From: "H. Peter Anvin" (Intel) <h...@zytor.com> When compiling on a different machine than the runtime target, including but not limited to simulators, it is rather handy to be able to produce a bootable image. The scripts for that in x86 are relatively old, and assume a BIOS system.
This adds a build target to generate a hdimage which can be booted either from BIOS or EFI, and modernizes the genimage.sh script including adding the ability to add an arbitrary number of initramfs files (limited only by the length of the command line.) Possibly more controversial, at least from a Kbuild design perspective (as usual I'm the guy who wants to do something with Kbuild which it seems it was never really designed to do), is add the ability to create an initramfs image which includes all the built modules. Some distributions cannot be easily booted without modules in initramfs, and this creates an image which can be added to initramfs to provide the kernel modules, as finalized by "make modules_install". The final patch put these two together, and allows the modules initramfs to be included in the x86 boot image. --- Fixes in v2: 1/3: correct command line generation for multiple initrds 2/3: no change 3/3: append, don't overwrite FDINITRD when adding modules.img Makefile | 17 ++- arch/x86/Makefile | 8 +- arch/x86/boot/.gitignore | 1 + arch/x86/boot/Makefile | 62 +++++---- arch/x86/boot/genimage.sh | 294 +++++++++++++++++++++++++++++++------------ arch/x86/boot/mtools.conf.in | 3 + usr/.gitignore | 3 + usr/Kconfig | 31 ++--- usr/Makefile | 39 +++++- 9 files changed, 331 insertions(+), 127 deletions(-)
