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 B7CF9C2D0CF for ; Tue, 24 Dec 2019 11:11:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8D29B20706 for ; Tue, 24 Dec 2019 11:11:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1577185885; bh=wB2q8V6IWHe43lIsYJ1AEimImJriYZRMoU1uE02yDas=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=bUl2a2AzF0q/SmRLG8KLEkYbAfYP4FnF1+FhrvfKdEp0dPbuNJpp1mFF99dwEMH30 XueIlWu0Cu4Dn+B1EjUjcGsjMZDNkWJfcfukP5nZTrLjyjtvnJqpub+ZXrOE3IioUO cL36jYG5JizD1webN6KhVKHAtC0Twn/+rj9CRm5c= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727030AbfLXLLY (ORCPT ); Tue, 24 Dec 2019 06:11:24 -0500 Received: from inca-roads.misterjones.org ([213.251.177.50]:37476 "EHLO inca-roads.misterjones.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726298AbfLXLLS (ORCPT ); Tue, 24 Dec 2019 06:11:18 -0500 Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=why.lan) by cheepnis.misterjones.org with esmtpsa (TLSv1.2:DHE-RSA-AES128-GCM-SHA256:128) (Exim 4.80) (envelope-from ) id 1iji5s-000169-GZ; Tue, 24 Dec 2019 12:11:16 +0100 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 , Robert Richter Subject: [PATCH v3 08/32] irqchip/gic-v4.1: Implement the v4.1 flavour of VMOVP Date: Tue, 24 Dec 2019 11:10:31 +0000 Message-Id: <20191224111055.11836-9-maz@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191224111055.11836-1-maz@kernel.org> References: <20191224111055.11836-1-maz@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org, eric.auger@redhat.com, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com, tglx@linutronix.de, jason@lakedaemon.net, lorenzo.pieralisi@arm.com, Andrew.Murray@arm.com, yuzenghui@huawei.com, rrichter@marvell.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on cheepnis.misterjones.org); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org With GICv4.1, VMOVP is extended to allow a default doorbell to be specified, as well as a validity bit for this doorbell. As an added bonus, VMOVP isn't required anymore of moving a VPE between redistributors that share the same affinity. Let's add this support to the VMOVP builder, and make sure we don't issue the command if we don't really need to. Reviewed-by: Zenghui Yu Signed-off-by: Marc Zyngier --- drivers/irqchip/irq-gic-v3-its.c | 40 ++++++++++++++++++++++++++------ 1 file changed, 33 insertions(+), 7 deletions(-) diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 86c69b5cc156..fd9d3b6bb465 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -471,6 +471,17 @@ static void its_encode_vmapp_default_db(struct its_cmd_block *cmd, its_mask_encode(&cmd->raw_cmd[1], vpe_db_lpi, 31, 0); } +static void its_encode_vmovp_default_db(struct its_cmd_block *cmd, + u32 vpe_db_lpi) +{ + its_mask_encode(&cmd->raw_cmd[3], vpe_db_lpi, 31, 0); +} + +static void its_encode_db(struct its_cmd_block *cmd, bool db) +{ + its_mask_encode(&cmd->raw_cmd[2], db, 63, 63); +} + static inline void its_fixup_cmd(struct its_cmd_block *cmd) { /* Let's fixup BE commands */ @@ -757,6 +768,11 @@ static struct its_vpe *its_build_vmovp_cmd(struct its_node *its, its_encode_vpeid(cmd, desc->its_vmovp_cmd.vpe->vpe_id); its_encode_target(cmd, target); + if (is_v4_1(its)) { + its_encode_db(cmd, true); + its_encode_vmovp_default_db(cmd, desc->its_vmovp_cmd.vpe->vpe_db_lpi); + } + its_fixup_cmd(cmd); return valid_vpe(its, desc->its_vmovp_cmd.vpe); @@ -3328,7 +3344,7 @@ static int its_vpe_set_affinity(struct irq_data *d, bool force) { struct its_vpe *vpe = irq_data_get_irq_chip_data(d); - int cpu = cpumask_first(mask_val); + int from, cpu = cpumask_first(mask_val); /* * Changing affinity is mega expensive, so let's be as lazy as @@ -3336,14 +3352,24 @@ static int its_vpe_set_affinity(struct irq_data *d, * into the proxy device, we need to move the doorbell * interrupt to its new location. */ - if (vpe->col_idx != cpu) { - int from = vpe->col_idx; + if (vpe->col_idx == cpu) + goto out; - vpe->col_idx = cpu; - its_send_vmovp(vpe); - its_vpe_db_proxy_move(vpe, from, cpu); - } + from = vpe->col_idx; + vpe->col_idx = cpu; + + /* + * GICv4.1 allows us to skip VMOVP if moving to a cpu whose RD + * is sharing its VPE table with the current one. + */ + if (gic_data_rdist_cpu(cpu)->vpe_table_mask && + cpumask_test_cpu(from, gic_data_rdist_cpu(cpu)->vpe_table_mask)) + goto out; + its_send_vmovp(vpe); + its_vpe_db_proxy_move(vpe, from, cpu); + +out: irq_data_update_effective_affinity(d, cpumask_of(cpu)); return IRQ_SET_MASK_OK_DONE; -- 2.20.1