Change in coreboot[master]: soc/intel/alderlake: Change VBOOT_HASH_BLOCK_SIZE to 4 KiB

[Maulik V Vaghela (Code Review)]

Attention is currently required from: Furquan Shaikh, Maulik V Vaghela, Tim Wawrzynczak, Ronak Kanabar, Patrick Rudolph.
Hello build bot (Jenkins), Furquan Shaikh, Tim Wawrzynczak, Subrata Banik, Ronak Kanabar, Patrick Rudolph,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/57141

to look at the new patch set (#4).

Change subject: soc/intel/alderlake: Change VBOOT_HASH_BLOCK_SIZE to 4 KiB
......................................................................

soc/intel/alderlake: Change VBOOT_HASH_BLOCK_SIZE to 4 KiB

Default VBOOT_HASH_BLOCK_SIZE is 1 KiB and increasing it to 4 KiB
helps in improving overall boot time since it reduces hashing and
body loading time.

Increasing it over 4 KiB doesn't result in significant improvement,
thus keeping the value at 4 KiB as of now.

Timing data:
Note that before Data is with 1 KiB block size.
|------------------------------------------------------|
|        Stage        | Block Size | Before  |  After  |
|finished loading body|     4 KiB  | 205,187 | 189,947 |
|finished loading body|     8 KiB  | 205,187 | 188,708 |
|finished loading body|    16 KiB  | 205,187 | 188,085 |
|finished loading body|    32 KiB  | 205,187 | 187,793 |
|------------------------------------------------------|

BUG=None
BRANCH=None
TEST=Boot time for Brya improves by 20 - 25 msec

Change-Id: I9222761c7d58e4a370d3a41c651b6c169599d792
Signed-off-by: MAULIK V VAGHELA 
---
M src/soc/intel/alderlake/Kconfig
1 file changed, 7 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/41/57141/4