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Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/amd/picasso/Kconfig | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/soc/amd/picasso/Kconfig b/src/soc/amd/picasso/Kconfig index bae2d2868a..5ae0a2a58f 100644 --- a/src/soc/amd/picasso/Kconfig +++ b/src/soc/amd/picasso/Kconfig @@ -535,6 +535,22 @@ config VBOOT_STARTS_BEFORE_BOOTBLOCK Runs verstage on the PSP. Only available on certain Chrome OS branded parts from AMD. +config VBOOT_HASH_BLOCK_SIZE + hex + default 0x9000 + depends on VBOOT_STARTS_BEFORE_BOOTBLOCK + help + Because the bulk of the time in psp_verstage to hash the RO cbfs is + spent in the overhead of doing svc calls, increasing the hash block + size significantly cuts the verstage hashing time as seen below. + + 4k takes 180ms + 16k takes 44ms + 32k takes 33.7ms + 36k takes 32.5ms + There's actually still room for an even bigger stack, but we've + reached a point of diminishing returns. + config CMOS_RECOVERY_BYTE hex default 0x51 |