diff options
| author | Gleb Natapov | 2010-01-17 14:51:24 +0100 |
|---|---|---|
| committer | Marcelo Tosatti | 2010-03-01 16:36:00 +0100 |
| commit | c25bc1638a1211f57cccbabdd8b732813b852340 (patch) | |
| tree | 84ab4bad029c31e7cf121f53d6d19010f4743944 /arch/x86/kvm/x86.c | |
| parent | KVM: Add HYPER-V apic access MSRs (diff) | |
| download | kernel-qcow2-linux-c25bc1638a1211f57cccbabdd8b732813b852340.tar.gz kernel-qcow2-linux-c25bc1638a1211f57cccbabdd8b732813b852340.tar.xz kernel-qcow2-linux-c25bc1638a1211f57cccbabdd8b732813b852340.zip | |
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>
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 10 |
1 files changed, 9 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) { |