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[Qemu-devel] [PATCH V3] Guest stop notification
From: |
Eric B Munson |
Subject: |
[Qemu-devel] [PATCH V3] Guest stop notification |
Date: |
Fri, 2 Dec 2011 14:19:20 -0500 |
Often when a guest is stopped from the qemu console, it will report spurious
soft lockup warnings on resume. There are kernel patches being discussed that
will give the host the ability to tell the guest that it is being stopped and
should ignore the soft lockup warning that generates.
Signed-off-by: Eric B Munson <address@hidden>
Cc: Avi Kivity <address@hidden>
Cc: Marcelo Tosatti <address@hidden>
Cc: Jan Kiszka <address@hidden>
Cc: address@hidden
Cc: address@hidden
Cc: address@hidden
---
Changes from V2:
Move ioctl into hw/kvmclock.c so as other arches can use it as it is
implemented
Changes from V1:
Remove unnecessary encapsulating function
hw/kvmclock.c | 24 ++++++++++++++++++++++++
1 files changed, 24 insertions(+), 0 deletions(-)
diff --git a/hw/kvmclock.c b/hw/kvmclock.c
index 5388bc4..756839f 100644
--- a/hw/kvmclock.c
+++ b/hw/kvmclock.c
@@ -16,6 +16,7 @@
#include "sysbus.h"
#include "kvm.h"
#include "kvmclock.h"
+#include "cpu-all.h"
#include <linux/kvm.h>
#include <linux/kvm_para.h>
@@ -69,11 +70,34 @@ static void kvmclock_vm_state_change(void *opaque, int
running,
}
}
+static void kvmclock_vm_state_change_vcpu(void *opaque, int running,
+ RunState state)
+{
+ int ret;
+ CPUState *penv = first_cpu;
+
+ if (running) {
+ while (penv) {
+ ret = kvm_vcpu_ioctl(penv, KVM_GUEST_PAUSED, 0);
+ if (ret) {
+ if (ret != ENOSYS) {
+ fprintf(stderr,
+ "kvmclock_vm_state_change_vcpu: %s\n",
+ strerror(-ret));
+ }
+ return;
+ }
+ penv = (CPUState *)penv->next_cpu;
+ }
+ }
+}
+
static int kvmclock_init(SysBusDevice *dev)
{
KVMClockState *s = FROM_SYSBUS(KVMClockState, dev);
qemu_add_vm_change_state_handler(kvmclock_vm_state_change, s);
+ qemu_add_vm_change_state_handler(kvmclock_vm_state_change_vcpu, NULL);
return 0;
}
--
1.7.5.4
- [Qemu-devel] [PATCH V3] Guest stop notification,
Eric B Munson <=
- Re: [Qemu-devel] [PATCH V3] Guest stop notification, Jan Kiszka, 2011/12/02
- Re: [Qemu-devel] [PATCH V3] Guest stop notification, Eric B Munson, 2011/12/02
- Re: [Qemu-devel] [PATCH V3] Guest stop notification, Jan Kiszka, 2011/12/03
- Re: [Qemu-devel] [PATCH V3] Guest stop notification, Marcelo Tosatti, 2011/12/03
- Re: [Qemu-devel] [PATCH V3] Guest stop notification, Jan Kiszka, 2011/12/03
- Re: [Qemu-devel] [PATCH V3] Guest stop notification, Marcelo Tosatti, 2011/12/03
- Re: [Qemu-devel] [PATCH V3] Guest stop notification, Jan Kiszka, 2011/12/03
- Re: [Qemu-devel] [PATCH V3] Guest stop notification, Marcelo Tosatti, 2011/12/05
- Re: [Qemu-devel] [PATCH V3] Guest stop notification, Jan Kiszka, 2011/12/05
- Re: [Qemu-devel] [PATCH V3] Guest stop notification, Eric B Munson, 2011/12/05