powerpc/mm: Enable radix GTSE only if supported.

Browse source

Make GTSE an MMU feature and enable it by default for radix.
However for guest, conditionally enable it if hypervisor supports
it via OV5 vector. Let prom_init ask for radix GTSE only if the
support exists.

Having GTSE as an MMU feature will make it easy to enable radix
without GTSE. Currently radix assumes GTSE is enabled by default.

Signed-off-by: Bharata B Rao <bharata@linux.ibm.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200703053608.12884-2-bharata@linux.ibm.com

...

This commit is contained in:

Bharata B Rao 2020-07-03 11:06:06 +05:30 • committed by Michael Ellerman

parent 793d74a8c7

commit 029ab30b4c

4 changed files with 17 additions and 6 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

4

arch/powerpc/include/asm/mmu.h

View file

1

arch/powerpc/kernel/dt_cpu_ftrs.c

View file

13

arch/powerpc/kernel/prom_init.c

View file

5

arch/powerpc/mm/init_64.c

View file