On Wed, Feb 01, 2023 at 02:25:38PM +0100, Ard Biesheuvel wrote: > The EFI spec v2.10 introduces a global flag in the memory attributes > table that indicates whether the EFI runtime code regions were emitted > with BTI landing pads, and can therefore tolerate being mapped with BTI > enforcement enabled. > > Add the generic plumbing for this, and wire it up for arm64. Looks nice! :) Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx> > > Cc: Catalin Marinas <catalin.marinas@xxxxxxx> > Cc: Will Deacon <will@xxxxxxxxxx> > Cc: Kees Cook <keescook@xxxxxxxxxxxx> > Cc: Mark Rutland <mark.rutland@xxxxxxx> > > Ard Biesheuvel (2): > efi: Discover BTI support in runtime services regions > efi: arm64: Wire up BTI annotation in memory attributes table > > arch/arm/include/asm/efi.h | 2 +- > arch/arm/kernel/efi.c | 5 +++-- > arch/arm64/include/asm/efi.h | 3 ++- > arch/arm64/kernel/efi.c | 18 +++++++++++++++--- > arch/riscv/include/asm/efi.h | 2 +- > arch/riscv/kernel/efi.c | 3 ++- > arch/x86/platform/efi/efi_64.c | 3 ++- > drivers/firmware/efi/memattr.c | 9 +++++++-- > include/linux/efi.h | 8 ++++++-- > 9 files changed, 39 insertions(+), 14 deletions(-) > > -- > 2.39.0 > -- Kees Cook
