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/*
* 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);
}
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