motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-07 09:43:56 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

pci: Add a PCI-level API for PRI

Browse source 
A device can send a PRI request to the IOMMU using pci_pri_request_page.
The PRI response is sent back using the notifier managed with
pci_pri_register_notifier and pci_pri_unregister_notifier.

Signed-off-by: Clement Mathieu--Drif <clement.mathieu--drif@eviden.com>
Co-authored-by: Ethan Milon <ethan.milon@eviden.com>
Message-Id: <20250520071823.764266-12-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 07:19:04 +00:00 • committed by Michael S. Tsirkin
parent e9b457500a
commit f0f37daf8e
2 changed files with 196 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

66
hw/pci/pci.c
View file

@ -2987,6 +2987,72 @@ void pci_device_unset_iommu_device(PCIDevice *dev)
}
}
int pci_pri_request_page(PCIDevice *dev, uint32_t pasid, bool priv_req,
bool exec_req, hwaddr addr, bool lpig,
uint16_t prgi, bool is_read, bool is_write)
{
PCIBus *bus;
PCIBus *iommu_bus;
int devfn;
if (!dev->is_master ||
((pasid != PCI_NO_PASID) && !pcie_pasid_enabled(dev))) {
return -EPERM;
}
if (!pcie_pri_enabled(dev)) {
return -EPERM;
}
pci_device_get_iommu_bus_devfn(dev, &bus, &iommu_bus, &devfn);
if (iommu_bus && iommu_bus->iommu_ops->pri_request_page) {
return iommu_bus->iommu_ops->pri_request_page(bus,
iommu_bus->iommu_opaque,
devfn, pasid, priv_req,
exec_req, addr, lpig, prgi,
is_read, is_write);
}
return -ENODEV;
}
int pci_pri_register_notifier(PCIDevice *dev, uint32_t pasid,
IOMMUPRINotifier *notifier)
{
PCIBus *bus;
PCIBus *iommu_bus;
int devfn;
if (!dev->is_master ||
((pasid != PCI_NO_PASID) && !pcie_pasid_enabled(dev))) {
return -EPERM;
}
pci_device_get_iommu_bus_devfn(dev, &bus, &iommu_bus, &devfn);
if (iommu_bus && iommu_bus->iommu_ops->pri_register_notifier) {
iommu_bus->iommu_ops->pri_register_notifier(bus,
iommu_bus->iommu_opaque,
devfn, pasid, notifier);
return 0;
}
return -ENODEV;
}
void pci_pri_unregister_notifier(PCIDevice *dev, uint32_t pasid)
{
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->pri_unregister_notifier) {
iommu_bus->iommu_ops->pri_unregister_notifier(bus,
iommu_bus->iommu_opaque,
devfn, pasid);
}
}
ssize_t pci_ats_request_translation(PCIDevice *dev, uint32_t pasid,
bool priv_req, bool exec_req,
hwaddr addr, size_t length,