267 lines
8.4 KiB
C
267 lines
8.4 KiB
C
/******************************************************************************
|
|
* memory.h
|
|
*
|
|
* Memory reservation and information.
|
|
*
|
|
* Copyright (c) 2005, Keir Fraser <keir@xensource.com>
|
|
*/
|
|
|
|
#ifndef __XEN_PUBLIC_MEMORY_H__
|
|
#define __XEN_PUBLIC_MEMORY_H__
|
|
|
|
#include <linux/spinlock.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(xen_pfn_t) extent_start;
|
|
|
|
/* Number of extents, and size/alignment of each (2^extent_order pages). */
|
|
xen_ulong_t 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);
|
|
|
|
/*
|
|
* An atomic exchange of memory pages. If return code is zero then
|
|
* @out.extent_list provides GMFNs of the newly-allocated memory.
|
|
* Returns zero on complete success, otherwise a negative error code.
|
|
* On complete success then always @nr_exchanged == @in.nr_extents.
|
|
* On partial success @nr_exchanged indicates how much work was done.
|
|
*/
|
|
#define XENMEM_exchange 11
|
|
struct xen_memory_exchange {
|
|
/*
|
|
* [IN] Details of memory extents to be exchanged (GMFN bases).
|
|
* Note that @in.address_bits is ignored and unused.
|
|
*/
|
|
struct xen_memory_reservation in;
|
|
|
|
/*
|
|
* [IN/OUT] Details of new memory extents.
|
|
* We require that:
|
|
* 1. @in.domid == @out.domid
|
|
* 2. @in.nr_extents << @in.extent_order ==
|
|
* @out.nr_extents << @out.extent_order
|
|
* 3. @in.extent_start and @out.extent_start lists must not overlap
|
|
* 4. @out.extent_start lists GPFN bases to be populated
|
|
* 5. @out.extent_start is overwritten with allocated GMFN bases
|
|
*/
|
|
struct xen_memory_reservation out;
|
|
|
|
/*
|
|
* [OUT] Number of input extents that were successfully exchanged:
|
|
* 1. The first @nr_exchanged input extents were successfully
|
|
* deallocated.
|
|
* 2. The corresponding first entries in the output extent list correctly
|
|
* indicate the GMFNs that were successfully exchanged.
|
|
* 3. All other input and output extents are untouched.
|
|
* 4. If not all input exents are exchanged then the return code of this
|
|
* command will be non-zero.
|
|
* 5. THIS FIELD MUST BE INITIALISED TO ZERO BY THE CALLER!
|
|
*/
|
|
xen_ulong_t nr_exchanged;
|
|
};
|
|
|
|
DEFINE_GUEST_HANDLE_STRUCT(xen_memory_exchange);
|
|
/*
|
|
* 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(xen_pfn_t) 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);
|
|
|
|
/*
|
|
* Returns the location in virtual address space of the machine_to_phys
|
|
* mapping table. Architectures which do not have a m2p table, or which do not
|
|
* map it by default into guest address space, do not implement this command.
|
|
* arg == addr of xen_machphys_mapping_t.
|
|
*/
|
|
#define XENMEM_machphys_mapping 12
|
|
struct xen_machphys_mapping {
|
|
xen_ulong_t v_start, v_end; /* Start and end virtual addresses. */
|
|
xen_ulong_t max_mfn; /* Maximum MFN that can be looked up. */
|
|
};
|
|
DEFINE_GUEST_HANDLE_STRUCT(xen_machphys_mapping_t);
|
|
|
|
#define XENMAPSPACE_shared_info 0 /* shared info page */
|
|
#define XENMAPSPACE_grant_table 1 /* grant table page */
|
|
#define XENMAPSPACE_gmfn 2 /* GMFN */
|
|
#define XENMAPSPACE_gmfn_range 3 /* GMFN range, XENMEM_add_to_physmap only. */
|
|
#define XENMAPSPACE_gmfn_foreign 4 /* GMFN from another dom,
|
|
* XENMEM_add_to_physmap_range only.
|
|
*/
|
|
|
|
/*
|
|
* 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;
|
|
|
|
/* Number of pages to go through for gmfn_range */
|
|
uint16_t size;
|
|
|
|
/* Source mapping space. */
|
|
unsigned int space;
|
|
|
|
/* Index into source mapping space. */
|
|
xen_ulong_t idx;
|
|
|
|
/* GPFN where the source mapping page should appear. */
|
|
xen_pfn_t gpfn;
|
|
};
|
|
DEFINE_GUEST_HANDLE_STRUCT(xen_add_to_physmap);
|
|
|
|
/*** REMOVED ***/
|
|
/*#define XENMEM_translate_gpfn_list 8*/
|
|
|
|
#define XENMEM_add_to_physmap_range 23
|
|
struct xen_add_to_physmap_range {
|
|
/* IN */
|
|
/* Which domain to change the mapping for. */
|
|
domid_t domid;
|
|
uint16_t space; /* => enum phys_map_space */
|
|
|
|
/* Number of pages to go through */
|
|
uint16_t size;
|
|
domid_t foreign_domid; /* IFF gmfn_foreign */
|
|
|
|
/* Indexes into space being mapped. */
|
|
GUEST_HANDLE(xen_ulong_t) idxs;
|
|
|
|
/* GPFN in domid where the source mapping page should appear. */
|
|
GUEST_HANDLE(xen_pfn_t) gpfns;
|
|
|
|
/* OUT */
|
|
|
|
/* Per index error code. */
|
|
GUEST_HANDLE(int) errs;
|
|
};
|
|
DEFINE_GUEST_HANDLE_STRUCT(xen_add_to_physmap_range);
|
|
|
|
/*
|
|
* Returns the pseudo-physical memory map as it was when the domain
|
|
* was started (specified by XENMEM_set_memory_map).
|
|
* arg == addr of struct xen_memory_map.
|
|
*/
|
|
#define XENMEM_memory_map 9
|
|
struct xen_memory_map {
|
|
/*
|
|
* On call the number of entries which can be stored in buffer. On
|
|
* return the number of entries which have been stored in
|
|
* buffer.
|
|
*/
|
|
unsigned int nr_entries;
|
|
|
|
/*
|
|
* Entries in the buffer are in the same format as returned by the
|
|
* BIOS INT 0x15 EAX=0xE820 call.
|
|
*/
|
|
GUEST_HANDLE(void) buffer;
|
|
};
|
|
DEFINE_GUEST_HANDLE_STRUCT(xen_memory_map);
|
|
|
|
/*
|
|
* Returns the real physical memory map. Passes the same structure as
|
|
* XENMEM_memory_map.
|
|
* arg == addr of struct xen_memory_map.
|
|
*/
|
|
#define XENMEM_machine_memory_map 10
|
|
|
|
|
|
/*
|
|
* Prevent the balloon driver from changing the memory reservation
|
|
* during a driver critical region.
|
|
*/
|
|
extern spinlock_t xen_reservation_lock;
|
|
|
|
/*
|
|
* Unmaps the page appearing at a particular GPFN from the specified guest's
|
|
* pseudophysical address space.
|
|
* arg == addr of xen_remove_from_physmap_t.
|
|
*/
|
|
#define XENMEM_remove_from_physmap 15
|
|
struct xen_remove_from_physmap {
|
|
/* Which domain to change the mapping for. */
|
|
domid_t domid;
|
|
|
|
/* GPFN of the current mapping of the page. */
|
|
xen_pfn_t gpfn;
|
|
};
|
|
DEFINE_GUEST_HANDLE_STRUCT(xen_remove_from_physmap);
|
|
|
|
#endif /* __XEN_PUBLIC_MEMORY_H__ */
|