motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-08 18:23:57 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

pci: Add an API to get IOMMU's min page size and virtual address width

Browse source 
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>
This commit is contained in:
CLEMENT MATHIEU--DRIF 2025-05-20 07:18:59 +00:00 • committed by Michael S. Tsirkin
parent 8ff9e1def0
commit 042cbc9aec
2 changed files with 43 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

17
hw/pci/pci.c
View file

@ -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)
{
/*