Add qemu 2.4.0

[kvmfornfv.git] / qemu / target-ppc / kvm_ppc.c

diff --git a/qemu/target-ppc/kvm_ppc.c b/qemu/target-ppc/kvm_ppc.c
new file mode 100644 (file)
index 0000000..f769acd
--- /dev/null
+++ b/qemu/target-ppc/kvm_ppc.c
@@ -0,0 +1,41 @@
+/*
+ * PowerPC KVM support
+ *
+ * Copyright IBM Corp. 2008
+ *
+ * Authors:
+ *  Hollis Blanchard <hollisb@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu-common.h"
+#include "qemu/timer.h"
+#include "kvm_ppc.h"
+#include "sysemu/device_tree.h"
+#include "qemu/main-loop.h"
+
+#define PROC_DEVTREE_PATH "/proc/device-tree"
+
+static QEMUTimer *kvmppc_timer;
+static unsigned int kvmppc_timer_rate;
+
+static void kvmppc_timer_hack(void *opaque)
+{
+    qemu_notify_event();
+    timer_mod(kvmppc_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + kvmppc_timer_rate);
+}
+
+void kvmppc_init(void)
+{
+    /* XXX The only reason KVM yields control back to qemu is device IO. Since
+     * an idle guest does no IO, qemu's device model will never get a chance to
+     * run. So, until QEMU gains IO threads, we create this timer to ensure
+     * that the device model gets a chance to run. */
+    kvmppc_timer_rate = get_ticks_per_sec() / 10;
+    kvmppc_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &kvmppc_timer_hack, NULL);
+    timer_mod(kvmppc_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + kvmppc_timer_rate);
+}
+