projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| a42089dd JF |
2 | /****************************************************************************** |
| 3 | * features.h | |
| 4 | * | |
| 5 | * Feature flags, reported by XENVER_get_features. | |
| 6 | * | |
| 7 | * Copyright (c) 2006, Keir Fraser <keir@xensource.com> | |
| 8 | */ | |
| 9 | ||
| 10 | #ifndef __XEN_PUBLIC_FEATURES_H__ | |
| 11 | #define __XEN_PUBLIC_FEATURES_H__ | |
| 12 | ||
| 13 | /* | |
| 14 | * If set, the guest does not need to write-protect its pagetables, and can | |
| 15 | * update them via direct writes. | |
| 16 | */ | |
| 17 | #define XENFEAT_writable_page_tables 0 | |
| 18 | ||
| 19 | /* | |
| 20 | * If set, the guest does not need to write-protect its segment descriptor | |
| 21 | * tables, and can update them via direct writes. | |
| 22 | */ | |
| 23 | #define XENFEAT_writable_descriptor_tables 1 | |
| 24 | ||
| 25 | /* | |
| 26 | * If set, translation between the guest's 'pseudo-physical' address space | |
| 27 | * and the host's machine address space are handled by the hypervisor. In this | |
| 28 | * mode the guest does not need to perform phys-to/from-machine translations | |
| 29 | * when performing page table operations. | |
| 30 | */ | |
| 31 | #define XENFEAT_auto_translated_physmap 2 | |
| 32 | ||
| 33 | /* If set, the guest is running in supervisor mode (e.g., x86 ring 0). */ | |
| 34 | #define XENFEAT_supervisor_mode_kernel 3 | |
| 35 | ||
| 36 | /* | |
| 37 | * If set, the guest does not need to allocate x86 PAE page directories | |
| 38 | * below 4GB. This flag is usually implied by auto_translated_physmap. | |
| 39 | */ | |
| 40 | #define XENFEAT_pae_pgdir_above_4gb 4 | |
| 41 | ||
| e57778a1 JF |
42 | /* x86: Does this Xen host support the MMU_PT_UPDATE_PRESERVE_AD hypercall? */ |
| 43 | #define XENFEAT_mmu_pt_update_preserve_ad 5 | |
| 44 | ||
| 923b2919 DV |
45 | /* |
| 46 | * If set, GNTTABOP_map_grant_ref honors flags to be placed into guest kernel | |
| 47 | * available pte bits. | |
| 48 | */ | |
| 49 | #define XENFEAT_gnttab_map_avail_bits 7 | |
| 50 | ||
| 38e20b07 SY |
51 | /* x86: Does this Xen host support the HVM callback vector type? */ |
| 52 | #define XENFEAT_hvm_callback_vector 8 | |
| 53 | ||
| 409771d2 SS |
54 | /* x86: pvclock algorithm is safe to use on HVM */ |
| 55 | #define XENFEAT_hvm_safe_pvclock 9 | |
| 56 | ||
| 3942b740 SS |
57 | /* x86: pirq can be used by HVM guests */ |
| 58 | #define XENFEAT_hvm_pirqs 10 | |
| 59 | ||
| ef61ee0d SS |
60 | /* operation as Dom0 is supported */ |
| 61 | #define XENFEAT_dom0 11 | |
| 62 | ||
| a42089dd JF |
63 | #define XENFEAT_NR_SUBMAPS 1 |
| 64 | ||
| 65 | #endif /* __XEN_PUBLIC_FEATURES_H__ */ |