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efi_loader: add bootmgr

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Similar to a "real" UEFI implementation, the bootmgr looks at the
BootOrder and BootXXXX variables to try to find an EFI payload to load
and boot.  This is added as a sub-command of bootefi.

The idea is that the distro bootcmd would first try loading a payload
via the bootmgr, and then if that fails (ie. first boot or corrupted
EFI variables) it would fallback to loading bootaa64.efi.  (Which
would then load fallback.efi which would look for \EFI\*\boot.csv and
populate BootOrder and BootXXXX based on what it found.)

Signed-off-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Rob Clark
2017-09-13 18:05:38 -04:00
committed by Alexander Graf
parent ad644e7c18
commit 9975fe96b6
8 changed files with 247 additions and 6 deletions
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4
include/efi_api.h
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@ -211,6 +211,10 @@ struct efi_runtime_services {
EFI_GUID(0x00000000, 0x0000, 0x0000, 0x00, 0x00, \
0x00, 0x00, 0x00, 0x00, 0x00, 0x00)
#define EFI_GLOBAL_VARIABLE_GUID \
EFI_GUID(0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, \
0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c)
#define LOADED_IMAGE_PROTOCOL_GUID \
EFI_GUID(0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, \
0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)