ACPI / blacklist: add acpi_match_platform_list()

ACPI OEM ID / OEM Table ID / Revision can be used to identify
a platform based on ACPI firmware info.  acpi_blacklisted(),
intel_pstate_platform_pwr_mgmt_exists(), and some other funcs,
have been using similar check to detect a list of platforms
that require special handlings.

Move the platform check in acpi_blacklisted() to a new common
utility function, acpi_match_platform_list(), so that other
drivers do not have to implement their own version.

There is no change in functionality.

Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Reviewed-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 27b4b6615263..1c8a97d8b09b 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -556,6 +556,25 @@ extern acpi_status acpi_pci_osc_control_set(acpi_handle handle,
 #define ACPI_OST_SC_DRIVER_LOAD_FAILURE         0x81
 #define ACPI_OST_SC_INSERT_NOT_SUPPORTED        0x82
 
+enum acpi_predicate {
+        all_versions,
+        less_than_or_equal,
+        equal,
+        greater_than_or_equal,
+};
+
+/* Table must be terminted by a NULL entry */
+struct acpi_platform_list {
+        char    oem_id[ACPI_OEM_ID_SIZE+1];
+        char    oem_table_id[ACPI_OEM_TABLE_ID_SIZE+1];
+        u32     oem_revision;
+        char    *table;
+        enum acpi_predicate pred;
+        char    *reason;
+        u32     data;
+};
+int acpi_match_platform_list(const struct acpi_platform_list *plat);
+
 extern void acpi_early_init(void);
 extern void acpi_subsystem_init(void);