[PATCH 0/8] Extend PKWM to support user-created wrapping keys

[Srish Srinivasan <ssrish@linux.ibm.com>]

The PKWM trusted source currently uses a single default wrapping key per
LPAR. This key is created during trusted source initialization, and all
trusted keys backed by PKWM are sealed and unsealed using it.

Recent versions of PKWM allow users to create and manage their own wrapping
keys through a set of lifecycle operations. This patch series brings these
PKWM capabilities into the kernel, allowing users to create, manage, and
select wrapping keys for sealing and unsealing their trusted keys, rather
than requiring all trusted keys to use the default wrapping key.

In addition to implementing user-created wrapping key support, this series
includes five prerequisite cleanup patches for the PLPKS and PKWM code.
These patches improve error handling and type consistency, rename a macro
for clarity, prevent unsupported capabilities from being exposed through
the sysfs, and make minor documentation and MAINTAINERS updates.

Srish Srinivasan (8):
  pseries/plpks: update PKS documentation and maintainer entry
  pseries/plpks: fix error handling in plpks_read_var()
  pseries/plpks: improve type consistency and parameter validation
  pseries/plpks: rename the default wrapping key macro
  pseries/plpks: hide wrapping_features when unsupported
  pseries/plpks: add HCALLs for PKWM wrapping key life cycle management
  keys/trusted_keys: enable PKWM wrapping key selection by label
  pseries/plpks/wrapkey: expose PKWM wrapping key management to
    userspace via sysfs

 .../ABI/testing/sysfs-firmware-plpks          | 106 ++++
 Documentation/arch/powerpc/papr_hcalls.rst    |  49 +-
 .../security/keys/trusted-encrypted.rst       |   4 +-
 MAINTAINERS                                   |   2 +-
 arch/powerpc/include/asm/hvcall.h             |   5 +-
 arch/powerpc/include/asm/plpks.h              |  40 +-
 arch/powerpc/platforms/pseries/Kconfig        |  13 +
 arch/powerpc/platforms/pseries/Makefile       |   1 +
 arch/powerpc/platforms/pseries/plpks-sysfs.c  |  31 +-
 .../platforms/pseries/plpks-wrapkey-sysfs.c   | 407 +++++++++++++
 arch/powerpc/platforms/pseries/plpks.c        | 557 ++++++++++++++++--
 include/keys/trusted_pkwm.h                   |   3 +
 security/keys/trusted-keys/trusted_pkwm.c     |  40 +-
 13 files changed, 1188 insertions(+), 70 deletions(-)
 create mode 100644 arch/powerpc/platforms/pseries/plpks-wrapkey-sysfs.c

-- 
2.52.0