/* * 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); }