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| author | Nayna Jain <nayna@linux.ibm.com> | 2019-11-10 21:10:34 -0600 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-11-13 00:33:22 +1100 |
| commit | bd5d9c743d38f67d64ea1b512a461f6b5a5f6bec (patch) | |
| tree | ea45af52267b64c35dbc5d7eaf79fa108b1c82bc /arch/powerpc/Kconfig | |
| parent | 9155e2341aa8b5df057dc1c77633b33d1a4f17d2 (diff) | |
| download | lwn-bd5d9c743d38f67d64ea1b512a461f6b5a5f6bec.tar.gz lwn-bd5d9c743d38f67d64ea1b512a461f6b5a5f6bec.zip | |
powerpc: expose secure variables to userspace via sysfs
PowerNV secure variables, which store the keys used for OS kernel
verification, are managed by the firmware. These secure variables need to
be accessed by the userspace for addition/deletion of the certificates.
This patch adds the sysfs interface to expose secure variables for PowerNV
secureboot. The users shall use this interface for manipulating
the keys stored in the secure variables.
Signed-off-by: Nayna Jain <nayna@linux.ibm.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Eric Richter <erichte@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1573441836-3632-3-git-send-email-nayna@linux.ibm.com
Diffstat (limited to 'arch/powerpc/Kconfig')
| -rw-r--r-- | arch/powerpc/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index c795039bdc73..cabc091f3fe1 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -945,6 +945,17 @@ config PPC_SECURE_BOOT to enable OS secure boot on systems that have firmware support for it. If in doubt say N. +config PPC_SECVAR_SYSFS + bool "Enable sysfs interface for POWER secure variables" + default y + depends on PPC_SECURE_BOOT + depends on SYSFS + help + POWER secure variables are managed and controlled by firmware. + These variables are exposed to userspace via sysfs to enable + read/write operations on these variables. Say Y if you have + secure boot enabled and want to expose variables to userspace. + endmenu config ISA_DMA_API |