diff options
| author | Gleb Natapov <gleb@redhat.com> | 2010-01-17 15:51:24 +0200 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2010-03-01 12:36:00 -0300 |
| commit | c25bc1638a1211f57cccbabdd8b732813b852340 (patch) | |
| tree | 84ab4bad029c31e7cf121f53d6d19010f4743944 | |
| parent | 10388a07164c1512b3a3d0273b9adc230f82790e (diff) | |
KVM: Implement NotifyLongSpinWait HYPER-V hypercall
Windows issues this hypercall after guest was spinning on a spinlock
for too many iterations.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Vadim Rozenfeld <vrozenfe@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
| -rw-r--r-- | arch/x86/kvm/x86.c | 10 | ||||
| -rw-r--r-- | include/linux/kvm.h | 1 |
2 files changed, 10 insertions, 1 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 552be51e4d84..9f72a443455b 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1564,6 +1564,7 @@ int kvm_dev_ioctl_check_extension(long ext) case KVM_CAP_VCPU_EVENTS: case KVM_CAP_HYPERV: case KVM_CAP_HYPERV_VAPIC: + case KVM_CAP_HYPERV_SPIN: r = 1; break; case KVM_CAP_COALESCED_MMIO: @@ -3827,7 +3828,14 @@ int kvm_hv_hypercall(struct kvm_vcpu *vcpu) trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa); - res = HV_STATUS_INVALID_HYPERCALL_CODE; + switch (code) { + case HV_X64_HV_NOTIFY_LONG_SPIN_WAIT: + kvm_vcpu_on_spin(vcpu); + break; + default: + res = HV_STATUS_INVALID_HYPERCALL_CODE; + break; + } ret = res | (((u64)rep_done & 0xfff) << 32); if (longmode) { diff --git a/include/linux/kvm.h b/include/linux/kvm.h index 5ce61738dc30..4c4937e7f65f 100644 --- a/include/linux/kvm.h +++ b/include/linux/kvm.h @@ -499,6 +499,7 @@ struct kvm_ioeventfd { #define KVM_CAP_PPC_SEGSTATE 43 #define KVM_CAP_HYPERV 44 #define KVM_CAP_HYPERV_VAPIC 45 +#define KVM_CAP_HYPERV_SPIN 46 #ifdef KVM_CAP_IRQ_ROUTING |