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 DE3ADCD4F3D for ; Wed, 20 May 2026 21:25:52 +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=FaoEiV610Q7/DP9Gjx589oOp7CGUapy2XEvUbNuSk1A=; b=43/JjUyT8h0vctGWrlMyafHR+U Fxr8mvtchkZt7Ow4X7OxN3/P81q52kFI8S4OHOQe3huYWCnc/GrILh4vVgaD9gpsUzLTy6WLKBR5s 638oQad59r/tBa+P460u3USEdUykV9DKFQG6binpnVau0B0zJUUiCv1MmcE98dKhfGI9LZI137j7v z1438Mspj87GGA4sgg1CU+/8O2bhuk2NPrDkN/+QD4n2X1tvSPaolX1ThVDbv0bHGysxzNuO/VKYR Fdv89Uv74NGwDWPFzx71CjLp/8FKABnGqxcoPaSOZ75CWgbfkHNh6QBbOd91+cBE+af7H3qbxmyDa IQICjNmw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wPoQA-00000005psQ-2SON; Wed, 20 May 2026 21:25:42 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wPoQ2-00000005poE-1pwO for linux-arm-kernel@lists.infradead.org; Wed, 20 May 2026 21:25:37 +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 E5D224907; Wed, 20 May 2026 14:25:26 -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 E8D373F632; Wed, 20 May 2026 14:25:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1779312332; bh=t099DCjdTyw9FECNdkpLY/vq9tiS5T1x4O940Fbcm0Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TN+5lKU5zOpL4U+iiN3VxSiBGh2AnUW/bX0Rm+GqtBe5Os+X30j3T9XIIMk+5gwQ9 /Murn7K4sArSaBr9fn3U+yeFHlsNMEO3qGhMU22k8VoaKDKnvqiOhqdDtHaJQYaa87 oakBvmVMUXDsyL3mjVbEpuWFUnd801Zu1CiGs2/c= 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, jic23@kernel.org, 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, zengheng4@huawei.com, x86@kernel.org, Jonathan Cameron Subject: [PATCH v4 3/5] arm_mpam: resctrl: Add resctrl_arch_config_cntr() for ABMC use Date: Wed, 20 May 2026 22:24:56 +0100 Message-ID: <20260520212458.1797221-4-ben.horgan@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260520212458.1797221-1-ben.horgan@arm.com> References: <20260520212458.1797221-1-ben.horgan@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260520_142536_221945_236CDA3D X-CRM114-Status: GOOD ( 12.96 ) 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 ABMC, mbm_event mode, has a helper resctrl_arch_config_cntr() for changing the mapping between 'cntr_id' and a CLOSID/RMID pair. Add the helper. For MPAM this is done by updating the mon->mbwu_idx_to_mon[] array, and as usual CDP means it needs doing in three different ways. Reviewed-by: Jonathan Cameron Signed-off-by: James Morse Signed-off-by: Ben Horgan --- Changes since new rfc: Mention mbm_event mode in commit message Changes since v3: Warning bound (Sashiko) --- drivers/resctrl/mpam_resctrl.c | 44 +++++++++++++++++++++++++++++----- 1 file changed, 38 insertions(+), 6 deletions(-) diff --git a/drivers/resctrl/mpam_resctrl.c b/drivers/resctrl/mpam_resctrl.c index a13eb232a19d..1f9a8ae157ca 100644 --- a/drivers/resctrl/mpam_resctrl.c +++ b/drivers/resctrl/mpam_resctrl.c @@ -127,12 +127,6 @@ void resctrl_arch_reset_cntr(struct rdt_resource *r, struct rdt_l3_mon_domain *d { } -void resctrl_arch_config_cntr(struct rdt_resource *r, struct rdt_l3_mon_domain *d, - enum resctrl_event_id evtid, u32 rmid, u32 closid, - u32 cntr_id, bool assign) -{ -} - int resctrl_arch_cntr_read(struct rdt_resource *r, struct rdt_l3_mon_domain *d, u32 unused, u32 rmid, int cntr_id, enum resctrl_event_id eventid, u64 *val) @@ -1076,6 +1070,44 @@ static void mpam_resctrl_pick_counters(void) } } +static void __config_cntr(struct mpam_resctrl_mon *mon, u32 cntr_id, + enum resctrl_conf_type cdp_type, u32 closid, u32 rmid, + bool assign) +{ + u32 mbwu_idx, mon_idx = resctrl_get_config_index(cntr_id, cdp_type); + + WARN_ON_ONCE(mon_idx >= l3_num_allocated_mbwu); + + closid = resctrl_get_config_index(closid, cdp_type); + mbwu_idx = resctrl_arch_rmid_idx_encode(closid, rmid); + + if (assign) + mon->mbwu_idx_to_mon[mbwu_idx] = mon->assigned_counters[mon_idx]; + else + mon->mbwu_idx_to_mon[mbwu_idx] = -1; +} + +void resctrl_arch_config_cntr(struct rdt_resource *r, struct rdt_l3_mon_domain *d, + enum resctrl_event_id evtid, u32 rmid, u32 closid, + u32 cntr_id, bool assign) +{ + struct mpam_resctrl_mon *mon = &mpam_resctrl_counters[evtid]; + + if (!mon->mbwu_idx_to_mon || !mon->assigned_counters) { + pr_debug("monitor arrays not allocated\n"); + return; + } + + if (cdp_enabled) { + __config_cntr(mon, cntr_id, CDP_CODE, closid, rmid, assign); + __config_cntr(mon, cntr_id, CDP_DATA, closid, rmid, assign); + } else { + __config_cntr(mon, cntr_id, CDP_NONE, closid, rmid, assign); + } + + resctrl_arch_reset_rmid(r, d, closid, rmid, evtid); +} + static int mpam_resctrl_control_init(struct mpam_resctrl_res *res) { struct mpam_class *class = res->class; -- 2.43.0