147 lines
4.3 KiB
C
147 lines
4.3 KiB
C
/*
|
|
* 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;
|
|
}
|
|
|
|
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;
|
|
}
|