From: Eric Auger <eric.auger@redhat.com>
To: eric.auger.pro@gmail.com, eric.auger@redhat.com,
qemu-devel@nongnu.org, qemu-arm@nongnu.org,
peter.maydell@linaro.org, mst@redhat.com,
alex.williamson@redhat.com, jacob.jun.pan@linux.intel.com,
yi.l.liu@intel.com
Cc: jean-philippe@linaro.org, tnowicki@marvell.com, maz@kernel.org,
zhangfei.gao@foxmail.com, peterx@redhat.com,
shameerali.kolothum.thodi@huawei.com, zhangfei.gao@linaro.org,
bbhushan2@marvell.com, will@kernel.org
Subject: [RFC v6 15/24] vfio/pci: Register handler for iommu fault
Date: Fri, 20 Mar 2020 17:58:31 +0100 [thread overview]
Message-ID: <20200320165840.30057-16-eric.auger@redhat.com> (raw)
In-Reply-To: <20200320165840.30057-1-eric.auger@redhat.com>
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 <eric.auger@redhat.com>
---
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 6f2d5696c3..7579f476b0 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -2780,6 +2780,76 @@ static PCIPASIDOps vfio_pci_pasid_ops = {
.set_pasid_table = vfio_iommu_set_pasid_table,
};
+static void vfio_dma_fault_notifier_handler(void *opaque)
+{
+ VFIOPCIExtIRQ *ext_irq = 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 = NULL;
+ EventNotifier *n;
+ int ret;
+
+ ret = vfio_get_dev_irq_info(&vdev->vbasedev, type, subtype, &irq_info);
+ if (ret) {
+ return ret;
+ }
+ index = irq_info->index;
+ ext_irq_index = irq_info->index - VFIO_PCI_NUM_IRQS;
+ g_free(irq_info);
+
+ vdev->ext_irqs[ext_irq_index].vdev = vdev;
+ vdev->ext_irqs[ext_irq_index].index = index;
+ n = &vdev->ext_irqs[ext_irq_index].notifier;
+
+ ret = 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 = event_notifier_get_fd(n);
+ qemu_set_fd_handler(fd, vfio_dma_fault_notifier_handler, NULL,
+ &vdev->ext_irqs[ext_irq_index]);
+
+ ret = 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 = &vdev->vbasedev;
+ Error *err = NULL;
+ int i;
+
+ for (i = 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].notifier),
+ 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 = PCI_VFIO(pdev);
@@ -2790,7 +2860,7 @@ static void vfio_realize(PCIDevice *pdev, Error **errp)
ssize_t len;
struct stat st;
int groupid;
- int i, ret;
+ int i, ret, nb_ext_irqs;
bool is_mdev;
if (!vdev->vbasedev.sysfsdev) {
@@ -2890,6 +2960,11 @@ static void vfio_realize(PCIDevice *pdev, Error **errp)
goto error;
}
+ nb_ext_irqs = vdev->vbasedev.num_irqs - VFIO_PCI_NUM_IRQS;
+ if (nb_ext_irqs > 0) {
+ vdev->ext_irqs = g_new0(VFIOPCIExtIRQ, nb_ext_irqs);
+ }
+
vfio_populate_device(vdev, &err);
if (err) {
error_propagate(errp, err);
@@ -3094,6 +3169,9 @@ static void vfio_realize(PCIDevice *pdev, Error **errp)
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);
pci_setup_pasid_ops(pdev, &vfio_pci_pasid_ops);
@@ -3145,6 +3223,7 @@ static void vfio_exitfn(PCIDevice *pdev)
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);
if (vdev->irqchip_change_notifier.notify) {
kvm_irqchip_remove_change_notifier(&vdev->irqchip_change_notifier);
diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h
index 0da7a20a7e..56f0fabb33 100644
--- a/hw/vfio/pci.h
+++ b/hw/vfio/pci.h
@@ -113,6 +113,12 @@ typedef struct VFIOMSIXInfo {
unsigned long *pending;
} VFIOMSIXInfo;
+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;
--
2.20.1
next prev parent reply other threads:[~2020-03-20 17:05 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-20 16:58 [RFC v6 00/24] vSMMUv3/pSMMUv3 2 stage VFIO integration Eric Auger
2020-03-20 16:58 ` [RFC v6 01/24] update-linux-headers: Import iommu.h Eric Auger
2020-03-26 12:58 ` Liu, Yi L
2020-03-26 17:51 ` Auger Eric
2020-03-20 16:58 ` [RFC v6 02/24] header update against 5.6.0-rc3 and IOMMU/VFIO nested stage APIs Eric Auger
2020-03-20 16:58 ` [RFC v6 03/24] memory: Add IOMMU_ATTR_VFIO_NESTED IOMMU memory region attribute Eric Auger
2020-03-20 16:58 ` [RFC v6 04/24] memory: Add IOMMU_ATTR_MSI_TRANSLATE " Eric Auger
2020-03-20 16:58 ` [RFC v6 05/24] memory: Introduce IOMMU Memory Region inject_faults API Eric Auger
2020-03-26 13:13 ` Liu, Yi L
2020-03-20 16:58 ` [RFC v6 06/24] memory: Add arch_id and leaf fields in IOTLBEntry Eric Auger
2020-03-20 16:58 ` [RFC v6 07/24] iommu: Introduce generic header Eric Auger
2020-03-20 16:58 ` [RFC v6 08/24] pci: introduce PCIPASIDOps to PCIDevice Eric Auger
2020-03-26 13:01 ` Liu, Yi L
2020-03-20 16:58 ` [RFC v6 09/24] vfio: Force nested if iommu requires it Eric Auger
2020-03-31 6:34 ` Liu, Yi L
2020-03-31 8:04 ` Auger Eric
2020-03-31 8:34 ` Liu, Yi L
2020-03-20 16:58 ` [RFC v6 10/24] vfio: Introduce hostwin_from_range helper Eric Auger
2020-03-20 16:58 ` [RFC v6 11/24] vfio: Introduce helpers to DMA map/unmap a RAM section Eric Auger
2020-03-20 16:58 ` [RFC v6 12/24] vfio: Set up nested stage mappings Eric Auger
2020-03-20 16:58 ` [RFC v6 13/24] vfio: Pass stage 1 MSI bindings to the host Eric Auger
2020-03-20 16:58 ` [RFC v6 14/24] vfio: Helper to get IRQ info including capabilities Eric Auger
2020-03-20 16:58 ` Eric Auger [this message]
2020-03-20 16:58 ` [RFC v6 16/24] vfio/pci: Set up the DMA FAULT region Eric Auger
2020-03-20 16:58 ` [RFC v6 17/24] vfio/pci: Implement the DMA fault handler Eric Auger
2020-03-20 16:58 ` [RFC v6 18/24] hw/arm/smmuv3: Advertise MSI_TRANSLATE attribute Eric Auger
2020-03-20 16:58 ` [RFC v6 19/24] hw/arm/smmuv3: Store the PASID table GPA in the translation config Eric Auger
2020-03-20 16:58 ` [RFC v6 20/24] hw/arm/smmuv3: Fill the IOTLBEntry arch_id on NH_VA invalidation Eric Auger
2020-03-20 16:58 ` [RFC v6 21/24] hw/arm/smmuv3: Fill the IOTLBEntry leaf field " Eric Auger
2020-03-20 16:58 ` [RFC v6 22/24] hw/arm/smmuv3: Pass stage 1 configurations to the host Eric Auger
2020-03-20 16:58 ` [RFC v6 23/24] hw/arm/smmuv3: Implement fault injection Eric Auger
2020-03-20 16:58 ` [RFC v6 24/24] hw/arm/smmuv3: Allow MAP notifiers Eric Auger
2020-03-25 11:35 ` [RFC v6 00/24] vSMMUv3/pSMMUv3 2 stage VFIO integration Shameerali Kolothum Thodi
2020-03-25 12:42 ` Auger Eric
2020-04-03 10:45 ` Auger Eric
2020-04-03 12:10 ` Shameerali Kolothum Thodi
2020-03-31 6:42 ` Zhangfei Gao
2020-03-31 8:12 ` Auger Eric
2020-03-31 8:24 ` Zhangfei Gao
2020-04-02 16:46 ` Auger Eric
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