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Two patches:

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- one regression fix for reducing the amount of ucontrol userspace exits
 - get rid of BUG_ONs in hot inner loops
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Merge tag 'kvm-s390-20140317' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD

Two patches:
- one regression fix for reducing the amount of ucontrol userspace exits
- get rid of BUG_ONs in hot inner loops
This commit is contained in:
Paolo Bonzini 2014-03-17 12:21:35 +01:00
commit 94b3ffcd41
2 changed files with 2 additions and 5 deletions
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2
arch/s390/kvm/interrupt.c
View File

@ -114,14 +114,12 @@ static int __interrupt_is_deliverable(struct kvm_vcpu *vcpu,
static void __set_cpu_idle(struct kvm_vcpu *vcpu)
{
BUG_ON(vcpu->vcpu_id > KVM_MAX_VCPUS - 1);
atomic_set_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
}
static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
{
BUG_ON(vcpu->vcpu_id > KVM_MAX_VCPUS - 1);
atomic_clear_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
}

5
arch/s390/kvm/kvm-s390.c
View File

@ -896,7 +896,8 @@ static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason)
if (rc == 0) {
if (kvm_is_ucontrol(vcpu->kvm))
rc = -EOPNOTSUPP;
/* Don't exit for host interrupts. */
rc = vcpu->arch.sie_block->icptcode ? -EOPNOTSUPP : 0;
else
rc = kvm_handle_sie_intercept(vcpu);
}
@ -949,8 +950,6 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
BUG_ON(kvm_get_vcpu(vcpu->kvm, vcpu->vcpu_id) == NULL);
switch (kvm_run->exit_reason) {
case KVM_EXIT_S390_SIEIC:
case KVM_EXIT_UNKNOWN: