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Sat, 1 Mar 2025 18:23:31 +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 3/4] powerpc/perf/hv-gpci: Avoid loading hv-gpci pmu during dump kernel Date: Sat, 1 Mar 2025 23:53:09 +0530 Message-ID: <20250301182310.6832-3-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-GUID: jxOLZagFwwkeLR84Z1JFWWtpscAbjWce X-Proofpoint-ORIG-GUID: SfMvVbUPZXRZT0Hry3qBtkqRh1ICLxBp 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 lowpriorityscore=0 clxscore=1015 priorityscore=1501 spamscore=0 adultscore=0 impostorscore=0 mlxlogscore=999 malwarescore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2502100000 definitions=main-2503010145 hv-gpci pmu driver is intended to get powervm hypervisor system-wide metrics and these are built-in. hv-gpci pmu 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-gpci.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/powerpc/perf/hv-gpci.c b/arch/powerpc/perf/hv-gpci.c index 241551d1282f..e0c3df0a048f 100644 --- a/arch/powerpc/perf/hv-gpci.c +++ b/arch/powerpc/perf/hv-gpci.c @@ -989,6 +989,9 @@ static int hv_gpci_init(void) struct hv_perf_caps caps; struct hv_gpci_request_buffer *arg; + if (is_kdump_kernel() || is_fadump_active()) + return 0; + hv_gpci_assert_offsets_correct(); if (!firmware_has_feature(FW_FEATURE_LPAR)) { -- 2.47.0