diff options
Diffstat (limited to 'include/xen/interface/features.h')
| -rw-r--r-- | include/xen/interface/features.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/xen/interface/features.h b/include/xen/interface/features.h index 6d1384abfbdf..5a7bdefa06a8 100644 --- a/include/xen/interface/features.h +++ b/include/xen/interface/features.h @@ -83,6 +83,20 @@ */ #define XENFEAT_linux_rsdp_unrestricted 15 +/* + * A direct-mapped (or 1:1 mapped) domain is a domain for which its + * local pages have gfn == mfn. If a domain is direct-mapped, + * XENFEAT_direct_mapped is set; otherwise XENFEAT_not_direct_mapped + * is set. + * + * If neither flag is set (e.g. older Xen releases) the assumptions are: + * - not auto_translated domains (x86 only) are always direct-mapped + * - on x86, auto_translated domains are not direct-mapped + * - on ARM, Dom0 is direct-mapped, DomUs are not + */ +#define XENFEAT_not_direct_mapped 16 +#define XENFEAT_direct_mapped 17 + #define XENFEAT_NR_SUBMAPS 1 #endif /* __XEN_PUBLIC_FEATURES_H__ */ |