diff mbox series

[30/35] KVM: s390: protvirt: Support cmd 5 operation state

Message ID 20200207113958.7320-31-borntraeger@de.ibm.com (mailing list archive)
State New, archived
Headers show
Series KVM: s390: Add support for protected VMs | expand

Commit Message

Christian Borntraeger Feb. 7, 2020, 11:39 a.m. UTC 
From: Janosch Frank <frankja@linux.ibm.com>

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: Thomas Huth <thuth@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>
---
 arch/s390/include/asm/uv.h | 1 +
 arch/s390/kvm/kvm-s390.c   | 7 +++++++
 include/uapi/linux/kvm.h   | 1 +
 3 files changed, 9 insertions(+)
diff mbox series

Patch

diff --git a/arch/s390/include/asm/uv.h b/arch/s390/include/asm/uv.h
index 237d0b417d07..94fc0b60e4c8 100644
--- a/arch/s390/include/asm/uv.h
+++ b/arch/s390/include/asm/uv.h
@@ -175,6 +175,7 @@  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 ee98799212d3..3a06622c52fb 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -4667,6 +4667,13 @@  static int kvm_s390_handle_pv_vcpu(struct kvm_vcpu *vcpu,
 		r = kvm_s390_pv_destroy_cpu(vcpu);
 		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);
+		break;
+	}
 	default:
 		r = -ENOTTY;
 	}
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 864e73bd40e4..9125d6b2a974 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 {