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iommu/vt-d: Parse ANDD records

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Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
David Woodhouse 2014-03-07 14:34:38 +00:00
parent 86a54dcce6
commit e625b4a95d
1 changed files with 27 additions and 0 deletions
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27
drivers/iommu/dmar.c
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@ -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);