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 dependency patch from patch series[3] is moved to this patchset. This
patchset now builds completely 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-na...@linux.ibm.com/
[3]https://lore.kernel.org/keyrings/20220718210156.1535955-1-gjo...@linux.vnet.ibm.com/T/#m8e7b2cbbd26ee1de711bd70967fd0124c85c479f
Changelog:
v2:
* Include feedback from Gregory Joyce, Eric Richter and Murilo Opsfelder Araújo.
* Include suggestions from Michael Ellerman.
* Moved a dependency from generic SED code to this patchset. This patchset now
builds of its own.
Greg Joyce (2):
lib: define generic accessor functions for arch specific keystore
powerpc/pseries: Override lib/arch_vars.c with PowerPC architecture
specific version
Nayna Jain (1):
powerpc/pseries: define driver for Platform KeyStore
arch/powerpc/include/asm/hvcall.h | 11 +
arch/powerpc/platforms/pseries/Kconfig| 13 +
arch/powerpc/platforms/pseries/Makefile | 2 +
arch/powerpc/platforms/pseries/plpks.c| 460 ++
arch/powerpc/platforms/pseries/plpks.h| 71 +++
.../platforms/pseries/plpks_arch_ops.c| 166 +++
include/linux/arch_vars.h | 23 +
lib/Makefile | 2 +-
lib/arch_vars.c | 25 +
9 files changed, 772 insertions(+), 1 deletion(-)
create mode 100644 arch/powerpc/platforms/pseries/plpks.c
create mode 100644 arch/powerpc/platforms/pseries/plpks.h
create mode 100644 arch/powerpc/platforms/pseries/plpks_arch_ops.c
create mode 100644 include/linux/arch_vars.h
create mode 100644 lib/arch_vars.c
--
2.27.0
