[cut]
> +static struct optee *optee_probe(struct device_node *np)
> +{
> + optee_invoke_fn *invoke_fn;
> + struct tee_shm_pool *pool;
> + struct optee *optee = NULL;
> + void *memremaped_shm = NULL;
> + struct tee_device *teedev;
> + u32 sec_caps;
> + int rc;
> +
> + invoke_fn = get_invoke_func(np);
> + if (IS_ERR(invoke_fn))
> + return (void *)invoke_fn;
> +
> + if (!optee_msg_api_uid_is_optee_api(invoke_fn)) {
> + pr_warn("api uid mismatch\n");
> + return ERR_PTR(-EINVAL);
> + }
> +
> + if (!optee_msg_api_revision_is_compatible(invoke_fn)) {
> + pr_warn("api revision mismatch\n");
> + return ERR_PTR(-EINVAL);
> + }
> +
> + if (!optee_msg_exchange_capabilities(invoke_fn, &sec_caps)) {
> + pr_warn("capabilities mismatch\n");
> + return ERR_PTR(-EINVAL);
> + }
> +
> + /*
> + * We have no other option for shared memory, if secure world
> + * doesn't have any reserved memory we can use we can't continue.
> + */
> + if (!(sec_caps & OPTEE_SMC_SEC_CAP_HAVE_RESERVERED_SHM))
> + return ERR_PTR(-EINVAL);
Typo? RESERVERED_SHM should be RESERVED_SHM
> diff --git a/drivers/tee/optee/optee_smc.h b/drivers/tee/optee/optee_smc.h
> +/*
> + * Exchanges capabilities between normal world and secure world
> + *
> + * Call register usage:
> + * a0 SMC Function ID, OPTEE_SMC_EXCHANGE_CAPABILITIES
> + * a1 bitfield of normal world capabilities OPTEE_SMC_NSEC_CAP_*
> + * a2-6 Not used
> + * a7 Hypervisor Client ID register
> + *
> + * Normal return register usage:
> + * a0 OPTEE_SMC_RETURN_OK
> + * a1 bitfield of secure world capabilities OPTEE_SMC_SEC_CAP_*
> + * a2-7 Preserved
> + *
> + * Error return register usage:
> + * a0 OPTEE_SMC_RETURN_ENOTAVAIL, can't use the capabilities from normal world
> + * a1 bitfield of secure world capabilities OPTEE_SMC_SEC_CAP_*
> + * a2-7 Preserved
> + */
> +/* Normal world works as a uniprocessor system */
> +#define OPTEE_SMC_NSEC_CAP_UNIPROCESSOR BIT(0)
> +/* Secure world has reserved shared memory for normal world to use */
> +#define OPTEE_SMC_SEC_CAP_HAVE_RESERVERED_SHM BIT(0)
Same typo? s/RESERVERED_SHM/RESERVED_SHM/
Thanks,
Stuart
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