[L] Change in coreboot[main]: drivers/efi/uefi_capsules.c: coalesce and store UEFI capsules

[Sergii Dmytruk (Code Review)]

Attention is currently required from: Krystian Hebel, Patrick Rudolph.

Hello Krystian Hebel, Patrick Rudolph, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/83422?usp=email

to look at the new patch set (#3).

The following approvals got outdated and were removed:
Verified+1 by build bot (Jenkins)

Change subject: drivers/efi/uefi_capsules.c: coalesce and store UEFI capsules
......................................................................

drivers/efi/uefi_capsules.c: coalesce and store UEFI capsules

How it approximately works:

(During a normal system run):
1. OS puts a capsule into RAM and calls UpdateCapsule() function of EFI
   runtime
2. If applying the update requires a reboot, EFI implementation creates
   a new CapsuleUpdateData* EFI variable pointing at the beginning of
   capsules description (not data, but description of the data) and does
   a warm reboot leaving capsule data and its description in RAM to be
   picked by firmware on the next boot process

(After DEV_INIT:)
3. Capsules are discovered by checking for CapsuleUpdateData* variables
4. Capsule description in memory and capsule data is validated for
   sanity
5. Capsule data is coalesced into a continuous piece of memory

(On BS_WRITE_TABLES via dasharo_add_capsules_to_bootmem() hook:)
6. Buffer with coalesced capsules is marked as reserved

(On BS_WRITE_TABLES via lb_uefi_capsules() hook:)
7. coreboot table entry is added for each of the discovered capsules

(In UEFI payload:)
8. CapsuleUpdateData* get removed
9. coreboot table is checked for any update capsules which are then
   applied

Change-Id: I162d678ae5c504906084b59c1a8d8c26dadb9433
Signed-off-by: Sergii Dmytruk 
---
M src/commonlib/include/commonlib/coreboot_tables.h
M src/drivers/efi/Kconfig
M src/drivers/efi/Makefile.mk
A src/drivers/efi/capsules.c
A src/drivers/efi/capsules.h
M src/include/boot/coreboot_tables.h
M src/lib/bootmem.c
M src/lib/coreboot_table.c
M src/security/memory/memory_clear.c
9 files changed, 815 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/22/83422/3