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Date: Mon, 18 Feb 2019 14:55:02 +0100 From: Eric Auger <eric.auger@...hat.com> To: eric.auger.pro@...il.com, eric.auger@...hat.com, iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org, kvm@...r.kernel.org, kvmarm@...ts.cs.columbia.edu, joro@...tes.org, alex.williamson@...hat.com, jacob.jun.pan@...ux.intel.com, yi.l.liu@...ux.intel.com, jean-philippe.brucker@....com, will.deacon@....com, robin.murphy@....com Cc: kevin.tian@...el.com, ashok.raj@...el.com, marc.zyngier@....com, christoffer.dall@....com, peter.maydell@...aro.org Subject: [PATCH v4 21/22] vfio-pci: Add VFIO_PCI_DMA_FAULT_IRQ_INDEX Add a new VFIO_PCI_DMA_FAULT_IRQ_INDEX index. This allows to set/unset an eventfd that will be triggered when DMA translation faults are detected at physical level when the nested mode is used. Signed-off-by: Eric Auger <eric.auger@...hat.com> --- drivers/vfio/pci/vfio_pci.c | 3 +++ drivers/vfio/pci/vfio_pci_intrs.c | 19 +++++++++++++++++++ include/uapi/linux/vfio.h | 1 + 3 files changed, 23 insertions(+) diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c index 3aaa14eb5518..0886d427f403 100644 --- a/drivers/vfio/pci/vfio_pci.c +++ b/drivers/vfio/pci/vfio_pci.c @@ -698,6 +698,8 @@ static int vfio_pci_get_irq_count(struct vfio_pci_device *vdev, int irq_type) return 1; } else if (irq_type == VFIO_PCI_REQ_IRQ_INDEX) { return 1; + } else if (irq_type == VFIO_PCI_DMA_FAULT_IRQ_INDEX) { + return 1; } return 0; @@ -1025,6 +1027,7 @@ static long vfio_pci_ioctl(void *device_data, switch (info.index) { case VFIO_PCI_INTX_IRQ_INDEX ... VFIO_PCI_MSIX_IRQ_INDEX: case VFIO_PCI_REQ_IRQ_INDEX: + case VFIO_PCI_DMA_FAULT_IRQ_INDEX: break; case VFIO_PCI_ERR_IRQ_INDEX: if (pci_is_pcie(vdev->pdev)) diff --git a/drivers/vfio/pci/vfio_pci_intrs.c b/drivers/vfio/pci/vfio_pci_intrs.c index 1c46045b0e7f..28a96117daf3 100644 --- a/drivers/vfio/pci/vfio_pci_intrs.c +++ b/drivers/vfio/pci/vfio_pci_intrs.c @@ -622,6 +622,18 @@ static int vfio_pci_set_req_trigger(struct vfio_pci_device *vdev, count, flags, data); } +static int vfio_pci_set_dma_fault_trigger(struct vfio_pci_device *vdev, + unsigned index, unsigned start, + unsigned count, uint32_t flags, + void *data) +{ + if (index != VFIO_PCI_DMA_FAULT_IRQ_INDEX || start != 0 || count > 1) + return -EINVAL; + + return vfio_pci_set_ctx_trigger_single(&vdev->dma_fault_trigger, + count, flags, data); +} + int vfio_pci_set_irqs_ioctl(struct vfio_pci_device *vdev, uint32_t flags, unsigned index, unsigned start, unsigned count, void *data) @@ -671,6 +683,13 @@ int vfio_pci_set_irqs_ioctl(struct vfio_pci_device *vdev, uint32_t flags, break; } break; + case VFIO_PCI_DMA_FAULT_IRQ_INDEX: + switch (flags & VFIO_IRQ_SET_ACTION_TYPE_MASK) { + case VFIO_IRQ_SET_ACTION_TRIGGER: + func = vfio_pci_set_dma_fault_trigger; + break; + } + break; } if (!func) diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h index 40b7aec8fefa..b47f65df5b86 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -555,6 +555,7 @@ enum { VFIO_PCI_MSIX_IRQ_INDEX, VFIO_PCI_ERR_IRQ_INDEX, VFIO_PCI_REQ_IRQ_INDEX, + VFIO_PCI_DMA_FAULT_IRQ_INDEX, VFIO_PCI_NUM_IRQS }; -- 2.20.1
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