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powerpc: Document xive=off option 

commit 243e25112d ("powerpc/xive: Native exploitation of the XIVE
interrupt controller") added an option to turn off Linux native XIVE
usage via the xive=off kernel command line option.

This documents this option.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Acked-by: Stewart Smith <stewart@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Michael Neuling 2019-05-13 15:39:10 +10:00 committed by Michael Ellerman
parent 8b8dc69514
commit ba45cff610
1 changed files with 9 additions and 0 deletions
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9
Documentation/admin-guide/kernel-parameters.txt
View File

@ -5272,6 +5272,15 @@
Format: Format:
<irq>,<irq_mask>,<io>,<full_duplex>,<do_sound>,<lockup_hack>[,<irq2>[,<irq3>[,<irq4>]]] <irq>,<irq_mask>,<io>,<full_duplex>,<do_sound>,<lockup_hack>[,<irq2>[,<irq3>[,<irq4>]]]
xive= [PPC]
By default on POWER9 and above, the kernel will
natively use the XIVE interrupt controller. This option
allows the fallback firmware mode to be used:
off Fallback to firmware control of XIVE interrupt
controller on both pseries and powernv
platforms. Only useful on POWER9 and above.
xhci-hcd.quirks [USB,KNL] xhci-hcd.quirks [USB,KNL]
A hex value specifying bitmask with supplemental xhci A hex value specifying bitmask with supplemental xhci
host controller quirks. Meaning of each bit can be host controller quirks. Meaning of each bit can be