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=-7.1 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS 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 A7541C433EB for ; Wed, 22 Jul 2020 22:13:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8416D22B3F for ; Wed, 22 Jul 2020 22:13:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="o6lsUBKS"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="YgduB5QL" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733167AbgGVWLj (ORCPT ); Wed, 22 Jul 2020 18:11:39 -0400 Received: from Galois.linutronix.de ([193.142.43.55]:52622 "EHLO galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733138AbgGVWLf (ORCPT ); Wed, 22 Jul 2020 18:11:35 -0400 Message-Id: <20200722220520.258511584@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1595455893; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=A3JiScAV66HloAWwCQ/sFgNPUnLZ+Banxe8R954+Z5E=; b=o6lsUBKSZPYc2rvxUOLw2pilcUiJE4kHSEJZzcE+/7rTXXlZSEdrhduMwxmKfvnNh9CIZj CDAg/7YOhD3C6KPnUh2GRPFgPr2dVoHrBlqaEc/g92Lpg8FmiiPmjL8g9h9vRLQ1MgIjVl NiSabKledFo9NRv7xXwO2orGYPA5WP/cspVbi/Iut0vKEKY6g/A6vjZ/oETASg6AW1AHeS 4uqr5+baoATnRRGJov8wg3k88syekJaGfk1aEJMkhb/85Qp7PTeX1aflWYo1/NFF/HX+3E DYD9z9Pwi4G6GgucVA/R2ZJZvPIqPF8DFgFLJ9ZZFuc4GQWbdqSnoFCwaxR3GQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1595455893; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=A3JiScAV66HloAWwCQ/sFgNPUnLZ+Banxe8R954+Z5E=; b=YgduB5QLNoWSoIxGc11a1PbzCW0AkWC1WRywZ7E6SEEiV5WXxe0yWHaF+yE9NVgCanmkoR kAK6LqtIGtEuglBQ== Date: Thu, 23 Jul 2020 00:00:03 +0200 From: Thomas Gleixner To: LKML Cc: x86@kernel.org, linux-arch@vger.kernel.org, Will Deacon , Arnd Bergmann , Mark Rutland , Kees Cook , Keno Fischer , Paolo Bonzini , kvm@vger.kernel.org, Gabriel Krisman Bertazi , Sean Christopherson Subject: [patch V5 09/15] x86/ptrace: Provide pt_regs helper for entry/exit References: <20200722215954.464281930@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-transfer-encoding: 8-bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Thomas Gleixner As a preparatory step for moving the syscall and interrupt entry/exit handling into generic code, provide a pt_regs helper which retrieves the interrupt state from pt_regs. This is required to check whether interrupts are reenabled by return from interrupt/exception. Signed-off-by: Thomas Gleixner Reviewed-by: Kees Cook --- V4: Remove the syscall nr and return value helpers as they alredy exist --- arch/x86/include/asm/ptrace.h | 5 +++++ 1 file changed, 5 insertions(+) --- a/arch/x86/include/asm/ptrace.h +++ b/arch/x86/include/asm/ptrace.h @@ -209,6 +209,11 @@ static inline void user_stack_pointer_se regs->sp = val; } +static __always_inline bool regs_irqs_disabled(struct pt_regs *regs) +{ + return !(regs->flags & X86_EFLAGS_IF); +} + /* Query offset/name of register from its name/offset */ extern int regs_query_register_offset(const char *name); extern const char *regs_query_register_name(unsigned int offset);