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

Pull arm64 fixes from Catalin Marinas:

 - Bring initialisation of user space undefined instruction handling
   early (core_initcall) since late_initcall() happens after modprobe in
   initramfs is invoked. Similar fix for fpsimd initialisation

 - Increase the kernel stack when KASAN is enabled

 - Bring the PCI ACS enabling earlier via the
   iort_init_platform_devices()

 - Fix misleading data abort address printing (decimal vs hex)

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: Ensure fpsimd support is ready before userspace is active
  arm64: Ensure the instruction emulation is ready for userspace
  arm64: Use larger stacks when KASAN is selected
  ACPI/IORT: Fix PCI ACS enablement
  arm64: fix misleading data abort decoding

1 files changed, 35 insertions, 0 deletions

diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index 9565d572f8dd..de56394dd161 100644
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -1178,12 +1178,44 @@ dev_put:
         return ret;
 }
 
+static bool __init iort_enable_acs(struct acpi_iort_node *iort_node)
+{
+        if (iort_node->type == ACPI_IORT_NODE_PCI_ROOT_COMPLEX) {
+                struct acpi_iort_node *parent;
+                struct acpi_iort_id_mapping *map;
+                int i;
+
+                map = ACPI_ADD_PTR(struct acpi_iort_id_mapping, iort_node,
+                                   iort_node->mapping_offset);
+
+                for (i = 0; i < iort_node->mapping_count; i++, map++) {
+                        if (!map->output_reference)
+                                continue;
+
+                        parent = ACPI_ADD_PTR(struct acpi_iort_node,
+                                        iort_table,  map->output_reference);
+                        /*
+                         * If we detect a RC->SMMU mapping, make sure
+                         * we enable ACS on the system.
+                         */
+                        if ((parent->type == ACPI_IORT_NODE_SMMU) ||
+                                (parent->type == ACPI_IORT_NODE_SMMU_V3)) {
+                                pci_request_acs();
+                                return true;
+                        }
+                }
+        }
+
+        return false;
+}
+
 static void __init iort_init_platform_devices(void)
 {
         struct acpi_iort_node *iort_node, *iort_end;
         struct acpi_table_iort *iort;
         struct fwnode_handle *fwnode;
         int i, ret;
+        bool acs_enabled = false;
 
         /*
          * iort_table and iort both point to the start of IORT table, but
@@ -1203,6 +1235,9 @@ static void __init iort_init_platform_devices(void)
                         return;
                 }
 
+                if (!acs_enabled)
+                        acs_enabled = iort_enable_acs(iort_node);
+
                 if ((iort_node->type == ACPI_IORT_NODE_SMMU) ||
                         (iort_node->type == ACPI_IORT_NODE_SMMU_V3)) {