On Tue, Oct 25, 2011 at 03:26:16PM -0400, Eric B Munson wrote: > Now that we have a flag that will tell the guest it was suspended, create an > interface for that communication using a KVM ioctl. > > Signed-off-by: Eric B Munson <[email protected]> > --- > arch/x86/include/asm/pvclock.h | 3 +++ > arch/x86/kernel/kvmclock.c | 12 ++++++++++++ > arch/x86/kvm/x86.c | 5 +++++ > include/linux/kvm.h | 2 ++ > 4 files changed, 22 insertions(+), 0 deletions(-) > > diff --git a/arch/x86/include/asm/pvclock.h b/arch/x86/include/asm/pvclock.h > index 7d3ba41..9312814 100644 > --- a/arch/x86/include/asm/pvclock.h > +++ b/arch/x86/include/asm/pvclock.h > @@ -3,6 +3,7 @@ > > #include <linux/clocksource.h> > #include <asm/pvclock-abi.h> > +#include <linux/kvm_host.h> > > /* some helper functions for xen and kvm pv clock sources */ > cycle_t pvclock_clocksource_read(struct pvclock_vcpu_time_info *src); > @@ -13,6 +14,8 @@ void pvclock_read_wallclock(struct pvclock_wall_clock *wall, > struct timespec *ts); > void pvclock_resume(void); > > +void kvm_set_host_stopped(struct kvm_vcpu *vcpu); > + > bool kvm_check_and_clear_host_stopped(int cpu); > > /* > diff --git a/arch/x86/kernel/kvmclock.c b/arch/x86/kernel/kvmclock.c > index 8ddcfaf..f4fff3d 100644 > --- a/arch/x86/kernel/kvmclock.c > +++ b/arch/x86/kernel/kvmclock.c > @@ -22,6 +22,7 @@ > #include <asm/msr.h> > #include <asm/apic.h> > #include <linux/percpu.h> > +#include <linux/kvm_host.h> > > #include <asm/x86_init.h> > #include <asm/reboot.h> > @@ -113,6 +114,17 @@ static void kvm_get_preset_lpj(void) > preset_lpj = lpj; > } > > +/* > + * kvm_set_host_stopped() indicates to the guest kernel that it has been > + * stopped by the hypervisor. This function will be called from the host > only. > + */ > +void kvm_set_host_stopped(struct kvm_vcpu *vcpu) > +{ > + struct pvclock_vcpu_time_info *src = &vcpu->arch.hv_clock; > + src->flags |= PVCLOCK_GUEST_STOPPED; > +} > +EXPORT_SYMBOL_GPL(kvm_set_host_stopped); > + > bool kvm_check_and_clear_host_stopped(int cpu) > { > bool ret = false; > diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c > index 84a28ea..16e029e 100644 > --- a/arch/x86/kvm/x86.c > +++ b/arch/x86/kvm/x86.c > @@ -3264,6 +3264,11 @@ long kvm_arch_vcpu_ioctl(struct file *filp, > > goto out; > } > + case KVM_PAUSE_GUEST: {
Pause guest?? :) > + r = 0; > + kvm_set_host_stopped(vcpu); > + break; > + } > default: > r = -EINVAL; > } -- 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
