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Tue, 14 Jul 2020 04:37:14 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4CF8DA4054; Tue, 14 Jul 2020 04:37:12 +0000 (GMT) Received: from srikart450.in.ibm.com (unknown [9.85.70.163]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 14 Jul 2020 04:37:12 +0000 (GMT) From: Srikar Dronamraju To: Michael Ellerman Subject: [PATCH 11/11] powerpc/smp: Provide an ability to disable coregroup Date: Tue, 14 Jul 2020 10:06:24 +0530 Message-Id: <20200714043624.5648-12-srikar@linux.vnet.ibm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200714043624.5648-1-srikar@linux.vnet.ibm.com> References: <20200714043624.5648-1-srikar@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235, 18.0.687 definitions=2020-07-13_17:2020-07-13, 2020-07-13 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 clxscore=1015 suspectscore=0 phishscore=0 priorityscore=1501 bulkscore=0 malwarescore=0 mlxscore=0 mlxlogscore=999 spamscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2007140029 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Nathan Lynch , Gautham R Shenoy , Oliver OHalloran , Michael Neuling , Srikar Dronamraju , Michael Ellerman , Anton Blanchard , linuxppc-dev , Nick Piggin Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" If user wants to enable coregroup sched_domain then they can boot with kernel parameter "coregroup_support=on" Cc: linuxppc-dev Cc: Michael Ellerman Cc: Nick Piggin Cc: Oliver OHalloran Cc: Nathan Lynch Cc: Michael Neuling Cc: Anton Blanchard Cc: Gautham R Shenoy Cc: Vaidyanathan Srinivasan Signed-off-by: Srikar Dronamraju --- arch/powerpc/kernel/smp.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index bb25c13bbb79..c43909e6e8e9 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -118,6 +118,23 @@ struct smp_ops_t *smp_ops; volatile unsigned int cpu_callin_map[NR_CPUS]; int smt_enabled_at_boot = 1; +int coregroup_support; + +static int __init early_coregroup(char *p) +{ + if (!p) + return 0; + + if (strstr(p, "on")) + coregroup_support = 1; + + if (strstr(p, "1")) + coregroup_support = 1; + + return 0; +} + +early_param("coregroup_support", early_coregroup); /* * Returns 1 if the specified cpu should be brought up during boot. @@ -878,7 +895,7 @@ static struct cpumask *cpu_coregroup_mask(int cpu) static bool has_coregroup_support(void) { - return coregroup_enabled; + return coregroup_enabled && coregroup_support; } static const struct cpumask *cpu_mc_mask(int cpu) -- 2.17.1