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 A86D42E7648 for ; Fri, 13 Mar 2026 17:45:36 +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=1773423938; cv=none; b=uKIigPufIyvN9caM4DQzbxs2efbn0hQIwX4YKO4agmF9SrmMSBvpZ/0rG3i72YBUxvnpa4FSvQLqQsvQ9tjcVJGQfJndZppfl67CAyexK7PWGZVUemBlP8nhhG36yk4LJfOyj2MWehDV1xaUDiQraWjlBpKYZtbAsy0TfWrb6pw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773423938; c=relaxed/simple; bh=ovvd5Fmwe81CeRznwoRksyLsiMY5xCC5XXOo9NYaMt8=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=PJxKypODhILjSVnA/0qE4vnXQz1E7O2mejonWdTv2gY4vKXxzKBMaRccgCiaAKKoxcalLoXYjxntrfehwj8ImWZhCJrSK9txU4fcg8pKoE91RQA8HxK3xsSua0SZQNrhya7CojrF+GY7o49dzRUNJFqn6Q6tvNZ5corR2vkL9Zo= 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 D216B176A; Fri, 13 Mar 2026 10:45:29 -0700 (PDT) Received: from e134344.cambridge.arm.com (e134344.arm.com [10.1.196.46]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id DA4163F694; Fri, 13 Mar 2026 10:45:33 -0700 (PDT) From: Ben Horgan To: linux-kernel@vger.kernel.org Cc: tony.luck@intel.com, reinette.chatre@intel.com, Dave.Martin@arm.com, james.morse@arm.com, babu.moger@amd.com, tglx@kernel.org, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, ben.horgan@arm.com, fenghuay@nvidia.com, tan.shaopeng@fujitsu.com Subject: [PATCH v2 0/6] x86,fs/resctrl: Pave the way for MPAM counter assignment Date: Fri, 13 Mar 2026 17:45:18 +0000 Message-ID: <20260313174524.3482767-1-ben.horgan@arm.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit A little bit of preparatory work to get ready for MPAM counter assignment. Resctrl gained support last year for counter assignment for AMD machines supporting ABMC. Tighten a few things up, that weren't needed for AMD, so that the MPAM driver can emulate ABMC and hence support counter assignment. Based on v7.0-rc3. The last patch is only there to resolve the conflict in the case that the mpam resctrl glue series [1] is merged first. Changes since v1: https://lore.kernel.org/lkml/20260225201905.3568624-1-ben.horgan@arm.com/ Update the commit message for adding resctrl_arch_is_evt_configurable() and change the new argument name to per_cntr Make the event_filter file read only rather than hiding it Include resctrl arch hook for fixed counter assignment mode. This replaces: https://lore.kernel.org/lkml/20260204161952.685921-1-ben.horgan@arm.com/ Include both new helpers in the mpam build fix [1] https://lore.kernel.org/linux-arm-kernel/20260313144617.3420416-1-ben.horgan@arm.com/ Ben Horgan (6): x86,fs/resctrl: Make resctrl_arch_is_evt_configurable() aware of mbm_assign_mode fs/resctrl: Tidy up the error path in resctrl_mkdir_event_configs() fs/resctrl: Make 'event_filter' files read only if they're not configurable fs/resctrl: Disallow the software controller when mbm counters are assignable x86,fs/resctrl: Add resctrl_arch_mbm_cntr_assign_fixed() arm_mpam: resctrl: Adapt to new or changed resctrl arch functions arch/x86/kernel/cpu/resctrl/core.c | 12 +++++++++-- arch/x86/kernel/cpu/resctrl/monitor.c | 5 +++++ drivers/resctrl/mpam_resctrl.c | 7 ++++++- fs/resctrl/monitor.c | 18 +++++++++++++--- fs/resctrl/rdtgroup.c | 30 ++++++++++++++++++++------- include/linux/resctrl.h | 12 ++++++++++- 6 files changed, 70 insertions(+), 14 deletions(-) -- 2.43.0