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The Linux kernel configuration item CONFIG_PCI_MSI
:
(none)
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.
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, 6.0–6.11, 6.12-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, 6.0–6.11, 6.12-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, 6.0–6.11, 6.12-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, 6.0–6.11, 6.12-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, 6.0–6.11, 6.12-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, 6.0–6.11, 6.12-rc+HEAD
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Automatically generated (in year 2024). See also LKDDb sources on GitLab