From nobody Sun Feb 8 23:28:46 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A43D0C001DE for ; Wed, 2 Aug 2023 06:37:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231508AbjHBGhK (ORCPT ); Wed, 2 Aug 2023 02:37:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34378 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229607AbjHBGhG (ORCPT ); Wed, 2 Aug 2023 02:37:06 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 90C9F122 for ; Tue, 1 Aug 2023 23:37:05 -0700 (PDT) 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 5CBAFD75; Tue, 1 Aug 2023 23:37:48 -0700 (PDT) Received: from a077893.arm.com (unknown [10.163.53.180]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 4B8FC3F6C4; Tue, 1 Aug 2023 23:37:02 -0700 (PDT) From: Anshuman Khandual To: linux-arm-kernel@lists.infradead.org, suzuki.poulose@arm.com Cc: Anshuman Khandual , Mike Leach , James Clark , Leo Yan , coresight@lists.linaro.org, linux-kernel@vger.kernel.org Subject: [PATCH] coresight: trbe: Directly use ID_AA64DFR0_EL1_TraceBuffer_IMP Date: Wed, 2 Aug 2023 12:06:58 +0530 Message-Id: <20230802063658.1069813-1-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" is_trbe_available() checks for the TRBE support via extracting TraceBuffer field value from ID_AA64DFR0_EL1, and ensures that it is implemented. This replaces the open encoding '0b0001' with 'ID_AA64DFR0_EL1_TraceBuffer_IMP' which is now available via sysreg tools. Functional change is not intended. Cc: Suzuki K Poulose Cc: Mike Leach Cc: James Clark Cc: Leo Yan Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual Reviewed-by: James Clark --- drivers/hwtracing/coresight/coresight-trbe.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/hwtracing/coresight/coresight-trbe.h b/drivers/hwtraci= ng/coresight/coresight-trbe.h index 94e67009848a..ebb9108d8e24 100644 --- a/drivers/hwtracing/coresight/coresight-trbe.h +++ b/drivers/hwtracing/coresight/coresight-trbe.h @@ -24,7 +24,7 @@ static inline bool is_trbe_available(void) unsigned int trbe =3D cpuid_feature_extract_unsigned_field(aa64dfr0, ID_AA64DFR0_EL1_TraceBuffer_SHIFT); =20 - return trbe >=3D 0b0001; + return trbe >=3D ID_AA64DFR0_EL1_TraceBuffer_IMP; } =20 static inline bool is_trbe_enabled(void) --=20 2.25.1