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KVM: s390: introduce kvm_s390_vcpu_{start,stop}

Bladeren bron 
This patch introduces two new functions to set/clear the CPUSTAT_STOPPED bit and
makes use of it at all applicable places. These functions prepare the additional
execution of code when starting/stopping a vcpu.

The CPUSTAT_STOPPED bit should not be touched outside of these functions.

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
David Hildenbrand
2014-03-14 10:59:29 +01:00
gecommit door Christian Borntraeger
bovenliggende e45efa28e5
commit 6852d7b69b
6 gewijzigde bestanden met toevoegingen van 40 en 6 verwijderingen
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16
arch/s390/kvm/kvm-s390.c
Bestand weergeven

@@ -592,7 +592,7 @@ static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu)
vcpu->arch.sie_block->pp = 0;
vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
kvm_clear_async_pf_completion_queue(vcpu);
atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
kvm_s390_vcpu_stop(vcpu);
kvm_s390_clear_local_irqs(vcpu);
}
@@ -1235,7 +1235,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
if (vcpu->sigset_active)
sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
kvm_s390_vcpu_start(vcpu);
switch (kvm_run->exit_reason) {
case KVM_EXIT_S390_SIEIC:
@@ -1362,6 +1362,18 @@ int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
return kvm_s390_store_status_unloaded(vcpu, addr);
}
void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu)
{
trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1);
atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
}
void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu)
{
trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0);
atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
}
static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
struct kvm_enable_cap *cap)
{