The UEFI variable BootOptionSupport is required by the UEFI specification [1]. It reports if specific types of boot options are honored.
We don't support any of these extras. So we should set the value 0.
[1] 3.1.4 Boot Manager Capabilities, UEFI Specification 2.10 Errata A,
Cc: Vincent Stehlé vincent.stehle@arm.com Signed-off-by: Heinrich Schuchardt heinrich.schuchardt@canonical.com --- lib/efi_loader/efi_setup.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+)
diff --git a/lib/efi_loader/efi_setup.c b/lib/efi_loader/efi_setup.c index a610e032d2f..05d035f4eb5 100644 --- a/lib/efi_loader/efi_setup.c +++ b/lib/efi_loader/efi_setup.c @@ -179,6 +179,22 @@ static efi_status_t efi_init_os_indications(void) &os_indications_supported, false); }
+/** + * efi_init_boot_options_support() - indicate supported boot option types + */ +static efi_status_t efi_init_boot_options_support(void) +{ + u32 boot_options_support = 0; + + return efi_set_variable_int(u"BootOptionSupport", + &efi_global_variable_guid, + EFI_VARIABLE_BOOTSERVICE_ACCESS | + EFI_VARIABLE_RUNTIME_ACCESS | + EFI_VARIABLE_READ_ONLY, + sizeof(boot_options_support), + &boot_options_support, false); +} + /** * efi_init_early() - handle initialization at early stage * @@ -261,6 +277,13 @@ efi_status_t efi_init_obj_list(void) if (ret != EFI_SUCCESS) goto out;
+ /* Indicate supported boot option types */ + if (IS_ENABLED(CONFIG_EFI_BOOTMGR)) { + ret = efi_init_boot_options_support(); + if (ret != EFI_SUCCESS) + goto out; + } + /* Initialize system table */ ret = efi_initialize_system_table(); if (ret != EFI_SUCCESS)