You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
145 lines
4.5 KiB
145 lines
4.5 KiB
/******************************************************************************
|
|
* memory.h
|
|
*
|
|
* Memory reservation and information.
|
|
*
|
|
* Copyright (c) 2005, Keir Fraser <keir@xensource.com>
|
|
*/
|
|
|
|
#ifndef __XEN_PUBLIC_MEMORY_H__
|
|
#define __XEN_PUBLIC_MEMORY_H__
|
|
|
|
/*
|
|
* Increase or decrease the specified domain's memory reservation. Returns a
|
|
* -ve errcode on failure, or the # extents successfully allocated or freed.
|
|
* arg == addr of struct xen_memory_reservation.
|
|
*/
|
|
#define XENMEM_increase_reservation 0
|
|
#define XENMEM_decrease_reservation 1
|
|
#define XENMEM_populate_physmap 6
|
|
struct xen_memory_reservation {
|
|
|
|
/*
|
|
* XENMEM_increase_reservation:
|
|
* OUT: MFN (*not* GMFN) bases of extents that were allocated
|
|
* XENMEM_decrease_reservation:
|
|
* IN: GMFN bases of extents to free
|
|
* XENMEM_populate_physmap:
|
|
* IN: GPFN bases of extents to populate with memory
|
|
* OUT: GMFN bases of extents that were allocated
|
|
* (NB. This command also updates the mach_to_phys translation table)
|
|
*/
|
|
GUEST_HANDLE(ulong) extent_start;
|
|
|
|
/* Number of extents, and size/alignment of each (2^extent_order pages). */
|
|
unsigned long nr_extents;
|
|
unsigned int extent_order;
|
|
|
|
/*
|
|
* Maximum # bits addressable by the user of the allocated region (e.g.,
|
|
* I/O devices often have a 32-bit limitation even in 64-bit systems). If
|
|
* zero then the user has no addressing restriction.
|
|
* This field is not used by XENMEM_decrease_reservation.
|
|
*/
|
|
unsigned int address_bits;
|
|
|
|
/*
|
|
* Domain whose reservation is being changed.
|
|
* Unprivileged domains can specify only DOMID_SELF.
|
|
*/
|
|
domid_t domid;
|
|
|
|
};
|
|
DEFINE_GUEST_HANDLE_STRUCT(xen_memory_reservation);
|
|
|
|
/*
|
|
* Returns the maximum machine frame number of mapped RAM in this system.
|
|
* This command always succeeds (it never returns an error code).
|
|
* arg == NULL.
|
|
*/
|
|
#define XENMEM_maximum_ram_page 2
|
|
|
|
/*
|
|
* Returns the current or maximum memory reservation, in pages, of the
|
|
* specified domain (may be DOMID_SELF). Returns -ve errcode on failure.
|
|
* arg == addr of domid_t.
|
|
*/
|
|
#define XENMEM_current_reservation 3
|
|
#define XENMEM_maximum_reservation 4
|
|
|
|
/*
|
|
* Returns a list of MFN bases of 2MB extents comprising the machine_to_phys
|
|
* mapping table. Architectures which do not have a m2p table do not implement
|
|
* this command.
|
|
* arg == addr of xen_machphys_mfn_list_t.
|
|
*/
|
|
#define XENMEM_machphys_mfn_list 5
|
|
struct xen_machphys_mfn_list {
|
|
/*
|
|
* Size of the 'extent_start' array. Fewer entries will be filled if the
|
|
* machphys table is smaller than max_extents * 2MB.
|
|
*/
|
|
unsigned int max_extents;
|
|
|
|
/*
|
|
* Pointer to buffer to fill with list of extent starts. If there are
|
|
* any large discontiguities in the machine address space, 2MB gaps in
|
|
* the machphys table will be represented by an MFN base of zero.
|
|
*/
|
|
GUEST_HANDLE(ulong) extent_start;
|
|
|
|
/*
|
|
* Number of extents written to the above array. This will be smaller
|
|
* than 'max_extents' if the machphys table is smaller than max_e * 2MB.
|
|
*/
|
|
unsigned int nr_extents;
|
|
};
|
|
DEFINE_GUEST_HANDLE_STRUCT(xen_machphys_mfn_list);
|
|
|
|
/*
|
|
* Sets the GPFN at which a particular page appears in the specified guest's
|
|
* pseudophysical address space.
|
|
* arg == addr of xen_add_to_physmap_t.
|
|
*/
|
|
#define XENMEM_add_to_physmap 7
|
|
struct xen_add_to_physmap {
|
|
/* Which domain to change the mapping for. */
|
|
domid_t domid;
|
|
|
|
/* Source mapping space. */
|
|
#define XENMAPSPACE_shared_info 0 /* shared info page */
|
|
#define XENMAPSPACE_grant_table 1 /* grant table page */
|
|
unsigned int space;
|
|
|
|
/* Index into source mapping space. */
|
|
unsigned long idx;
|
|
|
|
/* GPFN where the source mapping page should appear. */
|
|
unsigned long gpfn;
|
|
};
|
|
DEFINE_GUEST_HANDLE_STRUCT(xen_add_to_physmap);
|
|
|
|
/*
|
|
* Translates a list of domain-specific GPFNs into MFNs. Returns a -ve error
|
|
* code on failure. This call only works for auto-translated guests.
|
|
*/
|
|
#define XENMEM_translate_gpfn_list 8
|
|
struct xen_translate_gpfn_list {
|
|
/* Which domain to translate for? */
|
|
domid_t domid;
|
|
|
|
/* Length of list. */
|
|
unsigned long nr_gpfns;
|
|
|
|
/* List of GPFNs to translate. */
|
|
GUEST_HANDLE(ulong) gpfn_list;
|
|
|
|
/*
|
|
* Output list to contain MFN translations. May be the same as the input
|
|
* list (in which case each input GPFN is overwritten with the output MFN).
|
|
*/
|
|
GUEST_HANDLE(ulong) mfn_list;
|
|
};
|
|
DEFINE_GUEST_HANDLE_STRUCT(xen_translate_gpfn_list);
|
|
|
|
#endif /* __XEN_PUBLIC_MEMORY_H__ */
|
|
|