diff options
| author | Ilias Apalodimas <ilias.apalodimas@linaro.org> | 2020-02-21 09:55:45 +0200 |
|---|---|---|
| committer | Heinrich Schuchardt <xypron.glpk@gmx.de> | 2020-02-28 19:37:14 +0100 |
| commit | ec80b4735a593961fe701cc3a5d717d4739b0fd0 (patch) | |
| tree | 95f61efe72fd10b5fb77ad5b9d502baf82573565 /include/efi_loader.h | |
| parent | 12fdbbe860f395575f360f0c03d84bce61a9a212 (diff) | |
efi_loader: Implement FileLoad2 for initramfs loading
Following kernel's proposal for an arch-agnostic initrd loading
mechanism [1] let's implement the U-boot counterpart.
This new approach has a number of advantages compared to what we did up
to now. The file is loaded into memory only when requested limiting the
area of TOCTOU attacks. Users will be allowed to place the initramfs
file on any u-boot accessible partition instead of just the ESP one.
Finally this is an attempt of a generic interface across architectures
in the linux kernel so it makes sense to support that.
The file location is intentionally only supported as a config option
argument(CONFIG_EFI_INITRD_FILESPEC), in an effort to enhance security.
Although U-boot is not responsible for verifying the integrity of the
initramfs, we can enhance the offered security by only accepting a
built-in option, which will be naturally verified by UEFI Secure Boot.
This can easily change in the future if needed and configure that via ENV
or UEFI variable.
[1] https://lore.kernel.org/linux-efi/20200207202637.GA3464906@rani.riverdale.lan/T/#m4a25eb33112fab7a22faa0fd65d4d663209af32f
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Diffstat (limited to 'include/efi_loader.h')
| -rw-r--r-- | include/efi_loader.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/efi_loader.h b/include/efi_loader.h index d4c59b54c4..8e34379833 100644 --- a/include/efi_loader.h +++ b/include/efi_loader.h @@ -378,6 +378,7 @@ efi_status_t efi_gop_register(void); efi_status_t efi_net_register(void); /* Called by bootefi to make the watchdog available */ efi_status_t efi_watchdog_register(void); +efi_status_t efi_initrd_register(void); /* Called by bootefi to make SMBIOS tables available */ /** * efi_acpi_register() - write out ACPI tables |