[U-Boot] [PATCH v7 0/7] cmd: add efidebug for efi environment

AKASHI Takahiro takahiro.akashi at linaro.org
Thu Feb 21 06:26:45 UTC 2019 

This patch set is a collection of patches to enhance efi user interfaces
/commands. It will help improve user experience on efi boot and make it
more usable *without* edk2's shell utility.

Let's see how it works:
=> efidebug boot add 1 SHELL scsi 1:1 /Shell.efi ""
=> efidebug boot add 2 HELLO scsi 1:1 /hello.efi ""
=> efidebug boot dump
Boot0001:
	attributes: A-- (0x00000001)
	label: SHELL
	file_path: /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)/Scsi(1,0)/HD(1,MBR,0x086246ba,0x800,0x40000)/\\Shell.efi
	data: 
Boot0002:
	attributes: A-- (0x00000001)
	label: HELLO
	file_path: /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)/Scsi(1,0)/HD(1,MBR,0x086246ba,0x800,0x40000)/\\hello.efi
	data:

=> efidebug boot order 1 2
=> efidebug boot order
 1: Boot0001: SHELL
 2: Boot0002: HELLO

=> run -e Boot0002 (or bootefi bootmgr - 2)	; '-' means no dtb specified
WARNING: booting without device tree
Booting: HELLO
## Starting EFI application at 000000007db8b040 ...
Hello, world!
## Application terminated, r = 0

=> env set -e PlatformLang en			; important!
=> env print -e
Boot0001: BS|RT, DataSize = 0x79
    00000000: 01 00 00 00 66 00 53 00 48 00 45 00 4c 00 4c 00  ....f.S.H.E.L.L.
    00000010: 00 00 01 04 14 00 b9 73 1d e6 84 a3 cc 4a ae ab  .......s.....J..
    00000020: 82 e8 28 f3 62 8b 03 02 08 00 01 00 00 00 04 01  ..(.b...........
    00000030: 2a 00 01 00 00 00 00 08 00 00 00 00 00 00 00 00  *...............
    00000040: 04 00 00 00 00 00 ba 46 62 08 00 00 00 00 00 00  .......Fb.......
    00000050: 00 00 00 00 00 00 01 01 04 04 1c 00 5c 00 5c 00  ............\.\.
    00000060: 53 00 68 00 65 00 6c 00 6c 00 2e 00 65 00 66 00  S.h.e.l.l...e.f.
    00000070: 69 00 00 00 7f ff 04 00 00                       i........
Boot0002: BS|RT, DataSize = 0x79
    00000000: 01 00 00 00 66 00 48 00 45 00 4c 00 4c 00 4f 00  ....f.H.E.L.L.O.
    00000010: 00 00 01 04 14 00 b9 73 1d e6 84 a3 cc 4a ae ab  .......s.....J..
    00000020: 82 e8 28 f3 62 8b 03 02 08 00 01 00 00 00 04 01  ..(.b...........
    00000030: 2a 00 01 00 00 00 00 08 00 00 00 00 00 00 00 00  *...............
    00000040: 04 00 00 00 00 00 ba 46 62 08 00 00 00 00 00 00  .......Fb.......
    00000050: 00 00 00 00 00 00 01 01 04 04 1c 00 5c 00 5c 00  ............\.\.
    00000060: 68 00 65 00 6c 00 6c 00 6f 00 2e 00 65 00 66 00  h.e.l.l.o...e.f.
    00000070: 69 00 00 00 7f ff 04 00 00                       i........
BootOrder: BS|RT, DataSize = 0x4
    00000000: 01 00 02 00                                      ....
PlatformLang: BS|RT, DataSize = 0x2
    00000000: 65 6e                                            en

=> run -e Boot0001 or bootefi bootmgr

   (UEFI shell ...)

"env set" command now supports UEFI shell-like syntax:

=> env set -e foo =S\"akashi\" =0x012345 =Habcdef
=> env print -e foo
foo: BS|RT, DataSize = 0xd
    00000000: 61 6b 61 73 68 69 45 23 01 00 ab cd ef           akashiE#.....

Other useful sub commands are:
=> efidebug devices				; print uefi devices
=> efidebug drivers				; print uefi drivers
=> efidebug dh					; print uefi handles
=> efidebug images				; print loaded images
=> efidebug memmap				; dump uefi memory map

Enjoy!
-Takahiro Akashi

Changes in v7 (Feb 21, 2019)
* fix travis errors
* make CMD_NVEDIT_EFI configurable
* improve command help text
* add function descriptions at every function
* output error message when "boot add" fails
* use locate_handle_buffer() instead of locate_handle()
* use allocate_pool() instead of malloc()
* wrap EFI function calls with EFI_CALL

* Travis CI result:
    https://travis-ci.org/t-akashi/u-boot/builds/496298404

Changes in v6 (Jan 24, 2019)
* re-organize the code so that we can compile in "env [set|print] -e"
  support with or without CONFIG_CMD_EFIDEBUG
* remove "efidebug setvar" and "efidebug dumpvar" sub-commands
* re-implement "env print -e" using GetNextVariableName API
  and print_hex_dump()
* "env print -e" print more information, including attributes and size
* change a header format at "devices" and "drivers" sub-commands

Changes in v5 (Jan 21, 2019)
* rename the command name from efitool to efidebug again
* add it to MAINTAINERS
* follow a standard way of adding sub commands
* allow "env -e" syntax without enabling CONFIG_CMD_EFIDEBUG
  (merging v4's patch#8 into patch#1)
* change "_"-prefixed function names
* change some internal variables' names
* not print an efi driver's name at "efidebug drivers", yet showing
  a device path
* change protocol name strings from char to u16 at "efidebug dh"
* add a helper function to print efi memory attributes at "efidebug memmap"

Changes in v4 (Jan 15, 2019)
* rename the command name from efishell to efitool
* use efi_uintn_t for "size" if appropriate
* correct a help text for "boot add" sub-command
* "boot" sub-command always takes a hexadecimal number
* use systab.boottime directly instead of a local variable, bs
* fix a bug in "setvar" sub-command
* fix a bug in "devices" and "dh" sub-command
* fix a bug in "memmap" sub-command
* add "boot next" sub-command to set BootNext variable
* "drivers" sub-command prints more useful info, including a driver's
  name which originates from a corresponding u-boot efi driver
* "dh" sub-commands prints more useful info, including a list of
  protocols which are bound to a given handle

Changes in v3 (Dec 18, 2018)
* split v2 into two separate patch series
* add CONFIG_CMD_EFISHELL to enable/disable efishell command
* add missing free() at several places in efishell command

Changes in v2 (Nov 5, 2018)
* modify efi_dp_from_name() for use in efishell
* rename efi_marshal_load_option() to efi_serialize_load_option(),
  taking a "struct efi_load_option" as an argument
* improve a format in dumping uefi variables
* enhance a setvar syntax as efi's shell does
* change a syntax from "bootefi bootmgr -2" to "bootefi bootmgr - 2"
* add -e option to run command
* add -e option to env command
* add more sub-commands

AKASHI Takahiro (7):
  cmd: env: add "-e" option for handling UEFI variables
  cmd: add efidebug command
  cmd: efidebug: add devices command
  cmd: efidebug: add drivers command
  cmd: efidebug: add dh command
  cmd: efidebug: add images command
  cmd: efidebug: add memmap command

 MAINTAINERS       |    2 +
 cmd/Kconfig       |   20 +
 cmd/Makefile      |    2 +
 cmd/efidebug.c    | 1038 +++++++++++++++++++++++++++++++++++++++++++++
 cmd/nvedit.c      |   28 +-
 cmd/nvedit_efi.c  |  395 +++++++++++++++++
 include/command.h |    8 +
 7 files changed, 1492 insertions(+), 1 deletion(-)
 create mode 100644 cmd/efidebug.c
 create mode 100644 cmd/nvedit_efi.c

-- 
2.20.1

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