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/include | |
| 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/include')
| -rw-r--r-- | src/drivers/ocp/include/vpd.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/drivers/ocp/include/vpd.h b/src/drivers/ocp/include/vpd.h index 33fece5c4d..60299e38fd 100644 --- a/src/drivers/ocp/include/vpd.h +++ b/src/drivers/ocp/include/vpd.h @@ -77,6 +77,9 @@ enum cxl_memory_mode { /* Socket 1 core disable bitmask */ #define CORE_DIS_BITMSK1 "core_disable_bitmask1" +/* Linux payload kernel log level */ +#define KERNEL_LOG_LEVEL "kernel_log_level" + /* Get VPD key with provided fallback value and min/max ranges */ int get_int_from_vpd_range(const char *const key, const int fallback, const int min, const int max); |