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Commit 1ba15b24 authored by Christian Borntraeger's avatar Christian Borntraeger
Browse files

KVM: s390: fix ais handling vs cpu model 



If ais is disabled via cpumodel, we must act accordingly, even if
KVM_CAP_S390_AIS was enabled.

Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: default avatarPierre Morel <pmorel@linux.vnet.ibm.com>
Reviewed-by: default avatarYi Min Zhao <zyimin@linux.vnet.ibm.com>
Reviewed-by: default avatarHalil Pasic <pasic@linux.vnet.ibm.com>
Reviewed-by: default avatarEric Farman <farman@linux.vnet.ibm.com>
parent 55c315ee

arch/s390/include/asm/kvm_host.h

+0 −1
Original line number Diff line number Diff line
@@ -541,7 +541,6 @@ struct kvm_s390_float_interrupt { 
	struct mutex ais_lock;

	u8 simm;

	u8 nimm;

	int ais_enabled;

};



struct kvm_hw_wp_info_arch {

arch/s390/kvm/interrupt.c

+2 −2
Original line number Diff line number Diff line
@@ -2160,7 +2160,7 @@ static int modify_ais_mode(struct kvm *kvm, struct kvm_device_attr *attr) 
	struct kvm_s390_ais_req req;

	int ret = 0;



	if (!fi->ais_enabled)

	if (!test_kvm_facility(kvm, 72))

		return -ENOTSUPP;



	if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
@@ -2204,7 +2204,7 @@ static int kvm_s390_inject_airq(struct kvm *kvm, 
	};

	int ret = 0;



	if (!fi->ais_enabled || !adapter->suppressible)

	if (!test_kvm_facility(kvm, 72) || !adapter->suppressible)

		return kvm_s390_inject_vm(kvm, &s390int);



	mutex_lock(&fi->ais_lock);

arch/s390/kvm/kvm-s390.c

+0 −2
Original line number Diff line number Diff line
@@ -558,7 +558,6 @@ static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap) 
		} else {

			set_kvm_facility(kvm->arch.model.fac_mask, 72);

			set_kvm_facility(kvm->arch.model.fac_list, 72);

			kvm->arch.float_int.ais_enabled = 1;

			r = 0;

		}

		mutex_unlock(&kvm->lock);
@@ -1533,7 +1532,6 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) 
	mutex_init(&kvm->arch.float_int.ais_lock);

	kvm->arch.float_int.simm = 0;

	kvm->arch.float_int.nimm = 0;

	kvm->arch.float_int.ais_enabled = 0;

	spin_lock_init(&kvm->arch.float_int.lock);

	for (i = 0; i < FIRQ_LIST_COUNT; i++)

		INIT_LIST_HEAD(&kvm->arch.float_int.lists[i]);