diff options
| author | Raul E Rangel <rrangel@chromium.org> | 2021-11-19 11:38:35 -0700 |
|---|---|---|
| committer | Raul Rangel <rrangel@chromium.org> | 2021-11-29 20:39:32 +0000 |
| commit | 4b5a490b6f3faffe1880c731b50d1a4adabfb622 (patch) | |
| tree | 09be3f175073c57db3fb02d174e6d20950979e21 /src/soc/amd | |
| parent | 6b446b991b00c44902b70d86c75b23a8f93d510b (diff) | |
src/cpu,soc/amd/common/block/cpu: Add preload_microcode
This will enable preloading the microcode. By preloading the
file, into cbfs_cache we reduce boot time.
BUG=b:179699789
TEST=Boot guybrush with CL chain and see microcode preloading and a
reduction of 1 ms.
| 112 - started reading uCode | 1.041 | 1.204 Δ( 0.16, 0.01%) |
| 113 - finished reading uCode | 1.365 | 0.011 Δ( -1.35, -0.10%) |
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: If0c634c692c97769e71acd1175fc464dc592c356
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58963
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Diffstat (limited to 'src/soc/amd')
| -rw-r--r-- | src/soc/amd/common/block/cpu/update_microcode.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/src/soc/amd/common/block/cpu/update_microcode.c b/src/soc/amd/common/block/cpu/update_microcode.c index e6a57f5c99..33b244d192 100644 --- a/src/soc/amd/common/block/cpu/update_microcode.c +++ b/src/soc/amd/common/block/cpu/update_microcode.c @@ -10,6 +10,8 @@ #include <cbfs.h> #include <timestamp.h> +#define CPU_MICROCODE_BLOB_NAME "cpu_microcode_blob.bin" + _Static_assert(CONFIG_SOC_AMD_COMMON_BLOCK_UCODE_SIZE > 0, "SOC_AMD_COMMON_BLOCK_UCODE_SIZE is not set"); @@ -97,9 +99,10 @@ void amd_update_microcode_from_cbfs(void) /* Cache the buffer so each CPU doesn't need to read the uCode from flash */ if (!cache_valid) { timestamp_add_now(TS_READ_UCODE_START); - ucode_list = cbfs_map("cpu_microcode_blob.bin", &ucode_len); + ucode_list = cbfs_map(CPU_MICROCODE_BLOB_NAME, &ucode_len); if (!ucode_list) { - printk(BIOS_WARNING, "cpu_microcode_blob.bin not found. Skipping updates.\n"); + printk(BIOS_WARNING, + CPU_MICROCODE_BLOB_NAME " not found. Skipping updates.\n"); return; } @@ -120,3 +123,12 @@ void amd_update_microcode_from_cbfs(void) apply_microcode_patch(&ucode_cache); } + +void preload_microcode(void) +{ + if (!CONFIG(CBFS_PRELOAD)) + return; + + printk(BIOS_DEBUG, "Preloading microcode %s\n", CPU_MICROCODE_BLOB_NAME); + cbfs_preload(CPU_MICROCODE_BLOB_NAME); +} |