iort: Clean up compiling errors/warnings for sva

hulk inclusion
category: bugfix
bugzilla: 16081
CVE: NA
-------------------

1. use CONFIG_IOMMU_SVA macro to isolate iommu-sva related code in iort.
2. move struct page_response_msg,enum page_response_code and
iopf_queue_flush_t out of macro CONFIG_IOMMU_API, since these are always
used by iommu api.

Fixes: 676917d8930e ("iommu/sva: Track mm changes with an MMU notifier")
Fixes: 615753b31ae4 ("ACPI/IORT: Check ATS capability in root complex nodes")
Fixes: e741c308b09f ("iort: Read ACPI configure to get streamid.")
Signed-off-by: NZhou Guanghui <zhouguanghui1@huawei.com>
Reviewed-by: NYang Yingliang <yangyingliang@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

drivers/acpi/arm64/iort.c

@@ -1030,6 +1030,7 @@ void iort_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size)
 	dev_dbg(dev, "dma_pfn_offset(%#08llx)\n", offset);
 }
 
+#ifdef CONFIG_IOMMU_SVA
 static bool iort_pci_rc_supports_ats(struct acpi_iort_node *node)
 {
 	struct acpi_iort_root_complex *pci_rc;
@@ -1037,6 +1038,7 @@ static bool iort_pci_rc_supports_ats(struct acpi_iort_node *node)
 	pci_rc = (struct acpi_iort_root_complex *)node->node_data;
 	return pci_rc->ats_attribute & ACPI_IORT_ATS_SUPPORTED;
 }
+#endif
 
 /**
  * iort_iommu_configure - Set-up IOMMU configuration for a device.
@@ -1073,9 +1075,10 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
 		info.node = node;
 		err = pci_for_each_dma_alias(to_pci_dev(dev),
 					     iort_pci_iommu_init, &info);
-
+#ifdef CONFIG_IOMMU_SVA
 		if (!err && !iort_pci_rc_supports_ats(node))
 			dev->iommu_fwspec->flags |= IOMMU_FWSPEC_PCI_NO_ATS;
+#endif
 	} else {
 		int i = 0;
 
@@ -1085,7 +1088,9 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
 			return NULL;
 
 		do {
+#ifdef CONFIG_IOMMU_SVA
 			u32 sid;
+#endif
 			parent = iort_node_map_platform_id(node, &streamid,
 							   IORT_IOMMU_TYPE,
 							   i++);
@@ -1093,6 +1098,7 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
 			if (parent)
 				err = iort_iommu_xlate(dev, parent, streamid);
 
+#ifdef CONFIG_IOMMU_SVA
 			if (!acpi_dev_prop_read_single(ACPI_COMPANION(dev),
 					"streamid", DEV_PROP_U32, &sid)) {
 				err = iommu_fwspec_add_ids(dev, &sid, 1);
@@ -1101,6 +1107,7 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
 				dev->iommu_fwspec->can_stall = true;
 				dev->iommu_fwspec->num_pasid_bits = 0x10;
 			}
+#endif
 
 		} while (parent && !err);
 	}

include/linux/iommu.h

@@ -184,8 +184,6 @@ struct iommu_resv_region {
 	enum iommu_resv_type	type;
 };
 
-#ifdef CONFIG_IOMMU_API
-
 /**
  * enum page_response_code - Return status of fault handlers, telling the IOMMU
  * driver how to proceed with the fault.
@@ -203,19 +201,6 @@ enum page_response_code {
 	IOMMU_PAGE_RESP_FAILURE,
 };
 
-/**
- * enum page_request_handle_t - Return page request/response handler status
- *
- * @IOMMU_FAULT_STATUS_HANDLED: Stop processing the fault, and do not send a
- *	reply to the device.
- * @IOMMU_FAULT_STATUS_CONTINUE: Fault was not handled. Call the next handler,
- *	or terminate.
- */
-enum page_request_handle_t {
-	IOMMU_PAGE_RESP_HANDLED = 0,
-	IOMMU_PAGE_RESP_CONTINUE,
-};
-
 /**
  * Generic page response information based on PCI ATS and PASID spec.
  * @addr: servicing page address
@@ -235,6 +220,29 @@ struct page_response_msg {
 	u64 private_data;
 };
 
+/**
+ * iopf_queue_flush_t - Flush low-level page fault queue
+ *
+ * Report all faults currently pending in the low-level page fault queue
+ */
+struct iopf_queue;
+typedef int (*iopf_queue_flush_t)(void *cookie, struct device *dev);
+
+#ifdef CONFIG_IOMMU_API
+
+/**
+ * enum page_request_handle_t - Return page request/response handler status
+ *
+ * @IOMMU_FAULT_STATUS_HANDLED: Stop processing the fault, and do not send a
+ *	reply to the device.
+ * @IOMMU_FAULT_STATUS_CONTINUE: Fault was not handled. Call the next handler,
+ *	or terminate.
+ */
+enum page_request_handle_t {
+	IOMMU_PAGE_RESP_HANDLED = 0,
+	IOMMU_PAGE_RESP_CONTINUE,
+};
+
 struct iommu_sva_param {
 	unsigned long features;
 	unsigned int min_pasid;
@@ -459,14 +467,6 @@ struct iommu_fault_param {
 	void *data;
 };
 
-/**
- * iopf_queue_flush_t - Flush low-level page fault queue
- *
- * Report all faults currently pending in the low-level page fault queue
- */
-struct iopf_queue;
-typedef int (*iopf_queue_flush_t)(void *cookie, struct device *dev);
-
 /**
  * struct iommu_param - collection of per-device IOMMU data
  *