xen/interface/features.h

1 /* SPDX-License-Identifier: MIT */
16  * The list of all the features the guest supports. They are set by
24  * XENFEAT_dom0 MUST be set if the guest is to be booted as dom0,
28  * If set, the guest does not need to write-protect its pagetables, and can
34  * If set, the guest does not need to write-protect its segment descriptor
40  * If set, translation between the guest's 'pseudo-physical' address space
42  * mode the guest does not need to perform phys-to/from-machine translations
47 /* If set, the guest is running in supervisor mode (e.g., x86 ring 0). */
51  * If set, the guest does not need to allocate x86 PAE page directories
63  * If set, GNTTABOP_map_grant_ref honors flags to be placed into guest kernel
92  * x86/PVH: If set, ACPI RSDP can be placed at any address. Otherwise RSDP
93  * must be located in lower 1MB, as required by ACPI Specification for IA-PC
101  * A direct-mapped (or 1:1 mapped) domain is a domain for which its
102  * local pages have gfn == mfn. If a domain is direct-mapped,
103  * XENFEAT_direct_mapped is set; otherwise XENFEAT_not_direct_mapped
104  * is set.
106  * If neither flag is set (e.g. older Xen releases) the assumptions are:
107  * - not auto_translated domains (x86 only) are always direct-mapped
108  * - on x86, auto_translated domains are not direct-mapped
109  * - on ARM, Dom0 is direct-mapped, DomUs are not
121  * c-file-style: "BSD"
122  * c-basic-offset: 4
123  * tab-width: 4
124  * indent-tabs-mode: nil