tcg2: decouple eventlog size from efi
Move default eventlog size from efi to tpm for using in both
efi and measured boot.
Signed-off-by: Raymond Mao <raymond.mao@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/doc/usage/measured_boot.rst b/doc/usage/measured_boot.rst
index 05c439e..488dd54 100644
--- a/doc/usage/measured_boot.rst
+++ b/doc/usage/measured_boot.rst
@@ -24,7 +24,6 @@
* A hardware TPM 2.0 supported by an enabled U-Boot driver
* CONFIG_EFI_TCG2_PROTOCOL=y
-* CONFIG_EFI_TCG2_PROTOCOL_EVENTLOG_SIZE=y
* optional CONFIG_EFI_TCG2_PROTOCOL_MEASURE_DTB=y will measure the loaded DTB
in PCR 1
diff --git a/drivers/tpm/Kconfig b/drivers/tpm/Kconfig
index d59102d..01bc686 100644
--- a/drivers/tpm/Kconfig
+++ b/drivers/tpm/Kconfig
@@ -209,6 +209,15 @@
to the device using the standard TPM Interface Specification (TIS)
protocol.
+config TPM2_EVENT_LOG_SIZE
+ int "EventLog size"
+ depends on TPM_V2
+ default 65536
+ help
+ Define the size of the EventLog. Note that this is going to be
+ allocated twice. One for the eventlog it self and one for the
+ configuration table that is required from the TCG2 spec
+
endif # TPM_V2
endmenu
diff --git a/include/efi_tcg2.h b/include/efi_tcg2.h
index 8dfb1bc..7ed8880 100644
--- a/include/efi_tcg2.h
+++ b/include/efi_tcg2.h
@@ -28,8 +28,6 @@
#define EFI_TCG2_MAX_PCR_INDEX 23
#define EFI_TCG2_FINAL_EVENTS_TABLE_VERSION 1
-#define TPM2_EVENT_LOG_SIZE CONFIG_EFI_TCG2_PROTOCOL_EVENTLOG_SIZE
-
typedef u32 efi_tcg_event_log_bitmap;
typedef u32 efi_tcg_event_log_format;
typedef u32 efi_tcg_event_algorithm_bitmap;
diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig
index ad0bbdd..d4f6b56 100644
--- a/lib/efi_loader/Kconfig
+++ b/lib/efi_loader/Kconfig
@@ -438,15 +438,6 @@
Provide a EFI_TCG2_PROTOCOL implementation using the TPM hardware
of the platform.
-config EFI_TCG2_PROTOCOL_EVENTLOG_SIZE
- int "EFI_TCG2_PROTOCOL EventLog size"
- depends on EFI_TCG2_PROTOCOL
- default 65536
- help
- Define the size of the EventLog for EFI_TCG2_PROTOCOL. Note that
- this is going to be allocated twice. One for the eventlog it self
- and one for the configuration table that is required from the spec
-
config EFI_TCG2_PROTOCOL_MEASURE_DTB
bool "Measure DTB with EFI_TCG2_PROTOCOL"
depends on EFI_TCG2_PROTOCOL
diff --git a/lib/efi_loader/efi_tcg2.c b/lib/efi_loader/efi_tcg2.c
index c697b53..210a846 100644
--- a/lib/efi_loader/efi_tcg2.c
+++ b/lib/efi_loader/efi_tcg2.c
@@ -112,7 +112,7 @@
/* if ExitBootServices hasn't been called update the normal log */
if (!event_log.ebs_called) {
if (event_log.truncated ||
- event_log.pos + event_size > TPM2_EVENT_LOG_SIZE) {
+ event_log.pos + event_size > CONFIG_TPM2_EVENT_LOG_SIZE) {
event_log.truncated = true;
return EFI_VOLUME_FULL;
}
@@ -125,7 +125,7 @@
return ret;
/* if GetEventLog has been called update FinalEventLog as well */
- if (event_log.final_pos + event_size > TPM2_EVENT_LOG_SIZE)
+ if (event_log.final_pos + event_size > CONFIG_TPM2_EVENT_LOG_SIZE)
return EFI_VOLUME_FULL;
log = (void *)((uintptr_t)event_log.final_buffer + event_log.final_pos);
@@ -823,12 +823,12 @@
* EFI_TCG2_GET_EVENT_LOGS need to be stored in an instance of an
* EFI_CONFIGURATION_TABLE
*/
- ret = efi_allocate_pool(EFI_ACPI_MEMORY_NVS, TPM2_EVENT_LOG_SIZE,
+ ret = efi_allocate_pool(EFI_ACPI_MEMORY_NVS, CONFIG_TPM2_EVENT_LOG_SIZE,
&event_log.final_buffer);
if (ret != EFI_SUCCESS)
goto out;
- memset(event_log.final_buffer, 0xff, TPM2_EVENT_LOG_SIZE);
+ memset(event_log.final_buffer, 0xff, CONFIG_TPM2_EVENT_LOG_SIZE);
final_event = event_log.final_buffer;
final_event->number_of_events = 0;
final_event->version = EFI_TCG2_FINAL_EVENTS_TABLE_VERSION;
@@ -914,7 +914,8 @@
if (tcg2_platform_get_tpm2(&dev))
return EFI_DEVICE_ERROR;
- ret = efi_allocate_pool(EFI_BOOT_SERVICES_DATA, TPM2_EVENT_LOG_SIZE,
+ ret = efi_allocate_pool(EFI_BOOT_SERVICES_DATA,
+ CONFIG_TPM2_EVENT_LOG_SIZE,
(void **)&event_log.buffer);
if (ret != EFI_SUCCESS)
return ret;
@@ -923,7 +924,7 @@
* initialize log area as 0xff so the OS can easily figure out the
* last log entry
*/
- memset(event_log.buffer, 0xff, TPM2_EVENT_LOG_SIZE);
+ memset(event_log.buffer, 0xff, CONFIG_TPM2_EVENT_LOG_SIZE);
/*
* The log header is defined to be in SHA1 event log entry format.
@@ -940,7 +941,7 @@
* platforms can use different ways to do so.
*/
elog.log = event_log.buffer;
- elog.log_size = TPM2_EVENT_LOG_SIZE;
+ elog.log_size = CONFIG_TPM2_EVENT_LOG_SIZE;
rc = tcg2_log_prepare_buffer(dev, &elog, false);
if (rc) {
ret = (rc == -ENOBUFS) ? EFI_BUFFER_TOO_SMALL : EFI_DEVICE_ERROR;