[PATCH 1/8] tpm: Export the TPM-version functions

Ilias Apalodimas ilias.apalodimas at linaro.org
Tue Jun 7 10:28:44 CEST 2022


Hi Simon, 

Apologies the late reply.  I wasn't cc'ed on those and missed them in my
mailbox.

On Mon, Feb 28, 2022 at 05:11:18PM -0700, Simon Glass wrote:
> These functions should really be available outside the TPM code, so that
> other callers can find out which version the TPM is. Rename them to have
> a tpm_ prefix() and add them to the header file.
> 
> Signed-off-by: Simon Glass <sjg at chromium.org>
> ---
> 
>  include/tpm_api.h | 10 ++++++
>  lib/tpm_api.c     | 92 +++++++++++++++++++++--------------------------
>  2 files changed, 51 insertions(+), 51 deletions(-)
> 
> diff --git a/include/tpm_api.h b/include/tpm_api.h
> index ef45b43a8f..11aa14eb79 100644
> --- a/include/tpm_api.h
> +++ b/include/tpm_api.h
> @@ -319,4 +319,14 @@ u32 tpm_write_lock(struct udevice *dev, u32 index);
>   */
>  u32 tpm_resume(struct udevice *dev);
>  
> +static inline bool tpm_is_v1(struct udevice *dev)
> +{
> +	return IS_ENABLED(CONFIG_TPM_V1) && tpm_get_version(dev) == TPM_V1;
> +}
> +
> +static inline bool tpm_is_v2(struct udevice *dev)
> +{
> +	return IS_ENABLED(CONFIG_TPM_V2) && tpm_get_version(dev) == TPM_V2;
> +}
> +
>  #endif /* __TPM_API_H */
> diff --git a/lib/tpm_api.c b/lib/tpm_api.c
> index 4c662640a9..4ac4612c81 100644
> --- a/lib/tpm_api.c
> +++ b/lib/tpm_api.c
> @@ -11,21 +11,11 @@
>  #include <tpm-v2.h>
>  #include <tpm_api.h>
>  
> -static bool is_tpm1(struct udevice *dev)
> -{
> -	return IS_ENABLED(CONFIG_TPM_V1) && tpm_get_version(dev) == TPM_V1;
> -}
> -
> -static bool is_tpm2(struct udevice *dev)
> -{
> -	return IS_ENABLED(CONFIG_TPM_V2) && tpm_get_version(dev) == TPM_V2;
> -}
> -
>  u32 tpm_startup(struct udevice *dev, enum tpm_startup_type mode)
>  {
> -	if (is_tpm1(dev)) {
> +	if (tpm_is_v1(dev)) {
>  		return tpm1_startup(dev, mode);
> -	} else if (is_tpm2(dev)) {
> +	} else if (tpm_is_v2(dev)) {
>  		enum tpm2_startup_types type;
>  
>  		switch (mode) {
> @@ -47,9 +37,9 @@ u32 tpm_startup(struct udevice *dev, enum tpm_startup_type mode)
>  
>  u32 tpm_resume(struct udevice *dev)
>  {
> -	if (is_tpm1(dev))
> +	if (tpm_is_v1(dev))
>  		return tpm1_startup(dev, TPM_ST_STATE);
> -	else if (is_tpm2(dev))
> +	else if (tpm_is_v2(dev))
>  		return tpm2_startup(dev, TPM2_SU_STATE);
>  	else
>  		return -ENOSYS;
> @@ -57,9 +47,9 @@ u32 tpm_resume(struct udevice *dev)
>  
>  u32 tpm_self_test_full(struct udevice *dev)
>  {
> -	if (is_tpm1(dev))
> +	if (tpm_is_v1(dev))
>  		return tpm1_self_test_full(dev);
> -	else if (is_tpm2(dev))
> +	else if (tpm_is_v2(dev))
>  		return tpm2_self_test(dev, TPMI_YES);
>  	else
>  		return -ENOSYS;
> @@ -67,9 +57,9 @@ u32 tpm_self_test_full(struct udevice *dev)
>  
>  u32 tpm_continue_self_test(struct udevice *dev)
>  {
> -	if (is_tpm1(dev))
> +	if (tpm_is_v1(dev))
>  		return tpm1_continue_self_test(dev);
> -	else if (is_tpm2(dev))
> +	else if (tpm_is_v2(dev))
>  		return tpm2_self_test(dev, TPMI_NO);
>  	else
>  		return -ENOSYS;
> @@ -86,7 +76,7 @@ u32 tpm_clear_and_reenable(struct udevice *dev)
>  		return ret;
>  	}
>  
> -	if (is_tpm1(dev)) {
> +	if (tpm_is_v1(dev)) {
>  		ret = tpm1_physical_enable(dev);
>  		if (ret != TPM_SUCCESS) {
>  			log_err("TPM: Can't set enabled state\n");
> @@ -105,9 +95,9 @@ u32 tpm_clear_and_reenable(struct udevice *dev)
>  
>  u32 tpm_nv_enable_locking(struct udevice *dev)
>  {
> -	if (is_tpm1(dev))
> +	if (tpm_is_v1(dev))
>  		return tpm1_nv_define_space(dev, TPM_NV_INDEX_LOCK, 0, 0);
> -	else if (is_tpm2(dev))
> +	else if (tpm_is_v2(dev))
>  		return -ENOSYS;
>  	else
>  		return -ENOSYS;
> @@ -115,9 +105,9 @@ u32 tpm_nv_enable_locking(struct udevice *dev)
>  
>  u32 tpm_nv_read_value(struct udevice *dev, u32 index, void *data, u32 count)
>  {
> -	if (is_tpm1(dev))
> +	if (tpm_is_v1(dev))
>  		return tpm1_nv_read_value(dev, index, data, count);
> -	else if (is_tpm2(dev))
> +	else if (tpm_is_v2(dev))
>  		return tpm2_nv_read_value(dev, index, data, count);
>  	else
>  		return -ENOSYS;
> @@ -126,9 +116,9 @@ u32 tpm_nv_read_value(struct udevice *dev, u32 index, void *data, u32 count)
>  u32 tpm_nv_write_value(struct udevice *dev, u32 index, const void *data,
>  		       u32 count)
>  {
> -	if (is_tpm1(dev))
> +	if (tpm_is_v1(dev))
>  		return tpm1_nv_write_value(dev, index, data, count);
> -	else if (is_tpm2(dev))
> +	else if (tpm_is_v2(dev))
>  		return tpm2_nv_write_value(dev, index, data, count);
>  	else
>  		return -ENOSYS;
> @@ -141,9 +131,9 @@ u32 tpm_set_global_lock(struct udevice *dev)
>  
>  u32 tpm_write_lock(struct udevice *dev, u32 index)
>  {
> -	if (is_tpm1(dev))
> +	if (tpm_is_v1(dev))
>  		return -ENOSYS;
> -	else if (is_tpm2(dev))
> +	else if (tpm_is_v2(dev))
>  		return tpm2_write_lock(dev, index);
>  	else
>  		return -ENOSYS;
> @@ -152,9 +142,9 @@ u32 tpm_write_lock(struct udevice *dev, u32 index)
>  u32 tpm_pcr_extend(struct udevice *dev, u32 index, const void *in_digest,
>  		   void *out_digest)
>  {
> -	if (is_tpm1(dev))
> +	if (tpm_is_v1(dev))
>  		return tpm1_extend(dev, index, in_digest, out_digest);
> -	else if (is_tpm2(dev))
> +	else if (tpm_is_v2(dev))
>  		return tpm2_pcr_extend(dev, index, TPM2_ALG_SHA256, in_digest,
>  				       TPM2_DIGEST_LEN);
>  	else
> @@ -163,9 +153,9 @@ u32 tpm_pcr_extend(struct udevice *dev, u32 index, const void *in_digest,
>  
>  u32 tpm_pcr_read(struct udevice *dev, u32 index, void *data, size_t count)
>  {
> -	if (is_tpm1(dev))
> +	if (tpm_is_v1(dev))
>  		return tpm1_pcr_read(dev, index, data, count);
> -	else if (is_tpm2(dev))
> +	else if (tpm_is_v2(dev))
>  		return -ENOSYS;
>  	else
>  		return -ENOSYS;
> @@ -173,14 +163,14 @@ u32 tpm_pcr_read(struct udevice *dev, u32 index, void *data, size_t count)
>  
>  u32 tpm_tsc_physical_presence(struct udevice *dev, u16 presence)
>  {
> -	if (is_tpm1(dev))
> +	if (tpm_is_v1(dev))
>  		return tpm1_tsc_physical_presence(dev, presence);
>  
>  	/*
>  	 * Nothing to do on TPM2 for this; use platform hierarchy availability
>  	 * instead.
>  	 */
> -	else if (is_tpm2(dev))
> +	else if (tpm_is_v2(dev))
>  		return 0;
>  	else
>  		return -ENOSYS;
> @@ -188,11 +178,11 @@ u32 tpm_tsc_physical_presence(struct udevice *dev, u16 presence)
>  
>  u32 tpm_finalise_physical_presence(struct udevice *dev)
>  {
> -	if (is_tpm1(dev))
> +	if (tpm_is_v1(dev))
>  		return tpm1_finalise_physical_presence(dev);
>  
>  	/* Nothing needs to be done with tpm2 */
> -	else if (is_tpm2(dev))
> +	else if (tpm_is_v2(dev))
>  		return 0;
>  	else
>  		return -ENOSYS;
> @@ -200,9 +190,9 @@ u32 tpm_finalise_physical_presence(struct udevice *dev)
>  
>  u32 tpm_read_pubek(struct udevice *dev, void *data, size_t count)
>  {
> -	if (is_tpm1(dev))
> +	if (tpm_is_v1(dev))
>  		return tpm1_read_pubek(dev, data, count);
> -	else if (is_tpm2(dev))
> +	else if (tpm_is_v2(dev))
>  		return -ENOSYS; /* not implemented yet */
>  	else
>  		return -ENOSYS;
> @@ -210,9 +200,9 @@ u32 tpm_read_pubek(struct udevice *dev, void *data, size_t count)
>  
>  u32 tpm_force_clear(struct udevice *dev)
>  {
> -	if (is_tpm1(dev))
> +	if (tpm_is_v1(dev))
>  		return tpm1_force_clear(dev);
> -	else if (is_tpm2(dev))
> +	else if (tpm_is_v2(dev))
>  		return tpm2_clear(dev, TPM2_RH_PLATFORM, NULL, 0);
>  	else
>  		return -ENOSYS;
> @@ -220,11 +210,11 @@ u32 tpm_force_clear(struct udevice *dev)
>  
>  u32 tpm_physical_enable(struct udevice *dev)
>  {
> -	if (is_tpm1(dev))
> +	if (tpm_is_v1(dev))
>  		return tpm1_physical_enable(dev);
>  
>  	/* Nothing needs to be done with tpm2 */
> -	else if (is_tpm2(dev))
> +	else if (tpm_is_v2(dev))
>  		return 0;
>  	else
>  		return -ENOSYS;
> @@ -232,11 +222,11 @@ u32 tpm_physical_enable(struct udevice *dev)
>  
>  u32 tpm_physical_disable(struct udevice *dev)
>  {
> -	if (is_tpm1(dev))
> +	if (tpm_is_v1(dev))
>  		return tpm1_physical_disable(dev);
>  
>  	/* Nothing needs to be done with tpm2 */
> -	else if (is_tpm2(dev))
> +	else if (tpm_is_v2(dev))
>  		return 0;
>  	else
>  		return -ENOSYS;
> @@ -244,10 +234,10 @@ u32 tpm_physical_disable(struct udevice *dev)
>  
>  u32 tpm_physical_set_deactivated(struct udevice *dev, u8 state)
>  {
> -	if (is_tpm1(dev))
> +	if (tpm_is_v1(dev))
>  		return tpm1_physical_set_deactivated(dev, state);
>  	/* Nothing needs to be done with tpm2 */
> -	else if (is_tpm2(dev))
> +	else if (tpm_is_v2(dev))
>  		return 0;
>  	else
>  		return -ENOSYS;
> @@ -256,9 +246,9 @@ u32 tpm_physical_set_deactivated(struct udevice *dev, u8 state)
>  u32 tpm_get_capability(struct udevice *dev, u32 cap_area, u32 sub_cap,
>  		       void *cap, size_t count)
>  {
> -	if (is_tpm1(dev))
> +	if (tpm_is_v1(dev))
>  		return tpm1_get_capability(dev, cap_area, sub_cap, cap, count);
> -	else if (is_tpm2(dev))
> +	else if (tpm_is_v2(dev))
>  		return tpm2_get_capability(dev, cap_area, sub_cap, cap, count);
>  	else
>  		return -ENOSYS;
> @@ -266,9 +256,9 @@ u32 tpm_get_capability(struct udevice *dev, u32 cap_area, u32 sub_cap,
>  
>  u32 tpm_get_permissions(struct udevice *dev, u32 index, u32 *perm)
>  {
> -	if (is_tpm1(dev))
> +	if (tpm_is_v1(dev))
>  		return tpm1_get_permissions(dev, index, perm);
> -	else if (is_tpm2(dev))
> +	else if (tpm_is_v2(dev))
>  		return -ENOSYS; /* not implemented yet */
>  	else
>  		return -ENOSYS;
> @@ -276,9 +266,9 @@ u32 tpm_get_permissions(struct udevice *dev, u32 index, u32 *perm)
>  
>  u32 tpm_get_random(struct udevice *dev, void *data, u32 count)
>  {
> -	if (is_tpm1(dev))
> +	if (tpm_is_v1(dev))
>  		return tpm1_get_random(dev, data, count);
> -	else if (is_tpm2(dev))
> +	else if (tpm_is_v2(dev))
>  		return -ENOSYS; /* not implemented yet */
>  	else
>  		return -ENOSYS;
> -- 
> 2.35.1.574.g5d30c73bfb-goog
> 

Reviewed-by: Ilias Apalodimas <ilias.apalodimas at linaro.org>



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