return 0;
}
EXPORT_SYMBOL(psp_tee_process_cmd);
+
+int psp_check_tee_status(void)
+{
+ struct psp_device *psp = psp_get_master_device();
+
+ if (!psp || !psp->tee_data)
+ return -ENODEV;
+
+ return 0;
+}
+EXPORT_SYMBOL(psp_check_tee_status);
#include <linux/firmware.h>
#include "amdtee_private.h"
#include "../tee_private.h"
+#include <linux/psp-tee.h>
static struct amdtee_driver_data *drv_data;
static DEFINE_MUTEX(session_list_mutex);
struct tee_shm_pool *pool = ERR_PTR(-EINVAL);
int rc;
+ rc = psp_check_tee_status();
+ if (rc)
+ goto err_fail;
+
drv_data = kzalloc(sizeof(*drv_data), GFP_KERNEL);
if (IS_ERR(drv_data))
return -ENOMEM;
kfree(drv_data);
drv_data = NULL;
+err_fail:
pr_err("amd-tee driver initialization failed\n");
return rc;
}
int psp_tee_process_cmd(enum tee_cmd_id cmd_id, void *buf, size_t len,
u32 *status);
+/**
+ * psp_check_tee_status() - Checks whether there is a TEE which a driver can
+ * talk to.
+ *
+ * This function can be used by AMD-TEE driver to query if there is TEE with
+ * which it can communicate.
+ *
+ * Returns:
+ * 0 if the device has TEE
+ * -%ENODEV if there is no TEE available
+ */
+int psp_check_tee_status(void);
+
#else /* !CONFIG_CRYPTO_DEV_SP_PSP */
static inline int psp_tee_process_cmd(enum tee_cmd_id cmd_id, void *buf,
{
return -ENODEV;
}
+
+static inline int psp_check_tee_status(void)
+{
+ return -ENODEV;
+}
#endif /* CONFIG_CRYPTO_DEV_SP_PSP */
#endif /* __PSP_TEE_H_ */