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Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by DS3PEPF000099E2.mail.protection.outlook.com (10.167.17.201) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.7046.17 via Frontend Transport; Thu, 30 Nov 2023 06:23:25 +0000 Received: from BLR-5CG113396H.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.34; Thu, 30 Nov 2023 00:23:08 -0600 From: Ravi Bangoria To: , CC: , , , , , , , , , , Subject: [PATCH v2] perf/x86/amd: Reject branch stack for IBS events Date: Thu, 30 Nov 2023 11:52:46 +0530 Message-ID: <20231130062246.290-1-ravi.bangoria@amd.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS3PEPF000099E2:EE_|SA1PR12MB8597:EE_ X-MS-Office365-Filtering-Correlation-Id: 6b841a0d-ed68-4f23-ab1b-08dbf16cdc51 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Nov 2023 06:23:25.7377 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 6b841a0d-ed68-4f23-ab1b-08dbf16cdc51 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DS3PEPF000099E2.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA1PR12MB8597 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Namhyung Kim The AMD IBS PMU doesn't handle branch stacks, so it should not accept events with brstack. Signed-off-by: Namhyung Kim Signed-off-by: Ravi Bangoria --- v1: https://lore.kernel.org/r/20230602194513.1589179-1-namhyung@kernel.org v1->v2: - Rebase on top of peterz/queue/perf/core arch/x86/events/amd/ibs.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/events/amd/ibs.c b/arch/x86/events/amd/ibs.c index 6911c5399d02..e91970b01d62 100644 --- a/arch/x86/events/amd/ibs.c +++ b/arch/x86/events/amd/ibs.c @@ -287,6 +287,9 @@ static int perf_ibs_init(struct perf_event *event) if (config & ~perf_ibs->config_mask) return -EINVAL; =20 + if (has_branch_stack(event)) + return -EOPNOTSUPP; + ret =3D validate_group(event); if (ret) return ret; --=20 2.34.1