Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751901AbdFEMbm (ORCPT ); Mon, 5 Jun 2017 08:31:42 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:52572 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751834AbdFEMbl (ORCPT ); Mon, 5 Jun 2017 08:31:41 -0400 From: Anju T Sudhakar To: mpe@ellerman.id.au Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, ego@linux.vnet.ibm.com, bsingharora@gmail.com, anton@samba.org, sukadev@linux.vnet.ibm.com, mikey@neuling.org, stewart@linux.vnet.ibm.com, dja@axtens.net, eranian@google.com, hemant@linux.vnet.ibm.com, maddy@linux.vnet.ibm.com, anju@linux.vnet.ibm.com Subject: [PATCH v9 02/10] powerpc/powernv: Autoload IMC device driver module Date: Mon, 5 Jun 2017 18:00:13 +0530 X-Mailer: git-send-email 2.7.4 In-Reply-To: <1496665818-543-1-git-send-email-anju@linux.vnet.ibm.com> References: <1496665818-543-1-git-send-email-anju@linux.vnet.ibm.com> X-TM-AS-MML: disable x-cbid: 17060512-0004-0000-0000-0000020DE4A8 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17060512-0005-0000-0000-00000A05054A Message-Id: <1496665818-543-3-git-send-email-anju@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-06-05_05:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=1 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1703280000 definitions=main-1706050237 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5519 Lines: 176 Code to create platform device for the IMC counters. Paltform devices are created based on the IMC compatibility string. New Config flag "CONFIG_HV_PERF_IMC_CTRS" add to contain the IMC counter changes. Signed-off-by: Anju T Sudhakar Signed-off-by: Hemant Kumar Signed-off-by: Madhavan Srinivasan --- arch/powerpc/platforms/powernv/Kconfig | 10 +++++ arch/powerpc/platforms/powernv/Makefile | 1 + arch/powerpc/platforms/powernv/opal-imc.c | 73 +++++++++++++++++++++++++++++++ arch/powerpc/platforms/powernv/opal.c | 18 ++++++++ 4 files changed, 102 insertions(+) create mode 100644 arch/powerpc/platforms/powernv/opal-imc.c diff --git a/arch/powerpc/platforms/powernv/Kconfig b/arch/powerpc/platforms/powernv/Kconfig index 6a6f4ef..543c6cd 100644 --- a/arch/powerpc/platforms/powernv/Kconfig +++ b/arch/powerpc/platforms/powernv/Kconfig @@ -30,3 +30,13 @@ config OPAL_PRD help This enables the opal-prd driver, a facility to run processor recovery diagnostics on OpenPower machines + +config HV_PERF_IMC_CTRS + bool "Hypervisor supplied In Memory Collection PMU events (Nest & Core)" + default y + depends on PERF_EVENTS && PPC_POWERNV + help + Enable access to hypervisor supplied in-memory collection counters + in perf. IMC counters are available from Power9 systems. + + If unsure, select Y. diff --git a/arch/powerpc/platforms/powernv/Makefile b/arch/powerpc/platforms/powernv/Makefile index b5d98cb..715e531 100644 --- a/arch/powerpc/platforms/powernv/Makefile +++ b/arch/powerpc/platforms/powernv/Makefile @@ -12,3 +12,4 @@ obj-$(CONFIG_PPC_SCOM) += opal-xscom.o obj-$(CONFIG_MEMORY_FAILURE) += opal-memory-errors.o obj-$(CONFIG_TRACEPOINTS) += opal-tracepoints.o obj-$(CONFIG_OPAL_PRD) += opal-prd.o +obj-$(CONFIG_HV_PERF_IMC_CTRS) += opal-imc.o diff --git a/arch/powerpc/platforms/powernv/opal-imc.c b/arch/powerpc/platforms/powernv/opal-imc.c new file mode 100644 index 0000000..5b1045c --- /dev/null +++ b/arch/powerpc/platforms/powernv/opal-imc.c @@ -0,0 +1,73 @@ +/* + * OPAL IMC interface detection driver + * Supported on POWERNV platform + * + * Copyright (C) 2017 Madhavan Srinivasan, IBM Corporation. + * (C) 2017 Anju T Sudhakar, IBM Corporation. + * (C) 2017 Hemant K Shaw, IBM Corporation. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static int opal_imc_counters_probe(struct platform_device *pdev) +{ + struct device_node *imc_dev = NULL; + + if (!pdev || !pdev->dev.of_node) + return -ENODEV; + + /* + * Check whether this is kdump kernel. If yes, just return. + */ + if (is_kdump_kernel()) + return -ENODEV; + + imc_dev = pdev->dev.of_node; + if (!imc_dev) + return -ENODEV; + + return 0; +} + +static const struct of_device_id opal_imc_match[] = { + { .compatible = IMC_DTB_COMPAT }, + {}, +}; + +static struct platform_driver opal_imc_driver = { + .driver = { + .name = "opal-imc-counters", + .of_match_table = opal_imc_match, + }, + .probe = opal_imc_counters_probe, +}; + +MODULE_DEVICE_TABLE(of, opal_imc_match); +module_platform_driver(opal_imc_driver); +MODULE_DESCRIPTION("PowerNV OPAL IMC driver"); +MODULE_LICENSE("GPL"); diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c index 59684b4..fbdca25 100644 --- a/arch/powerpc/platforms/powernv/opal.c +++ b/arch/powerpc/platforms/powernv/opal.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include #include @@ -30,6 +31,7 @@ #include #include #include +#include #include "powernv.h" @@ -705,6 +707,17 @@ static void opal_pdev_init(const char *compatible) of_platform_device_create(np, NULL, NULL); } +#ifdef CONFIG_HV_PERF_IMC_CTRS +static void __init opal_imc_init_dev(void) +{ + struct device_node *np; + + np = of_find_compatible_node(NULL, NULL, IMC_DTB_COMPAT); + if (np) + of_platform_device_create(np, NULL, NULL); +} +#endif + static int kopald(void *unused) { unsigned long timeout = msecs_to_jiffies(opal_heartbeat) + 1; @@ -778,6 +791,11 @@ static int __init opal_init(void) /* Setup a heatbeat thread if requested by OPAL */ opal_init_heartbeat(); +#ifdef CONFIG_HV_PERF_IMC_CTRS + /* Detect IMC pmu counters support and create PMUs */ + opal_imc_init_dev(); +#endif + /* Create leds platform devices */ leds = of_find_node_by_path("/ibm,opal/leds"); if (leds) { -- 2.7.4