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=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS 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 A5D57C742A1 for ; Thu, 11 Jul 2019 17:43:48 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7FA14208E4 for ; Thu, 11 Jul 2019 17:43:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7FA14208E4 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:44256 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hld6h-0006rd-DW for qemu-devel@archiver.kernel.org; Thu, 11 Jul 2019 13:43:47 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:38924) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hld5E-0000g2-JU for qemu-devel@nongnu.org; Thu, 11 Jul 2019 13:42:17 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hld59-0005vd-Me for qemu-devel@nongnu.org; Thu, 11 Jul 2019 13:42:13 -0400 Received: from mx1.redhat.com ([209.132.183.28]:58224) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hld4y-0005ap-3K; Thu, 11 Jul 2019 13:42:01 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 5B64E30821B2; Thu, 11 Jul 2019 17:41:56 +0000 (UTC) Received: from laptop.redhat.com (ovpn-116-46.ams2.redhat.com [10.36.116.46]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6A9ED60600; Thu, 11 Jul 2019 17:41:53 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, peter.maydell@linaro.org Date: Thu, 11 Jul 2019 19:39:24 +0200 Message-Id: <20190711173933.31203-21-eric.auger@redhat.com> In-Reply-To: <20190711173933.31203-1-eric.auger@redhat.com> References: <20190711173933.31203-1-eric.auger@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.47]); Thu, 11 Jul 2019 17:41:56 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [RFC v5 20/29] vfio/pci: Register handler for iommu fault X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: drjones@redhat.com, yi.l.liu@intel.com, mst@redhat.com, jean-philippe.brucker@arm.com, zhangfei.gao@foxmail.com, peterx@redhat.com, alex.williamson@redhat.com, vincent.stehle@arm.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" We use the new extended IRQ VFIO_IRQ_TYPE_NESTED type and VFIO_IRQ_SUBTYPE_DMA_FAULT subtype to set/unset a notifier for physical DMA faults. The associated eventfd is triggered, in nested mode, whenever a fault is detected at IOMMU physical level. The actual handler will be implemented in subsequent patches. Signed-off-by: Eric Auger --- v4 -> v5: - index_to_str now returns the index name, ie. DMA_FAULT - use the extended IRQ v3 -> v4: - check VFIO_PCI_DMA_FAULT_IRQ_INDEX is supported at kernel level before attempting to set signaling for it. --- hw/vfio/pci.c | 81 ++++++++++++++++++++++++++++++++++++++++++++++++++- hw/vfio/pci.h | 7 +++++ 2 files changed, 87 insertions(+), 1 deletion(-) diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index 45e007575e..19702cdbbf 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -2761,6 +2761,76 @@ static PCIPASIDOps vfio_pci_pasid_ops =3D { .set_pasid_table =3D vfio_iommu_set_pasid_table, }; =20 +static void vfio_dma_fault_notifier_handler(void *opaque) +{ + VFIOPCIExtIRQ *ext_irq =3D opaque; + + if (!event_notifier_test_and_clear(&ext_irq->notifier)) { + return; + } +} + +static int vfio_register_ext_irq_handler(VFIOPCIDevice *vdev, + uint32_t type, uint32_t subtype= , + IOHandler *handler) +{ + int32_t fd, ext_irq_index, index; + struct vfio_irq_info *irq_info; + Error *err =3D NULL; + EventNotifier *n; + int ret; + + ret =3D vfio_get_dev_irq_info(&vdev->vbasedev, type, subtype, &irq_i= nfo); + if (ret) { + return ret; + } + index =3D irq_info->index; + ext_irq_index =3D irq_info->index - VFIO_PCI_NUM_IRQS; + g_free(irq_info); + + vdev->ext_irqs[ext_irq_index].vdev =3D vdev; + vdev->ext_irqs[ext_irq_index].index =3D index; + n =3D &vdev->ext_irqs[ext_irq_index].notifier; + + ret =3D event_notifier_init(n, 0); + if (ret) { + error_report("vfio: Unable to init event notifier for ext irq %d= (%d)", + ext_irq_index, ret); + return ret; + } + + fd =3D event_notifier_get_fd(n); + qemu_set_fd_handler(fd, vfio_dma_fault_notifier_handler, NULL, + &vdev->ext_irqs[ext_irq_index]); + + ret =3D vfio_set_irq_signaling(&vdev->vbasedev, index, 0, + VFIO_IRQ_SET_ACTION_TRIGGER, fd, &err); + if (ret) { + error_reportf_err(err, VFIO_MSG_PREFIX, vdev->vbasedev.name); + qemu_set_fd_handler(fd, NULL, NULL, vdev); + event_notifier_cleanup(n); + } + return ret; +} + +static void vfio_unregister_ext_irq_notifiers(VFIOPCIDevice *vdev) +{ + VFIODevice *vbasedev =3D &vdev->vbasedev; + Error *err =3D NULL; + int i; + + for (i =3D 0; i < vbasedev->num_irqs - VFIO_PCI_NUM_IRQS; i++) { + if (vfio_set_irq_signaling(vbasedev, i + VFIO_PCI_NUM_IRQS , 0, + VFIO_IRQ_SET_ACTION_TRIGGER, -1, &err= )) { + error_reportf_err(err, VFIO_MSG_PREFIX, vdev->vbasedev.name)= ; + } + qemu_set_fd_handler(event_notifier_get_fd(&vdev->ext_irqs[i].not= ifier), + NULL, NULL, vdev); + event_notifier_cleanup(&vdev->ext_irqs[i].notifier); + } + g_free(vdev->ext_irqs); +} + static void vfio_realize(PCIDevice *pdev, Error **errp) { VFIOPCIDevice *vdev =3D PCI_VFIO(pdev); @@ -2771,7 +2841,7 @@ static void vfio_realize(PCIDevice *pdev, Error **e= rrp) ssize_t len; struct stat st; int groupid; - int i, ret; + int i, ret, nb_ext_irqs; bool is_mdev; =20 if (!vdev->vbasedev.sysfsdev) { @@ -2859,6 +2929,11 @@ static void vfio_realize(PCIDevice *pdev, Error **= errp) goto error; } =20 + nb_ext_irqs =3D vdev->vbasedev.num_irqs - VFIO_PCI_NUM_IRQS; + if (nb_ext_irqs > 0) { + vdev->ext_irqs =3D g_new0(VFIOPCIExtIRQ, nb_ext_irqs); + } + vfio_populate_device(vdev, &err); if (err) { error_propagate(errp, err); @@ -3060,6 +3135,9 @@ static void vfio_realize(PCIDevice *pdev, Error **e= rrp) =20 vfio_register_err_notifier(vdev); vfio_register_req_notifier(vdev); + vfio_register_ext_irq_handler(vdev, VFIO_IRQ_TYPE_NESTED, + VFIO_IRQ_SUBTYPE_DMA_FAULT, + vfio_dma_fault_notifier_handler); vfio_setup_resetfn_quirk(vdev); =20 pci_setup_pasid_ops(pdev, &vfio_pci_pasid_ops); @@ -3100,6 +3178,7 @@ static void vfio_exitfn(PCIDevice *pdev) =20 vfio_unregister_req_notifier(vdev); vfio_unregister_err_notifier(vdev); + vfio_unregister_ext_irq_notifiers(vdev); pci_device_set_intx_routing_notifier(&vdev->pdev, NULL); vfio_disable_interrupts(vdev); if (vdev->intx.mmap_timer) { diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h index 834a90d646..893d074375 100644 --- a/hw/vfio/pci.h +++ b/hw/vfio/pci.h @@ -113,6 +113,12 @@ typedef struct VFIOMSIXInfo { unsigned long *pending; } VFIOMSIXInfo; =20 +typedef struct VFIOPCIExtIRQ { + struct VFIOPCIDevice *vdev; + EventNotifier notifier; + uint32_t index; +} VFIOPCIExtIRQ; + typedef struct VFIOPCIDevice { PCIDevice pdev; VFIODevice vbasedev; @@ -134,6 +140,7 @@ typedef struct VFIOPCIDevice { PCIHostDeviceAddress host; EventNotifier err_notifier; EventNotifier req_notifier; + VFIOPCIExtIRQ *ext_irqs; int (*resetfn)(struct VFIOPCIDevice *); uint32_t vendor_id; uint32_t device_id; --=20 2.20.1