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Fri, 21 Nov 2025 02:55:43 GMT Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 083D42019B; Fri, 21 Nov 2025 02:55:43 +0000 (GMT) Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1CDD020199; Fri, 21 Nov 2025 02:55:00 +0000 (GMT) Received: from li-c439904c-24ed-11b2-a85c-b284a6847472.in.ibm.com (unknown [9.98.111.108]) by smtpav07.fra02v.mail.ibm.com (Postfix) with ESMTP; Fri, 21 Nov 2025 02:54:39 +0000 (GMT) From: Madhavan Srinivasan To: linuxppc-dev@lists.ozlabs.org, Srikar Dronamraju Cc: Christophe Leroy , linux-kernel@vger.kernel.org, Michael Ellerman , Nicholas Piggin , Peter Zijlstra , Thomas Gleixner , Shrikanth Hegde Subject: Re: [PATCH v2] powerpc/smp: Expose die_id and die_cpumask Date: Fri, 21 Nov 2025 08:24:09 +0530 Message-ID: <176369324788.72695.18054078744608030993.b4-ty@linux.ibm.com> X-Mailer: git-send-email 2.51.1 In-Reply-To: <20251112074859.814087-1-srikar@linux.ibm.com> References: <20251112074859.814087-1-srikar@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=C/nkCAP+ c=1 sm=1 tr=0 ts=691fd4b4 cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=IkcTkHD0fZMA:10 a=6UeiqGixMTsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=VwQbUJbxAAAA:8 a=pMH8iXYfuX0DPzzJjpoA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-GUID: qShj5Im0oPX7-aEgSeCH4hmHremRHEHr X-Proofpoint-ORIG-GUID: RHhbU348MaMfK5XTrs4So9ky7v83G-Rw X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTE1MDAzMiBTYWx0ZWRfXwzfQpiHt0iel L7r/ELOIF2wFYkrRpKfJ4tpfIMpcJYaEMmaD2GKoCVKhECDJ3NLa49CROPfpxfGc8Oqg5/AneH4 ThG6r4sEdU4Uhm9/bKPAi990tUNP7RM7xbHNYvocNa1PK2teNZrIKCpPrT5UvqdFQuocGAocT61 74ka+f1/P7BxX8C/SBaFrhwbUKCIxBdPIC7SVAJq1ceNegGKiTorv39JLAdRFyAdcEmStJuEy+m 3OgmPsE35hBuM5BlefQ9y2IiBcqUTbpA/F2llXO4LahN8+Dbm5pfZVHw5NcfxFzvxrdb0D9sUbQ +DvE4W+3Oi9hBs8siaj8SqMmamjdYkvBHWcVIhQOiNbyoyRUkEAxt9tf7oRc9E+ZBTCLANRAhEj GSQpkFFMnm71ICZhdvny2R6zgmOr2w== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-11-21_01,2025-11-20_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 priorityscore=1501 spamscore=0 impostorscore=0 bulkscore=0 malwarescore=0 suspectscore=0 clxscore=1015 lowpriorityscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2510240000 definitions=main-2511150032 On Wed, 12 Nov 2025 13:18:59 +0530, Srikar Dronamraju wrote: > >From Power10 processors onwards, each chip has 2 hemispheres. For LPARs > running on PowerVM Hypervisor, hypervisor determines the allocation of > CPU groups to each LPAR, resulting in two LPARs with the same number of > CPUs potentially having different numbers of CPUs from each hemisphere. > Additionally, it is not feasible to ascertain the hemisphere based > solely on the CPU number. > > [...] Applied to powerpc/next. [1/1] powerpc/smp: Expose die_id and die_cpumask https://git.kernel.org/powerpc/c/fb2ff9fa72e20a75cab0ffc9dc8735de68ed4d0d Thanks