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KVM: s390: protvirt: Support cmd 5 operation state 

Code 5 for the set cpu state UV call tells the UV to load a PSW from
the SE header (first IPL) or from guest location 0x0 (diag 308 subcode
0/1). Also it sets the cpu into operating state afterwards, so we can
start it.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
[borntraeger@de.ibm.com: patch merging, splitting, fixing]
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Janosch Frank 2019-09-02 08:34:44 +02:00 committed by Christian Borntraeger
parent fe28c7868f
commit 7c36a3fcf4
2 changed files with 7 additions and 0 deletions
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1
arch/s390/include/asm/uv.h
View File

@ -169,6 +169,7 @@ struct uv_cb_unp {
#define PV_CPU_STATE_OPR 1
#define PV_CPU_STATE_STP 2
#define PV_CPU_STATE_CHKSTP 3
#define PV_CPU_STATE_OPR_LOAD 5
struct uv_cb_cpu_set_state {
struct uv_cb_header header;

6
arch/s390/kvm/kvm-s390.c
View File

@ -3736,6 +3736,12 @@ int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
rc = kvm_s390_vcpu_start(vcpu);
break;
case KVM_MP_STATE_LOAD:
if (!kvm_s390_pv_cpu_is_protected(vcpu)) {
rc = -ENXIO;
break;
}
rc = kvm_s390_pv_set_cpu_state(vcpu, PV_CPU_STATE_OPR_LOAD);
break;
case KVM_MP_STATE_CHECK_STOP:
/* fall through - CHECK_STOP and LOAD are not supported yet */
default: