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| author | Angel Pons <th3fanbus@gmail.com> | 2021-09-03 16:51:40 +0200 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2021-11-04 10:25:09 +0000 |
| commit | 437da71d0a9c7f397860efd02ddb03de9fd5b874 (patch) | |
| tree | 8664294850b1b7985440819f00359c00220c59fc /src/Kconfig | |
| parent | bb03e763de0a69265976463b07dbe8226608c6ff (diff) | |
SMBIOS/SCONFIG: Allow devtree-defined Type 41 entries
Introduce the `smbios_dev_info` devicetree keyword to specify the
instance ID and RefDes (Reference Designation) of onboard devices.
Example syntax:
device pci 1c.0 on # PCIe Port #1
device pci 00.0 on
smbios_dev_info 6
end
end
device pci 1c.1 on # PCIe Port #2
device pci 00.0 on
smbios_dev_info 42 "PCIe-PCI Time Machine"
end
end
The `SMBIOS_TYPE41_PROVIDED_BY_DEVTREE` Kconfig option enables using
this syntax to control the generated Type 41 entries. When this option
is enabled, Type 41 entries are only autogenerated for devices with a
defined instance ID. This avoids having to keep track of which instance
IDs have been used for every device class.
Using `smbios_dev_info` when `SMBIOS_TYPE41_PROVIDED_BY_DEVTREE` is not
enabled will result in a build-time error, as the syntax is meaningless
in this case. This is done with preprocessor guards around the Type 41
members in `struct device` and the code which uses the guarded members.
Although the preprocessor usage isn't particularly elegant, adjusting
the devicetree syntax and/or grammar depending on a Kconfig option is
probably even worse.
Change-Id: Iecca9ada6ee1000674cb5dd7afd5c309d8e1a64b
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57370
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Diffstat (limited to 'src/Kconfig')
| -rw-r--r-- | src/Kconfig | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/Kconfig b/src/Kconfig index be269b6195..e4ddf0cc70 100644 --- a/src/Kconfig +++ b/src/Kconfig @@ -785,6 +785,21 @@ config GENERATE_SMBIOS_TABLES If unsure, say Y. +config SMBIOS_TYPE41_PROVIDED_BY_DEVTREE + bool + depends on ARCH_X86 + help + If enabled, only generate SMBIOS Type 41 entries for PCI devices in + the devicetree for which Type 41 information is provided, e.g. with + the `smbios_dev_info` devicetree syntax. This is useful to manually + assign specific instance IDs to onboard devices irrespective of the + device traversal order. It is assumed that instance IDs for devices + of the same class are unique. + When disabled, coreboot autogenerates SMBIOS Type 41 entries for all + appropriate PCI devices in the devicetree. Instance IDs are assigned + successive numbers from a monotonically increasing counter, with one + counter for each device class. + config SMBIOS_PROVIDED_BY_MOBO bool default n |