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| author | CLEMENT MATHIEU--DRIF <clement.mathieu--drif@eviden.com> | 2025-05-20 07:19:01 +0000 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2025-06-01 06:38:53 -0400 |
| commit | a849ff5d6fa9d263beaecd6421fff8e21d2591c8 (patch) | |
| tree | 344b810f0772a7d26b69c7895709bec07cd8174e | |
| parent | 7e94e45296d68982d448ae57e195efcf8f66649e (diff) | |
| download | qemu-a849ff5d6fa9d263beaecd6421fff8e21d2591c8.zip qemu-a849ff5d6fa9d263beaecd6421fff8e21d2591c8.tar.gz qemu-a849ff5d6fa9d263beaecd6421fff8e21d2591c8.tar.bz2 | |
pci: Add a pci-level initialization function for IOMMU notifiers
This is meant to be used by ATS-capable devices.
Signed-off-by: Clement Mathieu--Drif <clement.mathieu--drif@eviden.com>
Message-Id: <20250520071823.764266-10-clement.mathieu--drif@eviden.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| -rw-r--r-- | hw/pci/pci.c | 17 | ||||
| -rw-r--r-- | include/hw/pci/pci.h | 33 |
2 files changed, 50 insertions, 0 deletions
diff --git a/hw/pci/pci.c b/hw/pci/pci.c index fc4954a..dfa5a02 100644 --- a/hw/pci/pci.c +++ b/hw/pci/pci.c @@ -2939,6 +2939,23 @@ AddressSpace *pci_device_iommu_address_space(PCIDevice *dev) return &address_space_memory; } +int pci_iommu_init_iotlb_notifier(PCIDevice *dev, IOMMUNotifier *n, + IOMMUNotify fn, void *opaque) +{ + PCIBus *bus; + PCIBus *iommu_bus; + int devfn; + + pci_device_get_iommu_bus_devfn(dev, &bus, &iommu_bus, &devfn); + if (iommu_bus && iommu_bus->iommu_ops->init_iotlb_notifier) { + iommu_bus->iommu_ops->init_iotlb_notifier(bus, iommu_bus->iommu_opaque, + devfn, n, fn, opaque); + return 0; + } + + return -ENODEV; +} + bool pci_device_set_iommu_device(PCIDevice *dev, HostIOMMUDevice *hiod, Error **errp) { diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h index d67ffe1..f3016fd 100644 --- a/include/hw/pci/pci.h +++ b/include/hw/pci/pci.h @@ -442,6 +442,26 @@ typedef struct PCIIOMMUOps { */ void (*get_iotlb_info)(void *opaque, uint8_t *addr_width, uint32_t *min_page_size); + /** + * @init_iotlb_notifier: initialize an IOMMU notifier. + * + * Optional callback. + * + * @bus: the #PCIBus of the PCI device. + * + * @opaque: the data passed to pci_setup_iommu(). + * + * @devfn: device and function number of the PCI device. + * + * @n: the notifier to be initialized. + * + * @fn: the callback to be installed. + * + * @user_opaque: a user pointer that can be used to track a state. + */ + void (*init_iotlb_notifier)(PCIBus *bus, void *opaque, int devfn, + IOMMUNotifier *n, IOMMUNotify fn, + void *user_opaque); } PCIIOMMUOps; AddressSpace *pci_device_iommu_address_space(PCIDevice *dev); @@ -463,6 +483,19 @@ int pci_iommu_get_iotlb_info(PCIDevice *dev, uint8_t *addr_width, uint32_t *min_page_size); /** + * pci_iommu_init_iotlb_notifier: initialize an IOMMU notifier. + * + * This function is used by devices before registering an IOTLB notifier. + * + * @dev: the device. + * @n: the notifier to be initialized. + * @fn: the callback to be installed. + * @opaque: a user pointer that can be used to track a state. + */ +int pci_iommu_init_iotlb_notifier(PCIDevice *dev, IOMMUNotifier *n, + IOMMUNotify fn, void *opaque); + +/** * pci_setup_iommu: Initialize specific IOMMU handlers for a PCIBus * * Let PCI host bridges define specific operations. |