intel-iommu: Set a more specific taint flag for invalid BIOS DMAR tables

We now know how to deal with these tables so that they are harmless.
Set TAINT_FIRMWARE_WORKAROUND instead of the default TAINT_WARN.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 16 insertions, 12 deletions

diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index 1959cdadad51..f4c51709d132 100644
--- a/drivers/pci/dmar.c
+++ b/drivers/pci/dmar.c
@@ -360,12 +360,14 @@ dmar_parse_one_rhsa(struct acpi_dmar_header *header)
                         return 0;
                 }
         }
-        WARN(1, "Your BIOS is broken; RHSA refers to non-existent DMAR unit at %llx\n"
-             "BIOS vendor: %s; Ver: %s; Product Version: %s\n",
-             drhd->reg_base_addr,
-             dmi_get_system_info(DMI_BIOS_VENDOR),
-             dmi_get_system_info(DMI_BIOS_VERSION),
-             dmi_get_system_info(DMI_PRODUCT_VERSION));
+        WARN_TAINT(
+                1, TAINT_FIRMWARE_WORKAROUND,
+                "Your BIOS is broken; RHSA refers to non-existent DMAR unit at %llx\n"
+                "BIOS vendor: %s; Ver: %s; Product Version: %s\n",
+                drhd->reg_base_addr,
+                dmi_get_system_info(DMI_BIOS_VENDOR),
+                dmi_get_system_info(DMI_BIOS_VERSION),
+                dmi_get_system_info(DMI_PRODUCT_VERSION));
 
         return 0;
 }
@@ -620,12 +622,14 @@ int __init dmar_table_init(void)
 
 static void warn_invalid_dmar(u64 addr, const char *message)
 {
-        WARN_ONCE(1, "Your BIOS is broken; DMAR reported at address %llx%s!\n"
-                  "BIOS vendor: %s; Ver: %s; Product Version: %s\n",
-                  addr, message,
-                  dmi_get_system_info(DMI_BIOS_VENDOR),
-                  dmi_get_system_info(DMI_BIOS_VERSION),
-                  dmi_get_system_info(DMI_PRODUCT_VERSION));
+        WARN_TAINT_ONCE(
+                1, TAINT_FIRMWARE_WORKAROUND,
+                "Your BIOS is broken; DMAR reported at address %llx%s!\n"
+                "BIOS vendor: %s; Ver: %s; Product Version: %s\n",
+                addr, message,
+                dmi_get_system_info(DMI_BIOS_VENDOR),
+                dmi_get_system_info(DMI_BIOS_VERSION),
+                dmi_get_system_info(DMI_PRODUCT_VERSION));
 }
 
 int __init check_zero_address(void)