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[efi] Add ability to reboot to firmware setup menu

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Add the ability to reboot to the firmware setup menu (if supported) by
setting the relevant value in the OsIndications variable.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2025-04-28 14:01:17 +01:00
parent 7eaa2daf6f
commit 083e273bbc
3 changed files with 30 additions and 0 deletions
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src/interface/efi/efi_reboot.c
+23
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@@ -31,7 +31,9 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
*/
#include <errno.h>
#include <string.h>
#include <ipxe/efi/efi.h>
#include <ipxe/efi/Guid/GlobalVariable.h>
#include <ipxe/reboot.h>
/**
@@ -41,7 +43,28 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
*/
static void efi_reboot ( int flags ) {
EFI_RUNTIME_SERVICES *rs = efi_systab->RuntimeServices;
static CHAR16 wname[] = EFI_OS_INDICATIONS_VARIABLE_NAME;
UINT64 osind;
UINT32 attrs;
EFI_RESET_TYPE type;
EFI_STATUS efirc;
int rc;
/* Request boot to firmware setup, if applicable */
if ( flags & REBOOT_SETUP ) {
osind = EFI_OS_INDICATIONS_BOOT_TO_FW_UI;
attrs = ( EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_RUNTIME_ACCESS |
EFI_VARIABLE_NON_VOLATILE );
if ( ( efirc = rs->SetVariable ( wname, &efi_global_variable,
attrs, sizeof ( osind ),
&osind ) ) != 0 ) {
rc = -EEFI ( efirc );
DBGC ( efi_systab, "EFI could not set %ls: %s\n",
wname, strerror ( rc ) );
/* Continue to reboot anyway */
}
}
/* Use runtime services to reset system */
type = ( ( flags & REBOOT_WARM ) ? EfiResetWarm : EfiResetCold );