linux-sg2042/drivers/firmware/google
Arthur Heymans e4924ee263 firmware: google: Probe for a GSMI handler in firmware
Currently this driver is loaded if the DMI string matches coreboot
and has a proper smi_command in the ACPI FADT table, but a GSMI handler in
SMM is an optional feature in coreboot.

So probe for a SMM GSMI handler before initializing the driver.
If the smihandler leaves the calling argument in %eax in the SMM save state
untouched that generally means the is no handler for GSMI.

Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Link: https://lore.kernel.org/r/20191118101934.22526-4-patrick.rudolph@9elements.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14 21:46:48 +01:00
..
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile firmware: coreboot: Collapse platform drivers into bus core 2018-09-14 15:37:23 +02:00
coreboot_table.c firmware: google: Release devices before unregistering the bus 2020-01-14 21:46:48 +01:00
coreboot_table.h Merge 5.2-rc4 into char-misc-next 2019-06-09 09:11:21 +02:00
framebuffer-coreboot.c Merge 5.2-rc4 into char-misc-next 2019-06-09 09:11:21 +02:00
gsmi.c firmware: google: Probe for a GSMI handler in firmware 2020-01-14 21:46:48 +01:00
memconsole-coreboot.c Merge 5.2-rc4 into char-misc-next 2019-06-09 09:11:21 +02:00
memconsole-x86-legacy.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 287 2019-06-05 17:36:37 +02:00
memconsole.c Merge 5.2-rc4 into char-misc-next 2019-06-09 09:11:21 +02:00
memconsole.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 287 2019-06-05 17:36:37 +02:00
vpd.c firmware: google: check if size is valid when decoding VPD data 2019-09-04 13:31:28 +02:00
vpd_decode.c firmware: google: increment VPD key_len properly 2019-10-11 08:41:34 +02:00
vpd_decode.h firmware: google: check if size is valid when decoding VPD data 2019-09-04 13:31:28 +02:00