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Mon, 14 Aug 2023 10:52:17 +0000 (GMT) Date: Mon, 14 Aug 2023 16:22:17 +0530 From: Srikar Dronamraju To: Laurent Dufour Cc: linuxppc-dev@lists.ozlabs.org, linux-arch@vger.kernel.org, dave.hansen@linux.intel.com, linux-kernel@vger.kernel.org, mingo@redhat.com, bp@alien8.de, npiggin@gmail.com, tglx@linutronix.de, rui.zhang@intel.com Subject: Re: [PATCH v4 09/10] powerpc: Add HOTPLUG_SMT support Message-ID: <20230814105217.m5arvw36tytlda6c@linux.vnet.ibm.com> Reply-To: Srikar Dronamraju References: <20230705145143.40545-1-ldufour@linux.ibm.com> <20230705145143.40545-10-ldufour@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: <20230705145143.40545-10-ldufour@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: mV3pQ_5WxvfmsXlXb6lCYN2zCVftfmBs X-Proofpoint-GUID: W7UrWveYQOWFE_sV2-lTumK-ZkPpA_hq X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-08-14_06,2023-08-10_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 bulkscore=0 clxscore=1015 impostorscore=0 suspectscore=0 mlxlogscore=839 spamscore=0 phishscore=0 adultscore=0 lowpriorityscore=0 mlxscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2308140098 Precedence: bulk List-ID: X-Mailing-List: linux-arch@vger.kernel.org * Laurent Dufour [2023-07-05 16:51:42]: > From: Michael Ellerman > > Add support for HOTPLUG_SMT, which enables the generic sysfs SMT support > files in /sys/devices/system/cpu/smt, as well as the "nosmt" boot > parameter. > > Implement the recently added hooks to allow partial SMT states, allow > any number of threads per core. > > Tie the config symbol to HOTPLUG_CPU, which enables it on the major > platforms that support SMT. If there are other platforms that want the > SMT support that can be tweaked in future. > > Signed-off-by: Michael Ellerman > [ldufour: pass current SMT level to cpu_smt_set_num_threads] > [ldufour: remove topology_smt_supported] > [ldufour: remove topology_smt_threads_supported] > [ldufour: select CONFIG_SMT_NUM_THREADS_DYNAMIC] > [ldufour: update kernel-parameters.txt] > Signed-off-by: Laurent Dufour Looks good to me. Reviewed-by: Srikar Dronamraju -- Thanks and Regards Srikar Dronamraju