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/WORKSPACE b/WORKSPACE
index ac7e314..7abd0c6 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -94,9 +94,23 @@
linux_kernel_version = "4.19.72"
+# If we don't do this we're double-building Linux, once for the toolchain and once for the target
+make_gen_init_cpio_available = """
+load("@rules_cc//cc:defs.bzl", "cc_binary")
+cc_binary(name = "gen_init_cpio", srcs = ["usr/gen_init_cpio.c"], visibility = ["//visibility:public"])
+"""
+
http_archive(
name = "linux_kernel",
- build_file_content = all_content,
+ build_file_content = all_content + "\n" + make_gen_init_cpio_available,
+ patch_args = ["-p1"],
+ patches = [
+ # Fix is in mainline, but upstream hasn't backported it to 4.19.
+ # Will go away when we switch to 5.4 LTS
+ "@//core/build/linux_kernel:kbuild-add--fcf-protection-none-to-retpoline-flags.patch",
+ # Enable built-in cmdline for efistub
+ "@//core/build/linux_kernel:0001-x86-Allow-built-in-command-line-to-work-in-early-ker.patch",
+ ],
sha256 = "f9fcb6b3bd29115ac55fc154e300c3dce2044502732f6842ad6c25e6f9f51f6d",
strip_prefix = "linux-" + linux_kernel_version,
urls = ["https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-%s.tar.xz" % linux_kernel_version],
@@ -161,7 +175,7 @@
name = "kubernetes",
patch_args = ["-p1"],
patches = [
- "@//core/build/kubernetes:0001-avoid-unexpected-keyword-error-by-using-positional-p.patch"
+ "@//core/build/kubernetes:0001-avoid-unexpected-keyword-error-by-using-positional-p.patch",
],
sha256 = "21d884b67abd1182958313474a40678ba8f3713e6b6f520401e42c02ba6ea302",
urls = ["https://dl.k8s.io/v%s/kubernetes-src.tar.gz" % k8s_version],
@@ -174,4 +188,4 @@
sha256 = "f6d65480241ec0fd7a0d01f432938b97d7395aeb8eefbe859bb877c9b4eafa56",
strip_prefix = "repo-infra-9f4571ad7242bf3ec4b47365062498c2528f9a5f",
urls = mirror("https://github.com/kubernetes/repo-infra/archive/9f4571ad7242bf3ec4b47365062498c2528f9a5f.tar.gz"),
-)
\ No newline at end of file
+)