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/linux-6.14.4/drivers/virtio/
DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
5 config VIRTIO config
9 This option is selected by any driver which implements the virtio
16 Modern PCI device implementation. This module implements the
18 PCI device with possible vendor specific extensions. Any
19 module that selects this module must depend on PCI.
24 Legacy PCI device (Virtio PCI Card 0.9.x Draft and older device)
27 which are based on legacy PCI device. Any module that selects this
28 module must depend on PCI.
31 bool "Virtio drivers"
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Dvirtio_pci_legacy_dev.c1 // SPDX-License-Identifier: GPL-2.0-or-later
6 #include <linux/pci.h>
10 * vp_legacy_probe: probe the legacy virtio pci device, note that the
11 * caller is required to enable PCI device before calling this function.
12 * @ldev: the legacy virtio-pci device
18 struct pci_dev *pci_dev = ldev->pci_dev; in vp_legacy_probe()
22 if (pci_dev->device < 0x1000 || pci_dev->device > 0x103f) in vp_legacy_probe()
23 return -ENODEV; in vp_legacy_probe()
25 if (pci_dev->revision != VIRTIO_PCI_ABI_VERSION) in vp_legacy_probe()
26 return -ENODEV; in vp_legacy_probe()
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Dvirtio_pci_modern_dev.c1 // SPDX-License-Identifier: GPL-2.0-or-later
5 #include <linux/pci.h>
9 * vp_modern_map_capability - map a part of virtio pci capability
10 * @mdev: the modern virtio-pci device
26 struct pci_dev *dev = mdev->pci_dev; in vp_modern_map_capability()
40 if (bar >= PCI_STD_NUM_BARS || !(mdev->modern_bars & (1 << bar))) { in vp_modern_map_capability()
41 dev_err(&dev->dev, in vp_modern_map_capability()
47 dev_err(&dev->dev, in vp_modern_map_capability()
53 if (length - start < minlen) { in vp_modern_map_capability()
54 dev_err(&dev->dev, in vp_modern_map_capability()
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Dvirtio_pci_legacy.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Virtio PCI driver - legacy device support
5 * This module allows virtio devices to be used over a virtual PCI device.
20 /* virtio config->get_features() implementation */
27 return vp_legacy_get_features(&vp_dev->ldev); in vp_get_features()
30 /* virtio config->finalize_features() implementation */
39 BUG_ON((u32)vdev->features != vdev->features); in vp_finalize_features()
42 vp_legacy_set_features(&vp_dev->ldev, vdev->features); in vp_finalize_features()
47 /* virtio config->get() implementation */
52 void __iomem *ioaddr = vp_dev->ldev.ioaddr + in vp_get()
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Dvirtio_pci_common.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
5 * Virtio PCI driver - APIs for common functionality for all device versions
7 * This module allows virtio devices to be used over a virtual PCI device.
21 #include <linux/pci.h>
24 #include <linux/virtio.h>
41 /* MSI-X vector (or none) */
80 * PCI common config num_queues field
86 /* MSI-X support */
95 /* Vectors allocated, excluding per-vq vectors if any */
114 /* Constants for MSI-X */
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/linux-6.14.4/Documentation/driver-api/virtio/
Dvirtio.rst1 .. SPDX-License-Identifier: GPL-2.0
6 Virtio on Linux
12 Virtio is an open standard that defines a protocol for communication
14 Types") of the virtio spec (`[1]`_). Originally developed as a standard
20 devices provided by the hypervisor, which exposes them as virtio devices
21 via standard mechanisms such as PCI.
24 Device - Driver communication: virtqueues
27 Although the virtio devices are really an abstraction layer in the
29 using a specific transport method -- PCI, MMIO or CCW -- that is
30 orthogonal to the device itself. The virtio spec defines these transport
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/linux-6.14.4/drivers/vfio/pci/virtio/
DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
3 tristate "VFIO support for VIRTIO NET PCI VF devices"
7 This provides migration support for VIRTIO NET PCI VF devices
9 SR-IOV PF device to support specific VIRTIO extensions,
11 beyond vfio-pci.
15 other use cases are dis-recommended.
20 bool "Legacy I/O support for VIRTIO NET PCI VF devices"
24 This extends the virtio-vfio-pci driver to support legacy I/O
25 access, allowing use of legacy virtio drivers with VIRTIO NET
26 PCI VF devices. Legacy I/O support requires the SR-IOV PF
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Dmain.c1 // SPDX-License-Identifier: GPL-2.0-only
9 #include <linux/pci.h>
25 struct vfio_pci_core_device *vdev = &virtvdev->core_device; in virtiovf_pci_open_device()
85 .name = "virtio-vfio-pci-lm",
105 .name = "virtio-vfio-pci-trans-lm",
125 .name = "virtio-vfio-pci",
152 if (pdev->is_virtfn) { in virtiovf_pci_probe()
164 &pdev->dev, ops); in virtiovf_pci_probe()
171 dev_set_drvdata(&pdev->dev, &virtvdev->core_device); in virtiovf_pci_probe()
172 ret = vfio_pci_core_register_device(&virtvdev->core_device); in virtiovf_pci_probe()
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DMakefile1 # SPDX-License-Identifier: GPL-2.0-only
2 obj-$(CONFIG_VIRTIO_VFIO_PCI) += virtio-vfio-pci.o
3 virtio-vfio-pci-y := main.o migrate.o
4 virtio-vfio-pci-$(CONFIG_VIRTIO_VFIO_PCI_ADMIN_LEGACY) += legacy_io.o
/linux-6.14.4/Documentation/devicetree/bindings/virtio/
Dpci-iommu.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/virtio/pci-iommu.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: virtio-iommu device using the virtio-pci transport
10 - Jean-Philippe Brucker <jean-[email protected]>
13 When virtio-iommu uses the PCI transport, its programming interface is
14 discovered dynamically by the PCI probing infrastructure. However the
16 masters. Therefore, the PCI root complex that hosts the virtio-iommu
20 virtio-iommu node doesn't have an "iommus" property, and is omitted from
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Dvirtio-device.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/virtio/virtio-device.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Virtio device
10 - Viresh Kumar <[email protected]>
13 These bindings are applicable to virtio devices irrespective of the bus they
14 are bound to, like mmio or pci.
16 # We need a select here so we don't match all nodes with 'virtio,mmio'
19 pattern: "^virtio,device[0-9a-f]{1,8}$"
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/linux-6.14.4/drivers/xen/
DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
32 2) control domain: xl mem-max <target-domain> <maxmem>
35 3) control domain: xl mem-set <target-domain> <memory>
51 …SUBSYSTEM=="memory", ACTION=="add", RUN+="/bin/sh -c '[ -f /sys$devpath/state ] && echo online > /…
145 bool "Add support for dma-buf grant access device driver extension"
150 dma-buf implementation. With this extension grant references to
151 the pages of an imported dma-buf can be exported for other domain
153 converted into a local dma-buf for local export.
156 tristate "User-space grant reference allocator driver"
162 or as part of an inter-domain shared memory channel.
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/linux-6.14.4/Documentation/virt/
Dne_overview.rst1 .. SPDX-License-Identifier: GPL-2.0
29 1. An enclave abstraction process - a user space process running in the primary
33 There is a NE emulated PCI device exposed to the primary VM. The driver for this
34 new PCI device is included in the NE driver.
36 The ioctl logic is mapped to PCI device commands e.g. the NE_START_ENCLAVE ioctl
37 maps to an enclave start PCI command. The PCI device commands are then
42 2. The enclave itself - a VM running on the same host as the primary VM that
58 using virtio-vsock [5]. The primary VM has virtio-pci vsock emulated device,
59 while the enclave VM has a virtio-mmio vsock emulated device. The vsock device
60 uses eventfd for signaling. The enclave VM sees the usual interfaces - local
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/linux-6.14.4/Documentation/networking/
Dnet_failover.rst1 .. SPDX-License-Identifier: GPL-2.0
19 'pci' device. The user accesses the network interface via 'failover' netdev.
28 virtio-net accelerated datapath: STANDBY mode
31 net_failover enables hypervisor controlled accelerated datapath to virtio-net
35 feature on the virtio-net interface and assign the same MAC address to both
36 virtio-net and VF interfaces.
45 <model type='virtio'/>
49 <alias name='ua-backup0'/>
54 <address type='pci' domain='0x0000' bus='0x42' slot='0x02' function='0x5'/>
56 <teaming type='transient' persistent='ua-backup0'/>
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/linux-6.14.4/drivers/vdpa/
DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
7 datapath which complies with virtio specifications with
55 virtio dataplane traffic to hardware.
74 of virtio net datapath such that descriptors put on the ring will
87 cat /sys/kernel/debug/mlx5/mlx5_core.sf.1/vdpa-0/rx/untagged/ucast/packets
88 cat /sys/kernel/debug/mlx5/mlx5_core.sf.1/vdpa-0/rx/untagged/mcast/bytes
91 tristate "Virtio PCI bridge vDPA driver"
95 This kernel module bridges virtio PCI device to vDPA bus.
103 virtio 0.9.5 specification.
111 # If HWMON=n the driver can be compiled either as a module or built-in.
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/linux-6.14.4/drivers/vdpa/solidrun/
Dsnet_vdpa.h1 /* SPDX-License-Identifier: GPL-2.0-only */
5 * Copyright (C) 2022-2023 SolidRun
7 * Author: Alvaro Karsz <alvaro.karsz@solid-run.com>
14 #include <linux/pci.h>
18 #define SNET_ERR(pdev, fmt, ...) dev_err(&(pdev)->dev, "%s"fmt, "snet_vdpa: ", ##__VA_ARGS__)
19 #define SNET_WARN(pdev, fmt, ...) dev_warn(&(pdev)->dev, "%s"fmt, "snet_vdpa: ", ##__VA_ARGS__)
20 #define SNET_INFO(pdev, fmt, ...) dev_info(&(pdev)->dev, "%s"fmt, "snet_vdpa: ", ##__VA_ARGS__)
21 #define SNET_DBG(pdev, fmt, ...) dev_dbg(&(pdev)->dev, "%s"fmt, "snet_vdpa: ", ##__VA_ARGS__)
22 #define SNET_HAS_FEATURE(s, f) ((s)->negotiated_features & BIT_ULL(f))
24 #define SNET_CFG_VER(snet, ver) ((snet)->psnet->negotiated_cfg_ver >= (ver))
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/linux-6.14.4/Documentation/networking/device_drivers/ethernet/amd/
Dpds_vdpa.rst1 .. SPDX-License-Identifier: GPL-2.0+
2 .. note: can be edited and viewed with /usr/bin/formiko-vim
5 PCI vDPA driver for the AMD/Pensando(R) DSC adapter family
16 a vDPA device for use by the virtio network stack. It is used with
17 the Pensando Virtual Function devices that offer vDPA and virtio queue
19 and VF PCI handling as well as for device configuration services.
25 depends on the ``pds_core`` driver to create and enable SR-IOV Virtual
31 .. code-block:: bash
39 PF_BDF=`ls /sys/module/pds_core/drivers/pci\:pds_core/*/sriov_numvfs | awk -F / '{print $7}'`
42 devlink dev param set pci/$PF_BDF name enable_vnet cmode runtime value true
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/linux-6.14.4/drivers/gpu/drm/virtio/
Dvirtgpu_drv.c31 #include <linux/pci.h>
46 static int virtio_gpu_modeset = -1;
53 struct pci_dev *pdev = to_pci_dev(dev->dev); in virtio_gpu_pci_quirk()
54 const char *pname = dev_name(&pdev->dev); in virtio_gpu_pci_quirk()
58 DRM_INFO("pci: %s detected at %s\n", in virtio_gpu_pci_quirk()
59 vga ? "virtio-vga" : "virtio-gpu-pci", in virtio_gpu_pci_quirk()
75 if (drm_firmware_drivers_only() && virtio_gpu_modeset == -1) in virtio_gpu_probe()
76 return -EINVAL; in virtio_gpu_probe()
79 return -EINVAL; in virtio_gpu_probe()
82 * The virtio-gpu device is a virtual device that doesn't have DMA in virtio_gpu_probe()
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/linux-6.14.4/tools/virtio/virtio-trace/
DREADME1 Trace Agent for virtio-trace
6 - splice a page of ring-buffer to read_pipe without memory copying
7 - splice the page from write_pipe to virtio-console without memory copying
8 - write trace data to stdout by using -o option
9 - controlled by start/stop orders from a Host
18 5) The read/write threads start to read trace data from ring-buffers and
19 write the data to virtio-serial.
28 Makefile: Makefile of trace agent for virtio-trace
29 trace-agent.c: includes main function, sets up for operating trace agent
30 trace-agent.h: includes all structures and some macros
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/linux-6.14.4/include/linux/
Dvirtio_pci_modern.h1 /* SPDX-License-Identifier: GPL-2.0 */
5 #include <linux/pci.h>
9 * struct virtio_pci_modern_device - info for modern PCI virtio
10 * @pci_dev: Ptr to the PCI device struct
11 * @common: Position of the common capability in the PCI config
12 * @device: Device-specific data (non-legacy mode)
13 * @notify_base: Base of vq notifications (non-legacy mode)
16 * @notify_len: So we can sanity-check accesses
17 * @device_len: So we can sanity-check accesses
18 * @notify_map_cap: Capability for when we need to map notifications per-vq
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/linux-6.14.4/arch/um/drivers/
Dvirt-pci.c1 // SPDX-License-Identifier: GPL-2.0
7 #include <linux/pci.h>
8 #include <linux/virtio.h>
14 #include <linux/virtio-uml.h>
24 /* for MSI-X we have a 32-bit payload */
76 if (!test_and_set_bit(i, dev->used_bufs)) in um_pci_get_buf()
88 if (buf == &dev->bufs[UM_PCI_WRITE_BUFS]) { in um_pci_free_buf()
89 kfree(dev->extra_ptrs[UM_PCI_WRITE_BUFS]); in um_pci_free_buf()
90 dev->extra_ptrs[UM_PCI_WRITE_BUFS] = NULL; in um_pci_free_buf()
95 if (buf == &dev->bufs[i]) { in um_pci_free_buf()
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/linux-6.14.4/tools/
DMakefile1 # SPDX-License-Identifier: GPL-2.0
12 @echo ' acpi - ACPI tools'
13 @echo ' bpf - misc BPF tools'
14 @echo ' counter - counter tools'
15 @echo ' cpupower - a tool for all things x86 CPU power'
16 @echo ' debugging - tools for debugging'
17 @echo ' firewire - the userspace part of nosy, an IEEE-1394 traffic sniffer'
18 @echo ' firmware - Firmware tools'
19 @echo ' freefall - laptop accelerometer program for disk protection'
20 @echo ' gpio - GPIO tools'
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/linux-6.14.4/Documentation/translations/zh_CN/virt/
Dne_overview.rst1 .. SPDX-License-Identifier: GPL-2.0
2 .. include:: ../disclaimer-zh_CN.rst
57 enclave通过本地通信通道与主虚拟机进行通信，使用virtio-vsock[5]。主虚拟机有
58 virtio-pci vsock模拟设备，而飞地虚拟机有virtio-mmio vsock模拟设备。vsock
60 virtio-vsock设备获得中断。virtio-mmio设备被放置在典型的4 GiB以下的内存中。
76 连接到主虚拟机的vsock CID和一个预定义的端口--9000，以发送一个心跳值--0xb7。这
83 [1] https://aws.amazon.com/ec2/nitro/nitro-enclaves/
84 [2] https://www.kernel.org/doc/html/latest/admin-guide/mm/hugetlbpage.html
86 [4] https://www.kernel.org/doc/html/latest/admin-guide/kernel-parameters.html
87 [5] https://man7.org/linux/man-pages/man7/vsock.7.html
/linux-6.14.4/include/uapi/linux/
Dvirtio_mmio.h2 * Virtio platform device driver
6 * Based on Virtio PCI driver by Anthony Liguori, copyright IBM Corp. 2007
42 /* Magic value ("virt" string) - Read Only */
45 /* Virtio device version - Read Only */
48 /* Virtio device ID - Read Only */
51 /* Virtio vendor ID - Read Only */
55 * (32 bits per set) - Read Only */
58 /* Device (host) features set selector - Write Only */
62 * (32 bits per set) - Write Only */
65 /* Activated features set selector - Write Only */
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/linux-6.14.4/drivers/vfio/pci/
DMakefile1 # SPDX-License-Identifier: GPL-2.0-only
3 vfio-pci-core-y := vfio_pci_core.o vfio_pci_intrs.o vfio_pci_rdwr.o vfio_pci_config.o
4 vfio-pci-core-$(CONFIG_VFIO_PCI_ZDEV_KVM) += vfio_pci_zdev.o
5 obj-$(CONFIG_VFIO_PCI_CORE) += vfio-pci-core.o
7 vfio-pci-y := vfio_pci.o
8 vfio-pci-$(CONFIG_VFIO_PCI_IGD) += vfio_pci_igd.o
9 obj-$(CONFIG_VFIO_PCI) += vfio-pci.o
11 obj-$(CONFIG_MLX5_VFIO_PCI) += mlx5/
13 obj-$(CONFIG_HISI_ACC_VFIO_PCI) += hisilicon/
15 obj-$(CONFIG_PDS_VFIO_PCI) += pds/
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