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Sat, 1 Mar 2025 18:23:25 GMT Received: from smtprelay04.fra02v.mail.ibm.com ([9.218.2.228]) by ppma13.dal12v.mail.ibm.com (PPS) with ESMTPS id 44yu4kckxm-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 01 Mar 2025 18:23:25 +0000 Received: from smtpav02.fra02v.mail.ibm.com (smtpav02.fra02v.mail.ibm.com [10.20.54.101]) by smtprelay04.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 521INONL34538192 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 1 Mar 2025 18:23:24 GMT Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0876D20043; Sat, 1 Mar 2025 18:23:24 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EF6C120040; Sat, 1 Mar 2025 18:23:20 +0000 (GMT) Received: from li-c439904c-24ed-11b2-a85c-b284a6847472.ibm.com.com (unknown [9.43.6.12]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Sat, 1 Mar 2025 18:23:20 +0000 (GMT) From: Madhavan Srinivasan To: mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu Cc: linuxppc-dev@lists.ozlabs.org, Madhavan Srinivasan Subject: [PATCH v2 1/4] powerpc/perf/core-book3s: Avoid loading platform pmu driver during dump kernel Date: Sat, 1 Mar 2025 23:53:07 +0530 Message-ID: <20250301182310.6832-1-maddy@linux.ibm.com> X-Mailer: git-send-email 2.47.0 X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: hbnrssgDpU04n9KJ57cXMg8HXDwEun48 X-Proofpoint-ORIG-GUID: 0UHH5z4__asnQUrPibC8uGoRzwtl_WKv X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1057,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-03-01_07,2025-02-28_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 mlxlogscore=999 spamscore=0 suspectscore=0 priorityscore=1501 malwarescore=0 adultscore=0 impostorscore=0 mlxscore=0 phishscore=0 bulkscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2502100000 definitions=main-2503010145 Platform pmu driver are built-in and these does not have a commandline parameter to avoid loading them during the kdump kernel. Add check for kdump and fadump kernel to avoids loading them. Signed-off-by: Madhavan Srinivasan --- Changelog v1: - Added more details to commmit message arch/powerpc/perf/core-book3s.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c index 2b79171ee185..9a009dff63b3 100644 --- a/arch/powerpc/perf/core-book3s.c +++ b/arch/powerpc/perf/core-book3s.c @@ -22,6 +22,8 @@ #ifdef CONFIG_PPC64 #include "internal.h" +#include +#include #endif #define BHRB_MAX_ENTRIES 32 @@ -2571,6 +2573,12 @@ static int __init init_ppc64_pmu(void) return 0; } + /* + * If the dump kernel is active, skip loading these drivers + */ + if (is_kdump_kernel() || is_fadump_active()) + return 0; + /* run through all the pmu drivers one at a time */ if (!init_power5_pmu()) return 0; -- 2.47.0