From: Eric B Munson <[email protected]> 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. This patch uses the qemu Notifier system to tell the guest it is about to be stopped.
Signed-off-by: Eric B Munson <[email protected]> Signed-off-by: Raghavendra K T <[email protected]> Reviewed-by: Andreas Färber <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]> --- hw/kvm/clock.c | 16 ++++++++++++++++ 1 files changed, 16 insertions(+), 0 deletions(-) diff --git a/hw/kvm/clock.c b/hw/kvm/clock.c index 446bd62..824b978 100644 --- a/hw/kvm/clock.c +++ b/hw/kvm/clock.c @@ -65,9 +65,25 @@ static void kvmclock_vm_state_change(void *opaque, int running, RunState state) { KVMClockState *s = opaque; + CPUArchState *penv = first_cpu; + int cap_clock_ctrl = kvm_check_extension(kvm_state, KVM_CAP_KVMCLOCK_CTRL); + int ret; if (running) { s->clock_valid = false; + + if (!cap_clock_ctrl) { + return; + } + for (penv = first_cpu; penv != NULL; penv = penv->next_cpu) { + ret = kvm_vcpu_ioctl(penv, KVM_KVMCLOCK_CTRL, 0); + if (ret) { + if (ret != -EINVAL) { + fprintf(stderr, "%s: %s\n", __func__, strerror(-ret)); + } + return; + } + } } } -- 1.7.6.4 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
