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| author | CLEMENT MATHIEU--DRIF <clement.mathieu--drif@eviden.com> | 2025-05-20 07:18:59 +0000 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2025-06-01 06:38:53 -0400 |
| commit | 042cbc9aec7caca639dcb1a8a996406a7c572706 (patch) | |
| tree | 7930a11bff3a7396dda760993f096345348684cf /hw/pci/pci.c | |
| parent | 8ff9e1def0ef3388333b6cc639c9f958f97ebe05 (diff) | |
| download | focaccia-qemu-042cbc9aec7caca639dcb1a8a996406a7c572706.tar.gz focaccia-qemu-042cbc9aec7caca639dcb1a8a996406a7c572706.zip | |
pci: Add an API to get IOMMU's min page size and virtual address width
This kind of information is needed by devices implementing ATS in order to initialize their translation cache. Signed-off-by: Clement Mathieu--Drif <clement.mathieu--drif@eviden.com> Message-Id: <20250520071823.764266-8-clement.mathieu--drif@eviden.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/pci/pci.c')
| -rw-r--r-- | hw/pci/pci.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/hw/pci/pci.c b/hw/pci/pci.c index 1114ba8529..fc4954ac81 100644 --- a/hw/pci/pci.c +++ b/hw/pci/pci.c @@ -2970,6 +2970,23 @@ void pci_device_unset_iommu_device(PCIDevice *dev) } } +int pci_iommu_get_iotlb_info(PCIDevice *dev, uint8_t *addr_width, + uint32_t *min_page_size) +{ + 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->get_iotlb_info) { + iommu_bus->iommu_ops->get_iotlb_info(iommu_bus->iommu_opaque, + addr_width, min_page_size); + return 0; + } + + return -ENODEV; +} + void pci_setup_iommu(PCIBus *bus, const PCIIOMMUOps *ops, void *opaque) { /* |