[PATCH v2 0/3] firmware: Add boot information to sysfs
joel at jms.id.au
Thu Feb 3 22:53:41 AEDT 2022
v2 reworks the series to put the sysfs properties in the core, and
optionally show them with the is_visible() callback.
This is the second iteration of this idea. The first used socinfo
custom attribute groups, but Arnd suggested we make this something
standardised under /sys/firmware instead:
Some ARM systems have a firmware that provides a hardware root of
trust. It's useful for the system to know how this root of trust has
been configured, so provide a standardised interface that expose this
information to userspace.
This is implemented as a sysfs attribute group registration in the
driver core, with platforms populating values obtained from firmware at
kernel boot time.
Patch 2 provides a user of the properties on an ARM system.
Patch 3 is new in v2 and is an example of populating bootinfo with the
EFI secure boot status.
Joel Stanley (3):
firmware: Add boot information to sysfs
ARM: aspeed: Add secure boot controller support
x86/setup: Populate bootinfo with secure boot status
.../ABI/testing/sysfs-firmware-bootinfo | 43 +++++++++
arch/x86/kernel/setup.c | 6 ++
drivers/base/firmware.c | 90 +++++++++++++++++++
drivers/soc/aspeed/aspeed-socinfo.c | 46 +++++++++-
include/linux/firmware_bootinfo.h | 22 +++++
5 files changed, 206 insertions(+), 1 deletion(-)
create mode 100644 Documentation/ABI/testing/sysfs-firmware-bootinfo
create mode 100644 include/linux/firmware_bootinfo.h
More information about the Linux-aspeed