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Annotation of qemu/target-ppc/kvm_ppc.c, revision 1.1.1.5

1.1       root        1: /*
                      2:  * PowerPC KVM support
                      3:  *
                      4:  * Copyright IBM Corp. 2008
                      5:  *
                      6:  * Authors:
                      7:  *  Hollis Blanchard <[email protected]>
                      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 "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: {
1.1.1.4   root       26:     qemu_notify_event();
1.1.1.3   root       27:     qemu_mod_timer(kvmppc_timer, qemu_get_clock_ns(vm_clock) + kvmppc_timer_rate);
1.1       root       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
1.1.1.5 ! root       34:      * run. So, until QEMU gains IO threads, we create this timer to ensure
1.1       root       35:      * that the device model gets a chance to run. */
1.1.1.2   root       36:     kvmppc_timer_rate = get_ticks_per_sec() / 10;
1.1.1.3   root       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);
1.1       root       39: }
                     40: 

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