mirror of https://gitee.com/openkylin/qemu.git
41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
/*
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* PowerPC KVM support
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*
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* Copyright IBM Corp. 2008
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*
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* Authors:
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* Hollis Blanchard <hollisb@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#include "qemu-common.h"
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#include "qemu/timer.h"
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#include "kvm_ppc.h"
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#include "sysemu/device_tree.h"
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#define PROC_DEVTREE_PATH "/proc/device-tree"
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static QEMUTimer *kvmppc_timer;
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static unsigned int kvmppc_timer_rate;
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static void kvmppc_timer_hack(void *opaque)
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{
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qemu_notify_event();
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qemu_mod_timer(kvmppc_timer, qemu_get_clock_ns(vm_clock) + kvmppc_timer_rate);
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}
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void kvmppc_init(void)
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{
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/* XXX The only reason KVM yields control back to qemu is device IO. Since
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* an idle guest does no IO, qemu's device model will never get a chance to
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* run. So, until QEMU gains IO threads, we create this timer to ensure
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* that the device model gets a chance to run. */
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kvmppc_timer_rate = get_ticks_per_sec() / 10;
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kvmppc_timer = qemu_new_timer_ns(vm_clock, &kvmppc_timer_hack, NULL);
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qemu_mod_timer(kvmppc_timer, qemu_get_clock_ns(vm_clock) + kvmppc_timer_rate);
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}
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