Leopard: slow boot times

[osresearch]

LinuxBoot works on Leopard, but there are some issues with very slow boot times.

Some of the required DXE/SMM modules are very slow to startup:

• PchBiosWriteProtect.efi takes 2.4 seconds
• IioInit.efi takes 3.6 seconds
• PpmInitialize.efi, 3.4 seconds

Locking SMM is also slow over 6 seconds for the first protocol and 14 seconds for the second:

0.010 [2018-03-22 18:47:47.746] signal smm ready to lock
0.006 [2018-03-22 18:47:47.803] handle_count=00000600
5.973 [2018-03-22 18:47:53.776] InstallProtocolInterface: EF117840-B255-11E2-8EE4-A60DC653765B 770ED018
0.014 [2018-03-22 18:47:53.790] InstallProtocolInterface: EF117840-B255-11E2-8EE4-A60DC653765B 760B9018
14.429 [2018-03-22 18:48:08.219] InstallProtocolInterface: 86C77A67-0B97-4633-A187-49104D0685C7 770E3EB0

Whatever is happening during exit boot services is also taking up to thirty seconds:

0.003 [2018-03-22 18:48:09.079] ExitBootServices
28.304 [2018-03-22 18:48:37.383] efi_main done 057D