623 lines
20 KiB
C
623 lines
20 KiB
C
/******************************************************************************
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* memory.h
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*
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* Memory reservation and information.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Copyright (c) 2005, Keir Fraser <keir@xensource.com>
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*/
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#ifndef __XEN_PUBLIC_MEMORY_H__
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#define __XEN_PUBLIC_MEMORY_H__
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#include "xen.h"
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#include "physdev.h"
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/*
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* Increase or decrease the specified domain's memory reservation. Returns the
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* number of extents successfully allocated or freed.
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* arg == addr of struct xen_memory_reservation.
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*/
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#define XENMEM_increase_reservation 0
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#define XENMEM_decrease_reservation 1
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#define XENMEM_populate_physmap 6
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#if __XEN_INTERFACE_VERSION__ >= 0x00030209
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/*
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* Maximum # bits addressable by the user of the allocated region (e.g., I/O
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* devices often have a 32-bit limitation even in 64-bit systems). If zero
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* then the user has no addressing restriction. This field is not used by
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* XENMEM_decrease_reservation.
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*/
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#define XENMEMF_address_bits(x) (x)
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#define XENMEMF_get_address_bits(x) ((x) & 0xffu)
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/* NUMA node to allocate from. */
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#define XENMEMF_node(x) (((x) + 1) << 8)
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#define XENMEMF_get_node(x) ((((x) >> 8) - 1) & 0xffu)
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/* Flag to populate physmap with populate-on-demand entries */
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#define XENMEMF_populate_on_demand (1<<16)
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/* Flag to request allocation only from the node specified */
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#define XENMEMF_exact_node_request (1<<17)
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#define XENMEMF_exact_node(n) (XENMEMF_node(n) | XENMEMF_exact_node_request)
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/* Flag to indicate the node specified is virtual node */
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#define XENMEMF_vnode (1<<18)
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#endif
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struct xen_memory_reservation {
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/*
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* XENMEM_increase_reservation:
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* OUT: MFN (*not* GMFN) bases of extents that were allocated
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* XENMEM_decrease_reservation:
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* IN: GMFN bases of extents to free
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* XENMEM_populate_physmap:
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* IN: GPFN bases of extents to populate with memory
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* OUT: GMFN bases of extents that were allocated
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* (NB. This command also updates the mach_to_phys translation table)
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* XENMEM_claim_pages:
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* IN: must be zero
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*/
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XEN_GUEST_HANDLE(xen_pfn_t) extent_start;
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/* Number of extents, and size/alignment of each (2^extent_order pages). */
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xen_ulong_t nr_extents;
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unsigned int extent_order;
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#if __XEN_INTERFACE_VERSION__ >= 0x00030209
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/* XENMEMF flags. */
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unsigned int mem_flags;
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#else
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unsigned int address_bits;
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#endif
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/*
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* Domain whose reservation is being changed.
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* Unprivileged domains can specify only DOMID_SELF.
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*/
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domid_t domid;
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};
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typedef struct xen_memory_reservation xen_memory_reservation_t;
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DEFINE_XEN_GUEST_HANDLE(xen_memory_reservation_t);
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/*
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* An atomic exchange of memory pages. If return code is zero then
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* @out.extent_list provides GMFNs of the newly-allocated memory.
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* Returns zero on complete success, otherwise a negative error code.
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* On complete success then always @nr_exchanged == @in.nr_extents.
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* On partial success @nr_exchanged indicates how much work was done.
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*/
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#define XENMEM_exchange 11
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struct xen_memory_exchange {
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/*
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* [IN] Details of memory extents to be exchanged (GMFN bases).
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* Note that @in.address_bits is ignored and unused.
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*/
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struct xen_memory_reservation in;
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/*
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* [IN/OUT] Details of new memory extents.
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* We require that:
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* 1. @in.domid == @out.domid
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* 2. @in.nr_extents << @in.extent_order ==
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* @out.nr_extents << @out.extent_order
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* 3. @in.extent_start and @out.extent_start lists must not overlap
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* 4. @out.extent_start lists GPFN bases to be populated
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* 5. @out.extent_start is overwritten with allocated GMFN bases
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*/
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struct xen_memory_reservation out;
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/*
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* [OUT] Number of input extents that were successfully exchanged:
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* 1. The first @nr_exchanged input extents were successfully
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* deallocated.
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* 2. The corresponding first entries in the output extent list correctly
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* indicate the GMFNs that were successfully exchanged.
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* 3. All other input and output extents are untouched.
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* 4. If not all input exents are exchanged then the return code of this
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* command will be non-zero.
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* 5. THIS FIELD MUST BE INITIALISED TO ZERO BY THE CALLER!
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*/
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xen_ulong_t nr_exchanged;
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};
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typedef struct xen_memory_exchange xen_memory_exchange_t;
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DEFINE_XEN_GUEST_HANDLE(xen_memory_exchange_t);
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/*
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* Returns the maximum machine frame number of mapped RAM in this system.
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* This command always succeeds (it never returns an error code).
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* arg == NULL.
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*/
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#define XENMEM_maximum_ram_page 2
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/*
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* Returns the current or maximum memory reservation, in pages, of the
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* specified domain (may be DOMID_SELF). Returns -ve errcode on failure.
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* arg == addr of domid_t.
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*/
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#define XENMEM_current_reservation 3
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#define XENMEM_maximum_reservation 4
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/*
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* Returns the maximum GPFN in use by the guest, or -ve errcode on failure.
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*/
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#define XENMEM_maximum_gpfn 14
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/*
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* Returns a list of MFN bases of 2MB extents comprising the machine_to_phys
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* mapping table. Architectures which do not have a m2p table do not implement
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* this command.
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* arg == addr of xen_machphys_mfn_list_t.
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*/
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#define XENMEM_machphys_mfn_list 5
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struct xen_machphys_mfn_list {
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/*
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* Size of the 'extent_start' array. Fewer entries will be filled if the
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* machphys table is smaller than max_extents * 2MB.
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*/
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unsigned int max_extents;
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/*
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* Pointer to buffer to fill with list of extent starts. If there are
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* any large discontiguities in the machine address space, 2MB gaps in
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* the machphys table will be represented by an MFN base of zero.
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*/
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XEN_GUEST_HANDLE(xen_pfn_t) extent_start;
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/*
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* Number of extents written to the above array. This will be smaller
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* than 'max_extents' if the machphys table is smaller than max_e * 2MB.
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*/
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unsigned int nr_extents;
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};
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typedef struct xen_machphys_mfn_list xen_machphys_mfn_list_t;
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DEFINE_XEN_GUEST_HANDLE(xen_machphys_mfn_list_t);
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/*
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* For a compat caller, this is identical to XENMEM_machphys_mfn_list.
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*
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* For a non compat caller, this functions similarly to
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* XENMEM_machphys_mfn_list, but returns the mfns making up the compatibility
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* m2p table.
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*/
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#define XENMEM_machphys_compat_mfn_list 25
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/*
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* Returns the location in virtual address space of the machine_to_phys
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* mapping table. Architectures which do not have a m2p table, or which do not
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* map it by default into guest address space, do not implement this command.
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* arg == addr of xen_machphys_mapping_t.
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*/
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#define XENMEM_machphys_mapping 12
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struct xen_machphys_mapping {
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xen_ulong_t v_start, v_end; /* Start and end virtual addresses. */
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xen_ulong_t max_mfn; /* Maximum MFN that can be looked up. */
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};
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typedef struct xen_machphys_mapping xen_machphys_mapping_t;
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DEFINE_XEN_GUEST_HANDLE(xen_machphys_mapping_t);
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/* Source mapping space. */
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/* ` enum phys_map_space { */
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#define XENMAPSPACE_shared_info 0 /* shared info page */
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#define XENMAPSPACE_grant_table 1 /* grant table page */
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#define XENMAPSPACE_gmfn 2 /* GMFN */
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#define XENMAPSPACE_gmfn_range 3 /* GMFN range, XENMEM_add_to_physmap only. */
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#define XENMAPSPACE_gmfn_foreign 4 /* GMFN from another dom,
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* XENMEM_add_to_physmap_batch only. */
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/* ` } */
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/*
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* Sets the GPFN at which a particular page appears in the specified guest's
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* pseudophysical address space.
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* arg == addr of xen_add_to_physmap_t.
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*/
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#define XENMEM_add_to_physmap 7
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struct xen_add_to_physmap {
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/* Which domain to change the mapping for. */
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domid_t domid;
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/* Number of pages to go through for gmfn_range */
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uint16_t size;
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unsigned int space; /* => enum phys_map_space */
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#define XENMAPIDX_grant_table_status 0x80000000
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/* Index into space being mapped. */
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xen_ulong_t idx;
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/* GPFN in domid where the source mapping page should appear. */
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xen_pfn_t gpfn;
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};
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typedef struct xen_add_to_physmap xen_add_to_physmap_t;
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DEFINE_XEN_GUEST_HANDLE(xen_add_to_physmap_t);
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/* A batched version of add_to_physmap. */
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#define XENMEM_add_to_physmap_batch 23
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struct xen_add_to_physmap_batch {
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/* IN */
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/* Which domain to change the mapping for. */
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domid_t domid;
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uint16_t space; /* => enum phys_map_space */
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/* Number of pages to go through */
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uint16_t size;
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domid_t foreign_domid; /* IFF gmfn_foreign */
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/* Indexes into space being mapped. */
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XEN_GUEST_HANDLE(xen_ulong_t) idxs;
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/* GPFN in domid where the source mapping page should appear. */
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XEN_GUEST_HANDLE(xen_pfn_t) gpfns;
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/* OUT */
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/* Per index error code. */
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XEN_GUEST_HANDLE(int) errs;
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};
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typedef struct xen_add_to_physmap_batch xen_add_to_physmap_batch_t;
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DEFINE_XEN_GUEST_HANDLE(xen_add_to_physmap_batch_t);
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#if __XEN_INTERFACE_VERSION__ < 0x00040400
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#define XENMEM_add_to_physmap_range XENMEM_add_to_physmap_batch
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#define xen_add_to_physmap_range xen_add_to_physmap_batch
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typedef struct xen_add_to_physmap_batch xen_add_to_physmap_range_t;
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DEFINE_XEN_GUEST_HANDLE(xen_add_to_physmap_range_t);
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#endif
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/*
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* Unmaps the page appearing at a particular GPFN from the specified guest's
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* pseudophysical address space.
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* arg == addr of xen_remove_from_physmap_t.
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*/
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#define XENMEM_remove_from_physmap 15
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struct xen_remove_from_physmap {
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/* Which domain to change the mapping for. */
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domid_t domid;
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/* GPFN of the current mapping of the page. */
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xen_pfn_t gpfn;
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};
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typedef struct xen_remove_from_physmap xen_remove_from_physmap_t;
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DEFINE_XEN_GUEST_HANDLE(xen_remove_from_physmap_t);
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/*** REMOVED ***/
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/*#define XENMEM_translate_gpfn_list 8*/
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/*
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* Returns the pseudo-physical memory map as it was when the domain
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* was started (specified by XENMEM_set_memory_map).
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* arg == addr of xen_memory_map_t.
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*/
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#define XENMEM_memory_map 9
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struct xen_memory_map {
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/*
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* On call the number of entries which can be stored in buffer. On
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* return the number of entries which have been stored in
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* buffer.
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*/
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unsigned int nr_entries;
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/*
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* Entries in the buffer are in the same format as returned by the
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* BIOS INT 0x15 EAX=0xE820 call.
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*/
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XEN_GUEST_HANDLE(void) buffer;
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};
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typedef struct xen_memory_map xen_memory_map_t;
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DEFINE_XEN_GUEST_HANDLE(xen_memory_map_t);
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/*
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* Returns the real physical memory map. Passes the same structure as
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* XENMEM_memory_map.
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* arg == addr of xen_memory_map_t.
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*/
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#define XENMEM_machine_memory_map 10
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/*
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* Set the pseudo-physical memory map of a domain, as returned by
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* XENMEM_memory_map.
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* arg == addr of xen_foreign_memory_map_t.
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*/
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#define XENMEM_set_memory_map 13
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struct xen_foreign_memory_map {
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domid_t domid;
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struct xen_memory_map map;
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};
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typedef struct xen_foreign_memory_map xen_foreign_memory_map_t;
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DEFINE_XEN_GUEST_HANDLE(xen_foreign_memory_map_t);
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#define XENMEM_set_pod_target 16
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#define XENMEM_get_pod_target 17
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struct xen_pod_target {
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/* IN */
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uint64_t target_pages;
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/* OUT */
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uint64_t tot_pages;
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uint64_t pod_cache_pages;
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uint64_t pod_entries;
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/* IN */
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domid_t domid;
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};
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typedef struct xen_pod_target xen_pod_target_t;
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#if defined(__XEN__) || defined(__XEN_TOOLS__)
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#ifndef uint64_aligned_t
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#define uint64_aligned_t uint64_t
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#endif
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/*
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* Get the number of MFNs saved through memory sharing.
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* The call never fails.
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*/
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#define XENMEM_get_sharing_freed_pages 18
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#define XENMEM_get_sharing_shared_pages 19
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#define XENMEM_paging_op 20
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#define XENMEM_paging_op_nominate 0
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#define XENMEM_paging_op_evict 1
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#define XENMEM_paging_op_prep 2
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struct xen_mem_paging_op {
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uint8_t op; /* XENMEM_paging_op_* */
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domid_t domain;
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/* PAGING_PREP IN: buffer to immediately fill page in */
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uint64_aligned_t buffer;
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/* Other OPs */
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uint64_aligned_t gfn; /* IN: gfn of page being operated on */
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};
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typedef struct xen_mem_paging_op xen_mem_paging_op_t;
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DEFINE_XEN_GUEST_HANDLE(xen_mem_paging_op_t);
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#define XENMEM_access_op 21
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#define XENMEM_access_op_set_access 0
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#define XENMEM_access_op_get_access 1
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#define XENMEM_access_op_enable_emulate 2
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#define XENMEM_access_op_disable_emulate 3
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typedef enum {
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XENMEM_access_n,
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XENMEM_access_r,
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XENMEM_access_w,
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XENMEM_access_rw,
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XENMEM_access_x,
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XENMEM_access_rx,
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XENMEM_access_wx,
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XENMEM_access_rwx,
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/*
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* Page starts off as r-x, but automatically
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* change to r-w on a write
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*/
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XENMEM_access_rx2rw,
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/*
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* Log access: starts off as n, automatically
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* goes to rwx, generating an event without
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* pausing the vcpu
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*/
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XENMEM_access_n2rwx,
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/* Take the domain default */
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XENMEM_access_default
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} xenmem_access_t;
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struct xen_mem_access_op {
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/* XENMEM_access_op_* */
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uint8_t op;
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/* xenmem_access_t */
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uint8_t access;
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domid_t domid;
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/*
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* Number of pages for set op
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* Ignored on setting default access and other ops
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*/
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uint32_t nr;
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/*
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* First pfn for set op
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* pfn for get op
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* ~0ull is used to set and get the default access for pages
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*/
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uint64_aligned_t pfn;
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};
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typedef struct xen_mem_access_op xen_mem_access_op_t;
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DEFINE_XEN_GUEST_HANDLE(xen_mem_access_op_t);
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#define XENMEM_sharing_op 22
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#define XENMEM_sharing_op_nominate_gfn 0
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#define XENMEM_sharing_op_nominate_gref 1
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#define XENMEM_sharing_op_share 2
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#define XENMEM_sharing_op_debug_gfn 3
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#define XENMEM_sharing_op_debug_mfn 4
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#define XENMEM_sharing_op_debug_gref 5
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#define XENMEM_sharing_op_add_physmap 6
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#define XENMEM_sharing_op_audit 7
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#define XENMEM_SHARING_OP_S_HANDLE_INVALID (-10)
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#define XENMEM_SHARING_OP_C_HANDLE_INVALID (-9)
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/* The following allows sharing of grant refs. This is useful
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* for sharing utilities sitting as "filters" in IO backends
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* (e.g. memshr + blktap(2)). The IO backend is only exposed
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* to grant references, and this allows sharing of the grefs */
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#define XENMEM_SHARING_OP_FIELD_IS_GREF_FLAG (1ULL << 62)
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#define XENMEM_SHARING_OP_FIELD_MAKE_GREF(field, val) \
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(field) = (XENMEM_SHARING_OP_FIELD_IS_GREF_FLAG | val)
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#define XENMEM_SHARING_OP_FIELD_IS_GREF(field) \
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((field) & XENMEM_SHARING_OP_FIELD_IS_GREF_FLAG)
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#define XENMEM_SHARING_OP_FIELD_GET_GREF(field) \
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((field) & (~XENMEM_SHARING_OP_FIELD_IS_GREF_FLAG))
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struct xen_mem_sharing_op {
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uint8_t op; /* XENMEM_sharing_op_* */
|
|
domid_t domain;
|
|
|
|
union {
|
|
struct mem_sharing_op_nominate { /* OP_NOMINATE_xxx */
|
|
union {
|
|
uint64_aligned_t gfn; /* IN: gfn to nominate */
|
|
uint32_t grant_ref; /* IN: grant ref to nominate */
|
|
} u;
|
|
uint64_aligned_t handle; /* OUT: the handle */
|
|
} nominate;
|
|
struct mem_sharing_op_share { /* OP_SHARE/ADD_PHYSMAP */
|
|
uint64_aligned_t source_gfn; /* IN: the gfn of the source page */
|
|
uint64_aligned_t source_handle; /* IN: handle to the source page */
|
|
uint64_aligned_t client_gfn; /* IN: the client gfn */
|
|
uint64_aligned_t client_handle; /* IN: handle to the client page */
|
|
domid_t client_domain; /* IN: the client domain id */
|
|
} share;
|
|
struct mem_sharing_op_debug { /* OP_DEBUG_xxx */
|
|
union {
|
|
uint64_aligned_t gfn; /* IN: gfn to debug */
|
|
uint64_aligned_t mfn; /* IN: mfn to debug */
|
|
uint32_t gref; /* IN: gref to debug */
|
|
} u;
|
|
} debug;
|
|
} u;
|
|
};
|
|
typedef struct xen_mem_sharing_op xen_mem_sharing_op_t;
|
|
DEFINE_XEN_GUEST_HANDLE(xen_mem_sharing_op_t);
|
|
|
|
/*
|
|
* Attempt to stake a claim for a domain on a quantity of pages
|
|
* of system RAM, but _not_ assign specific pageframes. Only
|
|
* arithmetic is performed so the hypercall is very fast and need
|
|
* not be preemptible, thus sidestepping time-of-check-time-of-use
|
|
* races for memory allocation. Returns 0 if the hypervisor page
|
|
* allocator has atomically and successfully claimed the requested
|
|
* number of pages, else non-zero.
|
|
*
|
|
* Any domain may have only one active claim. When sufficient memory
|
|
* has been allocated to resolve the claim, the claim silently expires.
|
|
* Claiming zero pages effectively resets any outstanding claim and
|
|
* is always successful.
|
|
*
|
|
* Note that a valid claim may be staked even after memory has been
|
|
* allocated for a domain. In this case, the claim is not incremental,
|
|
* i.e. if the domain's tot_pages is 3, and a claim is staked for 10,
|
|
* only 7 additional pages are claimed.
|
|
*
|
|
* Caller must be privileged or the hypercall fails.
|
|
*/
|
|
#define XENMEM_claim_pages 24
|
|
|
|
/*
|
|
* XENMEM_claim_pages flags - the are no flags at this time.
|
|
* The zero value is appropiate.
|
|
*/
|
|
|
|
/*
|
|
* With some legacy devices, certain guest-physical addresses cannot safely
|
|
* be used for other purposes, e.g. to map guest RAM. This hypercall
|
|
* enumerates those regions so the toolstack can avoid using them.
|
|
*/
|
|
#define XENMEM_reserved_device_memory_map 27
|
|
struct xen_reserved_device_memory {
|
|
xen_pfn_t start_pfn;
|
|
xen_ulong_t nr_pages;
|
|
};
|
|
typedef struct xen_reserved_device_memory xen_reserved_device_memory_t;
|
|
DEFINE_XEN_GUEST_HANDLE(xen_reserved_device_memory_t);
|
|
|
|
struct xen_reserved_device_memory_map {
|
|
#define XENMEM_RDM_ALL 1 /* Request all regions (ignore dev union). */
|
|
/* IN */
|
|
uint32_t flags;
|
|
/*
|
|
* IN/OUT
|
|
*
|
|
* Gets set to the required number of entries when too low,
|
|
* signaled by error code -ERANGE.
|
|
*/
|
|
unsigned int nr_entries;
|
|
/* OUT */
|
|
XEN_GUEST_HANDLE(xen_reserved_device_memory_t) buffer;
|
|
/* IN */
|
|
union {
|
|
struct physdev_pci_device pci;
|
|
} dev;
|
|
};
|
|
typedef struct xen_reserved_device_memory_map xen_reserved_device_memory_map_t;
|
|
DEFINE_XEN_GUEST_HANDLE(xen_reserved_device_memory_map_t);
|
|
|
|
#endif /* defined(__XEN__) || defined(__XEN_TOOLS__) */
|
|
|
|
/*
|
|
* XENMEM_get_vnumainfo used by guest to get
|
|
* vNUMA topology from hypervisor.
|
|
*/
|
|
#define XENMEM_get_vnumainfo 26
|
|
|
|
/* vNUMA node memory ranges */
|
|
struct xen_vmemrange {
|
|
uint64_t start, end;
|
|
unsigned int flags;
|
|
unsigned int nid;
|
|
};
|
|
typedef struct xen_vmemrange xen_vmemrange_t;
|
|
DEFINE_XEN_GUEST_HANDLE(xen_vmemrange_t);
|
|
|
|
/*
|
|
* vNUMA topology specifies vNUMA node number, distance table,
|
|
* memory ranges and vcpu mapping provided for guests.
|
|
* XENMEM_get_vnumainfo hypercall expects to see from guest
|
|
* nr_vnodes, nr_vmemranges and nr_vcpus to indicate available memory.
|
|
* After filling guests structures, nr_vnodes, nr_vmemranges and nr_vcpus
|
|
* copied back to guest. Domain returns expected values of nr_vnodes,
|
|
* nr_vmemranges and nr_vcpus to guest if the values where incorrect.
|
|
*/
|
|
struct xen_vnuma_topology_info {
|
|
/* IN */
|
|
domid_t domid;
|
|
uint16_t pad;
|
|
/* IN/OUT */
|
|
unsigned int nr_vnodes;
|
|
unsigned int nr_vcpus;
|
|
unsigned int nr_vmemranges;
|
|
/* OUT */
|
|
union {
|
|
XEN_GUEST_HANDLE(uint) h;
|
|
uint64_t pad;
|
|
} vdistance;
|
|
union {
|
|
XEN_GUEST_HANDLE(uint) h;
|
|
uint64_t pad;
|
|
} vcpu_to_vnode;
|
|
union {
|
|
XEN_GUEST_HANDLE(xen_vmemrange_t) h;
|
|
uint64_t pad;
|
|
} vmemrange;
|
|
};
|
|
typedef struct xen_vnuma_topology_info xen_vnuma_topology_info_t;
|
|
DEFINE_XEN_GUEST_HANDLE(xen_vnuma_topology_info_t);
|
|
|
|
/* Next available subop number is 28 */
|
|
|
|
#endif /* __XEN_PUBLIC_MEMORY_H__ */
|
|
|
|
/*
|
|
* Local variables:
|
|
* mode: C
|
|
* c-file-style: "BSD"
|
|
* c-basic-offset: 4
|
|
* tab-width: 4
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*/
|