powerpc/64s: Disallow PROT_SAO in LPARs by default

Since migration of guests using SAO to ISA 3.1 hosts may cause issues,
disable PROT_SAO in LPARs by default and introduce a new Kconfig option
PPC_PROT_SAO_LPAR to allow users to enable it if desired.

Signed-off-by: Shawn Anastasio <shawn@anastas.io>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200821185558.35561-3-shawn@anastas.io
This commit is contained in:
Shawn Anastasio 2020-08-21 13:55:57 -05:00 • committed by Michael Ellerman
commit 9b725a90a8
2 changed files with 19 additions and 2 deletions