iommu/vt-d: Parse ANDD records
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index b19f9f4..eb95020 100644
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -373,6 +373,26 @@
kfree(dmaru);
}
+static int __init dmar_parse_one_andd(struct acpi_dmar_header *header)
+{
+ struct acpi_dmar_andd *andd = (void *)header;
+
+ /* Check for NUL termination within the designated length */
+ if (strnlen(andd->object_name, header->length - 8) == header->length - 8) {
+ WARN_TAINT(1, TAINT_FIRMWARE_WORKAROUND,
+ "Your BIOS is broken; ANDD object name is not NUL-terminated\n"
+ "BIOS vendor: %s; Ver: %s; Product Version: %s\n",
+ dmi_get_system_info(DMI_BIOS_VENDOR),
+ dmi_get_system_info(DMI_BIOS_VERSION),
+ dmi_get_system_info(DMI_PRODUCT_VERSION));
+ return -EINVAL;
+ }
+ pr_info("ANDD device: %x name: %s\n", andd->device_number,
+ andd->object_name);
+
+ return 0;
+}
+
#ifdef CONFIG_ACPI_NUMA
static int __init
dmar_parse_one_rhsa(struct acpi_dmar_header *header)
@@ -436,6 +456,10 @@
(unsigned long long)rhsa->base_address,
rhsa->proximity_domain);
break;
+ case ACPI_DMAR_TYPE_ANDD:
+ /* We don't print this here because we need to sanity-check
+ it first. So print it in dmar_parse_one_andd() instead. */
+ break;
}
}
@@ -521,6 +545,9 @@
ret = dmar_parse_one_rhsa(entry_header);
#endif
break;
+ case ACPI_DMAR_TYPE_ANDD:
+ ret = dmar_parse_one_andd(entry_header);
+ break;
default:
pr_warn("Unknown DMAR structure type %d\n",
entry_header->type);