efi: libstub/tpm: enable tpm eventlog function for ARM platforms

Wire up the existing code for ARM that loads the TPM event log into
OS accessible buffers while running the EFI stub so that the kernel
proper can access it at runtime.

Tested-by: Zou Cao <[email protected]>
Signed-off-by: Xinwei Kong <[email protected]>
Signed-off-by: Ard Biesheuvel <[email protected]>

Author: Xinwei Kong

drivers/firmware/efi/libstub/arm-stub.c

@@ -189,6 +189,8 @@ unsigned long efi_entry(void *handle, efi_system_table_t *sys_table,
 		goto fail_free_cmdline;
 	}
 
+	efi_retrieve_tpm2_eventlog(sys_table);
+
 	/* Ask the firmware to clear memory on unclean shutdown */
 	efi_enable_reset_attack_mitigation(sys_table);