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 71C7CEB64DC for ; Wed, 28 Jun 2023 10:12:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231220AbjF1KMF (ORCPT ); Wed, 28 Jun 2023 06:12:05 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:55748 "EHLO mx0b-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230458AbjF1KGu (ORCPT ); Wed, 28 Jun 2023 06:06:50 -0400 Received: from pps.filterd (m0360072.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 35SA340d000680; Wed, 28 Jun 2023 10:06:37 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=tBJniILrv67rMmqL7C9oGbfvlECwbA5Rr3vj+TgxJL4=; b=HWRJg2u1lwxVdlG6NU5q/mBljBJTGNCZEQJJJakJg9JxWy3KBzrScNXcxfWzk+0kAtzk LbhlNO3LnBtjUZtxIP+BHd1QeL8wYGRDt7EzVulZMZ2R4ZHccQgVh2V1p+41SiSaQM5l NQakTyYiaeEJ+7W+OJQiF5mkayoGWHW6HufDPWTm19hIaW6hSA0nOtDSG+sp6IWGQB3y OVCKXL/ygYPe7eDt/Vsdhl4f0il0mmU4oaB9Rb6ahPC7FgtsuwaUH87V7JpCD6Xv681i ygTJ4gMT5fPkhueORzoA7mKZScV58RpYVFlUqMiatwAbL/Tsag9SSGrrtQ23n7iA5EM6 hg== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3rgjs0r4kt-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 28 Jun 2023 10:06:35 +0000 Received: from m0360072.ppops.net (m0360072.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 35SA3HJg001801; Wed, 28 Jun 2023 10:06:24 GMT Received: from ppma06ams.nl.ibm.com (66.31.33a9.ip4.static.sl-reverse.com [169.51.49.102]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3rgjs0r4b3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 28 Jun 2023 10:06:24 +0000 Received: from pps.filterd (ppma06ams.nl.ibm.com [127.0.0.1]) by ppma06ams.nl.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 35RNvb77026359; Wed, 28 Jun 2023 10:06:06 GMT Received: from smtprelay03.fra02v.mail.ibm.com ([9.218.2.224]) by ppma06ams.nl.ibm.com (PPS) with ESMTPS id 3rdqre2faf-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 28 Jun 2023 10:06:06 +0000 Received: from smtpav07.fra02v.mail.ibm.com (smtpav07.fra02v.mail.ibm.com [10.20.54.106]) by smtprelay03.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 35SA64nx20447786 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 28 Jun 2023 10:06:04 GMT Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id F17302005A; Wed, 28 Jun 2023 10:06:03 +0000 (GMT) Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2608720067; Wed, 28 Jun 2023 10:06:03 +0000 (GMT) Received: from localhost.localdomain (unknown [9.171.41.43]) by smtpav07.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 28 Jun 2023 10:06:03 +0000 (GMT) From: Laurent Dufour To: linuxppc-dev@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, tglx@linutronix.de, dave.hansen@linux.intel.com, mingo@redhat.com, bp@alien8.de Subject: [PATCH v2 4/9] cpu/SMT: Remove topology_smt_supported() Date: Wed, 28 Jun 2023 12:05:53 +0200 Message-ID: <20230628100558.43482-5-ldufour@linux.ibm.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230628100558.43482-1-ldufour@linux.ibm.com> References: <20230628100558.43482-1-ldufour@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: hYi_HeAVfqzMW4iPjLnc1a-Hrswq_G9v X-Proofpoint-GUID: O6HFOq1oVYm6U4lM_DruPdAMcNVeWxvm X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-06-28_06,2023-06-27_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 impostorscore=0 suspectscore=0 priorityscore=1501 malwarescore=0 adultscore=0 spamscore=0 clxscore=1015 bulkscore=0 mlxscore=0 mlxlogscore=999 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2306280088 Precedence: bulk List-ID: X-Mailing-List: linux-arch@vger.kernel.org Since the maximum number of threads is now passed to cpu_smt_set_num_threads(), checking that value is enough to know if SMT is supported. Cc: Michael Ellerman Suggested-by: Thomas Gleixner Signed-off-by: Laurent Dufour --- arch/x86/include/asm/topology.h | 2 -- arch/x86/kernel/smpboot.c | 8 -------- kernel/cpu.c | 2 +- 3 files changed, 1 insertion(+), 11 deletions(-) diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h index 66927a59e822..87358a8fe843 100644 --- a/arch/x86/include/asm/topology.h +++ b/arch/x86/include/asm/topology.h @@ -143,7 +143,6 @@ int topology_update_die_map(unsigned int dieid, unsigned int cpu); int topology_phys_to_logical_pkg(unsigned int pkg); int topology_phys_to_logical_die(unsigned int die, unsigned int cpu); bool topology_is_primary_thread(unsigned int cpu); -bool topology_smt_supported(void); #else #define topology_max_packages() (1) static inline int @@ -156,7 +155,6 @@ static inline int topology_phys_to_logical_die(unsigned int die, static inline int topology_max_die_per_package(void) { return 1; } static inline int topology_max_smt_threads(void) { return 1; } static inline bool topology_is_primary_thread(unsigned int cpu) { return true; } -static inline bool topology_smt_supported(void) { return false; } #endif static inline void arch_fix_phys_package_id(int num, u32 slot) diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 352f0ce1ece4..3052c171668d 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -278,14 +278,6 @@ bool topology_is_primary_thread(unsigned int cpu) return apic_id_is_primary_thread(per_cpu(x86_cpu_to_apicid, cpu)); } -/** - * topology_smt_supported - Check whether SMT is supported by the CPUs - */ -bool topology_smt_supported(void) -{ - return smp_num_siblings > 1; -} - /** * topology_phys_to_logical_pkg - Map a physical package id to a logical * diff --git a/kernel/cpu.c b/kernel/cpu.c index edca8b7bd400..e354af92b2b8 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -442,7 +442,7 @@ void __init cpu_smt_set_num_threads(unsigned int num_threads, { WARN_ON(!num_threads || (num_threads > max_threads)); - if (!topology_smt_supported()) + if (max_threads == 1) cpu_smt_control = CPU_SMT_NOT_SUPPORTED; cpu_smt_max_threads = max_threads; -- 2.41.0