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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,146 @@ | ||
| /* | ||
| * QEMU System Emulator | ||
| * | ||
| * Copyright (c) 2003-2008 Fabrice Bellard | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| * of this software and associated documentation files (the "Software"), to deal | ||
| * in the Software without restriction, including without limitation the rights | ||
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| * copies of the Software, and to permit persons to whom the Software is | ||
| * furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included in | ||
| * all copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | ||
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
| * THE SOFTWARE. | ||
| */ | ||
|
|
||
| #include "sysemu.h" | ||
| #include "monitor.h" | ||
| #include "qjson.h" | ||
| #include "qint.h" | ||
| #include "cpu-common.h" | ||
| #include "kvm.h" | ||
| #include "balloon.h" | ||
|
|
||
|
|
||
| static QEMUBalloonEvent *qemu_balloon_event; | ||
| void *qemu_balloon_event_opaque; | ||
|
|
||
| void qemu_add_balloon_handler(QEMUBalloonEvent *func, void *opaque) | ||
| { | ||
| qemu_balloon_event = func; | ||
| qemu_balloon_event_opaque = opaque; | ||
| } | ||
|
|
||
| int qemu_balloon(ram_addr_t target, MonitorCompletion cb, void *opaque) | ||
| { | ||
| if (qemu_balloon_event) { | ||
| qemu_balloon_event(qemu_balloon_event_opaque, target, cb, opaque); | ||
| return 1; | ||
| } else { | ||
| return 0; | ||
| } | ||
| } | ||
|
|
||
| int qemu_balloon_status(MonitorCompletion cb, void *opaque) | ||
| { | ||
| if (qemu_balloon_event) { | ||
| qemu_balloon_event(qemu_balloon_event_opaque, 0, cb, opaque); | ||
| return 1; | ||
| } else { | ||
| return 0; | ||
| } | ||
| } | ||
|
|
||
| static void print_balloon_stat(const char *key, QObject *obj, void *opaque) | ||
| { | ||
| Monitor *mon = opaque; | ||
|
|
||
| if (strcmp(key, "actual")) | ||
| monitor_printf(mon, ",%s=%" PRId64, key, | ||
| qint_get_int(qobject_to_qint(obj))); | ||
| } | ||
|
|
||
| void monitor_print_balloon(Monitor *mon, const QObject *data) | ||
| { | ||
| QDict *qdict; | ||
|
|
||
| qdict = qobject_to_qdict(data); | ||
| if (!qdict_haskey(qdict, "actual")) | ||
| return; | ||
|
|
||
| monitor_printf(mon, "balloon: actual=%" PRId64, | ||
| qdict_get_int(qdict, "actual") >> 20); | ||
| qdict_iter(qdict, print_balloon_stat, mon); | ||
| monitor_printf(mon, "\n"); | ||
| } | ||
|
|
||
| /** | ||
| * do_info_balloon(): Balloon information | ||
| * | ||
| * Make an asynchronous request for balloon info. When the request completes | ||
| * a QDict will be returned according to the following specification: | ||
| * | ||
| * - "actual": current balloon value in bytes | ||
| * The following fields may or may not be present: | ||
| * - "mem_swapped_in": Amount of memory swapped in (bytes) | ||
| * - "mem_swapped_out": Amount of memory swapped out (bytes) | ||
| * - "major_page_faults": Number of major faults | ||
| * - "minor_page_faults": Number of minor faults | ||
| * - "free_mem": Total amount of free and unused memory (bytes) | ||
| * - "total_mem": Total amount of available memory (bytes) | ||
| * | ||
| * Example: | ||
| * | ||
| * { "actual": 1073741824, "mem_swapped_in": 0, "mem_swapped_out": 0, | ||
| * "major_page_faults": 142, "minor_page_faults": 239245, | ||
| * "free_mem": 1014185984, "total_mem": 1044668416 } | ||
| */ | ||
| int do_info_balloon(Monitor *mon, MonitorCompletion cb, void *opaque) | ||
| { | ||
| int ret; | ||
|
|
||
| if (kvm_enabled() && !kvm_has_sync_mmu()) { | ||
| qerror_report(QERR_KVM_MISSING_CAP, "synchronous MMU", "balloon"); | ||
| return -1; | ||
| } | ||
|
|
||
| ret = qemu_balloon_status(cb, opaque); | ||
| if (!ret) { | ||
| qerror_report(QERR_DEVICE_NOT_ACTIVE, "balloon"); | ||
| return -1; | ||
| } | ||
|
|
||
| return 0; | ||
| } | ||
|
|
||
| /** | ||
| * do_balloon(): Request VM to change its memory allocation | ||
| */ | ||
| int do_balloon(Monitor *mon, const QDict *params, | ||
| MonitorCompletion cb, void *opaque) | ||
| { | ||
| int ret; | ||
|
|
||
| if (kvm_enabled() && !kvm_has_sync_mmu()) { | ||
| qerror_report(QERR_KVM_MISSING_CAP, "synchronous MMU", "balloon"); | ||
| return -1; | ||
| } | ||
|
|
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| ret = qemu_balloon(qdict_get_int(params, "value"), cb, opaque); | ||
| if (ret == 0) { | ||
| qerror_report(QERR_DEVICE_NOT_ACTIVE, "balloon"); | ||
| return -1; | ||
| } | ||
|
|
||
| cb(opaque, NULL); | ||
| return 0; | ||
| } |
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