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# SPDX-License-Identifier: GPL-2.0-only
menuconfig COREBOOT_FIRMWARE
bool "coreboot firmware drivers"
default GOOGLE_FIRMWARE
default n
help
These firmware drivers are used by devices running coreboot
firmware, including Chromebooks and some Google servers.
They include shared support for coreboot table entries and
drivers for CBMEM, framebuffer, firmware console and VPD records.
If in doubt, say "N".
if COREBOOT_FIRMWARE
config GOOGLE_SMI
tristate "SMI interface for Google platforms"
depends on X86 && ACPI && DMI
help
Say Y here if you want to enable SMI callbacks for Google
platforms. This provides an interface for writing to and
clearing the event log. If CONFIG_EFI is also enabled this
driver provides an interface for reading and writing NVRAM
variables.
config COREBOOT_CBMEM
tristate "CBMEM entries in sysfs"
depends on COREBOOT_TABLE
default GOOGLE_CBMEM
help
CBMEM is a downwards-growing memory region created by the
Coreboot BIOS containing tagged data structures from the
BIOS. These data structures expose things like the verified
boot firmware variables, flash layout, firmware event log,
and more.
This option enables the cbmem module, which causes the
kernel to search for Coreboot CBMEM entries, and expose the
memory for each entry in sysfs under
/sys/bus/coreboot/devices/cbmem-<id>.
config COREBOOT_TABLE
tristate "Coreboot Table Access"
depends on HAS_IOMEM && (ACPI || OF)
default GOOGLE_COREBOOT_TABLE
help
This option enables the coreboot_table module, which provides other
firmware modules access to the coreboot table. The coreboot table
pointer is accessed through the ACPI "GOOGCB00" object or the
device tree node /firmware/coreboot.
If unsure say N.
config COREBOOT_CFR
tristate "coreboot CFR firmware attributes"
depends on EFI
depends on COREBOOT_TABLE
depends on HAS_IOPORT
select CRC32
select FW_ATTR_CLASS
help
This driver parses the coreboot CFR table and exposes runtime EFI
variable-backed options through the firmware-attributes sysfs
interface.
If you have a system running coreboot with CFR runtime
configuration support, say Y or M here.
config COREBOOT_MEMCONSOLE_COMMON
tristate
depends on GOOGLE_MEMCONSOLE_X86_LEGACY || COREBOOT_MEMCONSOLE
default GOOGLE_MEMCONSOLE
config GOOGLE_MEMCONSOLE_X86_LEGACY
tristate "Firmware Memory Console - X86 Legacy support"
depends on X86 && ACPI && DMI
select COREBOOT_MEMCONSOLE_COMMON
help
This option enables the kernel to search for a firmware log in
the EBDA on Google servers. If found, this log is exported to
userland in the file /sys/firmware/log.
This driver is limited to x86 systems that expose the legacy
Google EBDA console format.
config COREBOOT_FRAMEBUFFER
tristate "Coreboot Framebuffer"
depends on COREBOOT_TABLE
default GOOGLE_FRAMEBUFFER_COREBOOT
help
This option enables the kernel to search for a framebuffer in
the coreboot table. If found, it is registered with a platform
device of type coreboot-framebuffer. Using the old device of
type simple-framebuffer is deprecated.
config COREBOOT_MEMCONSOLE
tristate "Firmware Memory Console"
depends on COREBOOT_TABLE
select COREBOOT_MEMCONSOLE_COMMON
default GOOGLE_MEMCONSOLE_COREBOOT
help
This option enables the kernel to search for a firmware log in
the coreboot table. If found, this log is exported to userland
in the file /sys/firmware/log.
This is the coreboot-table backed variant of the firmware memory
console driver.
config GOOGLE_VPD
tristate "Vital Product Data"
depends on COREBOOT_TABLE
help
This option enables the kernel to expose the content of Google VPD
under /sys/firmware/vpd.
VPD records carry firmware-provided key/value data used by
Google devices.
endif # COREBOOT_FIRMWARE
config GOOGLE_FIRMWARE
bool
transitional
config GOOGLE_CBMEM
tristate
transitional
config GOOGLE_COREBOOT_TABLE
tristate
transitional
config GOOGLE_MEMCONSOLE
tristate
transitional
config GOOGLE_FRAMEBUFFER_COREBOOT
tristate
transitional
config GOOGLE_MEMCONSOLE_COREBOOT
tristate
transitional
|
