diff options
Diffstat (limited to 'include/xen/interface/memory.h')
| -rw-r--r-- | include/xen/interface/memory.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/include/xen/interface/memory.h b/include/xen/interface/memory.h index 583dd93b3016..4c5751c26f87 100644 --- a/include/xen/interface/memory.h +++ b/include/xen/interface/memory.h @@ -265,4 +265,70 @@ struct xen_remove_from_physmap { }; DEFINE_GUEST_HANDLE_STRUCT(xen_remove_from_physmap); +/* + * Get the pages for a particular guest resource, so that they can be + * mapped directly by a tools domain. + */ +#define XENMEM_acquire_resource 28 +struct xen_mem_acquire_resource { + /* IN - The domain whose resource is to be mapped */ + domid_t domid; + /* IN - the type of resource */ + uint16_t type; + +#define XENMEM_resource_ioreq_server 0 +#define XENMEM_resource_grant_table 1 + + /* + * IN - a type-specific resource identifier, which must be zero + * unless stated otherwise. + * + * type == XENMEM_resource_ioreq_server -> id == ioreq server id + * type == XENMEM_resource_grant_table -> id defined below + */ + uint32_t id; + +#define XENMEM_resource_grant_table_id_shared 0 +#define XENMEM_resource_grant_table_id_status 1 + + /* IN/OUT - As an IN parameter number of frames of the resource + * to be mapped. However, if the specified value is 0 and + * frame_list is NULL then this field will be set to the + * maximum value supported by the implementation on return. + */ + uint32_t nr_frames; + /* + * OUT - Must be zero on entry. On return this may contain a bitwise + * OR of the following values. + */ + uint32_t flags; + + /* The resource pages have been assigned to the calling domain */ +#define _XENMEM_rsrc_acq_caller_owned 0 +#define XENMEM_rsrc_acq_caller_owned (1u << _XENMEM_rsrc_acq_caller_owned) + + /* + * IN - the index of the initial frame to be mapped. This parameter + * is ignored if nr_frames is 0. + */ + uint64_t frame; + +#define XENMEM_resource_ioreq_server_frame_bufioreq 0 +#define XENMEM_resource_ioreq_server_frame_ioreq(n) (1 + (n)) + + /* + * IN/OUT - If the tools domain is PV then, upon return, frame_list + * will be populated with the MFNs of the resource. + * If the tools domain is HVM then it is expected that, on + * entry, frame_list will be populated with a list of GFNs + * that will be mapped to the MFNs of the resource. + * If -EIO is returned then the frame_list has only been + * partially mapped and it is up to the caller to unmap all + * the GFNs. + * This parameter may be NULL if nr_frames is 0. + */ + GUEST_HANDLE(xen_pfn_t) frame_list; +}; +DEFINE_GUEST_HANDLE_STRUCT(xen_mem_acquire_resource); + #endif /* __XEN_PUBLIC_MEMORY_H__ */ |