: Alex Bennée \n---\n arch/arm64/Kconfig | 11 +++++++++++\n arch/arm64/include/asm/cpufeature.h | 5 +++++\n 2 files changed, 16 insertions(+)","diff":"diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig\nindex ca711ac..9b3a50e 100644\n--- a/arch/arm64/Kconfig\n+++ b/arch/arm64/Kconfig\n@@ -975,6 +975,17 @@ config ARM64_PMEM\n \n endmenu\n \n+config ARM64_SVE\n+\tbool \"ARM Scalable Vector Extension support\"\n+\tdefault y\n+\thelp\n+\t The Scalable Vector Extension (SVE) is an extension to the AArch64\n+\t execution state which complements and extends the SIMD functionality\n+\t of the base architecture to support much larger vectors and to enable\n+\t additional vectorisation opportunities.\n+\n+\t To enable use of this extension on CPUs that implement it, say Y.\n+\n config ARM64_MODULE_CMODEL_LARGE\n \tbool\n \ndiff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h\nindex 428ee1f..4ea3441 100644\n--- a/arch/arm64/include/asm/cpufeature.h\n+++ b/arch/arm64/include/asm/cpufeature.h\n@@ -262,6 +262,11 @@ static inline bool system_uses_ttbr0_pan(void)\n \t\t!cpus_have_const_cap(ARM64_HAS_PAN);\n }\n \n+static inline bool system_supports_sve(void)\n+{\n+\treturn false;\n+}\n+\n #endif /* __ASSEMBLY__ */\n \n #endif\n","prefixes":["v2","08/28"]}