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 | 8 ++++++++
include/uapi/linux/kvm.h | 1 +
3 files changed, 10 insertions(+)
diff --git a/arch/s390/include/asm/uv.h b/arch/s390/include/asm/uv.h
index 7b82881ec3b4..d59825d95b9d 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 5426b01e3da1..b6113285f47f 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -4656,6 +4656,14 @@ static int kvm_s390_handle_pv_vcpu(struct kvm_vcpu *vcpu,
r = kvm_s390_pv_destroy_cpu(vcpu, &cmd->rc, &cmd->rrc);
break;
}
+ case KVM_PV_VCPU_SET_IPL_PSW: {
+ if (!kvm_s390_pv_handle_cpu(vcpu))
+ return -EINVAL;
+
+ r = kvm_s390_pv_set_cpu_state(vcpu, PV_CPU_STATE_OPR_LOAD,
+ &cmd->rc, &cmd->rrc);
+ break;
+ }
default:
r = -ENOTTY;
}
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index b6ab4ad21b60..887ecb3dbc79 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -1504,6 +1504,7 @@ enum pv_cmd_id {
KVM_PV_VM_UNSHARE_ALL,
KVM_PV_VCPU_CREATE,
KVM_PV_VCPU_DESTROY,
+ KVM_PV_VCPU_SET_IPL_PSW,
};
struct kvm_pv_cmd {
--
2.25.0
