Re: [PATCH v2 0/3] Reintroduce PROT_SAO
On Fri, 21 Aug 2020 13:55:55 -0500, Shawn Anastasio wrote:
> Changes in v2:
> - Update prot_sao selftest to skip ISA 3.1
>
> This set re-introduces the PROT_SAO prot flag removed in
> Commit 5c9fa16e8abd ("powerpc/64s: Remove PROT_SAO support").
>
> To address concerns regarding live migration of guests using SAO
> to P10 hosts without SAO support, the flag is disabled by default
> in LPARs. A new config option, PPC_PROT_SAO_LPAR was added to
> allow users to explicitly enable it if they will not be running
> in an environment where this is a conern.
>
> [...]
Applied to powerpc/fixes.
[1/3] Revert "powerpc/64s: Remove PROT_SAO support"
https://git.kernel.org/powerpc/c/12564485ed8caac3c18572793ec01330792c7191
[2/3] powerpc/64s: Disallow PROT_SAO in LPARs by default
https://git.kernel.org/powerpc/c/9b725a90a8f127802e19466d4e336e701bcea0d2
[3/3] selftests/powerpc: Update PROT_SAO test to skip ISA 3.1
https://git.kernel.org/powerpc/c/24ded46f53f954b9cf246c5d4e3770c7a8aa84ce
cheers
[PATCH v2 0/3] Reintroduce PROT_SAO
Changes in v2:
- Update prot_sao selftest to skip ISA 3.1
This set re-introduces the PROT_SAO prot flag removed in
Commit 5c9fa16e8abd ("powerpc/64s: Remove PROT_SAO support").
To address concerns regarding live migration of guests using SAO
to P10 hosts without SAO support, the flag is disabled by default
in LPARs. A new config option, PPC_PROT_SAO_LPAR was added to
allow users to explicitly enable it if they will not be running
in an environment where this is a conern.
Shawn Anastasio (3):
Revert "powerpc/64s: Remove PROT_SAO support"
powerpc/64s: Disallow PROT_SAO in LPARs by default
selftests/powerpc: Update PROT_SAO test to skip ISA 3.1
arch/powerpc/Kconfig | 12 ++
arch/powerpc/include/asm/book3s/64/pgtable.h | 8 ++--
arch/powerpc/include/asm/cputable.h | 10 ++---
arch/powerpc/include/asm/mman.h | 31 +++--
arch/powerpc/include/asm/nohash/64/pgtable.h | 2 +
arch/powerpc/include/uapi/asm/mman.h | 2 +-
arch/powerpc/kernel/dt_cpu_ftrs.c | 2 +-
arch/powerpc/mm/book3s64/hash_utils.c | 2 +
include/linux/mm.h| 2 +
include/trace/events/mmflags.h| 2 +
mm/ksm.c | 4 ++
tools/testing/selftests/powerpc/mm/.gitignore | 1 +
tools/testing/selftests/powerpc/mm/Makefile | 4 +-
tools/testing/selftests/powerpc/mm/prot_sao.c | 43 +++
14 files changed, 108 insertions(+), 17 deletions(-)
create mode 100644 tools/testing/selftests/powerpc/mm/prot_sao.c
--
2.28.0
