diff options
| author | Johnny Lin <johnny_lin@wiwynn.com> | 2023-05-29 16:23:02 +0800 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2023-06-01 13:12:18 +0000 |
| commit | 2bb5ecbcd62354c0448e05feb0adadb9b96d47d5 (patch) | |
| tree | f04f25590f9390db0c10c8bfec4235557fbd2bfd /src/drivers/ocp/vpd/Kconfig | |
| parent | ae81497cb6c7a7d1c4dde837cb84a196752c57bf (diff) | |
drivers/ocp/vpd: Overwrite Linux payload's kernel command via VPD
Add a new Kconfig LINUXPAYLOAD_CMDLINE_VPD_OVERWRITE that can overwrite
Linux payload's kernel command line from VPD. Currently only overwrite
Linux kernel command line 'loglevel' via VPD key 'kernel_log_level'.
TESTED=On OCP Delta Lake, with kernel_log_level set to 0, warm reboot
time can see about 10 seconds improvement comparing to kernel log level
7.
Change-Id: Idf06c7ab9958c940fc3b23d560bb9dade991a6da
Signed-off-by: Johnny Lin <johnny_lin@wiwynn.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/75510
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: David Hendricks <david.hendricks@gmail.com>
Diffstat (limited to 'src/drivers/ocp/vpd/Kconfig')
| -rw-r--r-- | src/drivers/ocp/vpd/Kconfig | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/drivers/ocp/vpd/Kconfig b/src/drivers/ocp/vpd/Kconfig index ebecbe6962..12ee1855a2 100644 --- a/src/drivers/ocp/vpd/Kconfig +++ b/src/drivers/ocp/vpd/Kconfig @@ -4,3 +4,12 @@ config OCP_VPD depends on VPD help It implements functions that get common VPD variables for OCP projects. + +config LINUXPAYLOAD_CMDLINE_VPD_OVERWRITE + bool + default n + depends on VPD + help + Overwrite Linux payload's kernel command line by using VPD. Currently only + overwrite the value of kernel command line 'loglevel'. The Linux kernel command + line data is detected in the last segment loaded in memory and overwritten. |