From patchwork Fri Jun 9 17:41:28 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andre Przywara X-Patchwork-Id: 9778967 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id A81D760318 for ; Fri, 9 Jun 2017 17:43:39 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 923B6286E7 for ; Fri, 9 Jun 2017 17:43:39 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 84355286E2; Fri, 9 Jun 2017 17:43:39 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 1963D286E2 for ; Fri, 9 Jun 2017 17:43:38 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dJNvK-00040Z-TR; Fri, 09 Jun 2017 17:42:14 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dJNvK-0003xt-5d for xen-devel@lists.xenproject.org; Fri, 09 Jun 2017 17:42:14 +0000 Received: from [85.158.139.211] by server-9.bemta-5.messagelabs.com id 9C/7B-01999-5FDDA395; Fri, 09 Jun 2017 17:42:13 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrGLMWRWlGSWpSXmKPExsVysyfVTffLXat Ig5ntJhbft0xmcmD0OPzhCksAYxRrZl5SfkUCa8aOH29YCjZJV2xak9LA+Eqoi5GLQ0hgM6PE /CnT2SGc5YwSCzddAnI4OdgEdCV23HzNDGKLCIRKPF3wnRmkiFngOqPE6R3z2UASwgJeEhNaN 7CA2CwCqhKnNh9gArF5Bawl3p++DGZLCMhJNJy/DzaIEyi+bc9asF4hASuJlkOX2Scwci9gZF jFqF6cWlSWWqRrqZdUlJmeUZKbmJmja2hgqpebWlycmJ6ak5hUrJecn7uJEehfBiDYwbi21fk QoyQHk5Io77QCq0ghvqT8lMqMxOKM+KLSnNTiQ4wyHBxKEryv7gDlBItS01Mr0jJzgIEGk5bg 4FES4X1xEijNW1yQmFucmQ6ROsWoKCXOuxGkTwAkkVGaB9cGC+5LjLJSwryMQIcI8RSkFuVml qDKv2IU52BUEubdBTKFJzOvBG76K6DFTECLl7yzAFlckoiQkmpgzOtV5XWujn7dvnRd3V6L1b wz3nksOeKz1kzi5+y6NfendBkI+8tPYNz9dvabKonYWW7pB76fjtjjUrXJYs2RU5nXf15YW9t 8/B6LSTq3ufGNfcY1a9axTmW71Pt9Zqy57JyQQ/MLDPnZDq/mKUlyDj9YeEZD7OUMj7x/vyd8 miH1togxftvtiUosxRmJhlrMRcWJAJYbvnlpAgAA X-Env-Sender: andre.przywara@arm.com X-Msg-Ref: server-14.tower-206.messagelabs.com!1497030132!63873409!1 X-Originating-IP: [217.140.101.70] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 9.4.19; banners=-,-,- X-VirusChecked: Checked Received: (qmail 16251 invoked from network); 9 Jun 2017 17:42:12 -0000 Received: from foss.arm.com (HELO foss.arm.com) (217.140.101.70) by server-14.tower-206.messagelabs.com with SMTP; 9 Jun 2017 17:42:12 -0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id D6EFF1596; Fri, 9 Jun 2017 10:42:11 -0700 (PDT) Received: from e104803-lin.lan (unknown [10.1.207.46]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 8E86C3F578; Fri, 9 Jun 2017 10:42:10 -0700 (PDT) From: Andre Przywara To: Julien Grall , Stefano Stabellini Date: Fri, 9 Jun 2017 18:41:28 +0100 Message-Id: <20170609174141.5068-22-andre.przywara@arm.com> X-Mailer: git-send-email 2.9.0 In-Reply-To: <20170609174141.5068-1-andre.przywara@arm.com> References: <20170609174141.5068-1-andre.przywara@arm.com> Cc: xen-devel@lists.xenproject.org, Vijaya Kumar K , Vijay Kilari , Shanker Donthineni , Manish Jaggi Subject: [Xen-devel] [PATCH v11 21/34] ARM: vITS: provide access to struct pending_irq X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" X-Virus-Scanned: ClamAV using ClamSMTP For each device we allocate one struct pending_irq for each virtual event (MSI). Provide a helper function which returns the pointer to the appropriate struct, to be able to find the right struct when given a virtual deviceID/eventID pair. Signed-off-by: Andre Przywara Acked-by: Julien Grall --- xen/arch/arm/gic-v3-its.c | 59 ++++++++++++++++++++++++++++++++++++++++ xen/include/asm-arm/gic_v3_its.h | 4 +++ 2 files changed, 63 insertions(+) diff --git a/xen/arch/arm/gic-v3-its.c b/xen/arch/arm/gic-v3-its.c index aebc257..38f0840 100644 --- a/xen/arch/arm/gic-v3-its.c +++ b/xen/arch/arm/gic-v3-its.c @@ -800,6 +800,65 @@ out: return ret; } +/* Must be called with the its_device_lock held. */ +static struct its_device *get_its_device(struct domain *d, paddr_t vdoorbell, + uint32_t vdevid) +{ + struct rb_node *node = d->arch.vgic.its_devices.rb_node; + struct its_device *dev; + + ASSERT(spin_is_locked(&d->arch.vgic.its_devices_lock)); + + while (node) + { + int cmp; + + dev = rb_entry(node, struct its_device, rbnode); + cmp = compare_its_guest_devices(dev, vdoorbell, vdevid); + + if ( !cmp ) + return dev; + + if ( cmp > 0 ) + node = node->rb_left; + else + node = node->rb_right; + } + + return NULL; +} + +static struct pending_irq *get_event_pending_irq(struct domain *d, + paddr_t vdoorbell_address, + uint32_t vdevid, + uint32_t eventid, + uint32_t *host_lpi) +{ + struct its_device *dev; + struct pending_irq *pirq = NULL; + + spin_lock(&d->arch.vgic.its_devices_lock); + dev = get_its_device(d, vdoorbell_address, vdevid); + if ( dev && eventid < dev->eventids ) + { + pirq = &dev->pend_irqs[eventid]; + if ( host_lpi ) + *host_lpi = dev->host_lpi_blocks[eventid / LPI_BLOCK] + + (eventid % LPI_BLOCK); + } + spin_unlock(&d->arch.vgic.its_devices_lock); + + return pirq; +} + +struct pending_irq *gicv3_its_get_event_pending_irq(struct domain *d, + paddr_t vdoorbell_address, + uint32_t vdevid, + uint32_t eventid) +{ + return get_event_pending_irq(d, vdoorbell_address, vdevid, eventid, NULL); +} + /* Scan the DT for any ITS nodes and create a list of host ITSes out of it. */ void gicv3_its_dt_init(const struct dt_device_node *node) { diff --git a/xen/include/asm-arm/gic_v3_its.h b/xen/include/asm-arm/gic_v3_its.h index 5db7d04..be67726 100644 --- a/xen/include/asm-arm/gic_v3_its.h +++ b/xen/include/asm-arm/gic_v3_its.h @@ -171,6 +171,10 @@ void gicv3_free_host_lpi_block(uint32_t first_lpi); void vgic_vcpu_inject_lpi(struct domain *d, unsigned int virq); +struct pending_irq *gicv3_its_get_event_pending_irq(struct domain *d, + paddr_t vdoorbell_address, + uint32_t vdevid, + uint32_t eventid); #else static inline void gicv3_its_dt_init(const struct dt_device_node *node)