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 9C455C4CEC4 for ; Mon, 23 Sep 2019 18:27:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 754A721783 for ; Mon, 23 Sep 2019 18:27:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569263244; bh=OZuXW98InzBr96Wno7+X3Tyxl33BE23ztG2Wvc4QMro=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=TvpTNjQaN6h7cBXrJ5ADYSVDEEke872DfZZIBYofClddChrFKZfpDs0DO5xugnJI1 5ajkDpbErRqUWdZIzTRtq5eE68kzQAMMUzmnEPlvbB71s6q8Aven8I9f24/V96VoEQ DoU6jsZYOmMCurwHfx09UqDsD2J4/3K+6k+hsTck= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2502344AbfIWS1X (ORCPT ); Mon, 23 Sep 2019 14:27:23 -0400 Received: from foss.arm.com ([217.140.110.172]:46902 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2502300AbfIWS1W (ORCPT ); Mon, 23 Sep 2019 14:27:22 -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 39C9E1B8E; Mon, 23 Sep 2019 11:27:22 -0700 (PDT) Received: from big-swifty.lan (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 25C0F3F694; Mon, 23 Sep 2019 11:27:18 -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 15/35] irqchip/gic-v4.1: Add mask/unmask doorbell callbacks Date: Mon, 23 Sep 2019 19:25:46 +0100 Message-Id: <20190923182606.32100-16-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 masking/unmasking doorbells on GICv4.1 relies on a new INVDB command, which broadcasts the invalidation to all RDs. Implement the new command as well as the masking callbacks, and plug the whole thing into the v4.1 VPE irqchip. Signed-off-by: Marc Zyngier --- drivers/irqchip/irq-gic-v3-its.c | 60 ++++++++++++++++++++++++++++++ include/linux/irqchip/arm-gic-v3.h | 3 +- 2 files changed, 62 insertions(+), 1 deletion(-) diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 4098ef6d030a..36653db372bc 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -309,6 +309,10 @@ struct its_cmd_desc { u16 seq_num; u16 its_list; } its_vmovp_cmd; + + struct { + struct its_vpe *vpe; + } its_invdb_cmd; }; }; @@ -750,6 +754,21 @@ static struct its_vpe *its_build_vmovp_cmd(struct its_node *its, return valid_vpe(its, desc->its_vmovp_cmd.vpe); } +static struct its_vpe *its_build_invdb_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + if (WARN_ON(!is_v4_1(its))) + return NULL; + + its_encode_cmd(cmd, GITS_CMD_INVDB); + its_encode_vpeid(cmd, desc->its_invdb_cmd.vpe->vpe_id); + + its_fixup_cmd(cmd); + + return valid_vpe(its, desc->its_invdb_cmd.vpe); +} + static u64 its_cmd_ptr_to_offset(struct its_node *its, struct its_cmd_block *ptr) { @@ -1117,6 +1136,14 @@ static void its_send_vinvall(struct its_node *its, struct its_vpe *vpe) its_send_single_vcommand(its, its_build_vinvall_cmd, &desc); } +static void its_send_invdb(struct its_node *its, struct its_vpe *vpe) +{ + struct its_cmd_desc desc; + + desc.its_invdb_cmd.vpe = vpe; + its_send_single_vcommand(its, its_build_invdb_cmd, &desc); +} + /* * irqchip functions - assumes MSI, mostly. */ @@ -3403,6 +3430,37 @@ static struct irq_chip its_vpe_irq_chip = { .irq_set_vcpu_affinity = its_vpe_set_vcpu_affinity, }; +static void its_vpe_4_1_send_inv(struct irq_data *d) +{ + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); + struct its_node *its; + + /* + * GICv4.1 wants doorbells to be invalidated using the + * INVDB command in order to be broadcast to all RDs. Send + * it to the first valid ITS, and let the HW do its magic. + */ + list_for_each_entry(its, &its_nodes, entry) { + if (!is_v4_1(its)) + continue; + + its_send_invdb(its, vpe); + break; + } +} + +static void its_vpe_4_1_mask_irq(struct irq_data *d) +{ + lpi_write_config(d->parent_data, LPI_PROP_ENABLED, 0); + its_vpe_4_1_send_inv(d); +} + +static void its_vpe_4_1_unmask_irq(struct irq_data *d) +{ + lpi_write_config(d->parent_data, 0, LPI_PROP_ENABLED); + its_vpe_4_1_send_inv(d); +} + static int its_vpe_4_1_set_vcpu_affinity(struct irq_data *d, void *vcpu_info) { struct its_cmd_info *info = vcpu_info; @@ -3424,6 +3482,8 @@ static int its_vpe_4_1_set_vcpu_affinity(struct irq_data *d, void *vcpu_info) static struct irq_chip its_vpe_4_1_irq_chip = { .name = "GICv4.1-vpe", + .irq_mask = its_vpe_4_1_mask_irq, + .irq_unmask = its_vpe_4_1_unmask_irq, .irq_eoi = irq_chip_eoi_parent, .irq_set_affinity = its_vpe_set_affinity, .irq_set_vcpu_affinity = its_vpe_4_1_set_vcpu_affinity, diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h index f1d6de53e09b..8157737053e4 100644 --- a/include/linux/irqchip/arm-gic-v3.h +++ b/include/linux/irqchip/arm-gic-v3.h @@ -484,8 +484,9 @@ #define GITS_CMD_VMAPTI GITS_CMD_GICv4(GITS_CMD_MAPTI) #define GITS_CMD_VMOVI GITS_CMD_GICv4(GITS_CMD_MOVI) #define GITS_CMD_VSYNC GITS_CMD_GICv4(GITS_CMD_SYNC) -/* VMOVP is the odd one, as it doesn't have a physical counterpart */ +/* VMOVP and INVDB are the odd ones, as they dont have a physical counterpart */ #define GITS_CMD_VMOVP GITS_CMD_GICv4(2) +#define GITS_CMD_INVDB GITS_CMD_GICv4(0xe) /* * ITS error numbers -- 2.20.1