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| author | David Hildenbrand | 2014-04-10 17:35:00 +0200 |
|---|---|---|
| committer | Christian Borntraeger | 2014-07-10 14:11:17 +0200 |
| commit | 6352e4d2dd9a349024a41356148eced553e1dce4 (patch) | |
| tree | 2835b0ebeacb7dc0f13e4df266f38e441b08243a /arch/s390/kvm/kvm-s390.h | |
| parent | KVM: prepare for KVM_(S|G)ET_MP_STATE on other architectures (diff) | |
| download | kernel-qcow2-linux-6352e4d2dd9a349024a41356148eced553e1dce4.tar.gz kernel-qcow2-linux-6352e4d2dd9a349024a41356148eced553e1dce4.tar.xz kernel-qcow2-linux-6352e4d2dd9a349024a41356148eced553e1dce4.zip | |
KVM: s390: implement KVM_(S|G)ET_MP_STATE for user space state control
This patch
- adds s390 specific MP states to linux headers and documents them
- implements the KVM_{SET,GET}_MP_STATE ioctls
- enables KVM_CAP_MP_STATE
- allows user space to control the VCPU state on s390.
If user space sets the VCPU state using the ioctl KVM_SET_MP_STATE, we can disable
manual changing of the VCPU state and trust user space to do the right thing.
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390/kvm/kvm-s390.h')
| -rw-r--r-- | arch/s390/kvm/kvm-s390.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h index 77ed846342d4..33a0e4bed2a5 100644 --- a/arch/s390/kvm/kvm-s390.h +++ b/arch/s390/kvm/kvm-s390.h @@ -129,6 +129,12 @@ static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc) vcpu->arch.sie_block->gpsw.mask |= cc << 44; } +/* are cpu states controlled by user space */ +static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm) +{ + return kvm->arch.user_cpu_state_ctrl != 0; +} + int kvm_s390_handle_wait(struct kvm_vcpu *vcpu); enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer); void kvm_s390_tasklet(unsigned long parm); |