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=-8.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS 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 0102FC432BE for ; Fri, 27 Aug 2021 13:22:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DC6E760F91 for ; Fri, 27 Aug 2021 13:22:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245422AbhH0NXl (ORCPT ); Fri, 27 Aug 2021 09:23:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33132 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245269AbhH0NXZ (ORCPT ); Fri, 27 Aug 2021 09:23:25 -0400 Received: from ozlabs.org (bilbo.ozlabs.org [IPv6:2401:3900:2:1::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 68C88C061757 for ; Fri, 27 Aug 2021 06:22:21 -0700 (PDT) Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 4Gx0kK4Nzfz9sWc; Fri, 27 Aug 2021 23:22:17 +1000 (AEST) From: Michael Ellerman To: Christophe Leroy , Paul Mackerras , Benjamin Herrenschmidt , Michael Ellerman , npiggin@gmail.com Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org In-Reply-To: <385ead49ccb66a259b25fee3eebf0bd4094068f3.1629707037.git.christophe.leroy@csgroup.eu> References: <385ead49ccb66a259b25fee3eebf0bd4094068f3.1629707037.git.christophe.leroy@csgroup.eu> Subject: Re: (subset) [PATCH v3 1/3] powerpc: Remove MSR_PR check in interrupt_exit_{user/kernel}_prepare() Message-Id: <163007018206.52768.16263402363741709388.b4-ty@ellerman.id.au> Date: Fri, 27 Aug 2021 23:16:22 +1000 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 On Mon, 23 Aug 2021 08:24:20 +0000 (UTC), Christophe Leroy wrote: > In those hot functions that are called at every interrupt, any saved > cycle is worth it. > > interrupt_exit_user_prepare() and interrupt_exit_kernel_prepare() are > called from three places: > - From entry_32.S > - From interrupt_64.S > - From interrupt_exit_user_restart() and interrupt_exit_kernel_restart() > > [...] Applied to powerpc/next. [2/3] powerpc: Refactor verification of MSR_RI https://git.kernel.org/powerpc/c/806c0e6e7e97adc17389c8dc1f52d4736f49299b cheers