From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9DF93C79FB7 for ; Wed, 9 Sep 2026 16:23:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=DvlRGZ+qYfkTRTsFESlVgI7yuiHg6UvYFOoy1Li7X3c=; b=GU6AtH0Ju4RndDwBOS5KOByF4P PWj6qWF200ZKoPTjmSjdHMM45GczXL+lS0th+Hv649H4v+lA2BvsGBx70ergT2mFKynLitAIlYlLm 2OZjRTYvQVoKZcg0NeBn1AC8Glqc72mpychXbJ4U3J7djTUvCNVErl+iO+ZQtuMo1mVdLZRrHbZnL k5+nvxj4s51Y9GMKGjqiA1o6f1ksNG97v4pRXwDbQCXrILJlOST+l/bsH56Sf/DgYnwiGsBbS+Kbo 9ZyWcxm3kNJntQn+xv7v8of8x3hr4QA198dxKOuL7r7et1gzK8WEwGGHeaUv9u/u0gXZwjiE4ez9c WxqxH59A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x4L4u-0000000CIfV-2vJ6; Wed, 09 Sep 2026 16:23:16 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x4L4s-0000000CIeK-3XMt for linux-arm-kernel@bombadil.infradead.org; Wed, 09 Sep 2026 16:23:14 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Transfer-Encoding:MIME-Version :Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:In-Reply-To:References; bh=DvlRGZ+qYfkTRTsFESlVgI7yuiHg6UvYFOoy1Li7X3c=; b=C2IYWiSUdfcefBO3tAAVVtScbA WJRrYZUuZCczzV9hP7VQJRSVAw4PdVuzpofLUZOOcET0K12OImrzeVN1xt4cTyi+/sq8lVGp8ulod ApvOzsKPTStGpmPVdS+1RWEGPsBnxr9wBtpNivqt9h2po6swIbWBxSwbsU91jHaL299MdLm8ZDO1+ NxznqDbaVJAMXHUkzG/s/1/g/6y3bakaGaoeJkiidjGuBej3tcnt1LCFX/nEUui3PVy30cGBxLP1U Tov/DC+uY6kGindEtgARCt7tryejFSFiA8ywrj+agBoINP9qdvTtUixIq7b+P7wKZrNg/Pdp3IQkA eEpUTZHA==; Received: from foss.arm.com ([217.140.110.172]) by desiato.infradead.org with esmtp (Exim 4.99.2 #2 (Red Hat Linux)) id 1x4L4l-00000001Qyh-3uk5 for linux-arm-kernel@lists.infradead.org; Wed, 09 Sep 2026 16:23:13 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id D5A441570; Wed, 9 Sep 2026 09:23:01 -0700 (PDT) Received: from e121345-lin.cambridge.arm.com (e121345-lin.cambridge.arm.com [10.2.212.23]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id EA0613F7B4; Wed, 9 Sep 2026 09:23:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1788970985; bh=Lu6PqQ98ZIcVokP8zCJPl+McNFYlpvai7wV1clZrQ6s=; h=From:To:Cc:Subject:Date:From; b=mvEyKiaIe8AagPR0cTpqCEXuig/9ATEtebclddS/6kbds0a4oGrXryXVKG1vTsnuK hPQRM7Zd9IuH8+fWsHJziT3kfUOudFOQzHWxPMf13xsyjB1yPFkiCuPgRUPM9OT+My 2z5zngyq1GMrxake/l4RyoJlTC2C9jE+7gyYU5/o= From: Robin Murphy To: will@kernel.org Cc: mark.rutland@arm.com, linux-perf-users@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH] perf/arm_cspmu: Add Arm system PMU Date: Wed, 9 Sep 2026 17:23:00 +0100 Message-ID: <84a65061841c8870375ee6b0621dd3f61651763d.1788970980.git.robin.murphy@arm.com> X-Mailer: git-send-email 2.54.0.dirty MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260909_172308_354908_977A27C1 X-CRM114-Status: GOOD ( 17.99 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Arm's latest Compute Subsystems and SoCs are using a common PMU block in various places which can mostly just be driven as a generic 64-bit CoreSight PMU, but does have an IMP-DEF register for additional filtering. The details of event and filter encodings depend on the particular PMU instance, so are left to the higher level Arm Telemetry Solution tooling. Signed-off-by: Robin Murphy --- drivers/perf/arm_cspmu/Kconfig | 7 +++ drivers/perf/arm_cspmu/Makefile | 1 + drivers/perf/arm_cspmu/arm_cspmu.c | 7 +++ drivers/perf/arm_cspmu/arm_cspmu.h | 1 + drivers/perf/arm_cspmu/arm_syspmu.c | 67 +++++++++++++++++++++++++++++ 5 files changed, 83 insertions(+) create mode 100644 drivers/perf/arm_cspmu/arm_syspmu.c diff --git a/drivers/perf/arm_cspmu/Kconfig b/drivers/perf/arm_cspmu/Kconfig index 004c1c2ee2ad..d44916312c77 100644 --- a/drivers/perf/arm_cspmu/Kconfig +++ b/drivers/perf/arm_cspmu/Kconfig @@ -28,6 +28,13 @@ config AMPERE_CORESIGHT_PMU_ARCH_SYSTEM_PMU In the first phase, the driver enables support on MCU PMU used in AmpereOne SoC family. +config ARM_SYSTEM_PMU + tristate "Arm System PMU" + depends on ARM_CORESIGHT_PMU_ARCH_SYSTEM_PMU + help + Support additional event filtering attributes for the CoreSight-based + PMU blocks found in various parts of Arm Compute Subsystems and SoCs. + config ARM_BMU tristate "ARM Bus Monitor Unit" depends on ARM64 || COMPILE_TEST diff --git a/drivers/perf/arm_cspmu/Makefile b/drivers/perf/arm_cspmu/Makefile index 0bb4d510fc49..c9c42227a3ad 100644 --- a/drivers/perf/arm_cspmu/Makefile +++ b/drivers/perf/arm_cspmu/Makefile @@ -8,6 +8,7 @@ arm_cspmu_module-y := arm_cspmu.o obj-$(CONFIG_NVIDIA_CORESIGHT_PMU_ARCH_SYSTEM_PMU) += nvidia_cspmu.o obj-$(CONFIG_AMPERE_CORESIGHT_PMU_ARCH_SYSTEM_PMU) += ampere_cspmu.o +obj-$(CONFIG_ARM_SYSTEM_PMU) += arm_syspmu.o obj-$(CONFIG_ARM_BMU) += arm-bmu.o obj-$(CONFIG_ARM_DMC750) += arm-dmc750.o diff --git a/drivers/perf/arm_cspmu/arm_cspmu.c b/drivers/perf/arm_cspmu/arm_cspmu.c index 912f03ce3ef5..9f298ea1a974 100644 --- a/drivers/perf/arm_cspmu/arm_cspmu.c +++ b/drivers/perf/arm_cspmu/arm_cspmu.c @@ -358,6 +358,13 @@ static struct arm_cspmu_impl_match impl_match[] = { .module = NULL, .impl_init_ops = NULL, }, + { + .module_name = "arm_syspmu", + .pmiidr_val = ARM_CSPMU_IMPL_ID_ARM, + .pmiidr_mask = PMIIDR_IMPLEMENTER, + .module = NULL, + .impl_init_ops = NULL, + }, { .module_name = "ampere_cspmu", .pmiidr_val = ARM_CSPMU_IMPL_ID_AMPERE, diff --git a/drivers/perf/arm_cspmu/arm_cspmu.h b/drivers/perf/arm_cspmu/arm_cspmu.h index c4058d602477..03e34692a965 100644 --- a/drivers/perf/arm_cspmu/arm_cspmu.h +++ b/drivers/perf/arm_cspmu/arm_cspmu.h @@ -149,6 +149,7 @@ /* JEDEC-assigned JEP106 identification code */ #define ARM_CSPMU_IMPL_ID_NVIDIA 0x36B +#define ARM_CSPMU_IMPL_ID_ARM 0x43B #define ARM_CSPMU_IMPL_ID_AMPERE 0xA16 /* PMDEVARCH */ diff --git a/drivers/perf/arm_cspmu/arm_syspmu.c b/drivers/perf/arm_cspmu/arm_syspmu.c new file mode 100644 index 000000000000..ac234768a2f8 --- /dev/null +++ b/drivers/perf/arm_cspmu/arm_syspmu.c @@ -0,0 +1,67 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include + +#include "arm_cspmu.h" + +#define PMEVFILT3R 0x200 + +static struct attribute *arm_syspmu_format_attrs[] = { + ARM_CSPMU_FORMAT_EVENT_ATTR, + ARM_CSPMU_FORMAT_FILTER_ATTR, + ARM_CSPMU_FORMAT_FILTER2_ATTR, + ARM_CSPMU_FORMAT_ATTR(filter3, "config3:0-63"), + NULL, +}; + +static struct attribute **arm_syspmu_get_format_attrs(const struct arm_cspmu *cspmu) +{ + return devm_kmemdup(cspmu->dev, arm_syspmu_format_attrs, + sizeof(arm_syspmu_format_attrs), GFP_KERNEL); +} + +static void arm_syspmu_set_ev_filter(struct arm_cspmu *cspmu, + const struct perf_event *event) +{ + u32 offset = 8 * event->hw.idx; + + writeq(event->attr.config1, cspmu->base0 + PMEVFILTR + offset); + writeq(event->attr.config2, cspmu->base0 + PMEVFILT2R + offset); + writeq(event->attr.config3, cspmu->base0 + PMEVFILT3R + offset); +} + +static int arm_syspmu_init_ops(struct arm_cspmu *cspmu) +{ + switch (FIELD_GET(PMIIDR_PRODUCTID, cspmu->impl.pmiidr)) { + case 0x9c3: + cspmu->impl.ops.set_ev_filter = arm_syspmu_set_ev_filter; + cspmu->impl.ops.get_format_attrs = arm_syspmu_get_format_attrs; + break; + default: + break; + } + return 0; +} + +static const struct arm_cspmu_impl_match arm_syspmu_param = { + .pmiidr_val = ARM_CSPMU_IMPL_ID_ARM, + .module = THIS_MODULE, + .impl_init_ops = arm_syspmu_init_ops +}; + +static int __init arm_syspmu_init(void) +{ + return arm_cspmu_impl_register(&arm_syspmu_param); +} + +static void __exit arm_syspmu_exit(void) +{ + arm_cspmu_impl_unregister(&arm_syspmu_param); +} + +module_init(arm_syspmu_init); +module_exit(arm_syspmu_exit); + +MODULE_DESCRIPTION("Arm System PMU Driver"); +MODULE_LICENSE("GPL"); -- 2.54.0.dirty