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efi_loader: capsule: add capsule_on_disk support

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Capsule data can be loaded into the system either via UpdateCapsule
runtime service or files on a file system (of boot device).
The latter case is called "capsules on disk", and actual updates will
take place at the next boot time.

In this commit, we will support capsule on disk mechanism.

Please note that U-Boot itself has no notion of "boot device" and
all the capsule files to be executed will be detected only if they
are located in a specific directory, \EFI\UpdateCapsule, on a device
that is identified as a boot device by "BootXXXX" variables.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
This commit is contained in:
AKASHI Takahiro 2020-11-17 09:27:56 +09:00 • committed by Heinrich Schuchardt
parent 2bc27ca8a0
commit c74cd8bd08
5 changed files with 541 additions and 0 deletions
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8
lib/efi_loader/efi_setup.c
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@ -155,6 +155,10 @@ static efi_status_t efi_init_os_indications(void)
os_indications_supported |=
EFI_OS_INDICATIONS_CAPSULE_RESULT_VAR_SUPPORTED;
if (IS_ENABLED(CONFIG_EFI_CAPSULE_ON_DISK))
os_indications_supported |=
EFI_OS_INDICATIONS_FILE_CAPSULE_DELIVERY_SUPPORTED;
return efi_set_variable_int(L"OsIndicationsSupported",
&efi_global_variable_guid,
EFI_VARIABLE_BOOTSERVICE_ACCESS |
@ -282,6 +286,10 @@ efi_status_t efi_init_obj_list(void)
if (ret != EFI_SUCCESS)
goto out;
/* Execute capsules after reboot */
if (IS_ENABLED(CONFIG_EFI_CAPSULE_ON_DISK) &&
!IS_ENABLED(CONFIG_EFI_CAPSULE_ON_DISK_EARLY))
ret = efi_launch_capsules();
out:
efi_obj_list_initialized = ret;
return ret;