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KVM: s390: always set/clear the SCA sda field

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Let's always set and clear the sda when enabling/disabling a VCPU.
Dealing with sda being set to something else makes no sense anymore
as we enable a VCPU in the SCA now after it has been registered at
the VM.

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
David Hildenbrand 2015-10-12 12:41:41 +02:00 committed by Christian Borntraeger
parent 2550882449
commit 10ce32d5b0
1 changed files with 4 additions and 8 deletions
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12
arch/s390/kvm/kvm-s390.c
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@ -1266,14 +1266,12 @@ static void sca_del_vcpu(struct kvm_vcpu *vcpu)
struct esca_block *sca = vcpu->kvm->arch.sca;
clear_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn);
if (sca->cpu[vcpu->vcpu_id].sda == (__u64) vcpu->arch.sie_block)
sca->cpu[vcpu->vcpu_id].sda = 0;
sca->cpu[vcpu->vcpu_id].sda = 0;
} else {
struct bsca_block *sca = vcpu->kvm->arch.sca;
clear_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn);
if (sca->cpu[vcpu->vcpu_id].sda == (__u64) vcpu->arch.sie_block)
sca->cpu[vcpu->vcpu_id].sda = 0;
sca->cpu[vcpu->vcpu_id].sda = 0;
}
read_unlock(&vcpu->kvm->arch.sca_lock);
}
@ -1285,8 +1283,7 @@ static void sca_add_vcpu(struct kvm_vcpu *vcpu, struct kvm *kvm,
if (kvm->arch.use_esca) {
struct esca_block *sca = kvm->arch.sca;
if (!sca->cpu[id].sda)
sca->cpu[id].sda = (__u64) vcpu->arch.sie_block;
sca->cpu[id].sda = (__u64) vcpu->arch.sie_block;
vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
vcpu->arch.sie_block->scaol = (__u32)(__u64)sca & ~0x3fU;
vcpu->arch.sie_block->ecb2 |= 0x04U;
@ -1294,8 +1291,7 @@ static void sca_add_vcpu(struct kvm_vcpu *vcpu, struct kvm *kvm,
} else {
struct bsca_block *sca = kvm->arch.sca;
if (!sca->cpu[id].sda)
sca->cpu[id].sda = (__u64) vcpu->arch.sie_block;
sca->cpu[id].sda = (__u64) vcpu->arch.sie_block;
vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
vcpu->arch.sie_block->scaol = (__u32)(__u64)sca;
set_bit_inv(id, (unsigned long *) &sca->mcn);