KVM: s390: protvirt: Add initial vm and cpu lifecycle handling

This contains 3 main changes:
1. changes in SIE control block handling for secure guests
2. helper functions for create/destroy/unpack secure guests
3. KVM_S390_PV_COMMAND ioctl to allow userspace dealing with secure
machines

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>

1 files changed, 33 insertions, 0 deletions

diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h
index be55b4b99bd3..13e6986596ed 100644
--- a/arch/s390/kvm/kvm-s390.h
+++ b/arch/s390/kvm/kvm-s390.h
@@ -15,6 +15,7 @@
 #include <linux/hrtimer.h>
 #include <linux/kvm.h>
 #include <linux/kvm_host.h>
+#include <linux/lockdep.h>
 #include <asm/facility.h>
 #include <asm/processor.h>
 #include <asm/sclp.h>
@@ -207,6 +208,38 @@ static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm)
 	return kvm->arch.user_cpu_state_ctrl != 0;
 }
 
+/* implemented in pv.c */
+int kvm_s390_pv_destroy_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc);
+int kvm_s390_pv_create_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc);
+int kvm_s390_pv_deinit_vm(struct kvm *kvm, u16 *rc, u16 *rrc);
+int kvm_s390_pv_init_vm(struct kvm *kvm, u16 *rc, u16 *rrc);
+int kvm_s390_pv_set_sec_parms(struct kvm *kvm, void *hdr, u64 length, u16 *rc,
+			      u16 *rrc);
+int kvm_s390_pv_unpack(struct kvm *kvm, unsigned long addr, unsigned long size,
+		       unsigned long tweak, u16 *rc, u16 *rrc);
+
+static inline u64 kvm_s390_pv_get_handle(struct kvm *kvm)
+{
+	return kvm->arch.pv.handle;
+}
+
+static inline u64 kvm_s390_pv_cpu_get_handle(struct kvm_vcpu *vcpu)
+{
+	return vcpu->arch.pv.handle;
+}
+
+static inline bool kvm_s390_pv_is_protected(struct kvm *kvm)
+{
+	lockdep_assert_held(&kvm->lock);
+	return !!kvm_s390_pv_get_handle(kvm);
+}
+
+static inline bool kvm_s390_pv_cpu_is_protected(struct kvm_vcpu *vcpu)
+{
+	lockdep_assert_held(&vcpu->mutex);
+	return !!kvm_s390_pv_cpu_get_handle(vcpu);
+}
+
 /* implemented in interrupt.c */
 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
 void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu);