diff options
Diffstat (limited to 'source/include/actbl.h')
| -rw-r--r-- | source/include/actbl.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/source/include/actbl.h b/source/include/actbl.h index ea522cf9be9a..b72c3bfb303c 100644 --- a/source/include/actbl.h +++ b/source/include/actbl.h @@ -517,12 +517,27 @@ typedef struct acpi_table_desc } ACPI_TABLE_DESC; +/* + * Maximum value of the ValidationCount field in ACPI_TABLE_DESC. + * When reached, ValidationCount cannot be changed any more and the table will + * be permanently regarded as validated. + * + * This is to prevent situations in which unbalanced table get/put operations + * may cause premature table unmapping in the OS to happen. + * + * The maximum validation count can be defined to any value, but should be + * greater than the maximum number of OS early stage mapping slots to avoid + * leaking early stage table mappings to the late stage. + */ +#define ACPI_MAX_TABLE_VALIDATIONS ACPI_UINT16_MAX + /* Masks for Flags field above */ #define ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL (0) /* Virtual address, external maintained */ #define ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL (1) /* Physical address, internally mapped */ #define ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL (2) /* Virtual address, internallly allocated */ #define ACPI_TABLE_ORIGIN_MASK (3) +#define ACPI_TABLE_IS_VERIFIED (4) #define ACPI_TABLE_IS_LOADED (8) |