From: Janosch Frank <frankja@xxxxxxxxxxxxx>
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@xxxxxxxxxxxxx>
Reviewed-by: Thomas Huth <thuth@xxxxxxxxxx>
Reviewed-by: Cornelia Huck <cohuck@xxxxxxxxxx>
[borntraeger@xxxxxxxxxx: patch merging, splitting, fixing]
Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
---
arch/s390/include/asm/uv.h | 1 +
arch/s390/kvm/kvm-s390.c | 6 ++++++
2 files changed, 7 insertions(+)
diff --git a/arch/s390/include/asm/uv.h b/arch/s390/include/asm/uv.h
index 99e1a14ef909..4945e44e1528 100644
--- a/arch/s390/include/asm/uv.h
+++ b/arch/s390/include/asm/uv.h
@@ -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;
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index f10cce6fc5e0..9c0ab66128fd 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -3728,6 +3728,12 @@ 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:
--
2.25.0
