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Thu, 15 Jun 2023 15:46:42 +0000 (GMT) Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E3C8A20043; Thu, 15 Jun 2023 15:46:41 +0000 (GMT) Received: from localhost.localdomain (unknown [9.144.159.119]) by smtpav06.fra02v.mail.ibm.com (Postfix) with ESMTP; Thu, 15 Jun 2023 15:46:41 +0000 (GMT) From: Laurent Dufour To: linux-kernel@vger.kernel.org Subject: [PATCH 10/10] powerpc/pseries: Honour current SMT state when DLPAR onlining CPUs Date: Thu, 15 Jun 2023 17:46:35 +0200 Message-ID: <20230615154635.13660-11-ldufour@linux.ibm.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230615154635.13660-1-ldufour@linux.ibm.com> References: <20230615154635.13660-1-ldufour@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: nXfwAgs5Y7mDP_h_f298NttcCwBTagAh X-Proofpoint-ORIG-GUID: ILE6_SZWj42_A3EWK-8GoGAfYD46l_34 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=2023-06-15_12,2023-06-15_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 impostorscore=0 adultscore=0 lowpriorityscore=0 bulkscore=0 mlxlogscore=879 phishscore=0 spamscore=0 suspectscore=0 malwarescore=0 priorityscore=1501 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2306150136 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: linux-arch@vger.kernel.org, dave.hansen@linux.intel.com, x86@kernel.org, mingo@redhat.com, bp@alien8.de, npiggin@gmail.com, tglx@linutronix.de, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: Michael Ellerman Integrate with the generic SMT support, so that when a CPU is DLPAR onlined it is brought up with the correct SMT mode. Signed-off-by: Michael Ellerman --- arch/powerpc/platforms/pseries/hotplug-cpu.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c b/arch/powerpc/platforms/pseries/hotplug-cpu.c index 61fb7cb00880..e62835a12d73 100644 --- a/arch/powerpc/platforms/pseries/hotplug-cpu.c +++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c @@ -398,6 +398,14 @@ static int dlpar_online_cpu(struct device_node *dn) for_each_present_cpu(cpu) { if (get_hard_smp_processor_id(cpu) != thread) continue; + + if (!topology_is_primary_thread(cpu)) { + if (cpu_smt_control != CPU_SMT_ENABLED) + break; + if (!topology_smt_thread_allowed(cpu)) + break; + } + cpu_maps_update_done(); find_and_update_cpu_nid(cpu); rc = device_online(get_cpu_device(cpu));