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/Linux-v5.15/drivers/virtio/
DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
2 config VIRTIO config
5 This option is selected by any driver which implements the virtio
18 Modern PCI device implementation. This module implements the
20 PCI device with possible vendor specific extensions. Any
21 module that selects this module must depend on PCI.
24 bool "Virtio drivers"
30 tristate "PCI driver for virtio devices"
31 depends on PCI
33 select VIRTIO
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Dvirtio_pci_modern_dev.c1 // SPDX-License-Identifier: GPL-2.0-or-later
5 #include <linux/pci.h>
8 * vp_modern_map_capability - map a part of virtio pci capability
9 * @mdev: the modern virtio-pci device
25 struct pci_dev *dev = mdev->pci_dev; in vp_modern_map_capability()
39 dev_err(&dev->dev, in vp_modern_map_capability()
45 if (length - start < minlen) { in vp_modern_map_capability()
46 dev_err(&dev->dev, in vp_modern_map_capability()
52 length -= start; in vp_modern_map_capability()
55 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.
19 /* virtio config->get_features() implementation */
26 return ioread32(vp_dev->ioaddr + VIRTIO_PCI_HOST_FEATURES); in vp_get_features()
29 /* virtio config->finalize_features() implementation */
38 BUG_ON((u32)vdev->features != vdev->features); in vp_finalize_features()
41 iowrite32(vdev->features, vp_dev->ioaddr + VIRTIO_PCI_GUEST_FEATURES); in vp_finalize_features()
46 /* virtio config->get() implementation */
51 void __iomem *ioaddr = vp_dev->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>
39 /* MSI-X vector (or none) */
49 /* In legacy mode, these two point to within ->legacy. */
54 /* the IO mapping for the PCI config space */
61 /* array of all queues for house-keeping */
64 /* MSI-X support */
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Dvirtio.c1 // SPDX-License-Identifier: GPL-2.0-only
2 #include <linux/virtio.h>
10 /* Unique numbering for virtio devices. */
17 return sprintf(buf, "0x%04x\n", dev->id.device); in device_show()
25 return sprintf(buf, "0x%04x\n", dev->id.vendor); in vendor_show()
33 return sprintf(buf, "0x%08x\n", dev->config->get_status(dev)); in status_show()
41 return sprintf(buf, "virtio:d%08Xv%08X\n", in modalias_show()
42 dev->id.device, dev->id.vendor); in modalias_show()
55 for (i = 0; i < sizeof(dev->features)*8; i++) in features_show()
76 if (id->device != dev->id.device && id->device != VIRTIO_DEV_ANY_ID) in virtio_id_match()
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Dvirtio_pci_common.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Virtio PCI driver - common functionality for all device versions
5 * This module allows virtio devices to be used over a virtual PCI device.
24 "Force legacy mode for transitional virtio 1 devices");
33 if (vp_dev->intx_enabled) in vp_synchronize_vectors()
34 synchronize_irq(vp_dev->pci_dev->irq); in vp_synchronize_vectors()
36 for (i = 0; i < vp_dev->msix_vectors; ++i) in vp_synchronize_vectors()
37 synchronize_irq(pci_irq_vector(vp_dev->pci_dev, i)); in vp_synchronize_vectors()
45 iowrite16(vq->index, (void __iomem *)vq->priv); in vp_notify()
54 virtio_config_changed(&vp_dev->vdev); in vp_config_changed()
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Dvirtio_pci_modern.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Virtio PCI driver - modern (virtio 1.0) device support
5 * This module allows virtio devices to be used over a virtual PCI device.
26 return vp_modern_get_features(&vp_dev->mdev); in vp_get_features()
32 struct pci_dev *pci_dev = vp_dev->pci_dev; in vp_transport_features()
39 /* virtio config->finalize_features() implementation */
43 u64 features = vdev->features; in vp_finalize_features()
52 dev_err(&vdev->dev, "virtio: device uses modern interface " in vp_finalize_features()
54 return -EINVAL; in vp_finalize_features()
57 vp_modern_set_features(&vp_dev->mdev, vdev->features); in vp_finalize_features()
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Dvirtio_mmio.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Virtio memory mapped device driver
5 * Copyright 2011-2014, ARM Ltd.
7 * This module allows virtio devices to be used over a virtual, memory mapped
15 * .name = "virtio-mmio",
16 * .id = -1,
34 * compatible = "virtio,mmio";
39 * 3. Kernel module (or command line) parameter. Can be used more than once -
52 * Based on Virtio PCI driver by Anthony Liguori, copyright IBM Corp. 2007
55 #define pr_fmt(fmt) "virtio-mmio: " fmt
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/Linux-v5.15/Documentation/devicetree/bindings/virtio/
Diommu.txt1 * virtio IOMMU PCI device
3 When virtio-iommu uses the PCI transport, its programming interface is
4 discovered dynamically by the PCI probing infrastructure. However the
6 masters. Therefore, the PCI root complex that hosts the virtio-iommu
11 - compatible: Should be "virtio,pci-iommu"
12 - reg: PCI address of the IOMMU. As defined in the PCI Bus
13 Binding reference [1], the reg property is a five-cell
18 - #iommu-cells: Each platform DMA master managed by the IOMMU is assigned
20 For virtio-iommu, #iommu-cells must be 1.
24 - DMA from the IOMMU device isn't managed by another IOMMU. Therefore the
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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 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Virtio device bindings
10 - Viresh Kumar <viresh.kumar@linaro.org>
13 These bindings are applicable to virtio devices irrespective of the bus they
14 are bound to, like mmio or pci.
16 # We need a select here so we don't match all nodes with 'virtio,mmio'
19 pattern: "^virtio,device[0-9a-f]{1,8}$"
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/Linux-v5.15/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'/>
48 <address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x0'/>
53 <address type='pci' domain='0x0000' bus='0x42' slot='0x02' function='0x5'/>
55 <address type='pci' domain='0x0000' bus='0x00' slot='0x0b' function='0x0'/>
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/Linux-v5.15/drivers/gpu/drm/virtio/
Dvirtgpu_drv.c31 #include <linux/pci.h>
43 static int virtio_gpu_modeset = -1;
50 struct pci_dev *pdev = to_pci_dev(vdev->dev.parent); in virtio_gpu_pci_quirk()
51 const char *pname = dev_name(&pdev->dev); in virtio_gpu_pci_quirk()
52 bool vga = (pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA; in virtio_gpu_pci_quirk()
56 DRM_INFO("pci: %s detected at %s\n", in virtio_gpu_pci_quirk()
57 vga ? "virtio-vga" : "virtio-gpu-pci", in virtio_gpu_pci_quirk()
67 * The following comment covers, why virtio cannot rely on it. in virtio_gpu_pci_quirk()
69 * Unlike the other virtual GPU drivers, virtio abstracts the in virtio_gpu_pci_quirk()
74 * while a "pci:..." one is required. in virtio_gpu_pci_quirk()
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/Linux-v5.15/drivers/vdpa/
DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
7 datapath which complies with virtio specifications with
51 virtio dataplane traffic to hardware.
70 of virtio net datapath such that descriptors put on the ring will
75 tristate "Virtio PCI bridge vDPA driver"
79 This kernel module bridges virtio PCI device to vDPA bus.
/Linux-v5.15/Documentation/virt/
Dne_overview.rst1 .. SPDX-License-Identifier: GPL-2.0
26 1. An enclave abstraction process - a user space process running in the primary
30 There is a NE emulated PCI device exposed to the primary VM. The driver for this
31 new PCI device is included in the NE driver.
33 The ioctl logic is mapped to PCI device commands e.g. the NE_START_ENCLAVE ioctl
34 maps to an enclave start PCI command. The PCI device commands are then
39 2. The enclave itself - a VM running on the same host as the primary VM that
55 using virtio-vsock [5]. The primary VM has virtio-pci vsock emulated device,
56 while the enclave VM has a virtio-mmio vsock emulated device. The vsock device
57 uses eventfd for signaling. The enclave VM sees the usual interfaces - local
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/Linux-v5.15/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-v5.15/include/uapi/linux/
Dvirtio_pci.h2 * Virtio PCI driver
4 * This module allows virtio devices to be used over a virtual PCI device.
46 /* A 32-bit r/o bitmask of the features supported by the host */
49 /* A 32-bit r/w bitmask of features activated by the guest */
52 /* A 32-bit r/w PFN for the currently selected queue */
55 /* A 16-bit r/o queue size for the currently selected queue */
58 /* A 16-bit r/w queue selector */
61 /* A 16-bit r/w queue notifier */
64 /* An 8-bit device status register. */
67 /* An 8-bit r/o interrupt status register. Reading the value will return the
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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-v5.15/arch/um/drivers/
Dvirt-pci.c1 // SPDX-License-Identifier: GPL-2.0
7 #include <linux/pci.h>
8 #include <linux/virtio.h>
13 #include <linux/virtio-uml.h>
23 /* for MSI-X we have a 32-bit payload */
84 return -EINVAL; in um_pci_send_cmd()
86 switch (cmd->op) { in um_pci_send_cmd()
90 /* in PCI, writes are posted, so don't wait */ in um_pci_send_cmd()
128 /* add to internal virtio queue */ in um_pci_send_cmd()
129 ret = virtqueue_add_sgs(dev->cmd_vq, sgs_list, in um_pci_send_cmd()
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DKconfig1 # SPDX-License-Identifier: GPL-2.0
14 The User-Mode Linux environment allows you to create virtual serial
18 See <http://user-mode-linux.sourceforge.net/old/input.html> for more
44 lines to host pseudo-terminals. Access to both traditional
45 pseudo-terminals (/dev/pty*) and pts pseudo-terminals are controlled
55 (/dev/tty*) and the slave side of pseudo-terminals (/dev/ttyp* and
100 traditional pseudo-terminals.
134 While the User-Mode port cannot directly talk to any physical
142 <http://user-mode-linux.sourceforge.net/old/networking.html>.
144 If you'd like to be able to enable networking in the User-Mode
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/Linux-v5.15/tools/
DMakefile1 # SPDX-License-Identifier: GPL-2.0
12 @echo ' acpi - ACPI tools'
13 @echo ' bpf - misc BPF tools'
14 @echo ' cgroup - cgroup 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-v5.15/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-v5.15/drivers/gpu/drm/tiny/
DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
15 depends on DRM && PCI && MMU
28 depends on DRM && PCI && MMU
38 https://www.kraxel.org/blog/2014/10/qemu-using-cirrus-considered-harmful/
41 - stdvga (DRM_BOCHS, qemu -vga std, default in qemu 2.2+)
42 - qxl (DRM_QXL, qemu -vga qxl, works best with spice)
43 - virtio (DRM_VIRTIO_GPU), qemu -vga virtio)
60 DRM driver for simple platform-provided framebuffers.
79 * YX350HV15-T 3.5" 340x350 TFT (Adafruit 3.5")
91 * No-name 2.2" color screen module
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/Linux-v5.15/drivers/iommu/
DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
2 # The IOVA library may also be used by non-IOMMU_API users
6 # The IOASID library may also be used by non-IOMMU_API users
39 sizes at both stage-1 and stage-2, as well as address spaces
40 up to 48-bits in size.
46 Enable self-tests for LPAE page table allocator. This performs
47 a series of page-table consistency checks during boot.
56 Enable support for the ARM Short-descriptor pagetable format.
57 This supports 32-bit virtual and physical addresses mapped using
58 2-level tables with 4KB pages/1MB sections, and contiguous entries
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/Linux-v5.15/drivers/vdpa/virtio_pci/
Dvp_vdpa.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * vDPA bridge driver for modern virtio-pci device
13 #include <linux/pci.h>
15 #include <linux/virtio.h>
53 return &vp_vdpa->mdev; in vdpa_to_mdev()
81 struct virtio_pci_modern_device *mdev = &vp_vdpa->mdev; in vp_vdpa_free_irq()
82 struct pci_dev *pdev = mdev->pci_dev; in vp_vdpa_free_irq()
85 for (i = 0; i < vp_vdpa->queues; i++) { in vp_vdpa_free_irq()
86 if (vp_vdpa->vring[i].irq != VIRTIO_MSI_NO_VECTOR) { in vp_vdpa_free_irq()
88 devm_free_irq(&pdev->dev, vp_vdpa->vring[i].irq, in vp_vdpa_free_irq()
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/Linux-v5.15/sound/
DMakefile1 # SPDX-License-Identifier: GPL-2.0
5 obj-$(CONFIG_SOUND) += soundcore.o
6 obj-$(CONFIG_DMASOUND) += oss/dmasound/
7 obj-$(CONFIG_SND) += core/ i2c/ drivers/ isa/ pci/ ppc/ arm/ sh/ synth/ usb/ \
9 virtio/
10 obj-$(CONFIG_SND_AOA) += aoa/
13 obj-$(CONFIG_AC97_BUS) += ac97_bus.o
14 obj-$(CONFIG_AC97_BUS_NEW) += ac97/
17 obj-y += last.o
20 soundcore-objs := sound_core.o

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