From nobody Tue Dec 16 15:08:43 2025 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id DEA342FE585 for ; Fri, 5 Dec 2025 22:01:14 +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=1764972076; cv=none; b=Y2WnzWb01/PXLiFo811XGq+ykT0QeQmppja5TT9R2gcMw8UPDsgINhMiwloJY13SNTw1eF3e9HA8RHth2/6V/dpGdTfCsIdUJXq5mIapdHsIvZ3EuyMqFpAdc+i8URZlkBshkh5a97qoX4Z6BGiv3bgM9ngZ+5rkrfH/27ic8Uo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764972076; c=relaxed/simple; bh=5Ymt2AMKHk4CKCow414PzZ8bYi7EcNfN3ULWEK5rG3g=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=rFY14tGCqbMUx6xYLYqPbzQ+OSww7Wti/uw2ZWajQFOevd0fFLRAT/jB08WBlhO7tptwgXDCnBklZs4cs2mMtqa5mMjs5Cf8mPAWhIwcapZjCwGV8TOuw2p7/RHhCJJA2Fino69gR8DE21KztNWA7MtkbeTIFm6o2J6U/vBJh9Q= 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 CD1541BC0; Fri, 5 Dec 2025 14:01:06 -0800 (PST) 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 6E1E53F740; Fri, 5 Dec 2025 14:01:10 -0800 (PST) From: James Morse To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: James Morse , 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 , Dave Martin , Koba Ko , Shanker Donthineni , fenghuay@nvidia.com, baisheng.gao@unisoc.com, Jonathan Cameron , Gavin Shan , Ben Horgan , rohit.mathew@arm.com, reinette.chatre@intel.com, Punit Agrawal Subject: [RFC PATCH 26/38] arm_mpam: resctrl: Add resctrl_arch_cntr_read() & resctrl_arch_reset_cntr() Date: Fri, 5 Dec 2025 21:58:49 +0000 Message-Id: <20251205215901.17772-27-james.morse@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20251205215901.17772-1-james.morse@arm.com> References: <20251205215901.17772-1-james.morse@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" When used in ABMC mode, resctrl uses a different set of helpers to read and reset the counters. Add these. Signed-off-by: James Morse --- drivers/resctrl/mpam_resctrl.c | 43 ++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/drivers/resctrl/mpam_resctrl.c b/drivers/resctrl/mpam_resctrl.c index dc8a819d0976..1333dc40714a 100644 --- a/drivers/resctrl/mpam_resctrl.c +++ b/drivers/resctrl/mpam_resctrl.c @@ -454,6 +454,28 @@ int resctrl_arch_rmid_read(struct rdt_resource *r, str= uct rdt_mon_domain *d, closid, rmid, val); } =20 +/* MBWU counters when in ABMC mode */ +int resctrl_arch_cntr_read(struct rdt_resource *r, struct rdt_mon_domain *= d, + u32 closid, u32 rmid, int mon_idx, + enum resctrl_event_id eventid, u64 *val) +{ + struct mpam_resctrl_mon *mon =3D &mpam_resctrl_counters[eventid]; + struct mpam_resctrl_dom *l3_dom; + struct mpam_component *mon_comp; + + if (!mpam_is_enabled()) + return -EINVAL; + + if (eventid =3D=3D QOS_L3_OCCUP_EVENT_ID || !mon->class) + return -EINVAL; + + l3_dom =3D container_of(d, struct mpam_resctrl_dom, resctrl_mon_dom); + mon_comp =3D l3_dom->mon_comp[eventid]; + + return read_mon_cdp_safe(mon, mon_comp, mpam_feat_msmon_mbwu, mon_idx, + closid, rmid, val); +} + static void __reset_mon(struct mpam_resctrl_mon *mon, struct mpam_componen= t *mon_comp, int mon_idx, enum resctrl_conf_type cdp_type, u32 closid, u32 rmid) @@ -509,6 +531,27 @@ void resctrl_arch_reset_rmid(struct rdt_resource *r, s= truct rdt_mon_domain *d, reset_mon_cdp_safe(mon, mon_comp, USE_PRE_ALLOCATED, closid, rmid); } =20 +/* Reset an assigned counter */ +void resctrl_arch_reset_cntr(struct rdt_resource *r, struct rdt_mon_domain= *d, + u32 closid, u32 rmid, int cntr_id, + enum resctrl_event_id eventid) +{ + struct mpam_resctrl_mon *mon =3D &mpam_resctrl_counters[eventid]; + struct mpam_resctrl_dom *l3_dom; + struct mpam_component *mon_comp; + + if (!mpam_is_enabled()) + return; + + if (eventid =3D=3D QOS_L3_OCCUP_EVENT_ID || !mon->class) + return; + + l3_dom =3D container_of(d, struct mpam_resctrl_dom, resctrl_mon_dom); + mon_comp =3D l3_dom->mon_comp[eventid]; + + reset_mon_cdp_safe(mon, mon_comp, USE_PRE_ALLOCATED, closid, rmid); +} + static bool cache_has_usable_cpor(struct mpam_class *class) { struct mpam_props *cprops =3D &class->props; --=20 2.39.5