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lib/tlcl: Ensure tlcl library is initialized only once

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Since tlcl library is used other than just vboot driver, ensure that the
library is initialized only once per stage.

BUG=chrome-os-partner:59355
BRANCH=None
TEST=Verified in recovery mode on reef, tlcl library is initialized only
once in romstage.

Change-Id: I6245fe9ed34f5c174341b7eea8db456b45113287
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/17364
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
This commit is contained in:
Furquan Shaikh 2016-11-10 09:49:05 -08:00 committed by Martin Roth
parent ffae746c37
commit 8b5d04e1ab
3 changed files with 22 additions and 23 deletions
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21
src/drivers/intel/fsp2_0/memory_init.c
View file

@ -12,7 +12,6 @@
*/
#include <antirollback.h>
#include <arch/early_variables.h>
#include <arch/io.h>
#include <arch/cpu.h>
#include <arch/symbols.h>
@ -34,22 +33,6 @@
#include <vboot/vboot_common.h>
#include <vb2_api.h>
static uint8_t tpm_init_done CAR_GLOBAL;
static int mrc_cache_tpm_init(void)
{
uint8_t done = car_get_var(tpm_init_done);
if (done)
return 0;
if (tlcl_lib_init() != VB2_SUCCESS)
return -1;
car_set_var(tpm_init_done, 1);
return 0;
}
static void mrc_cache_update_tpm_hash(const uint8_t *data, size_t size)
{
uint8_t data_hash[VB2_SHA256_DIGEST_SIZE];
@ -74,7 +57,7 @@ static void mrc_cache_update_tpm_hash(const uint8_t *data, size_t size)
return;
/* Initialize TPM driver. */
if (mrc_cache_tpm_init()) {
if (tlcl_lib_init() != VB2_SUCCESS) {
printk(BIOS_ERR, "MRC: TPM driver initialization failed.\n");
return;
}
@ -206,7 +189,7 @@ static int mrc_cache_verify_tpm_hash(const uint8_t *data, size_t size)
}
/* Initialize TPM driver. */
if (mrc_cache_tpm_init()) {
if (tlcl_lib_init() != VB2_SUCCESS) {
printk(BIOS_ERR, "MRC: TPM driver initialization failed.\n");
return 0;
}

10
src/lib/tlcl.c
View file

@ -14,6 +14,7 @@
* time.
*/
#include <arch/early_variables.h>
#include <assert.h>
#include <string.h>
#include <tpm_lite/tlcl.h>
@ -139,11 +140,20 @@ static uint32_t send(const uint8_t* command) {
/* Exported functions. */
static uint8_t tlcl_init_done CAR_GLOBAL;
uint32_t tlcl_lib_init(void) {
uint8_t done = car_get_var(tlcl_init_done);
if (done)
return VB2_SUCCESS;
if (tis_init())
return VB2_ERROR_UNKNOWN;
if (tis_open())
return VB2_ERROR_UNKNOWN;
car_set_var(tlcl_init_done, 1);
return VB2_SUCCESS;
}

14
src/lib/tpm2_tlcl.c
View file

@ -157,16 +157,22 @@ uint32_t tlcl_get_flags(uint8_t *disable, uint8_t *deactivated,
return TPM_SUCCESS;
}
static uint8_t tlcl_init_done CAR_GLOBAL;
/* This function is called directly by vboot, uses vboot return types. */
uint32_t tlcl_lib_init(void)
{
/*
* This function is called directly by vboot, uses vboot return
* types.
*/
uint8_t done = car_get_var(tlcl_init_done);
if (done)
return VB2_SUCCESS;
if (tis_init())
return VB2_ERROR_UNKNOWN;
if (tis_open())
return VB2_ERROR_UNKNOWN;
car_set_var(tlcl_init_done, 1);
return VB2_SUCCESS;
}