[PATCH v2 32/42] KVM: s390: protvirt: Support cmd 5 operation state

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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




[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Kernel Development]     [Kernel Newbies]     [IDE]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite Info]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux ATA RAID]     [Samba]     [Linux Media]     [Device Mapper]

  Powered by Linux