From nobody Sun Feb 8 18:19:26 2026 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 A0AABC0015E for ; Fri, 28 Jul 2023 07:58:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234569AbjG1H6k (ORCPT ); Fri, 28 Jul 2023 03:58:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41588 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234556AbjG1H6A (ORCPT ); Fri, 28 Jul 2023 03:58:00 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 98ED135A0; Fri, 28 Jul 2023 00:57:58 -0700 (PDT) Date: Fri, 28 Jul 2023 07:57:55 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1690531075; h=from:from:sender:sender:reply-to: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: in-reply-to:in-reply-to:references:references; bh=5gWSLXCy4of2Obd0KdbLgy6MwVfgLmfmLKJL7BqXty4=; b=x3YuUxb7qaToAxIQ8gwDu6R1CN2UDnwOxPSXZW4hNUXKGoDWYiq7anf5mfU1jKlNforkrq SUcPihHVpsJz531oSf8CO7198WJYlxxN8whp6RtVvVLnsKdgtKhQVjhVM2LKHrFTvwcos0 5rbiyfUgCqgoqINXFQJ0neNilo9PxkD98jECywc5tjRzQKBldPJ3CLFqTS4dL/D4N+aJm0 cYAxxtfhn/2o3J/t05t5gujUtMauQE2DaxRCZ4apfkD8skNcHVU8dIsvojQtH8Oimdv4q8 hAspDC47QgfsaFtJQuE7b6CVPLw9c46toOuAwTiQk1sRBYE7iA9KkOobtuGqEQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1690531075; h=from:from:sender:sender:reply-to: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: in-reply-to:in-reply-to:references:references; bh=5gWSLXCy4of2Obd0KdbLgy6MwVfgLmfmLKJL7BqXty4=; b=sGWBYJKHHXLGO7BPQud/fRbd0IUO9my1YIAJkmNNt9bzvbRoKGTbWrrnRYlPgYXiu4bNc5 O4Y1EQl5D2q/8FBg== From: "tip-bot2 for Michael Ellerman" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: smp/core] cpu/SMT: Move SMT prototypes into cpu_smt.h Cc: Michael Ellerman , Laurent Dufour , Thomas Gleixner , Zhang Rui , x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20230705145143.40545-3-ldufour@linux.ibm.com> References: <20230705145143.40545-3-ldufour@linux.ibm.com> MIME-Version: 1.0 Message-ID: <169053107521.28540.11891274511415221088.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The following commit has been merged into the smp/core branch of tip: Commit-ID: 3f9169196be55590a794b52f49637561ddd1ba4f Gitweb: https://git.kernel.org/tip/3f9169196be55590a794b52f49637561d= dd1ba4f Author: Michael Ellerman AuthorDate: Wed, 05 Jul 2023 16:51:35 +02:00 Committer: Thomas Gleixner CommitterDate: Fri, 28 Jul 2023 09:53:36 +02:00 cpu/SMT: Move SMT prototypes into cpu_smt.h In order to export the cpuhp_smt_control enum as part of the interface between generic and architecture code, the architecture code needs to include asm/topology.h. But that leads to circular header dependencies. So split the enum and related declarations into a separate header. [ ldufour: Reworded the commit's description ] Signed-off-by: Michael Ellerman Signed-off-by: Laurent Dufour Signed-off-by: Thomas Gleixner Tested-by: Zhang Rui Link: https://lore.kernel.org/r/20230705145143.40545-3-ldufour@linux.ibm.com --- arch/x86/include/asm/topology.h | 2 ++ include/linux/cpu.h | 25 +------------------------ include/linux/cpu_smt.h | 29 +++++++++++++++++++++++++++++ kernel/cpu.c | 1 + 4 files changed, 33 insertions(+), 24 deletions(-) create mode 100644 include/linux/cpu_smt.h diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topolog= y.h index caf41c4..ae49ed4 100644 --- a/arch/x86/include/asm/topology.h +++ b/arch/x86/include/asm/topology.h @@ -136,6 +136,8 @@ static inline int topology_max_smt_threads(void) return __max_smt_threads; } =20 +#include + int topology_update_package_map(unsigned int apicid, unsigned int cpu); int topology_update_die_map(unsigned int dieid, unsigned int cpu); int topology_phys_to_logical_pkg(unsigned int pkg); diff --git a/include/linux/cpu.h b/include/linux/cpu.h index 6e6e57e..6b326a9 100644 --- a/include/linux/cpu.h +++ b/include/linux/cpu.h @@ -18,6 +18,7 @@ #include #include #include +#include =20 struct device; struct device_node; @@ -204,30 +205,6 @@ void cpuhp_report_idle_dead(void); static inline void cpuhp_report_idle_dead(void) { } #endif /* #ifdef CONFIG_HOTPLUG_CPU */ =20 -enum cpuhp_smt_control { - CPU_SMT_ENABLED, - CPU_SMT_DISABLED, - CPU_SMT_FORCE_DISABLED, - CPU_SMT_NOT_SUPPORTED, - CPU_SMT_NOT_IMPLEMENTED, -}; - -#if defined(CONFIG_SMP) && defined(CONFIG_HOTPLUG_SMT) -extern enum cpuhp_smt_control cpu_smt_control; -extern void cpu_smt_disable(bool force); -extern void cpu_smt_check_topology(void); -extern bool cpu_smt_possible(void); -extern int cpuhp_smt_enable(void); -extern int cpuhp_smt_disable(enum cpuhp_smt_control ctrlval); -#else -# define cpu_smt_control (CPU_SMT_NOT_IMPLEMENTED) -static inline void cpu_smt_disable(bool force) { } -static inline void cpu_smt_check_topology(void) { } -static inline bool cpu_smt_possible(void) { return false; } -static inline int cpuhp_smt_enable(void) { return 0; } -static inline int cpuhp_smt_disable(enum cpuhp_smt_control ctrlval) { retu= rn 0; } -#endif - extern bool cpu_mitigations_off(void); extern bool cpu_mitigations_auto_nosmt(void); =20 diff --git a/include/linux/cpu_smt.h b/include/linux/cpu_smt.h new file mode 100644 index 0000000..722c2e3 --- /dev/null +++ b/include/linux/cpu_smt.h @@ -0,0 +1,29 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_CPU_SMT_H_ +#define _LINUX_CPU_SMT_H_ + +enum cpuhp_smt_control { + CPU_SMT_ENABLED, + CPU_SMT_DISABLED, + CPU_SMT_FORCE_DISABLED, + CPU_SMT_NOT_SUPPORTED, + CPU_SMT_NOT_IMPLEMENTED, +}; + +#if defined(CONFIG_SMP) && defined(CONFIG_HOTPLUG_SMT) +extern enum cpuhp_smt_control cpu_smt_control; +extern void cpu_smt_disable(bool force); +extern void cpu_smt_check_topology(void); +extern bool cpu_smt_possible(void); +extern int cpuhp_smt_enable(void); +extern int cpuhp_smt_disable(enum cpuhp_smt_control ctrlval); +#else +# define cpu_smt_control (CPU_SMT_NOT_IMPLEMENTED) +static inline void cpu_smt_disable(bool force) { } +static inline void cpu_smt_check_topology(void) { } +static inline bool cpu_smt_possible(void) { return false; } +static inline int cpuhp_smt_enable(void) { return 0; } +static inline int cpuhp_smt_disable(enum cpuhp_smt_control ctrlval) { retu= rn 0; } +#endif + +#endif /* _LINUX_CPU_SMT_H_ */ diff --git a/kernel/cpu.c b/kernel/cpu.c index 03309f2..e02204c 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -592,6 +592,7 @@ static void lockdep_release_cpus_lock(void) void __weak arch_smt_update(void) { } =20 #ifdef CONFIG_HOTPLUG_SMT + enum cpuhp_smt_control cpu_smt_control __read_mostly =3D CPU_SMT_ENABLED; =20 void __init cpu_smt_disable(bool force)