powerpc/pseries/cmm: Simulation mode

Browse source

Let's allow to test the implementation without needing HW support.
When "simulate=1" is specified when loading the module, we bypass all
HW checks and HW calls. The sysfs file "simulate_loan_target_kb" can
be used to simulate HW requests.

The simualtion mode can be activated using:
  modprobe cmm debug=1 simulate=1

And the requested loan target can be changed using:
  echo X > /sys/devices/system/cmm/cmm0/simulate_loan_target_kb

Signed-off-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20191031142933.10779-11-david@redhat.com

...

This commit is contained in:

David Hildenbrand 2019-10-31 15:29:31 +01:00 • committed by Michael Ellerman

parent e8decafefb

commit b1713975c3

1 changed files with 30 additions and 8 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

38

arch/powerpc/platforms/pseries/cmm.c

View file