Russell Currey 5906357807 powerpc/pseries: Avoid hcall in plpks_is_available() on non-pseries
commit f82cdc37c4bd4ba905bf99ade9782a639b5c12e9 upstream.

plpks_is_available() can be called on any platform via kexec but calls
_plpks_get_config() which makes a hcall, which will only work on pseries.
Fix this by returning early in plpks_is_available() if hcalls aren't
possible.

Fixes: 119da30d037d ("powerpc/pseries: Expose PLPKS config values, support additional fields")
Reported-by: Murphy Zhou <jencce.kernel@gmail.com>
Signed-off-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230222021708.146257-1-ruscur@russell.cc
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-08-03 08:49:53 +02:00
..
2024-07-05 09:31:57 +02:00