search for: viommu_cread

...; + return -EOVERFLOW; > + } > + > + pci_write_config_byte(dev, cfg + VPCI_FIELD(bar), cap->bar); > + pci_write_config_dword(dev, cfg + VPCI_FIELD(length), length); > + pci_write_config_dword(dev, cfg + VPCI_FIELD(offset), offset); > + return 0; > +} > + > +static u32 viommu_cread(struct pci_dev *dev, int cfg, > + struct viommu_cap_config *cap, u32 length, u32 offset) > +{ > + u8 val8; > + u16 val16; > + u32 val32; > + int out = cfg + sizeof(struct virtio_pci_cap); > + > + if (viommu_switch_pci_cfg(dev, cfg, cap, length, offset)) > + return 0; &...

...n", + length, offset, cap->length); + return -EOVERFLOW; + } + + pci_write_config_byte(dev, cfg + VPCI_FIELD(bar), cap->bar); + pci_write_config_dword(dev, cfg + VPCI_FIELD(length), length); + pci_write_config_dword(dev, cfg + VPCI_FIELD(offset), offset); + return 0; +} + +static u32 viommu_cread(struct pci_dev *dev, int cfg, + struct viommu_cap_config *cap, u32 length, u32 offset) +{ + u8 val8; + u16 val16; + u32 val32; + int out = cfg + sizeof(struct virtio_pci_cap); + + if (viommu_switch_pci_cfg(dev, cfg, cap, length, offset)) + return 0; + + switch (length) { + case 1: + pci_read_co...

I'm seeking feedback on multi-platform support for virtio-iommu. At the moment only devicetree (DT) is supported and we don't have a pleasant solution for other platforms. Once we figure out the topology description, x86 support is trivial. Since the IOMMU manages memory accesses from other devices, the guest kernel needs to initialize the IOMMU before endpoints start issuing DMA.

I'm seeking feedback on multi-platform support for virtio-iommu. At the moment only devicetree (DT) is supported and we don't have a pleasant solution for other platforms. Once we figure out the topology description, x86 support is trivial. Since the IOMMU manages memory accesses from other devices, the guest kernel needs to initialize the IOMMU before endpoints start issuing DMA.