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authorClaudio Fontana <cfontana@suse.de>2020-06-29 11:35:02 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2020-07-10 18:02:24 -0400
commitc7f419f5841a840f3b90e839ef014b94131e5df8 (patch)
tree83e6cfae6c5de28dd6ca244a00c8eb2f5cf7a9d6 /softmmu/balloon.c
parent0b33521ea16463d7f942ddb2b354fa029c96231f (diff)
softmmu: move softmmu only files from root
move arch_init, balloon, cpus, ioport, memory, memory_mapping, qtest. They are all specific to CONFIG_SOFTMMU. Signed-off-by: Claudio Fontana <cfontana@suse.de> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Laurent Vivier <lvivier@redhat.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Message-Id: <20200629093504.3228-2-cfontana@suse.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'softmmu/balloon.c')
-rw-r--r--softmmu/balloon.c106
1 files changed, 106 insertions, 0 deletions
diff --git a/softmmu/balloon.c b/softmmu/balloon.c
new file mode 100644
index 0000000000..354408c6ea
--- /dev/null
+++ b/softmmu/balloon.c
@@ -0,0 +1,106 @@
+/*
+ * Generic Balloon handlers and management
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ * Copyright (C) 2011 Red Hat, Inc.
+ * Copyright (C) 2011 Amit Shah <amit.shah@redhat.com>
+ *
+ * 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 "qemu/osdep.h"
+#include "qemu/atomic.h"
+#include "sysemu/kvm.h"
+#include "sysemu/balloon.h"
+#include "trace-root.h"
+#include "qapi/error.h"
+#include "qapi/qapi-commands-misc.h"
+#include "qapi/qmp/qerror.h"
+
+static QEMUBalloonEvent *balloon_event_fn;
+static QEMUBalloonStatus *balloon_stat_fn;
+static void *balloon_opaque;
+
+static bool have_balloon(Error **errp)
+{
+ if (kvm_enabled() && !kvm_has_sync_mmu()) {
+ error_set(errp, ERROR_CLASS_KVM_MISSING_CAP,
+ "Using KVM without synchronous MMU, balloon unavailable");
+ return false;
+ }
+ if (!balloon_event_fn) {
+ error_set(errp, ERROR_CLASS_DEVICE_NOT_ACTIVE,
+ "No balloon device has been activated");
+ return false;
+ }
+ return true;
+}
+
+int qemu_add_balloon_handler(QEMUBalloonEvent *event_func,
+ QEMUBalloonStatus *stat_func, void *opaque)
+{
+ if (balloon_event_fn || balloon_stat_fn || balloon_opaque) {
+ /* We're already registered one balloon handler. How many can
+ * a guest really have?
+ */
+ return -1;
+ }
+ balloon_event_fn = event_func;
+ balloon_stat_fn = stat_func;
+ balloon_opaque = opaque;
+ return 0;
+}
+
+void qemu_remove_balloon_handler(void *opaque)
+{
+ if (balloon_opaque != opaque) {
+ return;
+ }
+ balloon_event_fn = NULL;
+ balloon_stat_fn = NULL;
+ balloon_opaque = NULL;
+}
+
+BalloonInfo *qmp_query_balloon(Error **errp)
+{
+ BalloonInfo *info;
+
+ if (!have_balloon(errp)) {
+ return NULL;
+ }
+
+ info = g_malloc0(sizeof(*info));
+ balloon_stat_fn(balloon_opaque, info);
+ return info;
+}
+
+void qmp_balloon(int64_t target, Error **errp)
+{
+ if (!have_balloon(errp)) {
+ return;
+ }
+
+ if (target <= 0) {
+ error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "target", "a size");
+ return;
+ }
+
+ trace_balloon_event(balloon_opaque, target);
+ balloon_event_fn(balloon_opaque, target);
+}