This is updated series based on v3 version sent here
https://lore.kernel.org/all/[email protected]/
that's why I am continuing on v4 instead of starting from scratch.
Tested on kv260 with saving variables to location where User MTD partition
is.
CONFIG_EFI_VARIABLE_SF_STORE=y
CONFIG_EFI_RT_VOLATILE_STORE=y
CONFIG_EFI_VARIABLE_SF_OFFSET=0x22a0000
In Linux:
root@som:~# mount | grep efivars
none on /sys/firmware/efi/efivars type efivarfs (rw,relatime)
root@som:~# printf '\x07\x00\x00\x00Hello' \
| sudo tee
/sys/firmware/efi/efivars/TestVar-12345678-1234-1234-1234-123456789abc
Helloroot@som:~#
root@som:~# dd
if=/sys/firmware/efi/efivars/VarToFile-b2ac5fc9-92b7-4acd-aeac-11e818c3130c \
of=/tmp/vars skip=4 bs=1
1352+0 records in
1352+0 records out
1352 bytes (1.4 kB, 1.3 KiB) copied, 0.380992 s, 3.5 kB/s
root@som:~# flashcp /tmp/vars /dev/mtd16
root@som:~# reboot
Reboot and then in U-Boot:
ZynqMP> pri -e
...
TestVar:
12345678-1234-1234-1234-123456789abc (12345678-1234-1234-1234-123456789abc)
NV|BS|RT, DataSize = 0x5
00000000: 48 65 6c 6c 6f Hello
...
Thanks,
Michal
Changes in v5:
- Invert logic in efi_variable.c and avoid #if
Changes in v4:
- New patch based on review comments from v3
- Extend Kconfig description
- Extend commit message and describe efivar missing part
- use unify methods for reading/writing variable
Changes in v3:
- Fixed compiler warnings.
Changes in v2:
- Refactored efi_var_file to move common parts out as requested
- Changed ifdefs to use CONFIG_IS_DEFINED
- Fixed typos
Michal Simek (1):
efi_var: Unify read/write access helper function
Shantur Rathore (2):
efi_var_file: refactor to move buffer functions
efi_vars: Implement SPI Flash store
include/efi_variable.h | 18 +++----
lib/efi_loader/Kconfig | 34 +++++++++++-
lib/efi_loader/Makefile | 3 +-
lib/efi_loader/efi_var_common.c | 42 +++++++++++++++
lib/efi_loader/efi_var_file.c | 65 ++---------------------
lib/efi_loader/efi_var_sf.c | 92 +++++++++++++++++++++++++++++++++
lib/efi_loader/efi_variable.c | 19 ++++---
7 files changed, 195 insertions(+), 78 deletions(-)
create mode 100644 lib/efi_loader/efi_var_sf.c
--
2.43.0
base-commit: f1e312364c7ea2bc4936472dda22b8c0447cdb03
branch: debian-sent3
