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=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 3F76DC4BA06 for ; Tue, 25 Feb 2020 23:30:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1053D24680 for ; Tue, 25 Feb 2020 23:30:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730570AbgBYXaT (ORCPT ); Tue, 25 Feb 2020 18:30:19 -0500 Received: from Galois.linutronix.de ([193.142.43.55]:55566 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729602AbgBYXZy (ORCPT ); Tue, 25 Feb 2020 18:25:54 -0500 Received: from p5de0bf0b.dip0.t-ipconnect.de ([93.224.191.11] helo=nanos.tec.linutronix.de) by Galois.linutronix.de with esmtpsa (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1j6ja3-0004Yi-RD; Wed, 26 Feb 2020 00:25:36 +0100 Received: from nanos.tec.linutronix.de (localhost [IPv6:::1]) by nanos.tec.linutronix.de (Postfix) with ESMTP id 5B104101226; Wed, 26 Feb 2020 00:25:32 +0100 (CET) Message-Id: <20200225221305.295289073@linutronix.de> User-Agent: quilt/0.65 Date: Tue, 25 Feb 2020 23:08:02 +0100 From: Thomas Gleixner To: LKML Cc: x86@kernel.org, Steven Rostedt , Brian Gerst , Juergen Gross , Paolo Bonzini , Arnd Bergmann Subject: [patch 1/8] x86/entry/64: Trace irqflags unconditionally on when returing to user space References: <20200225220801.571835584@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org User space cannot longer disable interrupts so trace return to user space unconditionally as IRQS_ON. Signed-off-by: Thomas Gleixner --- arch/x86/entry/entry_64.S | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -174,7 +174,7 @@ SYM_INNER_LABEL(entry_SYSCALL_64_after_h movq %rsp, %rsi call do_syscall_64 /* returns with IRQs disabled */ - TRACE_IRQS_IRETQ /* we're about to change IF */ + TRACE_IRQS_ON /* return enables interrupts */ /* * Try to use SYSRET instead of IRET if we're returning to @@ -619,7 +619,7 @@ SYM_CODE_START_LOCAL(common_interrupt) .Lretint_user: mov %rsp,%rdi call prepare_exit_to_usermode - TRACE_IRQS_IRETQ + TRACE_IRQS_ON SYM_INNER_LABEL(swapgs_restore_regs_and_return_to_usermode, SYM_L_GLOBAL) #ifdef CONFIG_DEBUG_ENTRY