int i;
for (i = 0; efi_guidcmp(table_types[i].guid, NULL_GUID); i++) {
- if (!efi_guidcmp(*guid, table_types[i].guid)) {
- *(table_types[i].ptr) = table;
+ if (efi_guidcmp(*guid, table_types[i].guid))
+ continue;
+
+ if (!efi_config_table_is_usable(guid, table)) {
if (table_types[i].name[0])
- pr_cont("%s=0x%lx ",
+ pr_cont("(%s=0x%lx unusable) ",
table_types[i].name, table);
return 1;
}
+
+ *(table_types[i].ptr) = table;
+ if (table_types[i].name[0])
+ pr_cont("%s=0x%lx ", table_types[i].name, table);
+ return 1;
}
return 0;
return 0;
}
+
+bool __init xen_efi_config_table_is_usable(const efi_guid_t *guid,
+ unsigned long table)
+{
+ efi_memory_desc_t md;
+ int rc;
+
+ if (!efi_enabled(EFI_PARAVIRT))
+ return true;
+
+ rc = efi_mem_desc_lookup(table, &md);
+ if (rc)
+ return false;
+
+ switch (md.type) {
+ case EFI_RUNTIME_SERVICES_CODE:
+ case EFI_RUNTIME_SERVICES_DATA:
+ case EFI_ACPI_RECLAIM_MEMORY:
+ case EFI_ACPI_MEMORY_NVS:
+ case EFI_RESERVED_TYPE:
+ return true;
+ default:
+ return false;
+ }
+}
/* Header of a populated EFI secret area */
#define EFI_SECRET_TABLE_HEADER_GUID EFI_GUID(0x1e74f542, 0x71dd, 0x4d66, 0x96, 0x3e, 0xef, 0x42, 0x87, 0xff, 0x17, 0x3b)
+bool xen_efi_config_table_is_usable(const efi_guid_t *guid, unsigned long table);
+
+static inline
+bool efi_config_table_is_usable(const efi_guid_t *guid, unsigned long table)
+{
+ if (!IS_ENABLED(CONFIG_XEN_EFI))
+ return true;
+ return xen_efi_config_table_is_usable(guid, table);
+}
+
#endif /* _LINUX_EFI_H */