Build core with separate initramfs
Build the initramfs separately and include it via mkimage. Also includes
a patch to the kernel which adds support for hardcoded cmdline
to the Linux efistub.
This lowers build times by a lot, for normal changes they are now
below 5s
Test Plan: Ran `bazel run //core/scripts:launch`
X-Origin-Diff: phab/D245
GitOrigin-RevId: 206c7c5c979c10ffd25c36dfefd8b9290a6a3f43
diff --git a/core/build/linux_kernel/linux-signos.config b/core/build/linux_kernel/linux-signos.config
index cec3ff6..e2fcdf3 100644
--- a/core/build/linux_kernel/linux-signos.config
+++ b/core/build/linux_kernel/linux-signos.config
@@ -118,17 +118,12 @@
# CONFIG_SYSFS_DEPRECATED is not set
# CONFIG_RELAY is not set
CONFIG_BLK_DEV_INITRD=y
-CONFIG_INITRAMFS_SOURCE="initramfs.list"
-CONFIG_INITRAMFS_ROOT_UID=0
-CONFIG_INITRAMFS_ROOT_GID=0
# CONFIG_RD_GZIP is not set
# CONFIG_RD_BZIP2 is not set
# CONFIG_RD_LZMA is not set
# CONFIG_RD_XZ is not set
# CONFIG_RD_LZO is not set
-# CONFIG_RD_LZ4 is not set
-CONFIG_INITRAMFS_COMPRESSION_NONE=y
-CONFIG_INITRAMFS_COMPRESSION=""
+CONFIG_RD_LZ4=y
CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE=y
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
CONFIG_SYSCTL=y
@@ -374,7 +369,7 @@
# CONFIG_LEGACY_VSYSCALL_EMULATE is not set
CONFIG_LEGACY_VSYSCALL_NONE=y
CONFIG_CMDLINE_BOOL=y
-CONFIG_CMDLINE="earlyprintk=ttyS0 console=ttyS0"
+CONFIG_CMDLINE="console=ttyS0 initrd=\\EFI\\smalltown\\initramfs.cpio.lz4"
CONFIG_CMDLINE_OVERRIDE=y
CONFIG_MODIFY_LDT_SYSCALL=y
CONFIG_HAVE_LIVEPATCH=y