linux/drivers/firmware/efi/libstub
Arvind Sankar d5cdf4cfea efi/x86: Don't relocate the kernel unless necessary
Add alignment slack to the PE image size, so that we can realign the
decompression buffer within the space allocated for the image.

Only relocate the kernel if it has been loaded at an unsuitable address:

 - Below LOAD_PHYSICAL_ADDR, or
 - Above 64T for 64-bit and 512MiB for 32-bit

For 32-bit, the upper limit is conservative, but the exact limit can be
difficult to calculate.

Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200303221205.4048668-6-nivedita@alum.mit.edu
Link: https://lore.kernel.org/r/20200308080859.21568-20-ardb@kernel.org
2020-03-08 09:58:22 +01:00
..
arm32-stub.c efi/libstub/arm: Make efi_entry() an ordinary PE/COFF entrypoint 2020-02-22 23:37:37 +01:00
arm64-stub.c efi/libstub: Use hidden visibility for all source files 2020-02-23 21:57:12 +01:00
arm-stub.c efi/libstub: Take noinitrd cmdline argument into account for devpath initrd 2020-02-23 21:59:42 +01:00
efi-stub-helper.c efi/libstub/x86: Make loaded_image protocol handling mixed mode safe 2020-02-23 21:59:42 +01:00
efistub.h efi/libstub/x86: Use Exit() boot service to exit the stub on errors 2020-02-23 21:59:42 +01:00
fdt.c efi/libstub: Simplify efi_high_alloc() and rename to efi_allocate_pages() 2020-02-23 21:57:15 +01:00
file.c efi/libstub: Fix error message in handle_cmdline_files() 2020-02-23 21:57:31 +01:00
gop.c efi/libstub: Rename efi_call_early/_runtime macros to be more intuitive 2019-12-25 10:49:25 +01:00
hidden.h efi/libstub: Use hidden visibility for all source files 2020-02-23 21:57:12 +01:00
Makefile efi/libstub: Clean up command line parsing routine 2020-02-23 21:57:15 +01:00
mem.c efi/libstub: Describe efi_relocate_kernel() 2020-02-23 21:57:15 +01:00
pci.c efi: Allow disabling PCI busmastering on bridges during boot 2020-01-10 18:55:04 +01:00
random.c efi/libstub: Describe RNG functions 2020-02-23 21:57:19 +01:00
randomalloc.c efi/libstub: Move efi_random_alloc() into separate source file 2020-02-23 21:57:15 +01:00
secureboot.c efi/libstub: Rename efi_call_early/_runtime macros to be more intuitive 2019-12-25 10:49:25 +01:00
skip_spaces.c efi/libstub: Clean up command line parsing routine 2020-02-23 21:57:15 +01:00
string.c efi/libstub: Clean up command line parsing routine 2020-02-23 21:57:15 +01:00
tpm.c efi/libstub: Rename efi_call_early/_runtime macros to be more intuitive 2019-12-25 10:49:25 +01:00
x86-stub.c efi/x86: Don't relocate the kernel unless necessary 2020-03-08 09:58:22 +01:00