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Mon, 13 Jan 2020 06:38:55 +0000 From: Yash Shah To: paul.walmsley@sifive.com, palmer@dabbelt.com Cc: aou@eecs.berkeley.edu, allison@lohutok.net, alexios.zavras@intel.com, gregkh@linuxfoundation.org, tglx@linutronix.de, bp@suse.de, anup@brainfault.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, sachin.ghadi@sifive.com, Yash Shah Subject: [PATCH v3 0/2] cacheinfo support to read no. of L2 cache ways enabled Date: Mon, 13 Jan 2020 12:08:18 +0530 Message-Id: <1578897500-23897-1-git-send-email-yash.shah@sifive.com> X-Mailer: git-send-email 2.7.4 Content-Type: text/plain X-ClientProxiedBy: PN1PR01CA0081.INDPRD01.PROD.OUTLOOK.COM (2603:1096:c00:1::21) To CH2PR13MB3368.namprd13.prod.outlook.com (2603:10b6:610:2c::26) MIME-Version: 1.0 Received: from dhananjayk-PowerEdge-R620.open-silicon.com (114.143.65.226) by PN1PR01CA0081.INDPRD01.PROD.OUTLOOK.COM (2603:1096:c00:1::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.20.2623.11 via Frontend Transport; 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X-Microsoft-Antispam-Message-Info: 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 X-OriginatorOrg: sifive.com X-MS-Exchange-CrossTenant-Network-Message-Id: a5a3c56c-5f02-4a32-a2b5-08d797f342ef X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Jan 2020 06:38:55.4931 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 22f88e9d-ae0d-4ed9-b984-cdc9be1529f1 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: fZ16dDxNVcP5GSAePV7coctCFPvckxHHozeCury/L5S45WvxnM6mWYoBsw3CvXLeKmKBvhLJgwhA9LgPIIiFyg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH2PR13MB3317 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The patchset includes 2 patches. Patch 1 implements cache_get_priv_group which make use of a generic ops structure to return a private attribute group for custom cacheinfo. Patch 2 implements a private attribute named "number_of_ways_enabled" in the cacheinfo framework. Reading this attribute returns the number of L2 cache ways enabled at runtime, This patchset is based on Linux v5.5-rc6 and tested on HiFive Unleashed board. v3 vs v2: - As per Anup Patel's suggestion[0], implement a new approach which uses generic ops structure. Hence addition of patch 1 to this series and corresponding changes to patch 2. - Dropped "riscv: dts: Add DT support for SiFive L2 cache controller" patch since it is already merged - Rebased on Linux v5.5-rc6 Changes in v2: - Rebase the series on v5.5-rc3 - Remove the reserved-memory node from DT [0]: https://lore.kernel.org/linux-riscv/CAAhSdy0CXde5s_ya=4YvmA4UQ5f5gLU-Z_FaOr8LPni+s_615Q@mail.gmail.com/ Yash Shah (2): riscv: cacheinfo: Implement cache_get_priv_group with a generic ops structure riscv: Add support to determine no. of L2 cache way enabled arch/riscv/include/asm/cacheinfo.h | 15 ++++++++++++++ arch/riscv/kernel/cacheinfo.c | 17 ++++++++++++++++ drivers/soc/sifive/sifive_l2_cache.c | 38 ++++++++++++++++++++++++++++++++++++ include/soc/sifive/sifive_l2_cache.h | 2 ++ 4 files changed, 72 insertions(+) create mode 100644 arch/riscv/include/asm/cacheinfo.h -- 2.7.4