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authorJeremy Fitzhardinge <jeremy@goop.org>2008-04-02 13:54:13 -0400
committerIngo Molnar <mingo@elte.hu>2008-04-24 17:57:33 -0400
commit1775826ceec51187aa868406585799b7e76ffa7d (patch)
tree585b75deeb350a36ff54095de591ecd58e860ea1 /include/xen/interface
parentaf7ae3b9c4a4c1337903f31131d58e3c0d2b6d55 (diff)
xen: add balloon driver
The balloon driver allows memory to be dynamically added or removed from the domain, in order to allow host memory to be balanced between multiple domains. This patch introduces the Xen balloon driver, though it currently only allows a domain to be shrunk from its initial size (and re-grown back to that size). A later patch will add the ability to grow a domain beyond its initial size. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/xen/interface')
-rw-r--r--include/xen/interface/memory.h12
1 files changed, 4 insertions, 8 deletions
diff --git a/include/xen/interface/memory.h b/include/xen/interface/memory.h
index af36ead16817..da768469aa92 100644
--- a/include/xen/interface/memory.h
+++ b/include/xen/interface/memory.h
@@ -29,7 +29,7 @@ struct xen_memory_reservation {
29 * OUT: GMFN bases of extents that were allocated 29 * OUT: GMFN bases of extents that were allocated
30 * (NB. This command also updates the mach_to_phys translation table) 30 * (NB. This command also updates the mach_to_phys translation table)
31 */ 31 */
32 GUEST_HANDLE(ulong) extent_start; 32 ulong extent_start;
33 33
34 /* Number of extents, and size/alignment of each (2^extent_order pages). */ 34 /* Number of extents, and size/alignment of each (2^extent_order pages). */
35 unsigned long nr_extents; 35 unsigned long nr_extents;
@@ -50,7 +50,6 @@ struct xen_memory_reservation {
50 domid_t domid; 50 domid_t domid;
51 51
52}; 52};
53DEFINE_GUEST_HANDLE_STRUCT(xen_memory_reservation);
54 53
55/* 54/*
56 * Returns the maximum machine frame number of mapped RAM in this system. 55 * Returns the maximum machine frame number of mapped RAM in this system.
@@ -86,7 +85,7 @@ struct xen_machphys_mfn_list {
86 * any large discontiguities in the machine address space, 2MB gaps in 85 * any large discontiguities in the machine address space, 2MB gaps in
87 * the machphys table will be represented by an MFN base of zero. 86 * the machphys table will be represented by an MFN base of zero.
88 */ 87 */
89 GUEST_HANDLE(ulong) extent_start; 88 ulong extent_start;
90 89
91 /* 90 /*
92 * Number of extents written to the above array. This will be smaller 91 * Number of extents written to the above array. This will be smaller
@@ -94,7 +93,6 @@ struct xen_machphys_mfn_list {
94 */ 93 */
95 unsigned int nr_extents; 94 unsigned int nr_extents;
96}; 95};
97DEFINE_GUEST_HANDLE_STRUCT(xen_machphys_mfn_list);
98 96
99/* 97/*
100 * Sets the GPFN at which a particular page appears in the specified guest's 98 * Sets the GPFN at which a particular page appears in the specified guest's
@@ -117,7 +115,6 @@ struct xen_add_to_physmap {
117 /* GPFN where the source mapping page should appear. */ 115 /* GPFN where the source mapping page should appear. */
118 unsigned long gpfn; 116 unsigned long gpfn;
119}; 117};
120DEFINE_GUEST_HANDLE_STRUCT(xen_add_to_physmap);
121 118
122/* 119/*
123 * Translates a list of domain-specific GPFNs into MFNs. Returns a -ve error 120 * Translates a list of domain-specific GPFNs into MFNs. Returns a -ve error
@@ -132,14 +129,13 @@ struct xen_translate_gpfn_list {
132 unsigned long nr_gpfns; 129 unsigned long nr_gpfns;
133 130
134 /* List of GPFNs to translate. */ 131 /* List of GPFNs to translate. */
135 GUEST_HANDLE(ulong) gpfn_list; 132 ulong gpfn_list;
136 133
137 /* 134 /*
138 * Output list to contain MFN translations. May be the same as the input 135 * Output list to contain MFN translations. May be the same as the input
139 * list (in which case each input GPFN is overwritten with the output MFN). 136 * list (in which case each input GPFN is overwritten with the output MFN).
140 */ 137 */
141 GUEST_HANDLE(ulong) mfn_list; 138 ulong mfn_list;
142}; 139};
143DEFINE_GUEST_HANDLE_STRUCT(xen_translate_gpfn_list);
144 140
145#endif /* __XEN_PUBLIC_MEMORY_H__ */ 141#endif /* __XEN_PUBLIC_MEMORY_H__ */