CONFIG_DRM_CIRRUS_QEMU: Cirrus driver for QEMU emulated device

General informations

The Linux kernel configuration item CONFIG_DRM_CIRRUS_QEMU has multiple definitions:

Cirrus driver for QEMU emulated device found in drivers/gpu/drm/tiny/Kconfig

The configuration item CONFIG_DRM_CIRRUS_QEMU:

• prompt: Cirrus driver for QEMU emulated device
• type: tristate
• depends on: CONFIG_DRM && CONFIG_PCI && CONFIG_MMU
• defined in drivers/gpu/drm/tiny/Kconfig
• found in Linux kernels: 5.8–5.19, 6.0–6.8, 6.9-rc+HEAD
• modules built: cirrus, cirrus

Help text

This is a KMS driver for emulated cirrus device in qemu. It is *NOT* intended for real cirrus devices. This requires the modesetting userspace X.org driver.

Cirrus is obsolete, the hardware was designed in the 90ies and can't keep up with todays needs. More background: https://www.kraxel.org/blog/2014/10/qemu-using-cirrus-considered-harmful/

Better alternatives are: - stdvga (DRM_BOCHS, qemu -vga std, default in qemu 2.2+) - qxl (DRM_QXL, qemu -vga qxl, works best with spice) - virtio (DRM_VIRTIO_GPU), qemu -vga virtio)

Cirrus driver for QEMU emulated device found in drivers/gpu/drm/cirrus/Kconfig

The configuration item CONFIG_DRM_CIRRUS_QEMU:

• prompt: Cirrus driver for QEMU emulated device
• type: tristate
• depends on: CONFIG_DRM && CONFIG_PCI && CONFIG_MMU
• defined in drivers/gpu/drm/cirrus/Kconfig
• found in Linux kernels: 3.5–3.19, 4.0–4.20, 5.0–5.7
• modules built: cirrus, cirrus

Help text

This is a KMS driver for emulated cirrus device in qemu. It is *NOT* intended for real cirrus devices. This requires the modesetting userspace X.org driver.

Cirrus is obsolete, the hardware was designed in the 90ies and can't keep up with todays needs. More background: https://www.kraxel.org/blog/2014/10/qemu-using-cirrus-considered-harmful/

Better alternatives are: - stdvga (DRM_BOCHS, qemu -vga std, default in qemu 2.2+) - qxl (DRM_QXL, qemu -vga qxl, works best with spice) - virtio (DRM_VIRTIO_GPU), qemu -vga virtio)

Hardware

PCI

Numeric ID (from LKDDb) and names (from pci.ids) of recognized devices:

• vendor: 1013 ("Cirrus Logic"), device: 00b8 ("GD 5446"), subvendor: 1af4, subdevice: 1100 ("QEMU Virtual Machine")
• vendor: 1013 ("Cirrus Logic"), device: 00b8 ("GD 5446"), subvendor: 1af4, subdevice: 1100 ("QEMU Virtual Machine")
• vendor: 1013 ("Cirrus Logic"), device: 00b8 ("GD 5446"), subvendor: 1af4, subdevice: 1100 ("QEMU Virtual Machine")
• vendor: 1013 ("Cirrus Logic"), device: 00b8 ("GD 5446"), subvendor: 5853, subdevice: 0001
• vendor: 1013 ("Cirrus Logic"), device: 00b8 ("GD 5446"), subvendor: 5853, subdevice: 0001
• vendor: 1013 ("Cirrus Logic"), device: 00b8 ("GD 5446"), subvendor: 5853, subdevice: 0001

LKDDb

Raw data from LKDDb:

• lkddb module cirrus CONFIG_DRM_CIRRUS_QEMU : drivers/gpu/drm/cirrus/Kconfig : "Cirrus driver for QEMU emulated device" # in 3.5–3.19, 4.0–4.20, 5.0–5.7
• lkddb module cirrus CONFIG_DRM_CIRRUS_QEMU : drivers/gpu/drm/tiny/Kconfig : "Cirrus driver for QEMU emulated device" # in 5.8–5.19, 6.0–6.8, 6.9-rc+HEAD
• lkddb pci 1013 00b8 1af4 1100 ...... : CONFIG_DRM_CIRRUS_QEMU : drivers/gpu/drm/cirrus/cirrus.c # in 5.2–5.7
• lkddb pci 1013 00b8 1af4 1100 ...... : CONFIG_DRM_CIRRUS_QEMU : drivers/gpu/drm/cirrus/cirrus_drv.c # in 3.17–3.19, 4.0–4.20, 5.0–5.1
• lkddb pci 1013 00b8 1af4 1100 ...... : CONFIG_DRM_CIRRUS_QEMU : drivers/gpu/drm/tiny/cirrus.c # in 5.8–5.19, 6.0–6.8, 6.9-rc+HEAD
• lkddb pci 1013 00b8 5853 0001 ...... : CONFIG_DRM_CIRRUS_QEMU : drivers/gpu/drm/cirrus/cirrus.c # in 5.2–5.7
• lkddb pci 1013 00b8 5853 0001 ...... : CONFIG_DRM_CIRRUS_QEMU : drivers/gpu/drm/cirrus/cirrus_drv.c # in 3.18–3.19, 4.0–4.20, 5.0–5.1
• lkddb pci 1013 00b8 5853 0001 ...... : CONFIG_DRM_CIRRUS_QEMU : drivers/gpu/drm/tiny/cirrus.c # in 5.8–5.19, 6.0–6.8, 6.9-rc+HEAD

Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)
• The Linux PCI ID Repository.

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