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: 162920 Delivered-To: patch@linaro.org Received: by 2002:a02:c6d8:0:0:0:0:0 with SMTP id r24csp827753jan; Fri, 26 Apr 2019 07:37:52 -0700 (PDT) X-Google-Smtp-Source: APXvYqwUOOWZWqm6Usqv+8EkBaMnhKzgp4q2O47esa9BoQft4d7cqytw8TMq685b02SpLOx2szGa X-Received: by 2002:a63:e304:: with SMTP id f4mr43839870pgh.374.1556289472590; Fri, 26 Apr 2019 07:37:52 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1556289472; cv=none; d=google.com; s=arc-20160816; b=ubXTRRbX+21akx/gfReSccC5l9Najj8jng9QkPp8eU1ncT/qxjKe1aofkBjVUlaqay mQ6u9Fxbva5C+CjUq7Vnd8oku6kRfghEVFbfooPABMmHqP9+VDgUCKMJvr98kaWset8N W8alJRB3jm0XPw+D6SwlLEuVWEVvDdzDYpdNdCxGzbaZpmJnlnJL9A1lT/RB26OgQkFq rqv9w8rAHcpQ0fPTF4w1M2xksaYwdxfuWcygDU/k0V1NRAjRKx3dReE638atkGIa7MM6 SaAJxYN6otoeH5t/AzR37RJJAqxoN8m7o6lCDODLDAGk58GiJkT06WDdE8tsgJ7L+fO8 PXMQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:message-id:date:subject:cc:to:from; bh=tS6HO+djsUmQxtCHxIhtEOOi4SE2iIzyyW5Fvjwj87M=; b=C5HdRfmwKDRGptAdEGP/72Xrc4Bfo5aZoXxL5U7WmvvqtREKu2AQ7nfuwutKuCcSZ2 rx613FAPBTWvk09WLyYXr6cs7W3mXq2PI8AixLN9xcu96g6sUBwVTWyx2N7GTxVdAw2j dt1lpni/C5qzAX3yXa0L9XEQl4GNynZ7DvznLvs+zoA8dzO1/lgJlWZV4AFKlD8VwEbN WRIeerLB1pBZABTnBUggWPddEElAC3qzEoyRgKIO4KYS4hKuIPegQVF5V6gNi+9cHosJ hz7EkxfHTyFaroScqP4he6/2Ij41pQ3ru6kGmJe/Ot7LQj+F0IZxP5Mv/whyaQc2RK6r YzGA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id w2si6996012plp.26.2019.04.26.07.37.52; Fri, 26 Apr 2019 07:37:52 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726253AbfDZOhv (ORCPT + 30 others); Fri, 26 Apr 2019 10:37:51 -0400 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:43062 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726060AbfDZOhu (ORCPT ); Fri, 26 Apr 2019 10:37:50 -0400 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 Cc: catalin.marinas@arm.com, will.deacon@arm.com, christoffer.dall@arm.com, marc.zyngier@arm.com, james.morse@arm.com, julien.thierry@arm.com, suzuki.poulose@arm.com, Dave.Martin@arm.com, ard.biesheuvel@linaro.org, Julien Grall 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 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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(-) -- 2.11.0