/**
* tee_ta_verify_param() - check that the 4 "params" match security
*/
TEE_Result tee_ta_verify_param(struct tee_ta_session *sess,
struct tee_ta_param *param)
{
tee_paddr_t p;
size_t l;
int n;
for (n = 0; n < TEE_NUM_PARAMS; n++) {
switch (TEE_PARAM_TYPE_GET(param->types, n)) {
case TEE_PARAM_TYPE_MEMREF_OUTPUT:
case TEE_PARAM_TYPE_MEMREF_INOUT:
case TEE_PARAM_TYPE_MEMREF_INPUT:
if (param->param_attr[n] & TEE_MATTR_VIRTUAL) {
p = virt_to_phys(
param->params[n].memref.buffer);
if (!p)
return TEE_ERROR_SECURITY;
} else {
p = (tee_paddr_t)param->params[n].memref.buffer;
}
l = param->params[n].memref.size;
if (core_pbuf_is(CORE_MEM_NSEC_SHM, p, l))
break;
if ((sess->ctx->flags & TA_FLAG_UNSAFE_NW_PARAMS) &&
core_pbuf_is(CORE_MEM_MULTPURPOSE, p, l))
break;
if ((sess->clnt_id.login == TEE_LOGIN_TRUSTED_APP) &&
core_pbuf_is(CORE_MEM_TA_RAM, p, l))
break;
return TEE_ERROR_SECURITY;
default:
break;
}
}
return TEE_SUCCESS;
}
/* test attributes of target virtual buffer (in core mapping) */
bool core_vbuf_is(uint32_t attr, const void *vbuf, size_t len)
{
uint32_t p;
/* Empty buffers complies with anything */
if (len == 0)
return true;
if (core_va2pa((void *)vbuf, &p))
return false;
return core_pbuf_is(attr, (tee_paddr_t)p, len);
}
/* test attributes of target virtual buffer (in core mapping) */
bool core_vbuf_is(uint32_t attr, const void *vbuf, size_t len)
{
paddr_t p;
/* Empty buffers complies with anything */
if (len == 0)
return true;
p = virt_to_phys((void *)vbuf);
if (!p)
return false;
return core_pbuf_is(attr, p, len);
}
TEE_Result tee_set_l2cc_mutex(paddr_t *mutex)
{
uint32_t addr;
void *va;
if (l2cc_mutex_va != NULL)
return TEE_ERROR_BAD_PARAMETERS;
addr = *mutex;
if (core_pbuf_is(CORE_MEM_NSEC_SHM, addr, MUTEX_SZ) == false)
return TEE_ERROR_BAD_PARAMETERS;
va = phys_to_virt(addr, MEM_AREA_NSEC_SHM);
if (!va)
return TEE_ERROR_BAD_PARAMETERS;
l2cc_mutex_pa = addr;
l2cc_mutex_va = va;
return TEE_SUCCESS;
}
