iommu/vt-d: Parse ANDD records (e625b4a9) · Commits · e / devices / android_kernel_xiaomi_markw

drivers/iommu/dmar.c

+27 −0

Original line number	Diff line number	Diff line
		@@ -373,6 +373,26 @@ static void dmar_free_drhd(struct dmar_drhd_unit *dmaru)
		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 @@ dmar_table_print_dmar_entry(struct acpi_dmar_header *header)
		(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 @@ parse_dmar_table(void)
		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);