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=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 C2FE1ECE564 for ; Tue, 18 Sep 2018 21:44:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 77CC220C0E for ; Tue, 18 Sep 2018 21:44:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 77CC220C0E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=zytor.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730506AbeISDSi (ORCPT ); Tue, 18 Sep 2018 23:18:38 -0400 Received: from terminus.zytor.com ([198.137.202.136]:38093 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727958AbeISDSi (ORCPT ); Tue, 18 Sep 2018 23:18:38 -0400 Received: from terminus.zytor.com (localhost [127.0.0.1]) by terminus.zytor.com (8.15.2/8.15.2) with ESMTPS id w8ILhxC8928627 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Tue, 18 Sep 2018 14:43:59 -0700 Received: (from tipbot@localhost) by terminus.zytor.com (8.15.2/8.15.2/Submit) id w8ILhxmd928624; Tue, 18 Sep 2018 14:43:59 -0700 Date: Tue, 18 Sep 2018 14:43:59 -0700 X-Authentication-Warning: terminus.zytor.com: tipbot set sender to tipbot@zytor.com using -f From: tip-bot for Reinette Chatre Message-ID: Cc: fenghua.yu@intel.com, hpa@zytor.com, tglx@linutronix.de, yu.c.chen@intel.com, tony.luck@intel.com, linux-kernel@vger.kernel.org, xiaochen.shen@intel.com, reinette.chatre@intel.com, mingo@kernel.org Reply-To: tglx@linutronix.de, hpa@zytor.com, fenghua.yu@intel.com, tony.luck@intel.com, yu.c.chen@intel.com, reinette.chatre@intel.com, xiaochen.shen@intel.com, linux-kernel@vger.kernel.org, mingo@kernel.org In-Reply-To: <1537048707-76280-4-git-send-email-fenghua.yu@intel.com> References: <1537048707-76280-4-git-send-email-fenghua.yu@intel.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/urgent] x86/intel_rdt: Global closid helper to support future fixes Git-Commit-ID: c793da8e4c62d2c002a79c47f44efead450cbcae X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: c793da8e4c62d2c002a79c47f44efead450cbcae Gitweb: https://git.kernel.org/tip/c793da8e4c62d2c002a79c47f44efead450cbcae Author: Reinette Chatre AuthorDate: Sat, 15 Sep 2018 14:58:21 -0700 Committer: Thomas Gleixner CommitDate: Tue, 18 Sep 2018 23:38:05 +0200 x86/intel_rdt: Global closid helper to support future fixes The number of CLOSIDs supported by a system is the minimum number of CLOSIDs supported by any of its resources. Care should be taken when iterating over the CLOSIDs of a resource since it may be that the number of CLOSIDs supported on the system is less than the number of CLOSIDs supported by the resource. Introduce a helper function that can be used to query the number of CLOSIDs that is supported by all resources, irrespective of how many CLOSIDs are supported by a particular resource. Signed-off-by: Reinette Chatre Signed-off-by: Fenghua Yu Signed-off-by: Thomas Gleixner Cc: "H Peter Anvin" Cc: "Tony Luck" Cc: "Xiaochen Shen" Cc: "Chen Yu" Link: https://lkml.kernel.org/r/1537048707-76280-4-git-send-email-fenghua.yu@intel.com --- arch/x86/kernel/cpu/intel_rdt.h | 1 + arch/x86/kernel/cpu/intel_rdt_rdtgroup.c | 7 +++++++ 2 files changed, 8 insertions(+) diff --git a/arch/x86/kernel/cpu/intel_rdt.h b/arch/x86/kernel/cpu/intel_rdt.h index 78266c798280..285eb3ec4200 100644 --- a/arch/x86/kernel/cpu/intel_rdt.h +++ b/arch/x86/kernel/cpu/intel_rdt.h @@ -544,6 +544,7 @@ int rdtgroup_pseudo_lock_create(struct rdtgroup *rdtgrp); void rdtgroup_pseudo_lock_remove(struct rdtgroup *rdtgrp); struct rdt_domain *get_domain_from_cpu(int cpu, struct rdt_resource *r); int update_domains(struct rdt_resource *r, int closid); +int closids_supported(void); void closid_free(int closid); int alloc_rmid(void); void free_rmid(u32 rmid); diff --git a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c index 32e8bbdf2400..b372923eb209 100644 --- a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c +++ b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c @@ -97,6 +97,12 @@ void rdt_last_cmd_printf(const char *fmt, ...) * limited as the number of resources grows. */ static int closid_free_map; +static int closid_free_map_len; + +int closids_supported(void) +{ + return closid_free_map_len; +} static void closid_init(void) { @@ -111,6 +117,7 @@ static void closid_init(void) /* CLOSID 0 is always reserved for the default group */ closid_free_map &= ~1; + closid_free_map_len = rdt_min_closid; } static int closid_alloc(void)