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=-3.7 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 95B08C47257 for ; Tue, 5 May 2020 14:20:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 808DA20675 for ; Tue, 5 May 2020 14:20:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730223AbgEEOUt (ORCPT ); Tue, 5 May 2020 10:20:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48940 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1729269AbgEEOPe (ORCPT ); Tue, 5 May 2020 10:15:34 -0400 Received: from Galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3EF0DC061A0F for ; Tue, 5 May 2020 07:15:34 -0700 (PDT) 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 1jVyLs-0001WD-2N; Tue, 05 May 2020 16:15:16 +0200 Received: from nanos.tec.linutronix.de (localhost [IPv6:::1]) by nanos.tec.linutronix.de (Postfix) with ESMTP id 99DB7FFC8D; Tue, 5 May 2020 16:15:15 +0200 (CEST) Message-Id: <20200505134905.258989060@linutronix.de> User-Agent: quilt/0.65 Date: Tue, 05 May 2020 15:44:14 +0200 From: Thomas Gleixner To: LKML Cc: x86@kernel.org, "Paul E. McKenney" , Andy Lutomirski , Alexandre Chartre , Frederic Weisbecker , Paolo Bonzini , Sean Christopherson , Masami Hiramatsu , Petr Mladek , Steven Rostedt , Joel Fernandes , Boris Ostrovsky , Juergen Gross , Brian Gerst , Mathieu Desnoyers , Josh Poimboeuf , Will Deacon Subject: [patch V4 part 3 20/29] x86/entry: Provide IDTENTRY_ERRORCODE References: <20200505134354.774943181@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-transfer-encoding: 8-bit 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 From: Thomas Gleixner Same as IDTENTRY but the C entry point has an error code argument. Signed-off-by: Thomas Gleixner --- arch/x86/include/asm/idtentry.h | 46 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) --- a/arch/x86/include/asm/idtentry.h +++ b/arch/x86/include/asm/idtentry.h @@ -57,6 +57,49 @@ static __always_inline void __##func(str \ static __always_inline void __##func(struct pt_regs *regs) +/** + * DECLARE_IDTENTRY_ERRORCODE - Declare functions for simple IDT entry points + * Error code pushed by hardware + * @vector: Vector number (ignored for C) + * @func: Function name of the entry point + * + * Declares three functions: + * - The ASM entry point: asm_##func + * - The XEN PV trap entry point: xen_##func (maybe unused) + * - The C handler called from the ASM entry point + * + * Same as DECLARE_IDTENTRY, but has an extra error_code argument for the + * C-handler. + */ +#define DECLARE_IDTENTRY_ERRORCODE(vector, func) \ + asmlinkage void asm_##func(void); \ + asmlinkage void xen_asm_##func(void); \ + __visible void func(struct pt_regs *regs, unsigned long error_code) + +/** + * DEFINE_IDTENTRY_ERRORCODE - Emit code for simple IDT entry points + * Error code pushed by hardware + * @func: Function name of the entry point + * + * Same as DEFINE_IDTENTRY, but has an extra error_code argument + */ +#define DEFINE_IDTENTRY_ERRORCODE(func) \ +static __always_inline void __##func(struct pt_regs *regs, \ + unsigned long error_code); \ + \ +__visible noinstr void func(struct pt_regs *regs, \ + unsigned long error_code) \ +{ \ + idtentry_enter(regs); \ + instr_begin(); \ + __##func (regs, error_code); \ + instr_end(); \ + idtentry_exit(regs); \ +} \ + \ +static __always_inline void __##func(struct pt_regs *regs, \ + unsigned long error_code) + #else /* !__ASSEMBLY__ */ /* @@ -65,6 +108,9 @@ static __always_inline void __##func(str #define DECLARE_IDTENTRY(vector, func) \ idtentry vector asm_##func func has_error_code=0 sane=1 +#define DECLARE_IDTENTRY_ERRORCODE(vector, func) \ + idtentry vector asm_##func func has_error_code=1 sane=1 + #endif /* __ASSEMBLY__ */ /*