> From: Heinrich Schuchardt <[email protected]> > Date: Fri, 11 Oct 2024 19:33:40 +0200
Hi Heinrich, > 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. It also says: "If the global variable is not present, then an installer or application must act as if a value of 0 was returned." So until we support any of those extras, we don't have to provide that variable. > [1] 3.1.4 Boot Manager Capabilities, UEFI Specification 2.10 Errata A, > > Cc: Vincent Stehlé <[email protected]> > Signed-off-by: Heinrich Schuchardt <[email protected]> > --- > 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) > -- > 2.45.2 > >
