From: Eric Auger <eric.auger@redhat.com>
To: eric.auger.pro@gmail.com, eric.auger@redhat.com,
iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu,
joro@8bytes.org, alex.williamson@redhat.com,
jacob.jun.pan@linux.intel.com, yi.l.liu@intel.com,
jean-philippe.brucker@arm.com, will.deacon@arm.com,
robin.murphy@arm.com
Cc: peter.maydell@linaro.org, kevin.tian@intel.com,
vincent.stehle@arm.com, ashok.raj@intel.com,
marc.zyngier@arm.com, tina.zhang@intel.com
Subject: [PATCH v9 10/11] vfio/pci: Register and allow DMA FAULT IRQ signaling
Date: Thu, 11 Jul 2019 15:56:24 +0200 [thread overview]
Message-ID: <20190711135625.20684-11-eric.auger@redhat.com> (raw)
In-Reply-To: <20190711135625.20684-1-eric.auger@redhat.com>
Register the VFIO_IRQ_TYPE_NESTED/VFIO_IRQ_SUBTYPE_DMA_FAULT
IRQ that allows to signal a nested mode DMA fault.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
drivers/vfio/pci/vfio_pci.c | 22 ++++++++++++++++++++--
1 file changed, 20 insertions(+), 2 deletions(-)
diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index dcc246202094..a9df964e40c6 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -344,7 +344,7 @@ int vfio_pci_iommu_dev_fault_handler(struct iommu_fault *fault, void *data)
struct iommu_fault *new =
(struct iommu_fault *)(vdev->fault_pages + reg->offset +
reg->head * reg->entry_size);
- int head, tail, size;
+ int head, tail, size, ext_irq_index;
int ret = 0;
if (fault->type != IOMMU_FAULT_DMA_UNRECOV)
@@ -365,7 +365,19 @@ int vfio_pci_iommu_dev_fault_handler(struct iommu_fault *fault, void *data)
reg->head = (head + 1) % size;
unlock:
mutex_unlock(&vdev->fault_queue_lock);
- return ret;
+ if (ret)
+ return ret;
+
+ ext_irq_index = vfio_pci_get_ext_irq_index(vdev, VFIO_IRQ_TYPE_NESTED,
+ VFIO_IRQ_SUBTYPE_DMA_FAULT);
+ if (ext_irq_index < 0)
+ return -EINVAL;
+
+ mutex_lock(&vdev->igate);
+ if (vdev->ext_irqs[ext_irq_index].trigger)
+ eventfd_signal(vdev->ext_irqs[ext_irq_index].trigger, 1);
+ mutex_unlock(&vdev->igate);
+ return 0;
}
#define DMA_FAULT_RING_LENGTH 512
@@ -518,6 +530,12 @@ static int vfio_pci_enable(struct vfio_pci_device *vdev)
if (ret)
goto disable_exit;
+ ret = vfio_pci_register_irq(vdev, VFIO_IRQ_TYPE_NESTED,
+ VFIO_IRQ_SUBTYPE_DMA_FAULT,
+ VFIO_IRQ_INFO_EVENTFD);
+ if (ret)
+ goto disable_exit;
+
vfio_pci_probe_mmaps(vdev);
return 0;
--
2.20.1
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iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2019-07-11 14:06 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-11 13:56 [PATCH v9 00/11] SMMUv3 Nested Stage Setup (VFIO part) Eric Auger
2019-07-11 13:56 ` [PATCH v9 01/11] vfio: VFIO_IOMMU_SET_PASID_TABLE Eric Auger
2019-07-11 13:56 ` [PATCH v9 02/11] vfio: VFIO_IOMMU_CACHE_INVALIDATE Eric Auger
2019-07-11 13:56 ` [PATCH v9 03/11] vfio: VFIO_IOMMU_SET_MSI_BINDING Eric Auger
2019-07-11 13:56 ` [PATCH v9 04/11] vfio/pci: Add VFIO_REGION_TYPE_NESTED region type Eric Auger
2019-07-11 13:56 ` [PATCH v9 05/11] vfio/pci: Register an iommu fault handler Eric Auger
2019-07-11 13:56 ` [PATCH v9 06/11] vfio/pci: Allow to mmap the fault queue Eric Auger
2019-07-11 13:56 ` [PATCH v9 07/11] vfio: Use capability chains to handle device specific irq Eric Auger
2019-07-11 13:56 ` [PATCH v9 08/11] vfio: Add new IRQ for DMA fault reporting Eric Auger
2019-07-11 13:56 ` [PATCH v9 09/11] vfio/pci: Add framework for custom interrupt indices Eric Auger
2019-07-11 13:56 ` Eric Auger [this message]
2019-07-11 13:56 ` [PATCH v9 11/11] vfio: Document nested stage control Eric Auger
2019-07-12 7:38 ` [PATCH v9 00/11] SMMUv3 Nested Stage Setup (VFIO part) zhangfei.gao
2019-11-12 11:08 ` Shameerali Kolothum Thodi
2019-11-12 11:28 ` Auger Eric
2019-11-12 13:06 ` Shameerali Kolothum Thodi
2019-11-12 13:21 ` Auger Eric
2019-11-12 14:21 ` Shameerali Kolothum Thodi
2019-11-12 17:56 ` Shameerali Kolothum Thodi
2019-11-12 20:34 ` Auger Eric
2019-11-13 16:24 ` Shameerali Kolothum Thodi
[not found] ` <a35234a6-e386-fc8e-fcc4-5db4601b00d2@marvell.com>
[not found] ` <3741c034-08f1-9dbb-ab06-434f3a8bd782@redhat.com>
2020-03-03 12:57 ` zhangfei
2020-03-03 13:14 ` Auger Eric
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