intel-iommu: Decode (and ignore) RHSA entries

I recently got a system where the DMAR table included a couple of RHSA
(remapping hardware static affinity) entries.  Rather than printing a
message about an "Unknown DMAR structure," it would probably be more
useful to dump the RHSA structure (as other DMAR structures are dumped).

Signed-off-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index d199bcabed7..22b02c6df85 100644
--- a/drivers/pci/dmar.c
+++ b/drivers/pci/dmar.c
@@ -354,6 +354,7 @@ dmar_table_print_dmar_entry(struct acpi_dmar_header *header)
         struct acpi_dmar_hardware_unit *drhd;
         struct acpi_dmar_reserved_memory *rmrr;
         struct acpi_dmar_atsr *atsr;
+        struct acpi_dmar_rhsa *rhsa;
 
         switch (header->type) {
         case ACPI_DMAR_TYPE_HARDWARE_UNIT:
@@ -375,6 +376,12 @@ dmar_table_print_dmar_entry(struct acpi_dmar_header *header)
                 atsr = container_of(header, struct acpi_dmar_atsr, header);
                 printk(KERN_INFO PREFIX "ATSR flags: %#x\n", atsr->flags);
                 break;
+        case ACPI_DMAR_HARDWARE_AFFINITY:
+                rhsa = container_of(header, struct acpi_dmar_rhsa, header);
+                printk(KERN_INFO PREFIX "RHSA base: %#016Lx proximity domain: %#x\n",
+                       (unsigned long long)rhsa->base_address,
+                       rhsa->proximity_domain);
+                break;
         }
 }
 
@@ -459,6 +466,9 @@ parse_dmar_table(void)
                         ret = dmar_parse_one_atsr(entry_header);
 #endif
                         break;
+                case ACPI_DMAR_HARDWARE_AFFINITY:
+                        /* We don't do anything with RHSA (yet?) */
+                        break;
                 default:
                         printk(KERN_WARNING PREFIX
                                 "Unknown DMAR structure type %d\n",