GNUBoot
/
coreboot-kgpe-d16
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Kconfig: Allow x86 to compress pre-ram stages if not run XIP 

On the intel/glkrvp
compressed:
- romstage: 29659
- verstage: 31303
non compressed:
- romstage: 46244
- verstage: 47012

On qemu (with some additional patch to not run XIP)
compressed:
- romstage: 11203
non compressed:
- romstage: 13924

Even with a small romstage the size improvements are substantial,
which should result in a speedup when loading the stage. On the
up/squared loading romstage is sped up by 9ms.

TESTED: successfully boot the up/squared & google/vilboz.

Change-Id: Iac24d243c4bd4cb8c1db14a8e9fc43f508c2cd5d
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36613
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Sean Rhodes <sean@starlabs.systems>
This commit is contained in:
Arthur Heymans 2019-11-04 18:57:06 +01:00 committed by Paul Fagerburg
parent b6cce33b18
commit 6317aff5b3
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
src/Kconfig
View File

@ -173,14 +173,14 @@ config COMPRESS_RAMSTAGE
config COMPRESS_PRERAM_STAGES config COMPRESS_PRERAM_STAGES
bool "Compress romstage and verstage with LZ4" bool "Compress romstage and verstage with LZ4"
depends on !ARCH_X86 && (HAVE_ROMSTAGE || HAVE_VERSTAGE) depends on (HAVE_ROMSTAGE || HAVE_VERSTAGE) && NO_XIP_EARLY_STAGES
# Default value set at the end of the file # Default value set at the end of the file
help help
Compress romstage and (if it exists) verstage with LZ4 to save flash Compress romstage and (if it exists) verstage with LZ4 to save flash
space and speed up boot, since the time for reading the image from SPI space and speed up boot, since the time for reading the image from SPI
(and in the vboot case verifying it) is usually much greater than the (and in the vboot case verifying it) is usually much greater than the
time spent decompressing. Doesn't work for XIP stages (assume all time spent decompressing. Doesn't work for XIP stages for obvious
ARCH_X86 for now) for obvious reasons. reasons.
config COMPRESS_BOOTBLOCK config COMPRESS_BOOTBLOCK
bool bool
@ -1370,7 +1370,7 @@ config COMPRESS_RAMSTAGE
default y if !UNCOMPRESSED_RAMSTAGE default y if !UNCOMPRESSED_RAMSTAGE
config COMPRESS_PRERAM_STAGES config COMPRESS_PRERAM_STAGES
depends on !ARCH_X86 depends on (HAVE_ROMSTAGE || HAVE_VERSTAGE) && NO_XIP_EARLY_STAGES
default y default y
config INCLUDE_CONFIG_FILE config INCLUDE_CONFIG_FILE