From 33b9ca1e53b45f7cacdba9d4fba5cb1387b26827 Mon Sep 17 00:00:00 2001 From: Mario Limonciello Date: Wed, 1 Nov 2017 14:25:30 -0500 Subject: platform/x86: dell-smbios: Add a sysfs interface for SMBIOS tokens Currently userspace tools can access system tokens via the dcdbas kernel module and a SMI call that will cause the platform to execute SMM code. With a goal in mind of deprecating the dcdbas kernel module a different method for accessing these tokens from userspace needs to be created. This is intentionally marked to only be readable as a process with CAP_SYS_ADMIN as it can contain sensitive information about the platform's configuration. While adding this interface I found that some tokens are duplicated. These need to be ignored from sysfs to avoid duplicate files. MAINTAINERS was missing for this driver. Add myself and Pali to maintainers list for it. Signed-off-by: Mario Limonciello Reviewed-by: Edward O'Callaghan Signed-off-by: Darren Hart (VMware) --- .../ABI/testing/sysfs-platform-dell-smbios | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-platform-dell-smbios (limited to 'Documentation/ABI') diff --git a/Documentation/ABI/testing/sysfs-platform-dell-smbios b/Documentation/ABI/testing/sysfs-platform-dell-smbios new file mode 100644 index 000000000000..205d3b6361e0 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-platform-dell-smbios @@ -0,0 +1,21 @@ +What: /sys/devices/platform//tokens/* +Date: November 2017 +KernelVersion: 4.15 +Contact: "Mario Limonciello" +Description: + A read-only description of Dell platform tokens + available on the machine. + + Each token attribute is available as a pair of + sysfs attributes readable by a process with + CAP_SYS_ADMIN. + + For example the token ID "5" would be available + as the following attributes: + + 0005_location + 0005_value + + Tokens will vary from machine to machine, and + only tokens available on that machine will be + displayed. -- cgit v1.2.1