Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 and cross-arch updates from Catalin Marinas:
 "Here's a slightly wider-spread set of updates for 5.9.

  Going outside the usual arch/arm64/ area is the removal of
  read_barrier_depends() series from Will and the MSI/IOMMU ID
  translation series from Lorenzo.

  The notable arm64 updates include ARMv8.4 TLBI range operations and
  translation level hint, time namespace support, and perf.

  Summary:

   - Removal of the tremendously unpopular read_barrier_depends()
     barrier, which is a NOP on all architectures apart from Alpha, in
     favour of allowing architectures to override READ_ONCE() and do
     whatever dance they need to do to ensure address dependencies
     provide LOAD -> LOAD/STORE ordering.

     This work also offers a potential solution if compilers are shown
     to convert LOAD -> LOAD address dependencies into control
     dependencies (e.g. under LTO), as weakly ordered architectures will
     effectively be able to upgrade READ_ONCE() to smp_load_acquire().
     The latter case is not used yet, but will be discussed further at
     LPC.

   - Make the MSI/IOMMU input/output ID translation PCI agnostic,
     augment the MSI/IOMMU ACPI/OF ID mapping APIs to accept an input ID
     bus-specific parameter and apply the resulting changes to the
     device ID space provided by the Freescale FSL bus.

   - arm64 support for TLBI range operations and translation table level
     hints (part of the ARMv8.4 architecture version).

   - Time namespace support for arm64.

   - Export the virtual and physical address sizes in vmcoreinfo for
     makedumpfile and crash utilities.

   - CPU feature handling cleanups and checks for programmer errors
     (overlapping bit-fields).

   - ACPI updates for arm64: disallow AML accesses to EFI code regions
     and kernel memory.

   - perf updates for arm64.

   - Miscellaneous fixes and cleanups, most notably PLT counting
     optimisation for module loading, recordmcount fix to ignore
     relocations other than R_AARCH64_CALL26, CMA areas reserved for
     gigantic pages on 16K and 64K configurations.

   - Trivial typos, duplicate words"

Link: http://lkml.kernel.org/r/20200710165203.31284-1-will@kernel.org
Link: http://lkml.kernel.org/r/20200619082013.13661-1-lorenzo.pieralisi@arm.com

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (82 commits)
  arm64: use IRQ_STACK_SIZE instead of THREAD_SIZE for irq stack
  arm64/mm: save memory access in check_and_switch_context() fast switch path
  arm64: sigcontext.h: delete duplicated word
  arm64: ptrace.h: delete duplicated word
  arm64: pgtable-hwdef.h: delete duplicated words
  bus: fsl-mc: Add ACPI support for fsl-mc
  bus/fsl-mc: Refactor the MSI domain creation in the DPRC driver
  of/irq: Make of_msi_map_rid() PCI bus agnostic
  of/irq: make of_msi_map_get_device_domain() bus agnostic
  dt-bindings: arm: fsl: Add msi-map device-tree binding for fsl-mc bus
  of/device: Add input id to of_dma_configure()
  of/iommu: Make of_map_rid() PCI agnostic
  ACPI/IORT: Add an input ID to acpi_dma_configure()
  ACPI/IORT: Remove useless PCI bus walk
  ACPI/IORT: Make iort_msi_map_rid() PCI agnostic
  ACPI/IORT: Make iort_get_device_domain IRQ domain agnostic
  ACPI/IORT: Make iort_match_node_callback walk the ACPI namespace for NC
  arm64: enable time namespace support
  arm64/vdso: Restrict splitting VVAR VMA
  arm64/vdso: Handle faults on timens page
  ...

2 files changed, 80 insertions, 36 deletions

diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index 28a6b387e80e..ec782e4a0fe4 100644
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -264,15 +264,31 @@ static acpi_status iort_match_node_callback(struct acpi_iort_node *node,
 
 	if (node->type == ACPI_IORT_NODE_NAMED_COMPONENT) {
 		struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
-		struct acpi_device *adev = to_acpi_device_node(dev->fwnode);
+		struct acpi_device *adev;
 		struct acpi_iort_named_component *ncomp;
+		struct device *nc_dev = dev;
+
+		/*
+		 * Walk the device tree to find a device with an
+		 * ACPI companion; there is no point in scanning
+		 * IORT for a device matching a named component if
+		 * the device does not have an ACPI companion to
+		 * start with.
+		 */
+		do {
+			adev = ACPI_COMPANION(nc_dev);
+			if (adev)
+				break;
+
+			nc_dev = nc_dev->parent;
+		} while (nc_dev);
 
 		if (!adev)
 			goto out;
 
 		status = acpi_get_name(adev->handle, ACPI_FULL_PATHNAME, &buf);
 		if (ACPI_FAILURE(status)) {
-			dev_warn(dev, "Can't get device full path name\n");
+			dev_warn(nc_dev, "Can't get device full path name\n");
 			goto out;
 		}
 
@@ -534,7 +550,6 @@ static struct acpi_iort_node *iort_find_dev_node(struct device *dev)
 		node = iort_get_iort_node(dev->fwnode);
 		if (node)
 			return node;
-
 		/*
 		 * if not, then it should be a platform device defined in
 		 * DSDT/SSDT (with Named Component node in IORT)
@@ -543,32 +558,29 @@ static struct acpi_iort_node *iort_find_dev_node(struct device *dev)
 				      iort_match_node_callback, dev);
 	}
 
-	/* Find a PCI root bus */
 	pbus = to_pci_dev(dev)->bus;
-	while (!pci_is_root_bus(pbus))
-		pbus = pbus->parent;
 
 	return iort_scan_node(ACPI_IORT_NODE_PCI_ROOT_COMPLEX,
 			      iort_match_node_callback, &pbus->dev);
 }
 
 /**
- * iort_msi_map_rid() - Map a MSI requester ID for a device
+ * iort_msi_map_id() - Map a MSI input ID for a device
  * @dev: The device for which the mapping is to be done.
- * @req_id: The device requester ID.
+ * @input_id: The device input ID.
  *
- * Returns: mapped MSI RID on success, input requester ID otherwise
+ * Returns: mapped MSI ID on success, input ID otherwise
  */
-u32 iort_msi_map_rid(struct device *dev, u32 req_id)
+u32 iort_msi_map_id(struct device *dev, u32 input_id)
 {
 	struct acpi_iort_node *node;
 	u32 dev_id;
 
 	node = iort_find_dev_node(dev);
 	if (!node)
-		return req_id;
+		return input_id;
 
-	iort_node_map_id(node, req_id, &dev_id, IORT_MSI_TYPE);
+	iort_node_map_id(node, input_id, &dev_id, IORT_MSI_TYPE);
 	return dev_id;
 }
 
@@ -625,13 +637,13 @@ static int __maybe_unused iort_find_its_base(u32 its_id, phys_addr_t *base)
 /**
  * iort_dev_find_its_id() - Find the ITS identifier for a device
  * @dev: The device.
- * @req_id: Device's requester ID
+ * @id: Device's ID
  * @idx: Index of the ITS identifier list.
  * @its_id: ITS identifier.
  *
  * Returns: 0 on success, appropriate error value otherwise
  */
-static int iort_dev_find_its_id(struct device *dev, u32 req_id,
+static int iort_dev_find_its_id(struct device *dev, u32 id,
 				unsigned int idx, int *its_id)
 {
 	struct acpi_iort_its_group *its;
@@ -641,7 +653,7 @@ static int iort_dev_find_its_id(struct device *dev, u32 req_id,
 	if (!node)
 		return -ENXIO;
 
-	node = iort_node_map_id(node, req_id, NULL, IORT_MSI_TYPE);
+	node = iort_node_map_id(node, id, NULL, IORT_MSI_TYPE);
 	if (!node)
 		return -ENXIO;
 
@@ -664,19 +676,20 @@ static int iort_dev_find_its_id(struct device *dev, u32 req_id,
  *
  * Returns: the MSI domain for this device, NULL otherwise
  */
-struct irq_domain *iort_get_device_domain(struct device *dev, u32 req_id)
+struct irq_domain *iort_get_device_domain(struct device *dev, u32 id,
+					  enum irq_domain_bus_token bus_token)
 {
 	struct fwnode_handle *handle;
 	int its_id;
 
-	if (iort_dev_find_its_id(dev, req_id, 0, &its_id))
+	if (iort_dev_find_its_id(dev, id, 0, &its_id))
 		return NULL;
 
 	handle = iort_find_domain_token(its_id);
 	if (!handle)
 		return NULL;
 
-	return irq_find_matching_fwnode(handle, DOMAIN_BUS_PCI_MSI);
+	return irq_find_matching_fwnode(handle, bus_token);
 }
 
 static void iort_set_device_domain(struct device *dev,
@@ -965,19 +978,54 @@ static void iort_named_component_init(struct device *dev,
 					   nc->node_flags);
 }
 
+static int iort_nc_iommu_map(struct device *dev, struct acpi_iort_node *node)
+{
+	struct acpi_iort_node *parent;
+	int err = -ENODEV, i = 0;
+	u32 streamid = 0;
+
+	do {
+
+		parent = iort_node_map_platform_id(node, &streamid,
+						   IORT_IOMMU_TYPE,
+						   i++);
+
+		if (parent)
+			err = iort_iommu_xlate(dev, parent, streamid);
+	} while (parent && !err);
+
+	return err;
+}
+
+static int iort_nc_iommu_map_id(struct device *dev,
+				struct acpi_iort_node *node,
+				const u32 *in_id)
+{
+	struct acpi_iort_node *parent;
+	u32 streamid;
+
+	parent = iort_node_map_id(node, *in_id, &streamid, IORT_IOMMU_TYPE);
+	if (parent)
+		return iort_iommu_xlate(dev, parent, streamid);
+
+	return -ENODEV;
+}
+
+
 /**
- * iort_iommu_configure - Set-up IOMMU configuration for a device.
+ * iort_iommu_configure_id - Set-up IOMMU configuration for a device.
  *
  * @dev: device to configure
+ * @id_in: optional input id const value pointer
  *
  * Returns: iommu_ops pointer on configuration success
  *          NULL on configuration failure
  */
-const struct iommu_ops *iort_iommu_configure(struct device *dev)
+const struct iommu_ops *iort_iommu_configure_id(struct device *dev,
+						const u32 *id_in)
 {
-	struct acpi_iort_node *node, *parent;
+	struct acpi_iort_node *node;
 	const struct iommu_ops *ops;
-	u32 streamid = 0;
 	int err = -ENODEV;
 
 	/*
@@ -1006,21 +1054,13 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
 		if (fwspec && iort_pci_rc_supports_ats(node))
 			fwspec->flags |= IOMMU_FWSPEC_PCI_RC_ATS;
 	} else {
-		int i = 0;
-
 		node = iort_scan_node(ACPI_IORT_NODE_NAMED_COMPONENT,
 				      iort_match_node_callback, dev);
 		if (!node)
 			return NULL;
 
-		do {
-			parent = iort_node_map_platform_id(node, &streamid,
-							   IORT_IOMMU_TYPE,
-							   i++);
-
-			if (parent)
-				err = iort_iommu_xlate(dev, parent, streamid);
-		} while (parent && !err);
+		err = id_in ? iort_nc_iommu_map_id(dev, node, id_in) :
+			      iort_nc_iommu_map(dev, node);
 
 		if (!err)
 			iort_named_component_init(dev, node);
@@ -1045,6 +1085,7 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
 
 	return ops;
 }
+
 #else
 static inline const struct iommu_ops *iort_fwspec_iommu_ops(struct device *dev)
 { return NULL; }
@@ -1053,7 +1094,8 @@ static inline int iort_add_device_replay(const struct iommu_ops *ops,
 { return 0; }
 int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
 { return 0; }
-const struct iommu_ops *iort_iommu_configure(struct device *dev)
+const struct iommu_ops *iort_iommu_configure_id(struct device *dev,
+						const u32 *input_id)
 { return NULL; }
 #endif
 
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 8777faced51a..2142f1554761 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1457,8 +1457,10 @@ int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset,
  * acpi_dma_configure - Set-up DMA configuration for the device.
  * @dev: The pointer to the device
  * @attr: device dma attributes
+ * @input_id: input device id const value pointer
  */
-int acpi_dma_configure(struct device *dev, enum dev_dma_attr attr)
+int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr,
+			  const u32 *input_id)
 {
 	const struct iommu_ops *iommu;
 	u64 dma_addr = 0, size = 0;
@@ -1470,7 +1472,7 @@ int acpi_dma_configure(struct device *dev, enum dev_dma_attr attr)
 
 	iort_dma_setup(dev, &dma_addr, &size);
 
-	iommu = iort_iommu_configure(dev);
+	iommu = iort_iommu_configure_id(dev, input_id);
 	if (PTR_ERR(iommu) == -EPROBE_DEFER)
 		return -EPROBE_DEFER;
 
@@ -1479,7 +1481,7 @@ int acpi_dma_configure(struct device *dev, enum dev_dma_attr attr)
 
 	return 0;
 }
-EXPORT_SYMBOL_GPL(acpi_dma_configure);
+EXPORT_SYMBOL_GPL(acpi_dma_configure_id);
 
 static void acpi_init_coherency(struct acpi_device *adev)
 {