On Thu, 15 Feb 2024 at 12:12, Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > > On Thu, Feb 15, 2024 at 10:41:57AM +0100, Ard Biesheuvel wrote: > > On Thu, 15 Feb 2024 at 10:27, Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > > > > > > On Thu, Feb 15, 2024 at 10:17:20AM +0100, Ard Biesheuvel wrote: > > > > (cc stakeholders from various distros - apologies if I missed anyone) > > > > > > > > Please consider the patches below for backporting to the linux-6.6.y > > > > stable tree. > > > > > > > > These are prerequisites for building a signed x86 efistub kernel image > > > > that complies with the tightened UEFI boot requirements imposed by > > > > MicroSoft, and this is the condition under which it is willing to sign > > > > future Linux secure boot shim builds with its 3rd party CA > > > > certificate. (Such builds must enforce a strict separation between > > > > executable and writable code, among other things) > > > > ... > > > And is this not an issue for 6.1.y as well? > > > > > > > It is, but there are many more changes that would need to go into v6.1: > > > > Documentation/x86/boot.rst | 2 +- > > arch/x86/Kconfig | 17 + > > arch/x86/boot/Makefile | 2 +- > > arch/x86/boot/compressed/Makefile | 13 +- > > arch/x86/boot/compressed/efi_mixed.S | 328 ++++++++++++++ > > arch/x86/boot/compressed/efi_thunk_64.S | 195 -------- > > arch/x86/boot/compressed/head_32.S | 38 +- > > arch/x86/boot/compressed/head_64.S | 593 +++++-------------------- > > arch/x86/boot/compressed/mem_encrypt.S | 152 ++++++- > > arch/x86/boot/compressed/misc.c | 61 ++- > > arch/x86/boot/compressed/misc.h | 2 - > > arch/x86/boot/compressed/pgtable.h | 10 +- > > arch/x86/boot/compressed/pgtable_64.c | 87 ++-- > > arch/x86/boot/compressed/sev.c | 112 +++-- > > arch/x86/boot/compressed/vmlinux.lds.S | 6 +- > > arch/x86/boot/header.S | 215 ++++----- > > arch/x86/boot/setup.ld | 14 +- > > arch/x86/boot/tools/build.c | 271 +---------- > > arch/x86/include/asm/boot.h | 8 + > > arch/x86/include/asm/efi.h | 14 +- > > arch/x86/include/asm/sev.h | 7 + > > drivers/firmware/efi/libstub/Makefile | 8 +- > > drivers/firmware/efi/libstub/alignedmem.c | 5 +- > > drivers/firmware/efi/libstub/arm64-stub.c | 6 +- > > drivers/firmware/efi/libstub/efi-stub-helper.c | 2 + > > drivers/firmware/efi/libstub/efistub.h | 28 +- > > drivers/firmware/efi/libstub/mem.c | 3 +- > > drivers/firmware/efi/libstub/randomalloc.c | 13 +- > > drivers/firmware/efi/libstub/x86-5lvl.c | 95 ++++ > > drivers/firmware/efi/libstub/x86-stub.c | 327 +++++++------- > > drivers/firmware/efi/libstub/x86-stub.h | 17 + > > include/linux/efi.h | 1 + > > 32 files changed, 1204 insertions(+), 1448 deletions(-) > > ... > > If you're happy to take these too, I can give you the proper list, but > > perhaps we should deal with v6.6 first? > > Yeah, let's deal with 6.6 first :) > > What distros are going to need/want this for 6.1.y? Will normal users > care as this is only for a new requirement by Microsoft, not for older > releases, right? > I will let the distro folks on cc answer this one.
