Up to now UEFI variables where stored in U-Boot environment variables. Saving UEFI variables was not possible without saving the U-Boot environment variables.
With this patch series file ubootefi.var in the EFI system partition is used for saving UEFI variables.
Furthermore the UEFI variables are exposed for reading at runtime.
v2: Rebase the series to consider OP-TEE based variables and authenticated variables. Do not enable SetVariable() at runtime as we cannot persist non-volatile variables at runtime. Display read-only attribute in printenv -e.
Heinrich Schuchardt (17): efi_loader: prepare for read only OP-TEE variables efi_loader: display RO attribute in printenv -e efi_loader: separate UEFI variable API from implemementation efi_loader: OsIndicationsSupported, PlatformLangCodes efi_loader: simplify boot manager efi_loader: keep attributes in efi_set_variable_int efi_loader: value of VendorKeys efi_loader: read-only AuditMode and DeployedMode efi_loader: secure boot flag efi_loader: UEFI variable persistence efi_loader: export efi_convert_pointer() efi_loader: optional pointer for ConvertPointer efi_loader: new function efi_memcpy_runtime() efi_loader: memory buffer for variables efi_loader: use memory based variable storage efi_loader: enable UEFI variables at runtime efi_selftest: adjust runtime test for variables
cmd/nvedit_efi.c | 24 +- doc/api/efi.rst | 2 + include/efi_api.h | 2 + include/efi_loader.h | 6 + include/efi_variable.h | 198 +++++ lib/efi_loader/Kconfig | 8 + lib/efi_loader/Makefile | 3 + lib/efi_loader/efi_bootmgr.c | 28 +- lib/efi_loader/efi_runtime.c | 35 +- lib/efi_loader/efi_setup.c | 59 +- lib/efi_loader/efi_var_common.c | 140 +++ lib/efi_loader/efi_var_file.c | 239 +++++ lib/efi_loader/efi_var_mem.c | 266 ++++++ lib/efi_loader/efi_variable.c | 823 ++++-------------- lib/efi_loader/efi_variable_tee.c | 130 +-- .../efi_selftest_variables_runtime.c | 13 +- 16 files changed, 1154 insertions(+), 822 deletions(-) create mode 100644 include/efi_variable.h create mode 100644 lib/efi_loader/efi_var_common.c create mode 100644 lib/efi_loader/efi_var_file.c create mode 100644 lib/efi_loader/efi_var_mem.c
-- 2.27.0