From 2bb5ecbcd62354c0448e05feb0adadb9b96d47d5 Mon Sep 17 00:00:00 2001 From: Johnny Lin Date: Mon, 29 May 2023 16:23:02 +0800 Subject: 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 Reviewed-on: https://review.coreboot.org/c/coreboot/+/75510 Tested-by: build bot (Jenkins) Reviewed-by: David Hendricks --- src/drivers/ocp/include/vpd.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'src/drivers/ocp/include') 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); -- cgit v1.2.3