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efi_loader: add boot variable measurement

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TCG PC Client PFP spec requires to measure "Boot####"
and "BootOrder" variables, EV_SEPARATOR event prior
to the Ready to Boot invocation.
Since u-boot does not implement Ready to Boot event,
these measurements are performed when efi_start_image() is called.

TCG spec also requires to measure "Calling EFI Application from
Boot Option" for each boot attempt, and "Returning from EFI
Application from Boot Option" if a boot device returns control
back to the Boot Manager.

Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
This commit is contained in:
Masahisa Kojima
2021-08-13 16:12:40 +09:00
committed by Heinrich Schuchardt
parent cfbcf054a3
commit 8fc4e0b427
4 changed files with 162 additions and 1 deletions
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4
include/efi_loader.h
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@@ -499,6 +499,10 @@ efi_status_t efi_run_image(void *source_buffer, efi_uintn_t source_size);
efi_status_t efi_init_variables(void);
/* Notify ExitBootServices() is called */
void efi_variables_boot_exit_notify(void);
/* Measure efi application invocation */
efi_status_t efi_tcg2_measure_efi_app_invocation(void);
/* Measure efi application exit */
efi_status_t efi_tcg2_measure_efi_app_exit(void);
/* Called by bootefi to initialize root node */
efi_status_t efi_root_node_register(void);
/* Called by bootefi to initialize runtime */