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virtio,pc,pci: features, cleanups, fixes
vhost-user-snd support x2APIC mode with TCG support CXL update to r3.1 fixes, cleanups all over the place. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> -----BEGIN PGP SIGNATURE----- iQFDBAABCAAtFiEEXQn9CHHI+FuUyooNKB8NuNKNVGkFAmXMoXUPHG1zdEByZWRo YXQuY29tAAoJECgfDbjSjVRpFtMIAKUKD0hzJrwOyPo4xsRUMbsB3ehIsJsMKfOK w+JWzTaojAG8ENPelWBdL2sEIs5U73VOchjLqHbH2m5sz6GJ13214amvdU/fYc8+ /dU2ZKoAmaR5L1ovKO/fq07y/J6DrITZ5tosy2i84Xa8EnsL4j3wEPNVWsDi7dna mvXUICSOOoJQ4O2YhSruKCQ8qIgF1/0Oi3u/rcrW3alSs8VQlrtQXxl6k+LbYqek +Fytco3jMRHPvQ+GYUIwGuHjN15ghArcvbsV0GIa+24BPY5h7YbDYGbfasePT5OK zDz51jitkoyDrQr+OzwOEe/X5+dVGhayRXfMtU5Qm53IE3y61qc= =K4b1 -----END PGP SIGNATURE----- Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging virtio,pc,pci: features, cleanups, fixes vhost-user-snd support x2APIC mode with TCG support CXL update to r3.1 fixes, cleanups all over the place. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> # -----BEGIN PGP SIGNATURE----- # # iQFDBAABCAAtFiEEXQn9CHHI+FuUyooNKB8NuNKNVGkFAmXMoXUPHG1zdEByZWRo # YXQuY29tAAoJECgfDbjSjVRpFtMIAKUKD0hzJrwOyPo4xsRUMbsB3ehIsJsMKfOK # w+JWzTaojAG8ENPelWBdL2sEIs5U73VOchjLqHbH2m5sz6GJ13214amvdU/fYc8+ # /dU2ZKoAmaR5L1ovKO/fq07y/J6DrITZ5tosy2i84Xa8EnsL4j3wEPNVWsDi7dna # mvXUICSOOoJQ4O2YhSruKCQ8qIgF1/0Oi3u/rcrW3alSs8VQlrtQXxl6k+LbYqek # +Fytco3jMRHPvQ+GYUIwGuHjN15ghArcvbsV0GIa+24BPY5h7YbDYGbfasePT5OK # zDz51jitkoyDrQr+OzwOEe/X5+dVGhayRXfMtU5Qm53IE3y61qc= # =K4b1 # -----END PGP SIGNATURE----- # gpg: Signature made Wed 14 Feb 2024 11:18:13 GMT # gpg: using RSA key 5D09FD0871C8F85B94CA8A0D281F0DB8D28D5469 # gpg: issuer "mst@redhat.com" # gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" [full] # gpg: aka "Michael S. Tsirkin <mst@redhat.com>" [full] # Primary key fingerprint: 0270 606B 6F3C DF3D 0B17 0970 C350 3912 AFBE 8E67 # Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA 8A0D 281F 0DB8 D28D 5469 * tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu: (60 commits) MAINTAINERS: Switch to my Enfabrica email virtio-gpu-rutabaga.c: override resource_destroy method virtio-gpu.c: add resource_destroy class method hw/display/virtio-gpu.c: use reset_bh class method hw/smbios: Fix port connector option validation hw/smbios: Fix OEM strings table option validation virtio-gpu: Correct virgl_renderer_resource_get_info() error check hw/cxl: Standardize all references on CXL r3.1 and minor updates hw/cxl: Update mailbox status registers. hw/cxl: Update RAS Capability Definitions for version 3. hw/cxl: Update link register definitions. hw/cxl: Update HDM Decoder capability to version 3 tests/acpi: Update DSDT.cxl to reflect change _STA return value. hw/i386: Fix _STA return value for ACPI0017 tests/acpi: Allow update of DSDT.cxl hw/mem/cxl_type3: Fix potential divide by zero reported by coverity hw/cxl: Pass NULL for a NULL MemoryRegionOps hw/cxl: Pass CXLComponentState to cache_mem_ops hw/cxl/device: read from register values in mdev_reg_read() hw/cxl/mbox: Remove dead code ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell
commit
5767815218
84 changed files with 2004 additions and 1910 deletions
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@ -94,6 +94,7 @@ Emulated Devices
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devices/virtio-gpu.rst
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devices/virtio-pmem.rst
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devices/virtio-snd.rst
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devices/vhost-user-input.rst
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devices/vhost-user-rng.rst
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devices/canokey.rst
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devices/usb-u2f.rst
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@ -411,5 +411,4 @@ References
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- Consortium website for specifications etc:
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http://www.computeexpresslink.org
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- Compute Express link Revision 2 specification, October 2020
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- CEDT CFMWS & QTG _DSM ECN May 2021
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- Compute Express Link (CXL) Specification, Revision 3.1, August 2023
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45
docs/system/devices/vhost-user-input.rst
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45
docs/system/devices/vhost-user-input.rst
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@ -0,0 +1,45 @@
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.. _vhost_user_input:
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QEMU vhost-user-input - Input emulation
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=======================================
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This document describes the setup and usage of the Virtio input device.
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The Virtio input device is a paravirtualized device for input events.
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Description
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-----------
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The vhost-user-input device implementation was designed to work with a daemon
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polling on input devices and passes input events to the guest.
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QEMU provides a backend implementation in contrib/vhost-user-input.
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Linux kernel support
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--------------------
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Virtio input requires a guest Linux kernel built with the
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``CONFIG_VIRTIO_INPUT`` option.
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Examples
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--------
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The backend daemon should be started first:
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::
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host# vhost-user-input --socket-path=input.sock \
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--evdev-path=/dev/input/event17
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The QEMU invocation needs to create a chardev socket to communicate with the
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backend daemon and access the VirtIO queues with the guest over the
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:ref:`shared memory <shared_memory_object>`.
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::
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host# qemu-system \
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-chardev socket,path=/tmp/input.sock,id=mouse0 \
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-device vhost-user-input-pci,chardev=mouse0 \
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-m 4096 \
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-object memory-backend-file,id=mem,size=4G,mem-path=/dev/shm,share=on \
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-numa node,memdev=mem \
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...
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@ -1,3 +1,5 @@
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.. _vhost_user_rng:
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QEMU vhost-user-rng - RNG emulation
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===================================
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@ -8,13 +8,81 @@ outside of QEMU itself. To do this there are a number of things
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required.
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vhost-user device
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===================
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=================
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These are simple stub devices that ensure the VirtIO device is visible
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to the guest. The code is mostly boilerplate although each device has
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a ``chardev`` option which specifies the ID of the ``--chardev``
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device that connects via a socket to the vhost-user *daemon*.
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Each device will have an virtio-mmio and virtio-pci variant. See your
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platform details for what sort of virtio bus to use.
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.. list-table:: vhost-user devices
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:widths: 20 20 60
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:header-rows: 1
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* - Device
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- Type
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- Notes
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* - vhost-user-blk
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- Block storage
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- See contrib/vhost-user-blk
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* - vhost-user-fs
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- File based storage driver
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- See https://gitlab.com/virtio-fs/virtiofsd
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* - vhost-user-gpio
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- Proxy gpio pins to host
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- See https://github.com/rust-vmm/vhost-device
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* - vhost-user-gpu
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- GPU driver
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- See contrib/vhost-user-gpu
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* - vhost-user-i2c
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- Proxy i2c devices to host
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- See https://github.com/rust-vmm/vhost-device
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* - vhost-user-input
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- Generic input driver
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- :ref:`vhost_user_input`
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* - vhost-user-rng
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- Entropy driver
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- :ref:`vhost_user_rng`
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* - vhost-user-scmi
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- System Control and Management Interface
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- See https://github.com/rust-vmm/vhost-device
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* - vhost-user-snd
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- Audio device
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- See https://github.com/rust-vmm/vhost-device/staging
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* - vhost-user-scsi
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- SCSI based storage
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- See contrib/vhost-user-scsi
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* - vhost-user-vsock
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- Socket based communication
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- See https://github.com/rust-vmm/vhost-device
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The referenced *daemons* are not exhaustive, any conforming backend
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implementing the device and using the vhost-user protocol should work.
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vhost-user-device
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^^^^^^^^^^^^^^^^^
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The vhost-user-device is a generic development device intended for
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expert use while developing new backends. The user needs to specify
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all the required parameters including:
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- Device ``virtio-id``
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- The ``num_vqs`` it needs and their ``vq_size``
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- The ``config_size`` if needed
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.. note::
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To prevent user confusion you cannot currently instantiate
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vhost-user-device without first patching out::
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/* Reason: stop inexperienced users confusing themselves */
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dc->user_creatable = false;
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in ``vhost-user-device.c`` and ``vhost-user-device-pci.c`` file and
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rebuilding.
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vhost-user daemon
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=================
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@ -23,6 +91,8 @@ following the :ref:`vhost_user_proto`. There are a number of daemons
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that can be built when enabled by the project although any daemon that
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meets the specification for a given device can be used.
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.. _shared_memory_object:
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Shared memory object
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====================
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