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=-10.0 required=3.0 tests=INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 56FBFC4CECF for ; Mon, 23 Sep 2019 18:26:40 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 1D21120B7C for ; Mon, 23 Sep 2019 18:26:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1D21120B7C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id BC3904A5A9; Mon, 23 Sep 2019 14:26:39 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id f+qxby7P2Rw7; Mon, 23 Sep 2019 14:26:38 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id AF39F4A60F; Mon, 23 Sep 2019 14:26:38 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id DC88E4A5A9 for ; Mon, 23 Sep 2019 14:26:37 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id YaxbHqfu1Zur for ; Mon, 23 Sep 2019 14:26:37 -0400 (EDT) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 78BDA4A60F for ; Mon, 23 Sep 2019 14:26:36 -0400 (EDT) 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 260F31597; Mon, 23 Sep 2019 11:26:36 -0700 (PDT) Received: from big-swifty.lan (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 5C0493F694; Mon, 23 Sep 2019 11:26:33 -0700 (PDT) From: Marc Zyngier To: kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org Subject: [PATCH 02/35] irqchip/gic-v3-its: Factor out wait_for_syncr primitive Date: Mon, 23 Sep 2019 19:25:33 +0100 Message-Id: <20190923182606.32100-3-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 Cc: Lorenzo Pieralisi , Jason Cooper , Thomas Gleixner X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu Waiting for a redistributor to have performed an operation is a common thing to do, and the idiom is already spread around. As we're going to make even more use of this, let's have a primitive that does just that. Signed-off-by: Marc Zyngier --- drivers/irqchip/irq-gic-v3-its.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 62e54f1a248b..58cb233cf138 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -1075,6 +1075,12 @@ static void lpi_write_config(struct irq_data *d, u8 clr, u8 set) dsb(ishst); } +static void wait_for_syncr(void __iomem *rdbase) +{ + while (gic_read_lpir(rdbase + GICR_SYNCR) & 1) + cpu_relax(); +} + static void lpi_update_config(struct irq_data *d, u8 clr, u8 set) { struct its_device *its_dev = irq_data_get_irq_chip_data(d); @@ -2757,8 +2763,7 @@ static void its_vpe_db_proxy_move(struct its_vpe *vpe, int from, int to) rdbase = per_cpu_ptr(gic_rdists->rdist, from)->rd_base; gic_write_lpir(vpe->vpe_db_lpi, rdbase + GICR_CLRLPIR); - while (gic_read_lpir(rdbase + GICR_SYNCR) & 1) - cpu_relax(); + wait_for_syncr(rdbase); return; } @@ -2914,8 +2919,7 @@ static void its_vpe_send_inv(struct irq_data *d) rdbase = per_cpu_ptr(gic_rdists->rdist, vpe->col_idx)->rd_base; gic_write_lpir(vpe->vpe_db_lpi, rdbase + GICR_INVLPIR); - while (gic_read_lpir(rdbase + GICR_SYNCR) & 1) - cpu_relax(); + wait_for_syncr(rdbase); } else { its_vpe_send_cmd(vpe, its_send_inv); } @@ -2957,8 +2961,7 @@ static int its_vpe_set_irqchip_state(struct irq_data *d, gic_write_lpir(vpe->vpe_db_lpi, rdbase + GICR_SETLPIR); } else { gic_write_lpir(vpe->vpe_db_lpi, rdbase + GICR_CLRLPIR); - while (gic_read_lpir(rdbase + GICR_SYNCR) & 1) - cpu_relax(); + wait_for_syncr(rdbase); } } else { if (state) -- 2.20.1 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm 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 8E6A6C4CEC4 for ; Mon, 23 Sep 2019 18:26:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6657520665 for ; Mon, 23 Sep 2019 18:26:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569263198; bh=XbLNgU9kPdlH8Fi9JQlXClvf4wOZdwwOaVg4Lg0NAEY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Tl41s021VAU33anUMZVcowLXU8ok8Hw7LaMYUvgHg8Fysk5cyuKcUB0Fl6cEVTh/N eMi8hUMPjeC5WHcEgA36fGN95u7F1gBgjdEEarNjCwpwXNJyisinDQvqIdVjHm8Nez S8F7kIn0beJIjcZU1jGWzMYvyX3hL+7/IaM7BsFs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2440448AbfIWS0h (ORCPT ); Mon, 23 Sep 2019 14:26:37 -0400 Received: from foss.arm.com ([217.140.110.172]:46638 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2438244AbfIWS0g (ORCPT ); Mon, 23 Sep 2019 14:26:36 -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 260F31597; Mon, 23 Sep 2019 11:26:36 -0700 (PDT) Received: from big-swifty.lan (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 5C0493F694; Mon, 23 Sep 2019 11:26:33 -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 02/35] irqchip/gic-v3-its: Factor out wait_for_syncr primitive Date: Mon, 23 Sep 2019 19:25:33 +0100 Message-Id: <20190923182606.32100-3-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 Waiting for a redistributor to have performed an operation is a common thing to do, and the idiom is already spread around. As we're going to make even more use of this, let's have a primitive that does just that. Signed-off-by: Marc Zyngier --- drivers/irqchip/irq-gic-v3-its.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 62e54f1a248b..58cb233cf138 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -1075,6 +1075,12 @@ static void lpi_write_config(struct irq_data *d, u8 clr, u8 set) dsb(ishst); } +static void wait_for_syncr(void __iomem *rdbase) +{ + while (gic_read_lpir(rdbase + GICR_SYNCR) & 1) + cpu_relax(); +} + static void lpi_update_config(struct irq_data *d, u8 clr, u8 set) { struct its_device *its_dev = irq_data_get_irq_chip_data(d); @@ -2757,8 +2763,7 @@ static void its_vpe_db_proxy_move(struct its_vpe *vpe, int from, int to) rdbase = per_cpu_ptr(gic_rdists->rdist, from)->rd_base; gic_write_lpir(vpe->vpe_db_lpi, rdbase + GICR_CLRLPIR); - while (gic_read_lpir(rdbase + GICR_SYNCR) & 1) - cpu_relax(); + wait_for_syncr(rdbase); return; } @@ -2914,8 +2919,7 @@ static void its_vpe_send_inv(struct irq_data *d) rdbase = per_cpu_ptr(gic_rdists->rdist, vpe->col_idx)->rd_base; gic_write_lpir(vpe->vpe_db_lpi, rdbase + GICR_INVLPIR); - while (gic_read_lpir(rdbase + GICR_SYNCR) & 1) - cpu_relax(); + wait_for_syncr(rdbase); } else { its_vpe_send_cmd(vpe, its_send_inv); } @@ -2957,8 +2961,7 @@ static int its_vpe_set_irqchip_state(struct irq_data *d, gic_write_lpir(vpe->vpe_db_lpi, rdbase + GICR_SETLPIR); } else { gic_write_lpir(vpe->vpe_db_lpi, rdbase + GICR_CLRLPIR); - while (gic_read_lpir(rdbase + GICR_SYNCR) & 1) - cpu_relax(); + wait_for_syncr(rdbase); } } else { if (state) -- 2.20.1