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s390/pci: add parameter to disable usage of MIO instructions

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Allow users to disable usage of MIO instructions by specifying pci=nomio
at the kernel command line.

Signed-off-by: Sebastian Ott <sebott@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott
2019-04-18 21:39:06 +02:00
committed by Martin Schwidefsky
parent 71ba41c9b1
commit 5627130380
2 changed files with 7 additions and 1 deletions
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Documentation/admin-guide/kernel-parameters.txt
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@@ -3395,6 +3395,7 @@
this removes isolation between devices and
may put more devices in an IOMMU group.
force_floating [S390] Force usage of floating interrupts.
nomio [S390] Do not use MIO instructions.
pcie_aspm= [PCIE] Forcibly enable or disable PCIe Active State Power
Management.