diff options
Diffstat (limited to 'drivers/firmware/google/Kconfig')
| -rw-r--r-- | drivers/firmware/google/Kconfig | 60 |
1 files changed, 35 insertions, 25 deletions
diff --git a/drivers/firmware/google/Kconfig b/drivers/firmware/google/Kconfig index f16b381a569c..41b78f5cb735 100644 --- a/drivers/firmware/google/Kconfig +++ b/drivers/firmware/google/Kconfig @@ -1,45 +1,47 @@ +# SPDX-License-Identifier: GPL-2.0-only menuconfig GOOGLE_FIRMWARE bool "Google Firmware Drivers" default n help - These firmware drivers are used by Google's servers. They are - only useful if you are working directly on one of their - proprietary servers. If in doubt, say "N". + These firmware drivers are used by Google servers, + Chromebooks and other devices using coreboot firmware. + If in doubt, say "N". if GOOGLE_FIRMWARE config GOOGLE_SMI tristate "SMI interface for Google platforms" - depends on X86 && ACPI && DMI && EFI - select EFI_VARS + 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 EFI event log and reading and writing NVRAM + clearing the event log. If CONFIG_EFI is also enabled this + driver provides an interface for reading and writing NVRAM variables. -config GOOGLE_COREBOOT_TABLE - tristate - depends on GOOGLE_COREBOOT_TABLE_ACPI || GOOGLE_COREBOOT_TABLE_OF - -config GOOGLE_COREBOOT_TABLE_ACPI - tristate "Coreboot Table Access - ACPI" - depends on ACPI - select GOOGLE_COREBOOT_TABLE +config GOOGLE_CBMEM + tristate "CBMEM entries in sysfs" + depends on GOOGLE_COREBOOT_TABLE help - This option enables the coreboot_table module, which provides other - firmware modules to access to the coreboot table. The coreboot table - pointer is accessed through the ACPI "GOOGCB00" object. - If unsure say N. + 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. -config GOOGLE_COREBOOT_TABLE_OF - tristate "Coreboot Table Access - Device Tree" - depends on OF - select GOOGLE_COREBOOT_TABLE + 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 GOOGLE_COREBOOT_TABLE + tristate "Coreboot Table Access" + depends on HAS_IOMEM && (ACPI || OF) help - This option enable the coreboot_table module, which provide other - firmware modules to access coreboot table. The coreboot table pointer - is accessed through the device tree node /firmware/coreboot. + 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 GOOGLE_MEMCONSOLE @@ -55,6 +57,14 @@ config GOOGLE_MEMCONSOLE_X86_LEGACY the EBDA on Google servers. If found, this log is exported to userland in the file /sys/firmware/log. +config GOOGLE_FRAMEBUFFER_COREBOOT + tristate "Coreboot Framebuffer" + depends on FB_SIMPLE || DRM_SIMPLEDRM + depends on GOOGLE_COREBOOT_TABLE + help + This option enables the kernel to search for a framebuffer in + the coreboot table. If found, it is registered with simplefb. + config GOOGLE_MEMCONSOLE_COREBOOT tristate "Firmware Memory Console" depends on GOOGLE_COREBOOT_TABLE |