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Sat, 1 Mar 2025 18:23:25 +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 2/4] powerpc/perf/hv-24x7: Avoid loading hv-24x7 during dump kernel Date: Sat, 1 Mar 2025 23:53:08 +0530 Message-ID: <20250301182310.6832-2-maddy@linux.ibm.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20250301182310.6832-1-maddy@linux.ibm.com> References: <20250301182310.6832-1-maddy@linux.ibm.com> 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-ORIG-GUID: QrH81I06_DkQyfWHyEUsJKfwA6oxPsD8 X-Proofpoint-GUID: 9t_GxmiRql_pk7iOznr-siAhQJl3XFTX 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 mlxscore=0 suspectscore=0 bulkscore=0 spamscore=0 priorityscore=1501 phishscore=0 impostorscore=0 malwarescore=0 lowpriorityscore=0 mlxlogscore=999 adultscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2502100000 definitions=main-2503010145 hv-24x7 pmu driver are intended to get system-wide resourse metrics and these are built-in. hv-24x7 pmu does not have commandline option to disable them. 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/hv-24x7.c | 3 +++ arch/powerpc/perf/hv-common.h | 2 ++ 2 files changed, 5 insertions(+) diff --git a/arch/powerpc/perf/hv-24x7.c b/arch/powerpc/perf/hv-24x7.c index d400fa391c27..3a626cd8cf54 100644 --- a/arch/powerpc/perf/hv-24x7.c +++ b/arch/powerpc/perf/hv-24x7.c @@ -1698,6 +1698,9 @@ static int hv_24x7_init(void) unsigned int pvr = mfspr(SPRN_PVR); struct hv_perf_caps caps; + if (is_kdump_kernel() || is_fadump_active()) + return 0; + if (!firmware_has_feature(FW_FEATURE_LPAR)) { pr_debug("not a virtualized system, not enabling\n"); return -ENODEV; diff --git a/arch/powerpc/perf/hv-common.h b/arch/powerpc/perf/hv-common.h index 2cce17bc321c..a4c062d2264e 100644 --- a/arch/powerpc/perf/hv-common.h +++ b/arch/powerpc/perf/hv-common.h @@ -4,6 +4,8 @@ #include #include +#include +#include struct hv_perf_caps { u16 version; -- 2.47.0