From patchwork Fri Apr 26 14:37:37 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Julien Grall X-Patchwork-Id: 10919239 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B3905912 for ; Fri, 26 Apr 2019 14:38:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9A5F528BF0 for ; Fri, 26 Apr 2019 14:38:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 89A4F28C35; Fri, 26 Apr 2019 14:38:01 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 3510528BF0 for ; Fri, 26 Apr 2019 14:38:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Owner; bh=o0/++PFNycsxOAgSCg1NUdYtOjdiv+iHV/WXt1ft1Cg=; b=iru pzt86NXmKf55cnT66v3/92nBGAOuXbSEJErWbu7+jmoPlOYeBRZw0xcdCaj6VppacngjoscK3LdC9 CDrQ61+3tR+B+aOn1SoPs2e5iRC7RczcEHgPYPPA2vX0nS3SJ8ILMOcJZCk7l7tmlSse1fNdbXUqe 4giRagQMaLORIGla9f6E1kz6Uf1L2W38eYrkW+uZsx6PlP17BuYCIJeGIf47cboidtw5Bny5OybWe aA0ohYN18ZPpcXoj8GmTv3XYJelNRR7DoFWMwMYcG4tT7zg4Qar6zNP1clFArXUBoHzS06HDpi77s TT6f9RGnmOYslnHDdE7F4qvkZKDTJyA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hK1zA-0005G6-P0; Fri, 26 Apr 2019 14:37:56 +0000 Received: from foss.arm.com ([217.140.101.70]) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hK1z7-0005Et-Ar for linux-arm-kernel@lists.infradead.org; Fri, 26 Apr 2019 14:37:54 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 71E1E80D; Fri, 26 Apr 2019 07:37:50 -0700 (PDT) Received: from e108454-lin.cambridge.arm.com (e108454-lin.cambridge.arm.com [10.1.196.50]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 4779F3F5C1; Fri, 26 Apr 2019 07:37:48 -0700 (PDT) From: Julien Grall To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v4 0/3] arm64/fpsimd: Don't disable softirq when touching FPSIMD/SVE state Date: Fri, 26 Apr 2019 15:37:37 +0100 Message-Id: <20190426143740.31973-1-julien.grall@arm.com> X-Mailer: git-send-email 2.11.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190426_073753_381221_C499017C X-CRM114-Status: UNSURE ( 9.32 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: ard.biesheuvel@linaro.org, julien.thierry@arm.com, marc.zyngier@arm.com, catalin.marinas@arm.com, suzuki.poulose@arm.com, will.deacon@arm.com, christoffer.dall@arm.com, Julien Grall , james.morse@arm.com, Dave.Martin@arm.com MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Hi all, This patch series keeps softirqs enabled while touching FPSIMD/SVE state. For more details on the impact see patch #3. This patch series has been benchmarked on Linux 5.1-rc4 with defconfig. On Juno2: * hackbench 100 process 1000 (10 times) * .7% quicker On ThunderX 2: * hackbench 1000 process 1000 (20 times) * 3.4% quicker Note that while the benchmark has been done on 5.1-rc4, the patch series is based on kvm-arm/next as it has few conflicts with the SVE KVM series. Cheers, Julien Grall (3): arm64/fpsimd: Remove the prototype for sve_flush_cpu_state() arch/arm64: fpsimd: Introduce fpsimd_save_and_flush_cpu_state() and use it arm64/fpsimd: Don't disable softirq when touching FPSIMD/SVE state arch/arm64/include/asm/fpsimd.h | 5 +- arch/arm64/include/asm/simd.h | 10 +-- arch/arm64/kernel/fpsimd.c | 139 +++++++++++++++++++++++++++------------- arch/arm64/kvm/fpsimd.c | 4 +- 4 files changed, 103 insertions(+), 55 deletions(-)