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Tue, 25 Aug 2026 13:35:11 +0000 (GMT) Received: from osiris (unknown [9.224.90.220]) by smtpav01.fra02v.mail.ibm.com (Postfix) with ESMTPS; Tue, 25 Aug 2026 13:35:11 +0000 (GMT) Date: Tue, 25 Aug 2026 15:35:10 +0200 From: Heiko Carstens To: Mete Durlu Cc: Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , linux-s390@vger.kernel.org Subject: Re: [PATCH] s390/topology: Switch to common cpu capacity code Message-ID: <20260825133510.12095D6d-hca@linux.ibm.com> References: <20260825-common_capacity-v1-1-1cdfa3ad5e14@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260825-common_capacity-v1-1-1cdfa3ad5e14@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Info: AW1haW4tMjYwODI1MDExNSBTYWx0ZWRfX3Z4GpVD0xF9/ +UXpg1oBblgKihDN4429Khv8ba9PcfD3BXHSmHV+gFTXkXdiZtY5AUdh8kLhYy5p+b+r9F7mqoM PQKBlPXgPung389ECpXlYEUo1UpFvy8= X-Proofpoint-GUID: m-LfyQMKAMOqLXjKHVomJ8YsHhz77EDH X-Proofpoint-ORIG-GUID: m-LfyQMKAMOqLXjKHVomJ8YsHhz77EDH X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODI1MDExNSBTYWx0ZWRfXyZ//HNf4fjPV iYtHHj7wEyASMtVnK/iCO+UjdAO+myihHGNeD3f4mXOAYbx+iVxQYeZl9V7gVK2KY+oEAV/wKOp O0cxU4AfTVCFkBHFM37xkb5s2GW0gneZ0VaZ/gQxMk7uFG8XkguWV9iXlgpvBF1k9vN0BdepBiC TaVa0P/qEOyN5RVv5Xc/IxvrocHml/L3CS2sJxIkv/nz7vXP/ST+Eoe76EjSOyiKQyiJB7CA7E6 KBEXRnBIhmbbO0e9sNL4xVSxTqq1E4ccOGCmyPzJcg09ZCf0m9mEFc1/SvldGm4wkP2pTaR6/8f RW14liqWIeZLWNPLE+M9XiKiP+Pm+fMLZBllCMDqpeNsdveNiWD6S7G6S78rB7b2FRlbVPjsR93 df8deHvypGTx1u6LinVuqzQCQM7ddyIQG7WGDMTZ2Fga7JYpENM2Sb9iHLS2yvhwOIeXD1J+s4X 8H71eJl5vOjyY3kbKlg== X-Authority-Analysis: v=2.4 cv=H7brBeYi c=1 sm=1 tr=0 ts=6a8d9a14 cx=c_pps a=5BHTudwdYE3Te8bg5FgnPg==:117 a=5BHTudwdYE3Te8bg5FgnPg==:17 a=kj9zAlcOel0A:10 a=Sv0fKeRqtYgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=Y2IxJ9c9Rs8Kov3niI8_:22 a=VnNF1IyMAAAA:8 a=Puiun7Du49nS_SMLvowA:9 a=CjuIK1q_8ugA:10 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-25_03,2026-08-24_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 malwarescore=0 lowpriorityscore=0 impostorscore=0 spamscore=0 bulkscore=0 adultscore=0 priorityscore=1501 clxscore=1015 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608250115 On Tue, Aug 25, 2026 at 02:58:20PM +0200, Mete Durlu wrote: > s390 implementation of cpu capacity management infrastructure code does > not do anything different than its common code counterpart. Switch to > common code functions and remove the smp_cpu_*_capacity() functions. > Make s390 code better align with other architectures which utilize > cpu_capacity. No functional changes. > > Allow cpu_capacity attributes inside sysfs to accurately reflect cpu > capacity. > ex: > > $ cat /sys/devices/system/cpu/cpu0/polarization > vertical:high > $ cat /sys/devices/system/cpu/cpu0/cpu_capacity > 1024 > > $ cat /sys/devices/system/cpu/cpu40/polarization > vertical:low > $ cat /sys/devices/system/cpu/cpu40/cpu_capacity > 128 > > Prior to commit 6bceea7a1e07 ("arch_topology: Relocate cpu_scale to > topology.[h|c]") cpu_capacity attribute was only available to the common > arch_topology driver's users. Reflect the correct values to the newly > made available attributes. > > Signed-off-by: Mete Durlu > --- > arch/s390/include/asm/processor.h | 1 - > arch/s390/include/asm/smp.h | 4 +--- > arch/s390/kernel/smp.c | 16 +++------------- > arch/s390/kernel/topology.c | 2 +- > 4 files changed, 5 insertions(+), 18 deletions(-) Reviewed-by: Heiko Carstens