From mboxrd@z Thu Jan 1 00:00:00 1970 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 B20C1F4BB6C for ; Tue, 24 Feb 2026 17:59:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=SRvhDUKg2vW7IHwXLzAT/t0LC070u0QMVaUxleTcqpM=; b=nuyRzfek3mBHTckr3Um4ZF0rMg BJn9nTyqbnqheoof5fZbSmqhF/ZSpF1mTZnEKnBTlyo8OUCwG5h/epuDBMmmurwCVAMUwkj3627Hq +CG3m8/KGRscHXXtyWUkYC6c2AnZKN+gbb8wKVBayljtRv/NzvcNtoZnkvoc/nxfS4NJCq+mfLF81 4bH92ggfiwWKonkXsyISLMI7nvVYRq2ZjyPPzCBlS4Yk755w3REPwWDuJvpewgzfqCQLAQ2iJyUg1 fav8bTUBVK2e9VHlhxnmhN8nTQfhxlSS4xIbPhLMZGk3l/PJO/AhBL0vWGulBD27Pa1eynEch+lfB bT/Szxng==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vuwgf-00000002XyH-2CIi; Tue, 24 Feb 2026 17:59:09 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vuwgU-00000002Xir-1N9e for linux-arm-kernel@bombadil.infradead.org; Tue, 24 Feb 2026 17:58:58 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Transfer-Encoding:MIME-Version :References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=SRvhDUKg2vW7IHwXLzAT/t0LC070u0QMVaUxleTcqpM=; b=edChZ1Fr9BxdFukHUS2ZZVASaf R1g5snHJ3LStKK4GAFFk9pvdiFYDcOL11gPthLJfxZu8SMAlSSvOEVX/M4CJnvDIS3uy8qJsESoeZ 3ED61fXPVlweGQ+dXJM1tQm81VWV0ukpACt266hcdZ4KVPDWvT5Q039Rq0dx96+NY2UrHBVAVhWU0 qm2ofjEgbXyE4Ss59BlGvJIUKoN31xnF53UyKXDzJ3Jz5LArTBDMDsBfEdUVmRvoIxGQjDjnZdCxE T8EUqI//WkotBnTz1mBBhXGPTMe/gqSn+08fnhz04smHS7xu/48lCl3XkGblghmIGGRrMpQ3dHP+S YeWrxTBw==; Received: from foss.arm.com ([217.140.110.172]) by desiato.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vuwgN-00000007djC-38ux for linux-arm-kernel@lists.infradead.org; Tue, 24 Feb 2026 17:58:55 +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 415D0165C; Tue, 24 Feb 2026 09:58:44 -0800 (PST) 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 A26D53F59E; Tue, 24 Feb 2026 09:58:45 -0800 (PST) From: Ben Horgan To: ben.horgan@arm.com Cc: amitsinght@marvell.com, baisheng.gao@unisoc.com, baolin.wang@linux.alibaba.com, carl@os.amperecomputing.com, dave.martin@arm.com, david@kernel.org, dfustini@baylibre.com, fenghuay@nvidia.com, gshan@redhat.com, james.morse@arm.com, jonathan.cameron@huawei.com, kobak@nvidia.com, lcherian@marvell.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, peternewman@google.com, punit.agrawal@oss.qualcomm.com, quic_jiles@quicinc.com, reinette.chatre@intel.com, rohit.mathew@arm.com, scott@os.amperecomputing.com, sdonthineni@nvidia.com, tan.shaopeng@fujitsu.com, xhao@linux.alibaba.com, catalin.marinas@arm.com, will@kernel.org, corbet@lwn.net, maz@kernel.org, oupton@kernel.org, joey.gouly@arm.com, suzuki.poulose@arm.com, kvmarm@lists.linux.dev, zengheng4@huawei.com, linux-doc@vger.kernel.org, Shaopeng Tan Subject: [PATCH v5 15/41] arm_mpam: resctrl: Implement resctrl_arch_reset_all_ctrls() Date: Tue, 24 Feb 2026 17:56:54 +0000 Message-ID: <20260224175720.2663924-16-ben.horgan@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260224175720.2663924-1-ben.horgan@arm.com> References: <20260224175720.2663924-1-ben.horgan@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260224_175852_142165_CF7BB009 X-CRM114-Status: GOOD ( 11.65 ) 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 From: James Morse We already have a helper for resetting an mpam class and component. Hook it up to resctrl_arch_reset_all_ctrls() and the domain offline path. Tested-by: Gavin Shan Tested-by: Shaopeng Tan Tested-by: Peter Newman Tested-by: Zeng Heng Reviewed-by: Shaopeng Tan Reviewed-by: Zeng Heng Signed-off-by: James Morse Signed-off-by: Ben Horgan --- Changes since v2: Don't expose unlocked reset Changes since v3: Don't use or expose mpam_reset_component_locked() --- drivers/resctrl/mpam_devices.c | 2 +- drivers/resctrl/mpam_internal.h | 3 +++ drivers/resctrl/mpam_resctrl.c | 13 +++++++++++++ 3 files changed, 17 insertions(+), 1 deletion(-) diff --git a/drivers/resctrl/mpam_devices.c b/drivers/resctrl/mpam_devices.c index b45743c5fb46..e4a302a53991 100644 --- a/drivers/resctrl/mpam_devices.c +++ b/drivers/resctrl/mpam_devices.c @@ -2567,7 +2567,7 @@ static void mpam_reset_component_locked(struct mpam_component *comp) } } -static void mpam_reset_class_locked(struct mpam_class *class) +void mpam_reset_class_locked(struct mpam_class *class) { struct mpam_component *comp; diff --git a/drivers/resctrl/mpam_internal.h b/drivers/resctrl/mpam_internal.h index 28ac501e1ac3..e2704f678af5 100644 --- a/drivers/resctrl/mpam_internal.h +++ b/drivers/resctrl/mpam_internal.h @@ -392,6 +392,9 @@ extern u8 mpam_pmg_max; void mpam_enable(struct work_struct *work); void mpam_disable(struct work_struct *work); +/* Reset all the RIS in a class under cpus_read_lock() */ +void mpam_reset_class_locked(struct mpam_class *class); + int mpam_apply_config(struct mpam_component *comp, u16 partid, struct mpam_config *cfg); diff --git a/drivers/resctrl/mpam_resctrl.c b/drivers/resctrl/mpam_resctrl.c index fe566e39aa4d..5f482c6293e7 100644 --- a/drivers/resctrl/mpam_resctrl.c +++ b/drivers/resctrl/mpam_resctrl.c @@ -168,6 +168,19 @@ static int mpam_resctrl_pick_domain_id(int cpu, struct mpam_component *comp) return comp->comp_id; } +void resctrl_arch_reset_all_ctrls(struct rdt_resource *r) +{ + struct mpam_resctrl_res *res; + + lockdep_assert_cpus_held(); + + if (!mpam_is_enabled()) + return; + + res = container_of(r, struct mpam_resctrl_res, resctrl_res); + mpam_reset_class_locked(res->class); +} + static void mpam_resctrl_domain_hdr_init(int cpu, struct mpam_component *comp, enum resctrl_res_level rid, struct rdt_domain_hdr *hdr) -- 2.43.0