efi/libstub/tpm.c

1 // SPDX-License-Identifier: GPL-2.0
24  * Enable reboot attack mitigation. This requests that the firmware clear the
25  * RAM on next reboot before proceeding with boot, ensuring that any secrets
27  * from RAM before reboot it can simply reset this variable.
101 			 * back into a size is contained in the first entry -  in efi_retrieve_tpm2_eventlog()
112 			   ((struct tcpa_event *) last_entry_addr)->event_size;  in efi_retrieve_tpm2_eventlog()
114 		log_size = log_last_entry - log_location + last_entry_size;  in efi_retrieve_tpm2_eventlog()
132 	if (final_events_table && final_events_table->nr_events) {  in efi_retrieve_tpm2_eventlog()
134 		int offset;  in efi_retrieve_tpm2_eventlog()  local
137 		int i = final_events_table->nr_events;  in efi_retrieve_tpm2_eventlog()
140 		offset = sizeof(final_events_table->version) +  in efi_retrieve_tpm2_eventlog()
141 			sizeof(final_events_table->nr_events);  in efi_retrieve_tpm2_eventlog()
144 			header = data + offset + final_events_size;  in efi_retrieve_tpm2_eventlog()
149 			i--;  in efi_retrieve_tpm2_eventlog()
154 	log_tbl->size = log_size;  in efi_retrieve_tpm2_eventlog()
155 	log_tbl->final_events_preboot_size = final_events_size;  in efi_retrieve_tpm2_eventlog()
156 	log_tbl->version = version;  in efi_retrieve_tpm2_eventlog()
157 	memcpy(log_tbl->log, (void *) first_entry_addr, log_size);  in efi_retrieve_tpm2_eventlog()