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| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2015-04-14 13:17:34 +0300 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2015-05-08 16:51:15 +0300 |
| commit | 27406cd50cf6653196eea8ebbb15a75596da01ca (patch) | |
| tree | 371f3d79b9a1958a5714cd823b5e3b6f24397cd2 /arch/s390/kvm/kvm-s390.c | |
| parent | 8e23654687c97df1c0e4b1def245a05001eaf640 (diff) | |
| download | linux-27406cd50cf6653196eea8ebbb15a75596da01ca.tar.xz | |
KVM: s390: provide functions for blocking all CPUs
Some updates to the control blocks need to be done in a way that
ensures that no CPU is within SIE. Provide wrappers around the
s390_vcpu_block functions and adopt the TOD migration code to
update in a guaranteed fashion. Also rename these functions to
have the kvm_s390_ prefix as everything else.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Diffstat (limited to 'arch/s390/kvm/kvm-s390.c')
| -rw-r--r-- | arch/s390/kvm/kvm-s390.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 9bc57afe54ba..6bc69ab5b5b4 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -454,10 +454,10 @@ static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) mutex_lock(&kvm->lock); kvm->arch.epoch = gtod - host_tod; - kvm_for_each_vcpu(vcpu_idx, cur_vcpu, kvm) { + kvm_s390_vcpu_block_all(kvm); + kvm_for_each_vcpu(vcpu_idx, cur_vcpu, kvm) cur_vcpu->arch.sie_block->epoch = kvm->arch.epoch; - exit_sie(cur_vcpu); - } + kvm_s390_vcpu_unblock_all(kvm); mutex_unlock(&kvm->lock); return 0; } @@ -1414,12 +1414,12 @@ int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) return kvm_s390_vcpu_has_irq(vcpu, 0); } -void s390_vcpu_block(struct kvm_vcpu *vcpu) +void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu) { atomic_set_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); } -void s390_vcpu_unblock(struct kvm_vcpu *vcpu) +void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu) { atomic_clear_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); } |