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[PATCH v2 0/8] linux: implement LoadFile2 initrd loading
From: |
Ard Biesheuvel |
Subject: |
[PATCH v2 0/8] linux: implement LoadFile2 initrd loading |
Date: |
Sun, 25 Oct 2020 14:49:33 +0100 |
This implements the LoadFile2 initrd loading protocol, which is
essentially a callback face into the bootloader to load the initrd
data into a caller provided buffer. This means the bootloader no
longer has to contain any policy regarding where to load the initrd
(which differs between architectures and kernel versions) and no
longer has to manipulate arch specific data structures such as DT
or struct bootparams to inform the OS where the initrd resides in
memory.
Sample output from booting a recent Linux/arm64 kernel:
grub> insmod part_msdos
grub> linux (hd0,msdos1)/Image
grub> initrd (hd0,msdos1)/initrd.img
grub> boot
EFI stub: Booting Linux Kernel...
EFI stub: EFI_RNG_PROTOCOL unavailable, KASLR will be disabled
EFI stub: Generating empty DTB
EFI stub: Loaded initrd from LINUX_EFI_INITRD_MEDIA_GUID device path
EFI stub: Exiting boot services and installing virtual address map...
[ 0.000000] Booting Linux on physical CPU 0x0000000000 [0x411fd070]
Cc: grub-devel@gnu.org
Cc: daniel.kiper@oracle.com
Cc: leif@nuviainc.com
Changes since v1:
- add Leif's ack to #2, #6 and #8
- add patch #1 to fix the ARM Linux image header definition
- add patches #3, #4 and #5 to unify and reuse the COFF header loading routines
from Xen (and the absence of which from v1 was causing garbage to be read and
interpreted as the image major version)
Ard Biesheuvel (8):
linux/arm: fix ARM Linux header layout
loader/linux: permit NULL argument for argv[] in grub_initrd_load()
efi: move MS-DOS stub out of generic PE header definition
linux/arm: unify ARM/arm64 vs Xen PE/COFF header handling
linux/arm: account for COFF headers appearing at unexpected offsets
efi: add definition of LoadFile2 protocol
efi: implement LoadFile2 initrd loading protocol for Linux
linux: ignore FDT unless we need to modify it
grub-core/commands/efi/lsefi.c | 1 +
grub-core/kern/efi/efi.c | 5 +-
grub-core/loader/arm64/linux.c | 158 +++++++++++++++++---
grub-core/loader/arm64/xen_boot.c | 23 +--
grub-core/loader/efi/fdt.c | 7 +-
grub-core/loader/linux.c | 2 +-
include/grub/arm/linux.h | 8 +-
include/grub/arm64/linux.h | 4 +
include/grub/efi/api.h | 15 ++
include/grub/efi/efi.h | 4 +-
include/grub/efi/pe32.h | 5 +-
11 files changed, 185 insertions(+), 47 deletions(-)
--
2.17.1
- [PATCH v2 0/8] linux: implement LoadFile2 initrd loading,
Ard Biesheuvel <=
- [PATCH v2 1/8] linux/arm: fix ARM Linux header layout, Ard Biesheuvel, 2020/10/25
- [PATCH v2 2/8] loader/linux: permit NULL argument for argv[] in grub_initrd_load(), Ard Biesheuvel, 2020/10/25
- [PATCH v2 3/8] efi: move MS-DOS stub out of generic PE header definition, Ard Biesheuvel, 2020/10/25
- [PATCH v2 4/8] linux/arm: unify ARM/arm64 vs Xen PE/COFF header handling, Ard Biesheuvel, 2020/10/25
- [PATCH v2 5/8] linux/arm: account for COFF headers appearing at unexpected offsets, Ard Biesheuvel, 2020/10/25
- [PATCH v2 6/8] efi: add definition of LoadFile2 protocol, Ard Biesheuvel, 2020/10/25
- [PATCH v2 7/8] efi: implement LoadFile2 initrd loading protocol for Linux, Ard Biesheuvel, 2020/10/25
- [PATCH v2 8/8] linux: ignore FDT unless we need to modify it, Ard Biesheuvel, 2020/10/25