This patch series adds support to boot a locally attached
UEFI disk. The disk must installed with a EFI System Partition
and filesystem.
This improves upon the current solution to boot a local UEFI
disk from iPXE - which requires one to exit out of iPXE to fallback
into the EFI boot manager. This solution allows iPXE to boot a
UEFI disk directly and stay in control if the boot fails.
Example syntax to boot a local UEFI disk:
> sanboot --no-describe --drive 0 --filename \EFI\redhat\grubx64.efi
This syntax is very similar and consistent with the
syntax currently used to boot a local legacy HDD, i.e.:
> sanboot --no-describe --drive 0x80
The extra --filename argument is required for UEFI as the UEFI
spec allows the bootloader to be located in non-standard
locations on the disk. The --filename is optional and if omitted,
the standard spec defined default filepath will be used, e.g.
\EFI\BOOT\BOOTX64.efi on x86_64.
This patch series also includes a new efimap command which
displays a map of all locally attached UEFI filesystems.
Example output of the efimap command is as follows:
iPXE> efimap
Drive# [Volume Label] Path
------ -------------------
0 [ORACLE LINUX]
PciRoot(0x0)/Pci(0x3,0x0)/HD(2,MBR,0x2E0E0369,0xBBC,0x3708)
1 [DATA DISK3]
PciRoot(0x0)/Pci(0x5,0x0)/HD(1,GPT,F82F29A0-...,0x800,0x64000)
2 [NO VOLUME LABEL]
PciRoot(0x0)/Pci(0x6,0x0)/HD(1,GPT,F82F29A0-...,0x64000)
Note that in the event that the UEFI EFI_DEVICE_PATH_TO_TEXT protocol is
not implemented on a system, the output of the efimap will contain a hex
string dump of the device path, like so:
iPXE> efimap
Drive# [Volume Label] Path
------ -------------------
0 [ORACLE LINUX] 02010c00d041030a0000000001010600000304012a0002...
1 [DATA DISK3] 02010c00d041030a0000000001010600000404012a000100...
2 [NO VOLUME LABEL] 02010c00d041030a0000000001010600000504012a0...
The drive# from the efimap command can be passed as an argument to the
sanboot command --drive option to specify which disk/filesystem to boot.
Note that the mappings are sorted by device path which gives a
PCI BDF ordering as the device paths typically begin with
PciRoot()/Pci() nodes. This sorting will help to give a consistent
mapping between boots.
Testing:
This patchset was testing in a virtual/cloud environment with QEMU
attached PV disks and also on a baremetal system.
v2 Changes:
- Removed 1st (strcmp/strncmp fix) patch from original series since it was
pulled.
- Improved efimap output to include the Volume Label (if present) to
aid in identifying boot drives/filesystems.
Aaron Young (3):
Implement scaffolding for new efimap command.
Call efi_boot_local() from efi_block_boot()
Complete implementation of efi_boot.c
src/config/config_efi.c | 8 +
src/config/general.h | 1 +
src/hci/commands/efimap_cmd.c | 77 +++++++
src/include/usr/efiboot.h | 15 ++
src/interface/efi/efi_block.c | 8 +-
src/interface/efi/efi_boot.c | 475 ++++++++++++++++++++++++++++++++++++++++++
6 files changed, 583 insertions(+), 1 deletion(-)
create mode 100644 src/hci/commands/efimap_cmd.c
create mode 100644 src/include/usr/efiboot.h
create mode 100644 src/interface/efi/efi_boot.c
--
1.8.3.1
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