From patchwork Fri Jan 20 12:18:56 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sudeep Holla X-Patchwork-Id: 13109692 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E1BECC05027 for ; Fri, 20 Jan 2023 12:20:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=DG+VUKZ3dGgmPp1VyoD9jMMO+R/wLQ0fAbaYPMxT3gI=; b=XclLT8ieTyNIa+ wnm9w3HKYuWJuezU/fV0oV0C6ce8iRBX+xD2jHR9YG2Nnvqq6ONJySGuE8fp7oNZeM168FJy7xMse kl1OsBffH/qzHS3InVjITZARepfbrjpilELQAwWSmkIlKSPMWxffFbgXdmSiyHc1XH/u4OzrBqhOu Gjd9U3ysJLXYQ/eu/qTs39FnEgYPzboNPv0zFIM9fJNpl198PZiHsRARcaUvi3rm4soWTCNELeV2S a5c/tj+EglxYE1Q4vYmZ/0w8uKafCFYtLfQi/B1q2sZ1d9Gm/LmiR6NzxbtPunJ9rXmDhNCFgC6jI IQKkqW4CPy+34qLZiwZA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pIqMw-00ADjc-II; Fri, 20 Jan 2023 12:19:42 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pIqMs-00ADiW-PW; Fri, 20 Jan 2023 12:19:40 +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 8363C14BF; Fri, 20 Jan 2023 04:20:16 -0800 (PST) Received: from usa.arm.com (e103737-lin.cambridge.arm.com [10.1.197.49]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id D379E3F71A; Fri, 20 Jan 2023 04:19:33 -0800 (PST) From: Sudeep Holla To: Greg Kroah-Hartman , linux-kernel@vger.kernel.org Cc: Sudeep Holla , "Rafael J. Wysocki" , Yong-Xuan Wang , ALKML , linux-riscv@lists.infradead.org, Pierre Gondois Subject: [GIT PULL] cacheinfo/arch_topology: Updates for v6.3 Date: Fri, 20 Jan 2023 12:18:56 +0000 Message-Id: <20230120121856.1407369-1-sudeep.holla@arm.com> X-Mailer: git-send-email 2.39.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230120_041938_921409_4BDE8EF2 X-CRM114-Status: GOOD ( 11.21 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Greg, Please pull ! It has been tested on RISC-V which is the main users outside of arm64. The ACPI the RISC-V parts are acked-by the respective maintainers. All the changes are in the -next for sometime and no issues reported at this time. Regards, Sudeep -->8 The following changes since commit 1b929c02afd37871d5afb9d498426f83432e71c2: Linux 6.2-rc1 (2022-12-25 13:41:39 -0800) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux.git tags/archtopo-cacheinfo-updates-6.3 for you to fetch changes up to 198102c9103fc78d8478495971947af77edb05c1: cacheinfo: Fix shared_cpu_map to handle shared caches at different levels (2023-01-18 09:58:40 +0000) ---------------------------------------------------------------- cacheinfo and arch_topology updates for v6.3 The main change is to build the cache topology information for all the CPUs from the primary CPU. Currently the cacheinfo for secondary CPUs is created during the early boot on the respective CPU itself. Preemption and interrupts are disabled at this stage. On PREEMPT_RT kernels, allocating memory and even parsing the PPTT table for ACPI based systems triggers a: 'BUG: sleeping function called from invalid context' To prevent this bug, the cacheinfo is now allocated from the primary CPU when preemption and interrupts are enabled and before booting secondary CPUs. The cache levels/leaves are computed from DT/ACPI PPTT information only, without relying on any architecture specific mechanism if done so early. The other minor change included here is to handle shared caches at different levels when not all the CPUs on the system have the same cache hierarchy. ---------------------------------------------------------------- Pierre Gondois (6): cacheinfo: Use RISC-V's init_cache_level() as generic OF implementation cacheinfo: Return error code in init_of_cache_level() cacheinfo: Check 'cache-unified' property to count cache leaves ACPI: PPTT: Remove acpi_find_cache_levels() ACPI: PPTT: Update acpi_find_last_cache_level() to acpi_get_cache_info() arch_topology: Build cacheinfo from primary CPU Yong-Xuan Wang (1): cacheinfo: Fix shared_cpu_map to handle shared caches at different levels arch/arm64/kernel/cacheinfo.c | 11 +-- arch/riscv/kernel/cacheinfo.c | 42 ----------- drivers/acpi/pptt.c | 93 ++++++++++++++---------- drivers/base/arch_topology.c | 12 +++- drivers/base/cacheinfo.c | 161 +++++++++++++++++++++++++++++++++++------- include/linux/cacheinfo.h | 11 ++- 6 files changed, 213 insertions(+), 117 deletions(-)