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u-boot/lib/efi_loader
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Masahisa Kojima 3fa9ed9ae3 efi_loader: update the timing of enabling and disabling EFI watchdog 
UEFI specification requires that 5 minutes watchdog timer is
armed before the firmware's boot manager invokes an EFI boot option.
This watchdog timer is updated as follows, according to the
UEFI specification.

 1) The EFI Image may reset or disable the watchdog timer as needed.
 2) If control is returned to the firmware's boot manager,
    the watchdog timer must be disabled.
 3) On successful completion of EFI_BOOT_SERVICES.ExitBootServices()
    the watchdog timer is disabled.

1) is up to the EFI image, and 3) is already implemented in U-Boot.
This patch implements 2), the watchdog is disabled when control is
returned to U-Boot.

In addition, current implementation arms the EFI watchdog at only
the first "bootefi" invocation. The EFI watchdog must be armed
in every EFI boot option invocation.

Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2022-02-26 07:37:01 +01:00
..
.gitignore efi_loader: git ignore helloworld_efi.S 2020-01-07 18:08:20 +01:00
efi_acpi.c efi: Correct address handling with ACPI tables 2022-01-25 11:44:36 -07:00
efi_bootmgr.c efi: Use 16-bit unicode strings 2022-02-03 12:16:01 -05:00
efi_boottime.c efi_loader: use %zu not %zd to print efi_uintn_t 2022-02-05 20:20:01 +01:00
efi_capsule.c efi_loader: test/py: Reset system after capsule update on disk 2022-02-26 07:37:01 +01:00
efi_console.c efi_loader: add handle for UART 2022-02-05 20:20:01 +01:00
efi_device_path_to_text.c efi_loader: fix text output for Uart() DP nodes 2022-02-05 20:20:01 +01:00
efi_device_path_utilities.c doc: replace @return by Return: 2022-01-19 18:11:34 +01:00
efi_device_path.c efi: Drop unnecessary calls to blk_find_device() 2022-02-05 20:20:01 +01:00
efi_disk.c efi_loader: efi_disk_register() should not fail 2021-11-26 21:30:59 +01:00
efi_dt_fixup.c efi_loader: Get rid of kaslr-seed if EFI_RNG_PROTOCOL is installed 2022-01-15 10:57:22 +01:00
efi_esrt.c efi_loader: use %pUs for printing GUIDs 2022-01-19 16:16:33 +01:00
efi_file.c efi_loader: correct function comment style 2022-01-29 10:23:40 +01:00
efi_firmware.c efi_loader: use %zu to print efi_uintn_t in FMP driver 2022-02-05 20:20:01 +01:00
efi_freestanding.c efi_loader: correct function comment style 2022-01-29 10:23:40 +01:00
efi_gop.c efi_loader: correct function comment style 2022-01-29 10:23:40 +01:00
efi_helper.c efi: Use 16-bit unicode strings 2022-02-03 12:16:01 -05:00
efi_hii_config.c efi_loader: use %pUs for printing GUIDs 2022-01-19 16:16:33 +01:00
efi_hii.c efi_loader: use %pUs for printing GUIDs 2022-01-19 16:16:33 +01:00
efi_image_loader.c efi_loader: fix dual signed image certification 2022-02-11 20:07:55 +01:00
efi_load_initrd.c efi_loader: avoid multiple local copies of lf2_initrd_guid 2021-10-21 03:46:04 +02:00
efi_load_options.c efi_loader: move load options to new module 2021-01-19 18:56:08 +01:00
efi_memory.c doc: replace @return by Return: 2022-01-19 18:11:34 +01:00
efi_net.c efi_loader: fix use after free in receive path 2020-10-19 22:59:53 +02:00
efi_riscv.c efi_loader: Enable RISCV_EFI_BOOT_PROTOCOL support 2022-01-29 10:23:40 +01:00
efi_rng.c efi_loader: use %pUs for printing GUIDs 2022-01-19 16:16:33 +01:00
efi_root_node.c efi_loader: remove EFI_UNICODE_COLLATION_PROTOCOL 2021-01-20 08:17:17 +01:00
efi_runtime.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
efi_setup.c efi: Use 16-bit unicode strings 2022-02-03 12:16:01 -05:00
efi_signature.c efi_loader: fix uefi secure boot with intermediate certs 2022-02-26 07:37:00 +01:00
efi_smbios.c doc: replace @return by Return: 2022-01-19 18:11:34 +01:00
efi_string.c efi: Use 16-bit unicode strings 2022-02-03 12:16:01 -05:00
efi_tcg2.c efi: Use 16-bit unicode strings 2022-02-03 12:16:01 -05:00
efi_unicode_collation.c efi_loader: carve out utf_to_cp() 2021-03-07 17:37:13 +01:00
efi_var_common.c efi: Use 16-bit unicode strings 2022-02-03 12:16:01 -05:00
efi_var_file.c efi_loader: don't load Shim's MOK database from file 2021-10-21 03:46:04 +02:00
efi_var_mem.c efi_loader: treat UEFI variable name as const 2021-10-25 21:13:06 +02:00
efi_var_seed.S efi_loader: pre-seed UEFI variables 2020-07-16 12:37:02 +02:00
efi_variable_tee.c efi: Use 16-bit unicode strings 2022-02-03 12:16:01 -05:00
efi_variable.c efi: Use 16-bit unicode strings 2022-02-03 12:16:01 -05:00
efi_watchdog.c efi_loader: update the timing of enabling and disabling EFI watchdog 2022-02-26 07:37:01 +01:00
helloworld.c efi: Use 16-bit unicode strings 2022-02-03 12:16:01 -05:00
Kconfig efi_loader: Enable RISCV_EFI_BOOT_PROTOCOL support 2022-01-29 10:23:40 +01:00
Makefile efi_loader: Enable RISCV_EFI_BOOT_PROTOCOL support 2022-01-29 10:23:40 +01:00