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 03511CA9EAF for ; Sun, 27 Oct 2019 14:45:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CA55421E6F for ; Sun, 27 Oct 2019 14:45:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1572187517; bh=7WADeKBaB4arR8SftPdnUH6Zgraeo0sOTstc86e4hTw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=QzLIKkecEMzCuS6eYlMqbQftpcra1KaO9ssYKNieScy9UUUPRr70RakUXVVlFUpt7 N1fN5o7JLzuySMODoFa4J5HwsS4ey+hZRPGSN24FPN4zc2ZGKes1lrURce9NE1tx3h SPEJbcNZS8vfYTfcH48BOA4wGjT6uHZ6Btby/hOg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727394AbfJ0OpQ (ORCPT ); Sun, 27 Oct 2019 10:45:16 -0400 Received: from mail.kernel.org ([198.145.29.99]:38170 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726884AbfJ0OpQ (ORCPT ); Sun, 27 Oct 2019 10:45:16 -0400 Received: from localhost.localdomain (82-132-239-15.dab.02.net [82.132.239.15]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 267A5214AF; Sun, 27 Oct 2019 14:45:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1572187515; bh=7WADeKBaB4arR8SftPdnUH6Zgraeo0sOTstc86e4hTw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=V1v8UzLCqO0MdDSA4+Q2KaRcrzQnVzPnV316gLeJzeXQAU4GGsryQOWzB+Rm6YQhN mSZsiHY1cbtErphVcLFlu/AUFtUHNkWzSiaOztcyHnuuqmrTnhlUo0BQug28vWRhXr frtWk0osTXX3Jf2EXD1jyMsN7PEZrJDjrn9j0Uis= 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 , Zenghui Yu , Jayachandran C , Robert Richter Subject: [PATCH v2 20/36] irqchip/gic-v4.1: Suppress per-VLPI doorbell Date: Sun, 27 Oct 2019 14:42:18 +0000 Message-Id: <20191027144234.8395-21-maz@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191027144234.8395-1-maz@kernel.org> References: <20191027144234.8395-1-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 10bd156aa042..75c4d1a6f20d 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