[PATCH 0/2] Provide PowerVM LPAR Platform KeyStore driver for Self Encrypting Drives

[Nayna Jain]

PowerVM provides an isolated Platform KeyStore(PKS)[1] storage allocation
for each partition(LPAR) with individually managed access controls to store
sensitive information securely. The Linux Kernel can access this storage by
interfacing with the hypervisor using a new set of hypervisor calls. 

This storage can be used for multiple purposes. The current two usecases
are:

1. Guest Secure Boot on PowerVM[2]
2. Self Encrypting Drives(SED) on PowerVM[3]

Initially, the PowerVM LPAR Platform KeyStore(PLPKS) driver was defined
as part of RFC patches which included the user interface design for guest
secure boot[2]. While this interface is still in progress, the same driver
is also required for Self Encrypting Drives(SED) support. For this reason,
the driver is being split from the patchset[1] and is now separately posted
with SED arch-specific code.

This patchset provides driver for PowerVM LPAR Platform KeyStore and also
arch-specific code for SED to make use of it.

The patch series[3] is pre-requisite to build Patch 2/2. The PLPKS
driver can be built of its own.

[1]https://community.ibm.com/community/user/power/blogs/chris-engel1/2020/11/20/powervm-introduces-the-platform-keystore
[2]https://lore.kernel.org/linuxppc-dev/20220622215648.96723-1-nayna@linux.ibm.com/
[3]https://lore.kernel.org/keyrings/20220706023935.875994-1-gjoyce@linux.vnet.ibm.com/T/#mc32b51991bf825ec6f90af010998ec7cd2b9624a

Greg Joyce (1):
  powerpc/pseries: kernel interfaces to PLPKS platform driver

Nayna Jain (1):
  powerpc/pseries: define driver for Platform KeyStore

 arch/powerpc/include/asm/hvcall.h             |   9 +
 arch/powerpc/include/asm/plpks.h              |  90 ++++
 arch/powerpc/platforms/pseries/Kconfig        |  13 +
 arch/powerpc/platforms/pseries/Makefile       |   2 +
 arch/powerpc/platforms/pseries/plpks/Makefile |   8 +
 arch/powerpc/platforms/pseries/plpks/plpks.c  | 509 ++++++++++++++++++
 .../platforms/pseries/plpks/plpks_arch_ops.c  | 163 ++++++
 7 files changed, 794 insertions(+)
 create mode 100644 arch/powerpc/include/asm/plpks.h
 create mode 100644 arch/powerpc/platforms/pseries/plpks/Makefile
 create mode 100644 arch/powerpc/platforms/pseries/plpks/plpks.c
 create mode 100644 arch/powerpc/platforms/pseries/plpks/plpks_arch_ops.c

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2.27.0