diff options
| -rw-r--r-- | src/soc/intel/alderlake/cpu.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/soc/intel/alderlake/cpu.c b/src/soc/intel/alderlake/cpu.c index 5b1a690b9e..92b253216a 100644 --- a/src/soc/intel/alderlake/cpu.c +++ b/src/soc/intel/alderlake/cpu.c @@ -11,6 +11,7 @@ #include <device/pci_ids.h> #include <cpu/x86/mp.h> #include <cpu/x86/msr.h> +#include <cpu/intel/microcode.h> #include <cpu/intel/smm_reloc.h> #include <cpu/intel/turbo.h> #include <cpu/intel/common/common.h> @@ -333,3 +334,24 @@ uint8_t get_supported_lpm_mask(void) return 0; } } + +int soc_skip_ucode_update(u32 current_patch_id, u32 new_patch_id) +{ + if (!CONFIG(CHROMEOS)) + return 0; + /* + * Locked RO Descriptor Implications: + * + * - A locked descriptor signals the RO binary is fixed; the FIT will load the + * RO's microcode during system reset. + * - Attempts to load newer microcode from the RW CBFS will cause a boot-time + * delay (~60ms, core-dependent), as the microcode must be reloaded on BSP+APs. + * - The kernel can load microcode updates without impacting AP FW boot time. + * - Skipping RW CBFS microcode loading is low-risk when the RO is locked, + * prioritizing fast boot times. + */ + if (CONFIG(LOCK_MANAGEMENT_ENGINE) && current_patch_id) + return 1; + + return 0; +} |