CONFIG_PCI_MSI: Message Signaled Interrupts (MSI and MSI-X)

General informations

The Linux kernel configuration item CONFIG_PCI_MSI:

• prompt: Message Signaled Interrupts (MSI and MSI-X)
• type: bool
• depends on: (none)
• defined in drivers/pci/Kconfig
• found in Linux kernels: 2.6.8–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.12, 6.13-rc+HEAD

Help text

This allows device drivers to enable MSI (Message Signaled Interrupts). Message Signaled Interrupts enable a device to generate an interrupt using an inbound Memory Write on its PCI bus instead of asserting a device IRQ pin.

Use of PCI MSI interrupts can be disabled at kernel boot time by using the 'pci=nomsi' option. This disables MSI for the entire system.

If you don't know what to do here, say Y.

Hardware

LKDDb

Raw data from LKDDb:

• lkddb of "" "" "fsl,ipic-msi" : CONFIG_PCI_MSI : arch/powerpc/sysdev/fsl_msi.c # in 2.6.27–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.12, 6.13-rc+HEAD
• lkddb of "" "" "fsl,mpic-msi" : CONFIG_PCI_MSI : arch/powerpc/sysdev/fsl_msi.c # in 2.6.27–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.12, 6.13-rc+HEAD
• lkddb of "" "" "fsl,mpic-msi-v4.3" : CONFIG_PCI_MSI : arch/powerpc/sysdev/fsl_msi.c # in 3.12–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.12, 6.13-rc+HEAD
• lkddb of "" "" "fsl,vmpic-msi" : CONFIG_PCI_MSI : arch/powerpc/sysdev/fsl_msi.c # in 3.3–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.12, 6.13-rc+HEAD
• lkddb of "" "" "fsl,vmpic-msi-v4.3" : CONFIG_PCI_MSI : arch/powerpc/sysdev/fsl_msi.c # in 3.18–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.12, 6.13-rc+HEAD
• lkddb of "" "" "ibm,axon-msic" : CONFIG_PCI_MSI CONFIG_PPC_CELL : arch/powerpc/platforms/cell/axon_msi.c # in 2.6.25–2.6.29
• lkddb platform "fsl-msi" : CONFIG_PCI_MSI : arch/powerpc/sysdev/fsl_msi.c # in 2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.12, 6.13-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)

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