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| author | Konstantin Weitz <WEITZKON@de.ibm.com> | 2012-04-25 13:30:38 (GMT) |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2012-05-01 00:38:31 (GMT) |
| commit | 41628d334361670d825fb03c04568f5ef9f084dc (patch) | |
| tree | 88b2eadd0f7de12f1d8b226e4491532b8783ee94 /include | |
| parent | b6ddf05ff68d81a7c1736717faf492b70e9bf4f9 (diff) | |
| download | linux-41628d334361670d825fb03c04568f5ef9f084dc.tar.xz | |
KVM: s390: Implement the directed yield (diag 9c) hypervisor call for KVM
This patch implements the directed yield hypercall found on other
System z hypervisors. It delegates execution time to the virtual cpu
specified in the instruction's parameter.
Useful to avoid long spinlock waits in the guest.
Christian Borntraeger: moved common code in virt/kvm/
Signed-off-by: Konstantin Weitz <WEITZKON@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/kvm_host.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 6f34330..cae342d 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -461,6 +461,7 @@ void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot, void kvm_vcpu_block(struct kvm_vcpu *vcpu); void kvm_vcpu_kick(struct kvm_vcpu *vcpu); +bool kvm_vcpu_yield_to(struct kvm_vcpu *target); void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu); void kvm_resched(struct kvm_vcpu *vcpu); void kvm_load_guest_fpu(struct kvm_vcpu *vcpu); |