From patchwork Thu Jan 7 12:38:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Suzuki K Poulose X-Patchwork-Id: 12004007 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 21C63C433E0 for ; Thu, 7 Jan 2021 12:45:49 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 99F9A23370 for ; Thu, 7 Jan 2021 12:45:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 99F9A23370 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=WuiBAJQ/gv9nTzjR1xhQXKYKdMi4yIfM1mfPxE6jcfI=; b=DT7inI3hRdBBwlKegG6dBW8lq iogHiQOnTH1zNtOkTC0QtsH1bjnYC0MvM83ttyXieEyvc6FrJBZjRy5zQ6YX2K63gvxvMB4wi4/B2 1zAAjxJw6HlQyxqApshhVuZiqiWre552Larv9Mown+QB1JDoaSk3pq+coWgWGdX/nC/iHM0H1o0Pw ZVvWMzvW6J3w8A8gjy6kTipgurTGKZB/jhNohOTR3ISvmX72Lnff1Q9yX941xsef1VTsmpqdxUtng k44Oix6czqTfa+cQ5eSrcOOqVjzUIFG9vxW5ZC31AdJ5bzstAO40pH/GDl7D6HMHRTEO2P0bG87st F54g18yFA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kxUdo-00006O-MS; Thu, 07 Jan 2021 12:43:48 +0000 Received: from foss.arm.com ([217.140.110.172]) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kxUZn-0006Rz-F2 for linux-arm-kernel@lists.infradead.org; Thu, 07 Jan 2021 12:39:45 +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 CAE8F1500; Thu, 7 Jan 2021 04:39:38 -0800 (PST) Received: from ewhatever.cambridge.arm.com (ewhatever.cambridge.arm.com [10.1.197.1]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id B0ED53F719; Thu, 7 Jan 2021 04:39:37 -0800 (PST) From: Suzuki K Poulose To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v6 18/26] coresight: etm4x: Expose trcdevarch via sysfs Date: Thu, 7 Jan 2021 12:38:51 +0000 Message-Id: <20210107123859.674252-19-suzuki.poulose@arm.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20210107123859.674252-1-suzuki.poulose@arm.com> References: <20210107123859.674252-1-suzuki.poulose@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210107_073939_655210_655B3570 X-CRM114-Status: GOOD ( 12.08 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mathieu.poirier@linaro.org, anshuman.khandual@arm.com, coresight@lists.linaro.org, Suzuki K Poulose , linux-kernel@vger.kernel.org, leo.yan@linaro.org, mike.leach@linaro.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Expose the TRCDEVARCH register via the sysfs for component detection. Given that the TRCIDR1 may not completely identify the ETM component and instead need to use TRCDEVARCH, expose this via sysfs for tools to use it for identification. Cc: Mike Leach Reviewed-by: Mathieu Poirier Signed-off-by: Suzuki K Poulose --- Changes since v5: - Move the trcdevarch to mgmt/ instead of the trcidr (Mike L) - Add sysfs documentation for the new register (Mike L) --- .../ABI/testing/sysfs-bus-coresight-devices-etm4x | 8 ++++++++ drivers/hwtracing/coresight/coresight-etm4x-sysfs.c | 2 ++ 2 files changed, 10 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x index 881f0cd99ce4..8e53a32f8150 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x @@ -371,6 +371,14 @@ Contact: Mathieu Poirier Description: (Read) Print the content of the Device ID Register (0xFC8). The value is taken directly from the HW. +What: /sys/bus/coresight/devices/etm/mgmt/trcdevarch +Date: January 2021 +KernelVersion: 5.12 +Contact: Mathieu Poirier +Description: (Read) Print the content of the Device Architecture Register + (offset 0xFBC). The value is taken directly read + from the HW. + What: /sys/bus/coresight/devices/etm/mgmt/trcdevtype Date: April 2015 KernelVersion: 4.01 diff --git a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c index 009818675928..b590b042dca3 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c +++ b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c @@ -2357,6 +2357,7 @@ coresight_etm4x_cross_read(trclsr, TRCLSR); coresight_etm4x_cross_read(trcauthstatus, TRCAUTHSTATUS); coresight_etm4x_cross_read(trcdevid, TRCDEVID); coresight_etm4x_cross_read(trcdevtype, TRCDEVTYPE); +coresight_etm4x_cross_read(trcdevarch, TRCDEVARCH); coresight_etm4x_cross_read(trcpidr0, TRCPIDR0); coresight_etm4x_cross_read(trcpidr1, TRCPIDR1); coresight_etm4x_cross_read(trcpidr2, TRCPIDR2); @@ -2375,6 +2376,7 @@ static struct attribute *coresight_etmv4_mgmt_attrs[] = { &dev_attr_trcauthstatus.attr, &dev_attr_trcdevid.attr, &dev_attr_trcdevtype.attr, + &dev_attr_trcdevarch.attr, &dev_attr_trcpidr0.attr, &dev_attr_trcpidr1.attr, &dev_attr_trcpidr2.attr,