From patchwork Thu Oct 12 19:48:52 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeremy Linton X-Patchwork-Id: 115668 Delivered-To: patch@linaro.org Received: by 10.140.22.163 with SMTP id 32csp2308917qgn; Thu, 12 Oct 2017 12:49:22 -0700 (PDT) X-Google-Smtp-Source: AOwi7QAYqxK7jP/po3raMAT/482t6Th0DAhITkE/UOSZR7ZHtmySss9CZtFpYJMp2LZMf5yZoQX1 X-Received: by 10.101.72.199 with SMTP id o7mr1100544pgs.450.1507837761915; Thu, 12 Oct 2017 12:49:21 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1507837761; cv=none; d=google.com; s=arc-20160816; b=Y0Bkw0ECrNjdpaQxZalk0enPmlAh5zfOKSWAZqbbdTj/peOPFMX3ji8zVChPZlQYTV VLKxaEF/cuwX9/HEZ4SbgabDl801n+G6ZZdRRUrQ3ET4TWSyL3CTv0LRjrt8FgcjZyXg CPFcNlhtm8Ny7wxvjyGRtrUW1kcw74ybx02Q6usBn/RlwEpvQlqWRrWJVw6VE2g/nqFo aKaAnzFzTCFw4wzF5W3kjeSS1t/wolUlCSfIGVjwiim8sWUPynluIRm0lN1Zis4KDvUk z5dvTsgqiN9Kda9KrwbSk+0/yXMjaeBgPqozofNk7PQqGNGZ0lgBK8x0kal7QjpCdcoa 2vIQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:references:in-reply-to:message-id:date :subject:cc:to:from:arc-authentication-results; bh=ec4HI2UkCxRxYbbxGksjxK5br9qEOZ1exeVky+4NOGk=; b=Xg6NWbR4qAI8b24ixc/GzPj6zYgVfhItvfX27S2GsBVE0GEY1hpUwqlvyCVnLYfpM2 z81d4UFLR81GoY6h4EvLbu99toqMEn/BVN+rO/w9nEolNhvV8iFAWN+d1ACaluLacBgS bLXuJkYfDSxY55JJNBAL7zaCDIJWEQXqMAqgbev2LpgVOmAXOMgIGXjCv1qz+FFPFbsJ 3GlwzW5zAN6E5NtNtcQutDmWk9hiiZ2eqB2Cqy7Pr01dwBGdthY3THN21CTL51AjOeHA MMI4uttceNPYraAZc6ZfSrWYtGXN6OjTAbSWXw17P84ZJ4zhq5iDzjIiGBSeyTovdzls M7BQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id d22si13296385pli.461.2017.10.12.12.49.21; Thu, 12 Oct 2017 12:49:21 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754604AbdJLTtU (ORCPT + 27 others); Thu, 12 Oct 2017 15:49:20 -0400 Received: from foss.arm.com ([217.140.101.70]:51650 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753209AbdJLTtR (ORCPT ); Thu, 12 Oct 2017 15:49:17 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 00C4E164F; Thu, 12 Oct 2017 12:49:17 -0700 (PDT) Received: from beelzebub.austin.arm.com (beelzebub.austin.arm.com [10.118.12.119]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 247993F58C; Thu, 12 Oct 2017 12:49:16 -0700 (PDT) From: Jeremy Linton To: linux-acpi@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, sudeep.holla@arm.com, hanjun.guo@linaro.org, lorenzo.pieralisi@arm.com, rjw@rjwysocki.net, will.deacon@arm.com, catalin.marinas@arm.com, gregkh@linuxfoundation.org, viresh.kumar@linaro.org, mark.rutland@arm.com, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, jhugo@codeaurora.org, wangxiongfeng2@huawei.com, Jonathan.Zhang@cavium.com, ahs3@redhat.com, Jayachandran.Nair@cavium.com, austinwc@codeaurora.org, Jeremy Linton Subject: [PATCH v3 3/7] drivers: base: cacheinfo: arm64: Add support for ACPI based firmware tables Date: Thu, 12 Oct 2017 14:48:52 -0500 Message-Id: <20171012194856.13844-4-jeremy.linton@arm.com> X-Mailer: git-send-email 2.13.5 In-Reply-To: <20171012194856.13844-1-jeremy.linton@arm.com> References: <20171012194856.13844-1-jeremy.linton@arm.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The /sys cache entries should support ACPI/PPTT generated cache topology information. Lets detect ACPI systems and call an arch specific cache_setup_acpi() routine to update the hardware probed cache topology. For arm64, if ACPI is enabled, determine the max number of cache levels and populate them using a PPTT table if one is available. Signed-off-by: Jeremy Linton --- arch/arm64/kernel/cacheinfo.c | 23 ++++++++++++++++++----- drivers/acpi/pptt.c | 1 + drivers/base/cacheinfo.c | 17 +++++++++++------ include/linux/cacheinfo.h | 11 +++++++++-- 4 files changed, 39 insertions(+), 13 deletions(-) -- 2.13.5 diff --git a/arch/arm64/kernel/cacheinfo.c b/arch/arm64/kernel/cacheinfo.c index 380f2e2fbed5..2e2cf0d312ba 100644 --- a/arch/arm64/kernel/cacheinfo.c +++ b/arch/arm64/kernel/cacheinfo.c @@ -17,6 +17,7 @@ * along with this program. If not, see . */ +#include #include #include @@ -44,9 +45,17 @@ static void ci_leaf_init(struct cacheinfo *this_leaf, this_leaf->type = type; } +#ifndef CONFIG_ACPI +int acpi_find_last_cache_level(unsigned int cpu) +{ + /*ACPI kernels should be built with PPTT support*/ + return 0; +} +#endif + static int __init_cache_level(unsigned int cpu) { - unsigned int ctype, level, leaves, of_level; + unsigned int ctype, level, leaves, fw_level; struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); for (level = 1, leaves = 0; level <= MAX_CACHE_LEVEL; level++) { @@ -59,15 +68,19 @@ static int __init_cache_level(unsigned int cpu) leaves += (ctype == CACHE_TYPE_SEPARATE) ? 2 : 1; } - of_level = of_find_last_cache_level(cpu); - if (level < of_level) { + if (acpi_disabled) + fw_level = of_find_last_cache_level(cpu); + else + fw_level = acpi_find_last_cache_level(cpu); + + if (level < fw_level) { /* * some external caches not specified in CLIDR_EL1 * the information may be available in the device tree * only unified external caches are considered here */ - leaves += (of_level - level); - level = of_level; + leaves += (fw_level - level); + level = fw_level; } this_cpu_ci->num_levels = level; diff --git a/drivers/acpi/pptt.c b/drivers/acpi/pptt.c index c86715fed4a7..b5c6de37e328 100644 --- a/drivers/acpi/pptt.c +++ b/drivers/acpi/pptt.c @@ -355,6 +355,7 @@ static void update_cache_properties(struct cacheinfo *this_leaf, struct acpi_pptt_cache *found_cache, struct acpi_pptt_processor *cpu_node) { + this_leaf->firmware_node = cpu_node; if (found_cache->flags & ACPI_PPTT_SIZE_PROPERTY_VALID) this_leaf->size = found_cache->size; if (found_cache->flags & ACPI_PPTT_LINE_SIZE_VALID) diff --git a/drivers/base/cacheinfo.c b/drivers/base/cacheinfo.c index eb3af2739537..8eca279e50d1 100644 --- a/drivers/base/cacheinfo.c +++ b/drivers/base/cacheinfo.c @@ -86,7 +86,7 @@ static int cache_setup_of_node(unsigned int cpu) static inline bool cache_leaves_are_shared(struct cacheinfo *this_leaf, struct cacheinfo *sib_leaf) { - return sib_leaf->of_node == this_leaf->of_node; + return sib_leaf->firmware_node == this_leaf->firmware_node; } /* OF properties to query for a given cache type */ @@ -215,6 +215,11 @@ static inline bool cache_leaves_are_shared(struct cacheinfo *this_leaf, } #endif +int __weak cache_setup_acpi(unsigned int cpu) +{ + return -ENOTSUPP; +} + static int cache_shared_cpu_map_setup(unsigned int cpu) { struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); @@ -225,11 +230,11 @@ static int cache_shared_cpu_map_setup(unsigned int cpu) if (this_cpu_ci->cpu_map_populated) return 0; - if (of_have_populated_dt()) + if (!acpi_disabled) + ret = cache_setup_acpi(cpu); + else if (of_have_populated_dt()) ret = cache_setup_of_node(cpu); - else if (!acpi_disabled) - /* No cache property/hierarchy support yet in ACPI */ - ret = -ENOTSUPP; + if (ret) return ret; @@ -286,7 +291,7 @@ static void cache_shared_cpu_map_remove(unsigned int cpu) static void cache_override_properties(unsigned int cpu) { - if (of_have_populated_dt()) + if (acpi_disabled && of_have_populated_dt()) return cache_of_override_properties(cpu); } diff --git a/include/linux/cacheinfo.h b/include/linux/cacheinfo.h index 6a524bf6a06d..d1e9b8e01981 100644 --- a/include/linux/cacheinfo.h +++ b/include/linux/cacheinfo.h @@ -36,6 +36,9 @@ enum cache_type { * @of_node: if devicetree is used, this represents either the cpu node in * case there's no explicit cache node or the cache node itself in the * device tree + * @firmware_node: Shared with of_node. When not using DT, this may contain + * pointers to other firmware based values. Particularly ACPI/PPTT + * unique values. * @disable_sysfs: indicates whether this node is visible to the user via * sysfs or not * @priv: pointer to any private data structure specific to particular @@ -64,8 +67,10 @@ struct cacheinfo { #define CACHE_ALLOCATE_POLICY_MASK \ (CACHE_READ_ALLOCATE | CACHE_WRITE_ALLOCATE) #define CACHE_ID BIT(4) - - struct device_node *of_node; + union { + struct device_node *of_node; + void *firmware_node; + }; bool disable_sysfs; void *priv; }; @@ -98,6 +103,8 @@ int func(unsigned int cpu) \ struct cpu_cacheinfo *get_cpu_cacheinfo(unsigned int cpu); int init_cache_level(unsigned int cpu); int populate_cache_leaves(unsigned int cpu); +int cache_setup_acpi(unsigned int cpu); +int acpi_find_last_cache_level(unsigned int cpu); const struct attribute_group *cache_get_priv_group(struct cacheinfo *this_leaf);