Hi Jean, On 8/10/21 10:45 AM, Jean-Philippe Brucker wrote: > Allow instantiating a virtio-iommu device on ACPI systems by adding a > Virtual I/O Translation table (VIOT). Enable x86 support for VIOT.
Don't you need your other patch "virtio-iommu: Default to bypass during boot"? Without this latter, for me the guest fails to boot. Thanks Eric > > With a simple configuration the table contains a virtio-iommu-pci node > and a pci-range node: > > qemu-system-aarch64 -M virt -bios QEMU_EFI.fd > -device virtio-iommu ... > > $ iasl -d ... > [000h 0000 4] Signature : "VIOT" > > [024h 0036 2] Node count : 0002 > [026h 0038 2] Node offset : 0030 > > [030h 0048 1] Type : 03 [VirtIO-PCI IOMMU] > [032h 0050 2] Length : 0010 > [034h 0052 2] PCI Segment : 0000 > [036h 0054 2] PCI BDF number : 0030 > > [040h 0064 1] Type : 01 [PCI Range] > [042h 0066 2] Length : 0018 > [044h 0068 4] Endpoint start : 00000000 > [048h 0072 2] PCI Segment start : 0000 > [04Ah 0074 2] PCI Segment end : 0000 > [04Ch 0076 2] PCI BDF start : 0000 > [04Eh 0078 2] PCI BDF end : 00FF > [050h 0080 2] Output node : 0030 > > With a more complex topology multiple PCI Range nodes describe the system: > > qemu-system-aarch64 -bios QEMU_EFI.fd -device virtio-iommu > -M virt,default_bus_bypass_iommu=true > -device pxb-pcie,bus_nr=0x10,id=pcie.1000,bus=pcie.0 > -device pxb-pcie,bus_nr=0x20,id=pcie.2000,bus=pcie.0,bypass_iommu=true > -device pxb-pcie,bus_nr=0x30,id=pcie.3000,bus=pcie.0 > > [024h 0036 2] Node count : 0003 > [026h 0038 2] Node offset : 0030 > > [030h 0048 1] Type : 03 [VirtIO-PCI IOMMU] > [032h 0050 2] Length : 0010 > [034h 0052 2] PCI Segment : 0000 > [036h 0054 2] PCI BDF number : 0020 > > [040h 0064 1] Type : 01 [PCI Range] > [042h 0066 2] Length : 0018 > [044h 0068 4] Endpoint start : 00003000 > [048h 0072 2] PCI Segment start : 0000 > [04Ah 0074 2] PCI Segment end : 0000 > [04Ch 0076 2] PCI BDF start : 3000 > [04Eh 0078 2] PCI BDF end : 32FF > [050h 0080 2] Output node : 0030 > > [058h 0088 1] Type : 01 [PCI Range] > [05Ah 0090 2] Length : 0018 > [05Ch 0092 4] Endpoint start : 00001000 > [060h 0096 2] PCI Segment start : 0000 > [062h 0098 2] PCI Segment end : 0000 > [064h 0100 2] PCI BDF start : 1000 > [066h 0102 2] PCI BDF end : 11FF > [068h 0104 2] Output node : 0030 > > > The VIOT table description will be in the next release of ACPI. > In the meantime you can find a description at > https://jpbrucker.net/virtio-iommu/viot/viot-v9.pdf > Linux support for VIOT was added in version 5.14 > > Eric Auger (1): > pc: Allow instantiating a virtio-iommu device > > Jean-Philippe Brucker (5): > acpi: Add VIOT structure definitions > hw/acpi: Add VIOT table > hw/arm/virt-acpi-build: Add VIOT table for virtio-iommu > hw/arm/virt: Remove device tree restriction for virtio-iommu > pc: Add VIOT table for virtio-iommu > > hw/acpi/viot.h | 13 ++++++ > include/hw/acpi/acpi-defs.h | 60 ++++++++++++++++++++++++++ > include/hw/i386/pc.h | 2 + > hw/acpi/viot.c | 82 ++++++++++++++++++++++++++++++++++++ > hw/arm/virt-acpi-build.c | 7 +++ > hw/arm/virt.c | 10 +---- > hw/i386/acpi-build.c | 5 +++ > hw/i386/pc.c | 18 +++++++- > hw/virtio/virtio-iommu-pci.c | 7 --- > hw/acpi/Kconfig | 4 ++ > hw/acpi/meson.build | 1 + > hw/arm/Kconfig | 1 + > hw/i386/Kconfig | 1 + > 13 files changed, 195 insertions(+), 16 deletions(-) > create mode 100644 hw/acpi/viot.h > create mode 100644 hw/acpi/viot.c >
