From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-14.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9026CC433E6 for ; Mon, 18 Jan 2021 06:21:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6AFA3225AC for ; Mon, 18 Jan 2021 06:21:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731691AbhARGVe (ORCPT ); Mon, 18 Jan 2021 01:21:34 -0500 Received: from mail.kernel.org ([198.145.29.99]:54282 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725860AbhARGVX (ORCPT ); Mon, 18 Jan 2021 01:21:23 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 6EA9922513; Mon, 18 Jan 2021 06:20:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1610950843; bh=24hfdJRWZcqPyS24ESJ7iEzXUdt5YM+29ZgucCMPL7o=; h=From:To:Cc:Subject:Date:From; b=W/QPVTZ2vFs86y6/yPOc0+d2EHDWg+hJLyovMkNWqysIBrRta8PRdzl5zO4URQ/2L jTSbFuW6Q22WJU8iDLM1mXnklomiTNHdFxPZDKyE4BK46qwkp9rvGEDTvAFC1Qxx7X 6MC/mY+sXN77YFQ6Cg1zdYKPXbpa80NTrGE6c5WYLl4f9esx0jjw3K0OzZHyoP9XqD J1yzmEHBk2G+KyhWjV6VgM10zlvE85zWM+geSPTz/+GcBMQXkjuVfcCICn+7PnkEGv wDf0qQjYnl+YkCNO2tHE1rQhRKpB8j9uCkbasAnOnW5Pu31DZVXfZjErHoYY1WTDSA VH3IMj01zd4MQ== From: Andy Lutomirski To: x86@kernel.org Cc: LKML , Krzysztof Mazur , =?UTF-8?q?Krzysztof=20Ol=C4=99dzki?= , Arnd Bergmann , Andy Lutomirski Subject: [PATCH 0/4] x86/fpu: Reduce unnecessary FNINIT and MXCSR usage Date: Sun, 17 Jan 2021 22:20:37 -0800 Message-Id: X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This series fixes two regressions: a boot failure on AMD K7 and a performance regression on everything. I did a double-take here -- the regressions were reported by different people, both named Krzysztof :) Andy Lutomirski (4): x86/fpu: Add kernel_fpu_begin_mask() to selectively initialize state x86/mmx: Use KFPU_MMX for MMX string operations x86/fpu: Make the EFI FPU calling convention explicit x86/fpu/64: Don't FNINIT in kernel_fpu_begin() arch/x86/include/asm/efi.h | 4 ++-- arch/x86/include/asm/fpu/api.h | 35 ++++++++++++++++++++++++++++++++-- arch/x86/kernel/fpu/core.c | 17 +++++++++++------ arch/x86/lib/mmx_32.c | 10 +++++----- arch/x86/platform/efi/efi_64.c | 2 +- 5 files changed, 52 insertions(+), 16 deletions(-) -- 2.29.2