return 0;
}
+/*******************************************************************************
+ * Returns a unique token for a Secure Service request.
+ ******************************************************************************/
+static uint32_t spci_create_token_value(void)
+{
+ /*
+ * Trivial implementation that relies on the fact that any response will
+ * be read before 2^32 more service requests have been done.
+ */
+ static uint32_t token_count;
+
+ return token_count++;
+}
+
/*******************************************************************************
* This function looks for a Secure Partition that has a Secure Service
* identified by the given UUID. It returns a handle that the client can use to
SMC_RET4(handle, SPCI_SUCCESS, rx1, rx2, rx3);
}
+/*******************************************************************************
+ * This function requests a Secure Service from a given handle and client ID.
+ ******************************************************************************/
+static uint64_t spci_service_request_start(void *handle,
+ uint32_t smc_fid, u_register_t x1, u_register_t x2,
+ u_register_t x3, u_register_t x4, u_register_t x5,
+ u_register_t x6, u_register_t x7)
+{
+ spci_handle_t *handle_info;
+ sp_context_t *sp_ctx;
+ cpu_context_t *cpu_ctx;
+ uint16_t request_handle, client_id;
+ uint32_t token;
+
+ /* Get handle array lock */
+ spin_lock(&spci_handles_lock);
+
+ /* Get pointer to struct of this open handle and client ID. */
+ request_handle = (x7 >> 16U) & 0x0000FFFFU;
+ client_id = x7 & 0x0000FFFFU;
+
+ handle_info = spci_handle_info_get(request_handle, client_id);
+ if (handle_info == NULL) {
+ spin_unlock(&spci_handles_lock);
+
+ WARN("SPCI_SERVICE_TUN_REQUEST_START: Not found.\n"
+ " Handle 0x%04x. Client ID 0x%04x\n", request_handle,
+ client_id);
+
+ SMC_RET1(handle, SPCI_INVALID_PARAMETER);
+ }
+
+ /* Get pointer to the Secure Partition that handles the service */
+ sp_ctx = handle_info->sp_ctx;
+ assert(sp_ctx != NULL);
+ cpu_ctx = &(sp_ctx->cpu_ctx);
+
+ /* Prevent this handle from being closed */
+ handle_info->num_active_requests += 1;
+
+ spm_sp_request_increase(sp_ctx);
+
+ /* Create new token for this request */
+ token = spci_create_token_value();
+
+ /* Release handle lock */
+ spin_unlock(&spci_handles_lock);
+
+ /* Pass arguments to the Secure Partition */
+ struct sprt_queue_entry_message message = {
+ .type = SPRT_MSG_TYPE_SERVICE_TUN_REQUEST,
+ .client_id = client_id,
+ .service_handle = request_handle,
+ .session_id = x6,
+ .token = token,
+ .args = {smc_fid, x1, x2, x3, x4, x5}
+ };
+
+ spin_lock(&(sp_ctx->spm_sp_buffer_lock));
+ int rc = sprt_push_message((void *)sp_ctx->spm_sp_buffer_base, &message,
+ SPRT_QUEUE_NUM_NON_BLOCKING);
+ spin_unlock(&(sp_ctx->spm_sp_buffer_lock));
+ if (rc != 0) {
+ WARN("SPCI_SERVICE_TUN_REQUEST_START: SPRT queue full.\n"
+ " Handle 0x%04x. Client ID 0x%04x\n", request_handle,
+ client_id);
+ SMC_RET1(handle, SPCI_NO_MEMORY);
+ }
+
+ /* Try to enter the partition. If it's not possible, simply return. */
+ if (sp_state_try_switch(sp_ctx, SP_STATE_IDLE, SP_STATE_BUSY) != 0) {
+ SMC_RET2(handle, SPCI_SUCCESS, token);
+ }
+
+ /* Save the Normal world context */
+ cm_el1_sysregs_context_save(NON_SECURE);
+
+ /* Jump to the Secure Partition. */
+ uint64_t ret = spm_sp_synchronous_entry(sp_ctx);
+
+ /* Verify returned values */
+ if (ret == SPRT_PUT_RESPONSE_AARCH64) {
+ uint32_t token;
+ uint64_t rx1, rx2, rx3, x6;
+
+ token = read_ctx_reg(get_gpregs_ctx(cpu_ctx), CTX_GPREG_X1);
+ rx1 = read_ctx_reg(get_gpregs_ctx(cpu_ctx), CTX_GPREG_X3);
+ rx2 = read_ctx_reg(get_gpregs_ctx(cpu_ctx), CTX_GPREG_X4);
+ rx3 = read_ctx_reg(get_gpregs_ctx(cpu_ctx), CTX_GPREG_X5);
+ x6 = read_ctx_reg(get_gpregs_ctx(cpu_ctx), CTX_GPREG_X6);
+
+ uint16_t client_id = x6 & 0xFFFFU;
+ uint16_t service_handle = x6 >> 16;
+
+ int rc = spm_response_add(client_id, service_handle, token,
+ rx1, rx2, rx3);
+ if (rc != 0) {
+ /*
+ * This is error fatal because we can't return to the SP
+ * from this SMC. The SP has crashed.
+ */
+ panic();
+ }
+ } else if (ret != SPRT_YIELD_AARCH64) {
+ ERROR("SPM: %s: Unexpected x0 value 0x%llx\n", __func__, ret);
+ panic();
+ }
+
+ /* Flag Secure Partition as idle. */
+ assert(sp_ctx->state == SP_STATE_BUSY);
+ sp_state_set(sp_ctx, SP_STATE_IDLE);
+
+ /* Restore non-secure state */
+ cm_el1_sysregs_context_restore(NON_SECURE);
+ cm_set_next_eret_context(NON_SECURE);
+
+ SMC_RET2(handle, SPCI_SUCCESS, token);
+}
+
+/*******************************************************************************
+ * This function returns the response of a Secure Service given a handle, a
+ * client ID and a token. If not available, it will schedule a Secure Partition
+ * and give it CPU time.
+ ******************************************************************************/
+static uint64_t spci_service_request_resume(void *handle, u_register_t x1,
+ u_register_t x7)
+{
+ int rc;
+ u_register_t rx1 = 0, rx2 = 0, rx3 = 0;
+ spci_handle_t *handle_info;
+ sp_context_t *sp_ctx;
+ cpu_context_t *cpu_ctx;
+ uint32_t token = (uint32_t) x1;
+ uint16_t client_id = x7 & 0x0000FFFF;
+ uint16_t service_handle = (x7 >> 16) & 0x0000FFFF;
+
+ /* Get pointer to struct of this open handle and client ID. */
+ spin_lock(&spci_handles_lock);
+
+ handle_info = spci_handle_info_get(service_handle, client_id);
+ if (handle_info == NULL) {
+ spin_unlock(&spci_handles_lock);
+ WARN("SPCI_SERVICE_REQUEST_RESUME: Not found.\n"
+ "Handle 0x%04x. Client ID 0x%04x, Token 0x%08x.\n",
+ client_id, service_handle, token);
+
+ SMC_RET1(handle, SPCI_INVALID_PARAMETER);
+ }
+
+ /* Get pointer to the Secure Partition that handles the service */
+ sp_ctx = handle_info->sp_ctx;
+ assert(sp_ctx != NULL);
+ cpu_ctx = &(sp_ctx->cpu_ctx);
+
+ spin_unlock(&spci_handles_lock);
+
+ /* Look for a valid response in the global queue */
+ rc = spm_response_get(client_id, service_handle, token,
+ &rx1, &rx2, &rx3);
+ if (rc == 0) {
+ /* Decrease request count */
+ spin_lock(&spci_handles_lock);
+ handle_info->num_active_requests -= 1;
+ spin_unlock(&spci_handles_lock);
+ spm_sp_request_decrease(sp_ctx);
+
+ SMC_RET4(handle, SPCI_SUCCESS, rx1, rx2, rx3);
+ }
+
+ /* Try to enter the partition. If it's not possible, simply return. */
+ if (sp_state_try_switch(sp_ctx, SP_STATE_IDLE, SP_STATE_BUSY) != 0) {
+ SMC_RET1(handle, SPCI_QUEUED);
+ }
+
+ /* Save the Normal world context */
+ cm_el1_sysregs_context_save(NON_SECURE);
+
+ /* Jump to the Secure Partition. */
+ uint64_t ret = spm_sp_synchronous_entry(sp_ctx);
+
+ /* Verify returned values */
+ if (ret == SPRT_PUT_RESPONSE_AARCH64) {
+ uint32_t token;
+ uint64_t rx1, rx2, rx3, x6;
+
+ token = read_ctx_reg(get_gpregs_ctx(cpu_ctx), CTX_GPREG_X1);
+ rx1 = read_ctx_reg(get_gpregs_ctx(cpu_ctx), CTX_GPREG_X3);
+ rx2 = read_ctx_reg(get_gpregs_ctx(cpu_ctx), CTX_GPREG_X4);
+ rx3 = read_ctx_reg(get_gpregs_ctx(cpu_ctx), CTX_GPREG_X5);
+ x6 = read_ctx_reg(get_gpregs_ctx(cpu_ctx), CTX_GPREG_X6);
+
+ uint16_t client_id = x6 & 0xFFFFU;
+ uint16_t service_handle = x6 >> 16;
+
+ int rc = spm_response_add(client_id, service_handle, token,
+ rx1, rx2, rx3);
+ if (rc != 0) {
+ /*
+ * This is error fatal because we can't return to the SP
+ * from this SMC. The SP has crashed.
+ */
+ panic();
+ }
+ } else if (ret != SPRT_YIELD_AARCH64) {
+ ERROR("SPM: %s: Unexpected x0 value 0x%llx\n", __func__, ret);
+ panic();
+ }
+
+ /* Flag Secure Partition as idle. */
+ assert(sp_ctx->state == SP_STATE_BUSY);
+ sp_state_set(sp_ctx, SP_STATE_IDLE);
+
+ /* Restore non-secure state */
+ cm_el1_sysregs_context_restore(NON_SECURE);
+ cm_set_next_eret_context(NON_SECURE);
+
+ /* Look for a valid response in the global queue */
+ rc = spm_response_get(client_id, service_handle, token,
+ &rx1, &rx2, &rx3);
+ if (rc != 0) {
+ SMC_RET1(handle, SPCI_QUEUED);
+ }
+
+ /* Decrease request count */
+ spin_lock(&spci_handles_lock);
+ handle_info->num_active_requests -= 1;
+ spin_unlock(&spci_handles_lock);
+ spm_sp_request_decrease(sp_ctx);
+
+ /* Return response */
+ SMC_RET4(handle, SPCI_SUCCESS, rx1, rx2, rx3);
+}
+
+/*******************************************************************************
+ * This function returns the response of a Secure Service given a handle, a
+ * client ID and a token.
+ ******************************************************************************/
+static uint64_t spci_service_get_response(void *handle, u_register_t x1,
+ u_register_t x7)
+
+{
+ int rc;
+ u_register_t rx1 = 0, rx2 = 0, rx3 = 0;
+ spci_handle_t *handle_info;
+ uint32_t token = (uint32_t) x1;
+ uint16_t client_id = x7 & 0x0000FFFF;
+ uint16_t service_handle = (x7 >> 16) & 0x0000FFFF;
+
+ /* Get pointer to struct of this open handle and client ID. */
+
+ spin_lock(&spci_handles_lock);
+
+ handle_info = spci_handle_info_get(service_handle, client_id);
+ if (handle_info == NULL) {
+ spin_unlock(&spci_handles_lock);
+ WARN("SPCI_SERVICE_GET_RESPONSE: Not found.\n"
+ "Handle 0x%04x. Client ID 0x%04x, Token 0x%08x.\n",
+ client_id, service_handle, token);
+
+ SMC_RET1(handle, SPCI_INVALID_PARAMETER);
+ }
+
+ spin_unlock(&spci_handles_lock);
+
+ /* Look for a valid response in the global queue */
+ rc = spm_response_get(client_id, service_handle, token,
+ &rx1, &rx2, &rx3);
+
+ if (rc != 0) {
+ SMC_RET1(handle, SPCI_QUEUED);
+ }
+
+ /* Decrease request count */
+ spin_lock(&spci_handles_lock);
+ handle_info->num_active_requests -= 1;
+ sp_context_t *sp_ctx;
+ sp_ctx = handle_info->sp_ctx;
+ spin_unlock(&spci_handles_lock);
+ spm_sp_request_decrease(sp_ctx);
+
+ /* Return response */
+ SMC_RET4(handle, SPCI_SUCCESS, rx1, rx2, rx3);
+}
+
/*******************************************************************************
* This function handles all SMCs in the range reserved for SPCI.
******************************************************************************/
smc_fid, x1, x2, x3, x4, x5, x6, x7);
}
+ case SPCI_FID_SERVICE_REQUEST_START:
+ {
+ uint64_t x5 = SMC_GET_GP(handle, CTX_GPREG_X5);
+ uint64_t x6 = SMC_GET_GP(handle, CTX_GPREG_X6);
+ uint64_t x7 = SMC_GET_GP(handle, CTX_GPREG_X7);
+
+ return spci_service_request_start(handle,
+ smc_fid, x1, x2, x3, x4, x5, x6, x7);
+ }
+
+ case SPCI_FID_SERVICE_GET_RESPONSE:
+ {
+ uint64_t x7 = SMC_GET_GP(handle, CTX_GPREG_X7);
+
+ return spci_service_get_response(handle, x1, x7);
+ }
+
default:
break;
}
/* Tunneled calls */
+ spci_fid = (smc_fid >> SPCI_FID_TUN_SHIFT) & SPCI_FID_TUN_MASK;
+
+ switch (spci_fid) {
+
+ case SPCI_FID_SERVICE_REQUEST_RESUME:
+ {
+ uint64_t x7 = SMC_GET_GP(handle, CTX_GPREG_X7);
+
+ return spci_service_request_resume(handle, x1, x7);
+ }
+
+ default:
+ break;
+ }
}
WARN("SPCI: Unsupported call 0x%08x\n", smc_fid);
projects / project / bcm63xx / atf.git / commitdiff