From patchwork Fri Jul 21 01:51:01 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pavel Tatashin X-Patchwork-Id: 791841 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=sparclinux-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3xDDJN0t02z9s75 for ; Fri, 21 Jul 2017 11:51:16 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965825AbdGUBvN (ORCPT ); Thu, 20 Jul 2017 21:51:13 -0400 Received: from userp1040.oracle.com ([156.151.31.81]:44023 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965551AbdGUBvN (ORCPT ); Thu, 20 Jul 2017 21:51:13 -0400 Received: from aserv0022.oracle.com (aserv0022.oracle.com [141.146.126.234]) by userp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id v6L1p9F0006555 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 21 Jul 2017 01:51:09 GMT Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by aserv0022.oracle.com (8.14.4/8.14.4) with ESMTP id v6L1p83t028901 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 21 Jul 2017 01:51:09 GMT Received: from abhmp0015.oracle.com (abhmp0015.oracle.com [141.146.116.21]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id v6L1p8jZ019398; Fri, 21 Jul 2017 01:51:08 GMT Received: from ca-ldom-ol-build-1.us.oracle.com (/10.129.68.23) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 20 Jul 2017 18:51:08 -0700 From: Pavel Tatashin To: sparclinux@vger.kernel.org, bob.picco@oracle.com, davem@davemloft.net Subject: [PATCH v1 4/4] sparc64: add boot line core to context domain parameter Date: Thu, 20 Jul 2017 21:51:01 -0400 Message-Id: <1500601861-203232-5-git-send-email-pasha.tatashin@oracle.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1500601861-203232-1-git-send-email-pasha.tatashin@oracle.com> References: <1500601861-203232-1-git-send-email-pasha.tatashin@oracle.com> X-Source-IP: aserv0022.oracle.com [141.146.126.234] Sender: sparclinux-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: sparclinux@vger.kernel.org Add an option to cause fewer cores to a context domain. A value of zero is allowed to for a single context domain. The boot command line parameter name is "cores_to_context_domain". Signed-off-by: Pavel Tatashin Signed-off-by: Bob Picco --- arch/sparc/mm/init_64.c | 17 +++++++++++++++++ 1 files changed, 17 insertions(+), 0 deletions(-) diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c index 8c61fbc..9ada3c8 100644 --- a/arch/sparc/mm/init_64.c +++ b/arch/sparc/mm/init_64.c @@ -2302,6 +2302,23 @@ static unsigned short cpu_to_context_domain_id(int cpu) return cpu / strands_to_context_domain; } +static int __init core_to_cd_early(char *p) +{ + unsigned short result; + + if (kstrtou16(p, 10, &result) < 0) { + pr_err("Invalid core to context domain value.\n"); + return 0; + } + + cores_to_context_domain = result; + pr_info("Using core to context domain count of %u.\n", + cores_to_context_domain); + return 0; +} + +early_param("cores_to_context_domain", core_to_cd_early); + static void __init context_domains_init(void) { phys_addr_t cda_size;