From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 04ED620E700 for ; Thu, 8 May 2025 17:19:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746724759; cv=none; b=dwxz9mZOxP0yr42dvxx0FZaAxqPNde1GSZId9mT5xZoG/+X3bJiSc2Szw5lwT3Og9ikLddsLrzlCfT6+/w3HPkrtf1EKZ9+12eHDuivsVJbqgqefEmb0iexUfQELF/IrgJpa5jBdggMsJrSQ10xAHt7bgMxDdzpBrQX7hWikUuQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746724759; c=relaxed/simple; bh=gz8Zmm0qKpeNP6Sr6sNKfMZ3SW3zM2PCkG/ptYGnJzE=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=ZsjysG7C4Lo970NF0rBjhb6ji4GWd1sq23Q+ur/b5vyM6huh+t53LPwhI0R6H1Axrf3V1AORv53PvfRcEFaX+W/k+bPoge/GL0yj2sfN+vac85hlJ61NHEgm7ZFdR70Kjb323Oit1XDWYkXLFdJ1by/VcQo5Qj44C6GEm+uZBQ8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com 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 795CB1E2F; Thu, 8 May 2025 10:19:04 -0700 (PDT) Received: from merodach.members.linode.com (usa-sjc-mx-foss1.foss.arm.com [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id C73043F58B; Thu, 8 May 2025 10:19:11 -0700 (PDT) From: James Morse To: x86@kernel.org, linux-kernel@vger.kernel.org Cc: Reinette Chatre , Thomas Gleixner , Ingo Molnar , Borislav Petkov , H Peter Anvin , Babu Moger , James Morse , shameerali.kolothum.thodi@huawei.com, D Scott Phillips OS , carl@os.amperecomputing.com, lcherian@marvell.com, bobo.shaobowang@huawei.com, tan.shaopeng@fujitsu.com, baolin.wang@linux.alibaba.com, Jamie Iles , Xin Hao , peternewman@google.com, dfustini@baylibre.com, amitsinght@marvell.com, David Hildenbrand , Rex Nie , Dave Martin , Koba Ko , Shanker Donthineni , fenghuay@nvidia.com Subject: [PATCH v10 00/30] x86/resctrl: Move the resctrl filesystem code to /fs/resctrl Date: Thu, 8 May 2025 17:18:28 +0000 Message-Id: <20250508171858.9197-1-james.morse@arm.com> X-Mailer: git-send-email 2.20.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Changes since v8: * Rebased onto the cpumask optimisations. * Assorted commit message and comment clarifications. Changes otherwise noted on each patch. --- Patches 24-29 should be squashed together when merged, taking the commit message of patch 25. It probably makes sense to drop the tags at that point as patch 25 is generated by a script, and impossible to review. They are posted like this to allow folk to re-generate patch 25, then review the differences on top. Not squashing them together would expose a ftrace build warning during bisect. (but who does that!) The result should look like this: git://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git mpam/move_to_fs/v10_final I can also post the 'final' version to be picked up if that is less work. This series is based on rc5, and can be retrieved from: git://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git mpam/move_to_fs/v10 With the exception of invalid configurations for the configurable-events, there should be no changes in behaviour caused by this series. It is now possible for throttle_mode to report 'undefined', but no known platform will do this. resctrl_exit() is now something that can be called, but x86 doesn't do this. The driving pattern is to make things like struct rdtgroup private to resctrl. Features like pseudo-lock aren't going to work on arm64, the ability to disable it at compile time is added. After this, I can start posting the MPAM driver to make use of resctrl on arm64. (What's MPAM? See the cover letter of the first series. [1]) As ever - bugs welcome, Thanks, James [v9] https://lore.kernel.org/all/20250425173809.5529-1-james.morse@arm.com [v8] https://lore.kernel.org/all/20250411164229.23413-1-james.morse@arm.com [v7] https://lore.kernel.org/all/20250228195913.24895-1-james.morse@arm.com/ [v6] https://lore.kernel.org/lkml/20250207181823.6378-1-james.morse@arm.com/ [v5] https://lore.kernel.org/r/20241004180347.19985-1-james.morse@arm.com [v4] https://lore.kernel.org/all/20240802172853.22529-1-james.morse@arm.com/ [v3] https://lore.kernel.org/r/20240614150033.10454-1-james.morse@arm.com [v2] https://lore.kernel.org/r/20240426150537.8094-1-Dave.Martin@arm.com [v1] https://lore.kernel.org/r/20240321165106.31602-1-james.morse@arm.com [1] https://lore.kernel.org/lkml/20201030161120.227225-1-james.morse@arm.com/ Amit Singh Tomar (1): x86/resctrl: Remove the limit on the number of CLOSID Dave Martin (3): x86/resctrl: Squelch whitespace anomalies in resctrl core code x86/resctrl: Prefer alloc(sizeof(*foo)) idiom in rdt_init_fs_context() x86/resctrl: Relax some asm #includes James Morse (22): x86/resctrl: Rename resctrl_sched_in() to begin with "resctrl_arch_" x86/resctrl: Check all domains are offline in resctrl_exit() x86/resctrl: resctrl_exit() teardown resctrl but leave the mount point x86/resctrl: Drop __init/__exit on assorted symbols x86/resctrl: Move is_mba_sc() out of core.c x86/resctrl: Add end-marker to the resctrl_event_id enum x86/resctrl: Expand the width of domid by replacing mon_data_bits x86/resctrl: Split trace.h x86/resctrl: Add 'resctrl' to the title of the resctrl documentation fs/resctrl: Add boiler plate for external resctrl code x86/resctrl: Move the filesystem bits to headers visible to fs/resctrl x86/resctrl: Move enum resctrl_event_id to resctrl.h x86/resctrl: Fix types in resctrl_arch_mon_ctx_{alloc,free}() stubs x86/resctrl: Move pseudo lock prototypes to include/linux/resctrl.h x86/resctrl: Always initialise rid field in rdt_resources_all[] x86/resctrl: Remove a newline to avoid confusing the code move script x86,fs/resctrl: Move the resctrl filesystem code to live in /fs/resctrl x86,fs/resctrl: Remove duplicated trace header files fs/resctrl: Remove unnecessary includes fs/resctrl: Change internal.h's header guard macros x86,fs/resctrl: Move resctrl.rst to live under Documentation/filesystems MAINTAINERS: Add reviewers for fs/resctrl Yury Norov [NVIDIA] (4): cpumask: relax cpumask_any_but() find: add find_first_andnot_bit() cpumask: add cpumask_{first,next}_andnot() API x86/resctrl: Optimize cpumask_any_housekeeping() Documentation/arch/x86/index.rst | 1 - Documentation/filesystems/index.rst | 1 + .../{arch/x86 => filesystems}/resctrl.rst | 6 +- MAINTAINERS | 5 +- arch/Kconfig | 8 + arch/x86/Kconfig | 11 +- arch/x86/include/asm/resctrl.h | 19 +- arch/x86/kernel/cpu/resctrl/Makefile | 2 + arch/x86/kernel/cpu/resctrl/core.c | 31 +- arch/x86/kernel/cpu/resctrl/ctrlmondata.c | 635 --- arch/x86/kernel/cpu/resctrl/internal.h | 399 +- arch/x86/kernel/cpu/resctrl/monitor.c | 918 +--- arch/x86/kernel/cpu/resctrl/pseudo_lock.c | 1092 +---- .../resctrl/{trace.h => pseudo_lock_trace.h} | 26 +- arch/x86/kernel/cpu/resctrl/rdtgroup.c | 4164 +--------------- arch/x86/kernel/process_32.c | 2 +- arch/x86/kernel/process_64.c | 2 +- fs/Kconfig | 1 + fs/Makefile | 1 + fs/resctrl/Kconfig | 39 + fs/resctrl/Makefile | 6 + fs/resctrl/ctrlmondata.c | 661 +++ fs/resctrl/internal.h | 426 ++ fs/resctrl/monitor.c | 929 ++++ fs/resctrl/monitor_trace.h | 33 + fs/resctrl/pseudo_lock.c | 1105 +++++ fs/resctrl/rdtgroup.c | 4344 +++++++++++++++++ include/linux/cpumask.h | 75 +- include/linux/find.h | 25 + include/linux/resctrl.h | 36 +- include/linux/resctrl_types.h | 16 +- lib/find_bit.c | 11 + 32 files changed, 7763 insertions(+), 7267 deletions(-) rename Documentation/{arch/x86 => filesystems}/resctrl.rst (99%) rename arch/x86/kernel/cpu/resctrl/{trace.h => pseudo_lock_trace.h} (56%) create mode 100644 fs/resctrl/Kconfig create mode 100644 fs/resctrl/Makefile create mode 100644 fs/resctrl/ctrlmondata.c create mode 100644 fs/resctrl/internal.h create mode 100644 fs/resctrl/monitor.c create mode 100644 fs/resctrl/monitor_trace.h create mode 100644 fs/resctrl/pseudo_lock.c create mode 100644 fs/resctrl/rdtgroup.c -- 2.39.5