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virtio,pci,pc: features,fixes
pci: Initial support for SPDM Responders
cxl: Add support for scan media, feature commands, device patrol scrub
control, DDR5 ECS control, firmware updates
virtio: in-order support
virtio-net: support for SR-IOV emulation (note: known issues on s390,
might get reverted if not fixed)
smbios: memory device size is now configurable per Machine
cpu: architecture agnostic code to support vCPU Hotplug
Fixes, cleanups all over the place.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging
virtio,pci,pc: features,fixes
pci: Initial support for SPDM Responders
cxl: Add support for scan media, feature commands, device patrol scrub
control, DDR5 ECS control, firmware updates
virtio: in-order support
virtio-net: support for SR-IOV emulation (note: known issues on s390,
might get reverted if not fixed)
smbios: memory device size is now configurable per Machine
cpu: architecture agnostic code to support vCPU Hotplug
Fixes, cleanups all over the place.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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* tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu: (61 commits)
hw/nvme: Add SPDM over DOE support
backends: Initial support for SPDM socket support
hw/pci: Add all Data Object Types defined in PCIe r6.0
tests/acpi: Add expected ACPI AML files for RISC-V
tests/qtest/bios-tables-test.c: Enable basic testing for RISC-V
tests/acpi: Add empty ACPI data files for RISC-V
tests/qtest/bios-tables-test.c: Remove the fall back path
tests/acpi: update expected DSDT blob for aarch64 and microvm
acpi/gpex: Create PCI link devices outside PCI root bridge
tests/acpi: Allow DSDT acpi table changes for aarch64
hw/riscv/virt-acpi-build.c: Update the HID of RISC-V UART
hw/riscv/virt-acpi-build.c: Add namespace devices for PLIC and APLIC
virtio-iommu: Add trace point on virtio_iommu_detach_endpoint_from_domain
hw/vfio/common: Add vfio_listener_region_del_iommu trace event
virtio-iommu: Remove the end point on detach
virtio-iommu: Free [host_]resv_ranges on unset_iommu_devices
virtio-iommu: Remove probe_done
Revert "virtio-iommu: Clear IOMMUDevice when VFIO device is unplugged"
gdbstub: Add helper function to unregister GDB register space
physmem: Add helper function to destroy CPU AddressSpace
...
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson
commit
5885bcef3d
81 changed files with 2486 additions and 288 deletions
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@ -39,3 +39,4 @@ or Hypervisor.Framework.
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multi-process
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confidential-guest-support
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vm-templating
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sriov
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36
docs/system/sriov.rst
Normal file
36
docs/system/sriov.rst
Normal file
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@ -0,0 +1,36 @@
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.. SPDX-License-Identifier: GPL-2.0-or-later
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Compsable SR-IOV device
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=======================
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SR-IOV (Single Root I/O Virtualization) is an optional extended capability of a
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PCI Express device. It allows a single physical function (PF) to appear as
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multiple virtual functions (VFs) for the main purpose of eliminating software
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overhead in I/O from virtual machines.
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There are devices with predefined SR-IOV configurations, but it is also possible
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to compose an SR-IOV device yourself. Composing an SR-IOV device is currently
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only supported by virtio-net-pci.
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Users can configure an SR-IOV-capable virtio-net device by adding
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virtio-net-pci functions to a bus. Below is a command line example:
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.. code-block:: shell
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-netdev user,id=n -netdev user,id=o
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-netdev user,id=p -netdev user,id=q
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-device pcie-root-port,id=b
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-device virtio-net-pci,bus=b,addr=0x0.0x3,netdev=q,sriov-pf=f
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-device virtio-net-pci,bus=b,addr=0x0.0x2,netdev=p,sriov-pf=f
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-device virtio-net-pci,bus=b,addr=0x0.0x1,netdev=o,sriov-pf=f
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-device virtio-net-pci,bus=b,addr=0x0.0x0,netdev=n,id=f
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The VFs specify the paired PF with ``sriov-pf`` property. The PF must be
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added after all VFs. It is the user's responsibility to ensure that VFs have
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function numbers larger than one of the PF, and that the function numbers
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have a consistent stride.
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You may also need to perform additional steps to activate the SR-IOV feature on
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your guest. For Linux, refer to [1]_.
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.. [1] https://docs.kernel.org/PCI/pci-iov-howto.html
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