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linux/Documentation/ABI/testing/sysfs-firmware-efi
Narendra K 1c5fecb612 efi: Export Runtime Configuration Interface table to sysfs
System firmware advertises the address of the 'Runtime
Configuration Interface table version 2 (RCI2)' via
an EFI Configuration Table entry. This code retrieves the RCI2
table from the address and exports it to sysfs as a binary
attribute 'rci2' under /sys/firmware/efi/tables directory.
The approach adopted is similar to the attribute 'DMI' under
/sys/firmware/dmi/tables.

RCI2 table contains BIOS HII in XML format and is used to populate
BIOS setup page in Dell EMC OpenManage Server Administrator tool.
The BIOS setup page contains BIOS tokens which can be configured.

Signed-off-by: Narendra K <Narendra.K@dell.com>
Reviewed-by: Mario Limonciello <mario.limonciello@dell.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
2019-08-08 11:10:25 +03:00

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What: /sys/firmware/efi/fw_vendor
Date: December 2013
Contact: Dave Young <dyoung@redhat.com>
Description: It shows the physical address of firmware vendor field in the
EFI system table.
Users: Kexec
What: /sys/firmware/efi/runtime
Date: December 2013
Contact: Dave Young <dyoung@redhat.com>
Description: It shows the physical address of runtime service table entry in
the EFI system table.
Users: Kexec
What: /sys/firmware/efi/config_table
Date: December 2013
Contact: Dave Young <dyoung@redhat.com>
Description: It shows the physical address of config table entry in the EFI
system table.
Users: Kexec
What: /sys/firmware/efi/systab
Date: April 2005
Contact: linux-efi@vger.kernel.org
Description: Displays the physical addresses of all EFI Configuration
Tables found via the EFI System Table. The order in
which the tables are printed forms an ABI and newer
versions are always printed first, i.e. ACPI20 comes
before ACPI.
Users: dmidecode
What: /sys/firmware/efi/tables/rci2
Date: July 2019
Contact: Narendra K <Narendra.K@dell.com>, linux-bugs@dell.com
Description: Displays the content of the Runtime Configuration Interface
Table version 2 on Dell EMC PowerEdge systems in binary format
Users: It is used by Dell EMC OpenManage Server Administrator tool to
populate BIOS setup page.