From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 41297261B8D for ; Wed, 12 Nov 2025 11:11:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.163.158.5 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762945890; cv=none; b=lM/cMAfpTjr9E63DY9o4i+70HEE2jttCfpqhin45sjf4MdcD2WRimtXmgN1iiNSK8TJQHncgu1ex/CYpdJhkckHPFFCnXOYGFrpp3bCWYknlaqfJj5GPLFqXvZxfqcjbJhEUUgijtnR1aC5zGWEajeLihz0jZGgXpmWQCARQRKY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762945890; c=relaxed/simple; bh=o+/jXOMZuEavD16LLHnlordxDvfsBC40bHCEV9MqK8c=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=liALS6QE920TB6RHmpdBqlYhu+tkoGtbhzypFpRWXr+n2+DckEOeRhcCBzCrqkm6wenEmHgzVqdQB1YaK1gJg13DMTWKTkdkp3cDM5EmZ0SBVJasBFI8k057YluEuGtbAk5oaXwsGNCVEsOabQDExD8oz3aZOoqT80C0ajfwbCA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com; spf=pass smtp.mailfrom=linux.ibm.com; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b=TFwuHogb; arc=none smtp.client-ip=148.163.158.5 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="TFwuHogb" Received: from pps.filterd (m0353725.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 5AC3IjJV001126; Wed, 12 Nov 2025 11:11:14 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:date:from:message-id:mime-version :subject:to; s=pp1; bh=BTqpXblR2MmWwuxnWmnvD7lHq17zUp97beScJJW/T J8=; b=TFwuHogbpRKQAmI++jBNelUUgtu4ezVnYY3bebc4hJZQpu8yLT0wmSZh8 1wbjzlkps5MDi3hubU/rhQQeQ1ibPI4lyUpNnMuRn34OOV8LoBnQEjZvL+5wFdvM CC5lG0L8WqV3OjVs1+PBiWWgxiZQpvkKHwzZxVgrSNFVKtdQdtnGiWZWzq+BZnsK OlBJ7PN7jbEhLJdJI6PWfoypv5jHbZgLvJH9TQFyFt/zpa8UL8MQMD+WoeJfKJJw RyXMCZXe3fwGXkGawPCleS3NZky8xuExjMAUULlFX5k5fheUx/NdKTfkSl2xhNYP 6v+EvtpOZFjJ9cICQ5idPs7PDpxHQ== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 4aa5tjyn5b-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 12 Nov 2025 11:11:14 +0000 (GMT) Received: from m0353725.ppops.net (m0353725.ppops.net [127.0.0.1]) by pps.reinject (8.18.1.12/8.18.0.8) with ESMTP id 5ACAx5pm010146; Wed, 12 Nov 2025 11:11:14 GMT Received: from ppma23.wdc07v.mail.ibm.com (5d.69.3da9.ip4.static.sl-reverse.com [169.61.105.93]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 4aa5tjyn58-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 12 Nov 2025 11:11:14 +0000 (GMT) Received: from pps.filterd (ppma23.wdc07v.mail.ibm.com [127.0.0.1]) by ppma23.wdc07v.mail.ibm.com (8.18.1.2/8.18.1.2) with ESMTP id 5ACA0q7M014773; Wed, 12 Nov 2025 11:11:13 GMT Received: from smtprelay04.fra02v.mail.ibm.com ([9.218.2.228]) by ppma23.wdc07v.mail.ibm.com (PPS) with ESMTPS id 4aahpk7qwh-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 12 Nov 2025 11:11:13 +0000 Received: from smtpav05.fra02v.mail.ibm.com (smtpav05.fra02v.mail.ibm.com [10.20.54.104]) by smtprelay04.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 5ACBB99T14221592 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 12 Nov 2025 11:11:09 GMT Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6E59520040; Wed, 12 Nov 2025 11:11:09 +0000 (GMT) Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CCE4420043; Wed, 12 Nov 2025 11:11:04 +0000 (GMT) Received: from sapthagiri.in.ibm.com (unknown [9.124.211.234]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 12 Nov 2025 11:11:04 +0000 (GMT) From: Srikar Dronamraju To: linuxppc-dev@lists.ozlabs.org Cc: Christophe Leroy , linux-kernel@vger.kernel.org, Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Srikar Dronamraju Subject: [PATCH 1/2] pseries/dtl: Use counter in !native case too Date: Wed, 12 Nov 2025 16:40:50 +0530 Message-ID: <20251112111051.826922-1-srikar@linux.ibm.com> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: ib7pZsNNWkwU5Trv04yv-P-Sp-MgXuZb X-Proofpoint-ORIG-GUID: x8VQZjiPMy92tBnSydqtSQPTAEySXqdY X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTA4MDA5OSBTYWx0ZWRfX+tYSsd+t7z9+ dmSClN27O/TpPM3m+eluMGgCWhL4rlWc7ffpmUHStbn7iE+GLSHEyQe/QEem3RQSpA3ntFpH+U5 8oM+SE2qfU1/MxIgd91qngWeFW3VyLqrAdMiyvpNJlcB3XgCIvRuAinjmycLlWQiUSEKaL+d3aQ p3juOqXJc+TDVMWTZa/aoJgaYQh9dz3hD6rtxTS7bnXzlogjHNTEM00mV/G4rXS1lZVU87twFdF LdAP8Ok/ceOs7Gs8SPOzZG7beAF8+3onB4rc4rNmdvYc4Uz3bu+UmE21K5FwizgioH0NM1R2qec TM4IAjNF0gMF0ZDdov7GyedRXyiZjE8BesiWMzLO/z4EDQnZ8QTKH3FBRISTanXIBhZx7/cnHzL suzHrZeTsP3BQboOXpQWVtDEfpfIvw== X-Authority-Analysis: v=2.4 cv=V6xwEOni c=1 sm=1 tr=0 ts=69146b52 cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=6UeiqGixMTsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=VnNF1IyMAAAA:8 a=8Y62QmFTzL-Gdt_Yfd0A:9 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=2025-11-12_03,2025-11-11_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 lowpriorityscore=0 adultscore=0 malwarescore=0 impostorscore=0 suspectscore=0 priorityscore=1501 phishscore=0 bulkscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2510240000 definitions=main-2511080099 Currently dtl_count is only under CONFIG_VIRT_CPU_ACCOUNTING_NATIVE. Its used to track and clear dtl_consumer callback. Going forward will be using this counter to track if dtl is in-use across configs. Hence adding its use in !CONFIG_VIRT_CPU_ACCOUNTING_NATIVE case too. Signed-off-by: Srikar Dronamraju --- arch/powerpc/platforms/pseries/dtl.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/platforms/pseries/dtl.c b/arch/powerpc/platforms/pseries/dtl.c index f293588b8c7b..6c95781cafb7 100644 --- a/arch/powerpc/platforms/pseries/dtl.c +++ b/arch/powerpc/platforms/pseries/dtl.c @@ -36,6 +36,8 @@ static u8 dtl_event_mask = DTL_LOG_ALL; * not cross a 4k boundary. */ static int dtl_buf_entries = N_DISPATCH_LOG; +static atomic_t dtl_count; + #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE @@ -56,8 +58,6 @@ struct dtl_ring { static DEFINE_PER_CPU(struct dtl_ring, dtl_rings); -static atomic_t dtl_count; - /* * The cpu accounting code controls the DTL ring buffer, and we get * given entries as they are processed. @@ -158,7 +158,7 @@ static int dtl_start(struct dtl *dtl) /* enable event logging */ lppaca_of(dtl->cpu).dtl_enable_mask = dtl_event_mask; - + atomic_inc(&dtl_count); return 0; } @@ -169,6 +169,7 @@ static void dtl_stop(struct dtl *dtl) lppaca_of(dtl->cpu).dtl_enable_mask = 0x0; unregister_dtl(hwcpu); + atomic_dec(&dtl_count); } static u64 dtl_current_index(struct dtl *dtl) -- 2.43.7