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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: ( CONFIG_PCI ) && ( CONFIG_ARCH_SUPPORTS_MSI )
• defined in drivers/pci/Kconfig
• found in Linux kernels: 2.6.8–2.6.39, 3.0–3.9, 3.10-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
• lkddb of "" "" "fsl,mpic-msi" : CONFIG_PCI_MSI : arch/powerpc/sysdev/fsl_msi.c
• lkddb of "" "" "fsl,vmpic-msi" : CONFIG_PCI_MSI : arch/powerpc/sysdev/fsl_msi.c
• lkddb of "" "" "ibm,axon-msic" : CONFIG_PCI_MSI CONFIG_PPC_CELL : arch/powerpc/platforms/cell/axon_msi.c
• lkddb platform "fsl-msi" : CONFIG_PCI_MSI : arch/powerpc/sysdev/fsl_msi.c

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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