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 CB819C55174 for ; Fri, 31 Jul 2026 17:53:20 +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=HbwVJZZH8ZzrI+RF7qURJzltXs9Sil7+lRJAZNzSVCE=; b=xm793si70mkY8TvCvW/TwbSc7i jkTzulgp1I9XRMCLZq7EQVLHlDY+KwZAyI2yaQeTyHoEoE6lFkmcv+sXCWgYnFeeRFnp4VOEqfBUG cQ34bG5Cqw55lOKySUI3EU8AMVPsfRT8J7cg+xZRo5M7TNFHoBt6il8cmNYNkzqCeh59bgATiJldc erju9Gbw6I79IGi2vWmwUTyGWCgHFhFjxc2cvAWboG7k4Dnc481XH7nMqlTw5547SL+JRe0fm7PEj QqsVrSAoByIRHyF/owuaM3+ys0Wzg36GPMem38gX/Abq2UgM/3Q1CfSqOGHlXO40jPceDYAPbkbG8 gi3uVkcg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wprPx-0000000DIbc-2iWl; Fri, 31 Jul 2026 17:53:09 +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 1wprPs-0000000DIZC-2Nok for linux-arm-kernel@lists.infradead.org; Fri, 31 Jul 2026 17:53:05 +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 4F6EC22C7; Fri, 31 Jul 2026 10:52:59 -0700 (PDT) Received: from e134344.cambridge.arm.com (e134344.arm.com [10.2.212.8]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 7E1DA3F66F; Fri, 31 Jul 2026 10:53:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1785520383; bh=aaANCuK6JowsooolSKuvPbBp3qe85hIFwZCVvu0N4OE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hMZznL9/5+ZbCizTCWG6g+v56JwTH1TlbriX/6WfffCJLkKQnpHAkThYq6aGtAGKQ qmHsUFM2YrtxyYQl26uY/ULiC2Ikihj03XmdzefNAPYcp0nhh5uvxTxm3pz6TW8Azn D/7i5WHN6fNfk5IioMBuDyl1kh7tLGdGuCmuc+sc= From: Ben Horgan To: ben.horgan@arm.com, will@kernel.org Cc: james.morse@arm.com, fenghuay@nvidia.com, linux-arm-kernel@lists.infradead.org, andre.przywara@arm.com, gshan@redhat.com, tan.shaopeng@jp.fujitsu.com, sdonthineni@nvidia.com, jonathan.cameron@oss.qualcomm.com, Jonathan Cameron Subject: [PATCH 3/6] arm_mpam: resctrl: Add resctrl_arch_config_cntr() for ABMC use Date: Fri, 31 Jul 2026 18:52:40 +0100 Message-ID: <20260731175243.904730-4-ben.horgan@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260731175243.904730-1-ben.horgan@arm.com> References: <20260731175243.904730-1-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-20260731_105304_700862_0F772AE8 X-CRM114-Status: GOOD ( 12.89 ) 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. Signed-off-by: James Morse Signed-off-by: Ben Horgan Tested-by: Shaopeng Tan Tested-by: Fenghua Yu Tested-by: Gavin Shan Reviewed-by: Jonathan Cameron Reviewed-by: Shaopeng Tan Reviewed-by: Fenghua Yu Reviewed-by: Gavin Shan --- Changes since new rfc: Mention mbm_event mode in commit message Changes since v3: Warning bound (Sashiko) Changes since v4: resctrl_arch_reset_rmid() -> reset_arch_reset_cntr() Changes since v5: Add Gavin's R-b & T-b --- drivers/resctrl/mpam_resctrl.c | 48 +++++++++++++++++++++++++++++----- 1 file changed, 42 insertions(+), 6 deletions(-) diff --git a/drivers/resctrl/mpam_resctrl.c b/drivers/resctrl/mpam_resctrl.c index 0698a235d15c..ab322865c51b 100644 --- a/drivers/resctrl/mpam_resctrl.c +++ b/drivers/resctrl/mpam_resctrl.c @@ -125,12 +125,6 @@ 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) @@ -1082,6 +1076,48 @@ 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) +{ + /* Same CDP index remap as closid; maps cntr_id to assigned_counters[]. */ + u32 mbwu_idx, mon_idx = resctrl_get_config_index(cntr_id, cdp_type); + + 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 (evtid != QOS_L3_MBM_TOTAL_EVENT_ID) { + pr_debug("unexpected event id\n"); + return; + } + + 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_cntr(r, d, closid, rmid, cntr_id, QOS_L3_MBM_TOTAL_EVENT_ID); +} + static int mpam_resctrl_control_init(struct mpam_resctrl_res *res) { struct mpam_class *class = res->class; -- 2.43.0