]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * PowerPC KVM support | |
3 | * | |
4 | * Copyright IBM Corp. 2008 | |
5 | * | |
6 | * Authors: | |
7 | * Hollis Blanchard <hollisb@us.ibm.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2 or later. | |
10 | * See the COPYING file in the top-level directory. | |
11 | * | |
12 | */ | |
13 | ||
14 | #include "qemu-common.h" | |
15 | #include "qemu/timer.h" | |
16 | #include "kvm_ppc.h" | |
17 | #include "sysemu/device_tree.h" | |
18 | ||
19 | #define PROC_DEVTREE_PATH "/proc/device-tree" | |
20 | ||
21 | static QEMUTimer *kvmppc_timer; | |
22 | static unsigned int kvmppc_timer_rate; | |
23 | ||
24 | static void kvmppc_timer_hack(void *opaque) | |
25 | { | |
26 | qemu_notify_event(); | |
27 | qemu_mod_timer(kvmppc_timer, qemu_get_clock_ns(vm_clock) + kvmppc_timer_rate); | |
28 | } | |
29 | ||
30 | void kvmppc_init(void) | |
31 | { | |
32 | /* XXX The only reason KVM yields control back to qemu is device IO. Since | |
33 | * an idle guest does no IO, qemu's device model will never get a chance to | |
34 | * run. So, until QEMU gains IO threads, we create this timer to ensure | |
35 | * that the device model gets a chance to run. */ | |
36 | kvmppc_timer_rate = get_ticks_per_sec() / 10; | |
37 | kvmppc_timer = qemu_new_timer_ns(vm_clock, &kvmppc_timer_hack, NULL); | |
38 | qemu_mod_timer(kvmppc_timer, qemu_get_clock_ns(vm_clock) + kvmppc_timer_rate); | |
39 | } | |
40 |