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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3F219EB64DC for ; Tue, 18 Jul 2023 13:45:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232813AbjGRNpC (ORCPT ); Tue, 18 Jul 2023 09:45:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45274 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231169AbjGRNo6 (ORCPT ); Tue, 18 Jul 2023 09:44:58 -0400 Received: from mail-oo1-xc36.google.com (mail-oo1-xc36.google.com [IPv6:2607:f8b0:4864:20::c36]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5602AD1 for ; Tue, 18 Jul 2023 06:44:57 -0700 (PDT) Received: by mail-oo1-xc36.google.com with SMTP id 006d021491bc7-5636ab8240cso2567126eaf.3 for ; Tue, 18 Jul 2023 06:44:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1689687896; x=1692279896; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=eNqrcefTGIxwq6WUc5Q+gfSwa7IlQJweTMgnmniqqFE=; b=Koy26GCejGQAfIzaqEa11hB0ewXfx03a10NzSX2RR2pNaVFziQMZLgnIHfFgJM6fjK naszPDhFJkp/FeI0Cik9m32MLPtUVSpahn5Rx0+J8OMROkky+HLsSpiOY2D7j+A9hXJJ HIAi+1we2JUilgoopmK9fac3mMPmjI+hJ9TU7h2XiR/4T1zS2j60Fcjo7CPyLFr1DhhA AKDGnRMOsb7FSNFo9J/ZnfjrwwfjsgXgAzs1m3uUuCcAZ/MXfZashEkt47f1NnBfaNdT fS1yvfk1BNWxqglYJljmkWYtm/3t5bKe5KcY7vBtEqMuJR/1pc/hLSNsVjVBA5kSpkB7 hMiQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689687896; x=1692279896; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=eNqrcefTGIxwq6WUc5Q+gfSwa7IlQJweTMgnmniqqFE=; b=VztEeaUZIfbGekZPd7S6EU5Z7EY4DzsqsLVA1amN67mRsW9W6uHYA1nPnowVpUfCGl N/C/dW/ZqXVdyj+lg2rHjvzZfa84jInNwDP4AuGmUmXIOy+gT1bfq922sHhlMqpukmLY l5BSphM+RP4K8fCQKnKtycFrKNRO8aptVR+Umei4EYJEXhYhflOhHYn7sNECHPQ54Tc4 /b29DihTLyaeoqwpE4tWXVoNBci9MYpeqjEUvCFHXdCEmFu61CITFOkgky4Y3yYepGL5 HWAqXpGOv/LcFsmdotjOYQqQPf709AT2OMiCcIsSX0ysT/Rd+GG4ZL/pUFTTon5aYakk NY7A== X-Gm-Message-State: ABy/qLaTND/5dDW0bQJ88GwrRaBQ/QwwIedlw3h4hWj10hrgOAZvJ5PX 4p/2d93oHMA21BgeCKMZHwGO+E4LvQ== X-Google-Smtp-Source: APBJJlFBDFSu2ijYBnRo4B/pD1gmfEQxbNlfcEXoehGoRgTekp+XivX6/MdM2Ulp8XkijcL7brWGqA== X-Received: by 2002:a4a:2744:0:b0:566:fd3b:4329 with SMTP id w4-20020a4a2744000000b00566fd3b4329mr5432827oow.7.1689687895893; Tue, 18 Jul 2023 06:44:55 -0700 (PDT) Received: from citadel.. (047-026-243-217.res.spectrum.com. [47.26.243.217]) by smtp.gmail.com with ESMTPSA id q7-20020a4aac47000000b005660ed0becesm726778oon.39.2023.07.18.06.44.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 18 Jul 2023 06:44:54 -0700 (PDT) From: Brian Gerst To: linux-kernel@vger.kernel.org, x86@kernel.org Cc: Thomas Gleixner , Borislav Petkov , "H . Peter Anvin" , Andy Lutomirski , Brian Gerst Subject: [PATCH 0/6] x86: Clean up fast syscall return validation Date: Tue, 18 Jul 2023 09:44:40 -0400 Message-ID: <20230718134446.168654-1-brgerst@gmail.com> X-Mailer: git-send-email 2.41.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch set cleans up the tests done to determine if a fast syscall return instruction can be used to return to userspace. It converts the code to C, and refactors existing code to be more readable. Brian Gerst (6): x86/entry/64: Remove obsolete comment on tracing vs. SYSRET x86/entry/64: Convert SYSRET validation tests to C x86/entry/compat: Combine return value test from syscall handler x86/entry/32: Convert do_fast_syscall_32() to bool return type x86/entry/32: Remove SEP test for SYSEXIT x86/entry/32: Clean up syscall fast exit tests arch/x86/entry/common.c | 109 +++++++++++++++++++++---------- arch/x86/entry/entry_32.S | 2 +- arch/x86/entry/entry_64.S | 68 +------------------ arch/x86/entry/entry_64_compat.S | 12 ++-- arch/x86/include/asm/syscall.h | 6 +- 5 files changed, 87 insertions(+), 110 deletions(-) -- 2.41.0