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KVM: Convert vm lock to a mutex

Browse Source 
This allows the kvm mmu to perform sleepy operations, such as memory
allocation.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Shaohua Li
2007-07-23 14:51:37 +08:00
committed by Avi Kivity
parent 15ad71460d
commit 11ec280471
5 changed files with 46 additions and 50 deletions
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drivers/kvm/mmu.c
+4 -5
View File
@@ -275,10 +275,9 @@ static int mmu_topup_memory_caches(struct kvm_vcpu *vcpu)
r = __mmu_topup_memory_caches(vcpu, GFP_NOWAIT);
kvm_mmu_free_some_pages(vcpu);
if (r < 0) {
spin_unlock(&vcpu->kvm->lock);
mutex_unlock(&vcpu->kvm->lock);
r = __mmu_topup_memory_caches(vcpu, GFP_KERNEL);
spin_lock(&vcpu->kvm->lock);
kvm_mmu_free_some_pages(vcpu);
mutex_lock(&vcpu->kvm->lock);
}
return r;
}
@@ -1069,7 +1068,7 @@ int kvm_mmu_load(struct kvm_vcpu *vcpu)
{
int r;
spin_lock(&vcpu->kvm->lock);
mutex_lock(&vcpu->kvm->lock);
r = mmu_topup_memory_caches(vcpu);
if (r)
goto out;
@@ -1077,7 +1076,7 @@ int kvm_mmu_load(struct kvm_vcpu *vcpu)
kvm_arch_ops->set_cr3(vcpu, vcpu->mmu.root_hpa);
kvm_mmu_flush_tlb(vcpu);
out:
spin_unlock(&vcpu->kvm->lock);
mutex_unlock(&vcpu->kvm->lock);
return r;
}
EXPORT_SYMBOL_GPL(kvm_mmu_load);