From patchwork Tue Sep 19 18:47:48 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeremy Linton X-Patchwork-Id: 113054 Delivered-To: patch@linaro.org Received: by 10.140.106.117 with SMTP id d108csp5259404qgf; Tue, 19 Sep 2017 11:48:19 -0700 (PDT) X-Google-Smtp-Source: AOwi7QAdobfKxxdpCJoWOFC6Y+kfZltO+KRWI9baJ/PHNidF0ZbdYdb8C+1c1oGGRfuCxgVuO3w3 X-Received: by 10.84.172.131 with SMTP id n3mr2180544plb.408.1505846899160; Tue, 19 Sep 2017 11:48:19 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1505846899; cv=none; d=google.com; s=arc-20160816; b=K2YoeLnGm5se0vbqYdd/+ACphlK/ivG8opdond3MeIYOvefATm9G62AZ3ul/wqaevO oFQxBg0JCSWAhpdS5IOA/UdTmfpYzLf9TLx8cRtgH+pJojlKbLlsifdHIiv5JpJceyiC qwT48lvl6odVnNpjMJeSByZBR3dQofcs24kom7XQ8Q28RhDIuSy4J5oywMg7GJKUKPwJ TIzFEbyuiMZSkm1iRmft6DeGtTl2hoipH+n6u8791SSszYHbvK7tZPZVU7dxXirAV2Ou oHPPGZI172OF7xRu/MtY2d8SN+L9xnfDOv8tpBKr3Ln9Lk9xl0TJvbH3Q/f7msGadnoi qbpA== 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=jyFBMl2cKfancZGPuIbT1TLbJRxt6lp0cppg8cEG/cY=; b=mWfL6ZMK1rhjQEy/zYONnxOtA8U5jbDtOrW+gyiCl2ETlLYGY3hDn8Oe06Ufnson0s /SjYgBgY8tqC0BoyXaD3WLr/LL8M5uxjVjHkbFSL5cqkowhz+Jq0rXKQ2uJW1+oKO92/ I3YvC/qyGJ/mTRNFyScHsWNDlEjcGHUK9nDM5y4j+XghVm4hRfxjNCs7sWzV+48Xczaj 2/L++annHXPrfgyUTMabqjagbr7tsDn0pOi2f7RAzvAFWyh5P5llL7BT4e/OEn6TXgyd nrHQPE/u4pS6E59NbUDHvJ/BdB/ssfCbr5cc5cURT1/cYdQNg8TTeyfh2CYHHzXYHL68 lzgw== 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 j8si1826809pgp.526.2017.09.19.11.48.18; Tue, 19 Sep 2017 11:48:19 -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 S1751722AbdISSsP (ORCPT + 26 others); Tue, 19 Sep 2017 14:48:15 -0400 Received: from foss.arm.com ([217.140.101.70]:54068 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751621AbdISSsM (ORCPT ); Tue, 19 Sep 2017 14:48:12 -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 69573165D; Tue, 19 Sep 2017 11:48:12 -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 2A6FA3F483; Tue, 19 Sep 2017 11:48:11 -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, mturquette@baylibre.com, sboyd@codeaurora.org, viresh.kumar@linaro.org, mark.rutland@arm.com, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, linux-pm@vger.kernel.org, jhugo@codeaurora.org, wangxiongfeng2@huawei.com, Jonathan.Zhang@cavium.com, ahs3@redhat.com, Jeremy Linton Subject: [PATCH v2 3/6] drivers: base: cacheinfo: arm64: Add support for ACPI based firmware tables Date: Tue, 19 Sep 2017 13:47:48 -0500 Message-Id: <20170919184751.25110-4-jeremy.linton@arm.com> X-Mailer: git-send-email 2.13.5 In-Reply-To: <20170919184751.25110-1-jeremy.linton@arm.com> References: <20170919184751.25110-1-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 | 10 ++++++++-- 4 files changed, 38 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 f7694fa1e0bd..0dd918c3782c 100644 --- a/drivers/acpi/pptt.c +++ b/drivers/acpi/pptt.c @@ -331,6 +331,7 @@ 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 = found_cache; 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..0114eb9ab67b 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 +103,7 @@ 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 acpi_find_last_cache_level(unsigned int cpu); const struct attribute_group *cache_get_priv_group(struct cacheinfo *this_leaf);