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 X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8CF35C4CECF for ; Mon, 23 Sep 2019 18:27:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 58D1A20665 for ; Mon, 23 Sep 2019 18:27:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569263264; bh=cwQDyKb3VMvbDLWN7gApPn+tm++UAFlIEiifDux42J0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ePQTmvSBFMzxohwH2PQICmyGFJN4YaUYeOeXJXSJD0oxve7cCHnZK4f8qAy+/2DiO QZk8LoUPMrEyWj/1FaQUdELvAldEEQRAzuKXD85tIPp0Pc1g0DYnvLm5/7llWu/OuG s1e+ue5YQrol4sAvreiLcgVEyCgPU/wa6jQOyjm0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733014AbfIWS1n (ORCPT ); Mon, 23 Sep 2019 14:27:43 -0400 Received: from foss.arm.com ([217.140.110.172]:46988 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727368AbfIWS1l (ORCPT ); Mon, 23 Sep 2019 14:27:41 -0400 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 71A331BB2; Mon, 23 Sep 2019 11:27:40 -0700 (PDT) Received: from big-swifty.lan (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 518013F694; Mon, 23 Sep 2019 11:27:34 -0700 (PDT) From: Marc Zyngier To: kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org Cc: Eric Auger , James Morse , Julien Thierry , Suzuki K Poulose , Thomas Gleixner , Jason Cooper , Lorenzo Pieralisi , Andrew Murray Subject: [PATCH 19/35] irqchip/gic-v4.1: Suppress per-VLPI doorbell Date: Mon, 23 Sep 2019 19:25:50 +0100 Message-Id: <20190923182606.32100-20-maz@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190923182606.32100-1-maz@kernel.org> References: <20190923182606.32100-1-maz@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Since GICv4.1 gives us a per-VPE doorbell, avoid programming anything else on VMOVI/VMAPI/VMAPTI and on any other action that would have otherwise resulted in a per-VLPI doorbell to be programmed. Signed-off-by: Marc Zyngier --- drivers/irqchip/irq-gic-v3-its.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index eda35e66237f..b791c9beddf2 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -691,7 +691,7 @@ static struct its_vpe *its_build_vmapti_cmd(struct its_node *its, { u32 db; - if (desc->its_vmapti_cmd.db_enabled) + if (!is_v4_1(its) && desc->its_vmapti_cmd.db_enabled) db = desc->its_vmapti_cmd.vpe->vpe_db_lpi; else db = 1023; @@ -714,7 +714,7 @@ static struct its_vpe *its_build_vmovi_cmd(struct its_node *its, { u32 db; - if (desc->its_vmovi_cmd.db_enabled) + if (!is_v4_1(its) && desc->its_vmovi_cmd.db_enabled) db = desc->its_vmovi_cmd.vpe->vpe_db_lpi; else db = 1023; @@ -1227,6 +1227,13 @@ static void its_vlpi_set_doorbell(struct irq_data *d, bool enable) struct its_device *its_dev = irq_data_get_irq_chip_data(d); u32 event = its_get_event_id(d); + /* + * GICv4.1 does away with the per-LPI nonsense, nothing to do + * here. + */ + if (is_v4_1(its_dev->its)) + return; + if (its_dev->event_map.vlpi_maps[event].db_enabled == enable) return; -- 2.20.1