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KVM: MMU: Topup the mmu memory preallocation caches before emulating an insn

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Emulation may cause a shadow pte to be instantiated, which requires
memory resources.  Make sure the caches are filled to avoid an oops.

Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Avi Kivity 2007-10-28 18:52:05 +02:00
parent 3067714cf5
commit b733bfb524
1 changed files with 4 additions and 0 deletions
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4
drivers/kvm/mmu.c
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@ -1362,6 +1362,10 @@ int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t cr2, u32 error_code)
goto out;
}
r = mmu_topup_memory_caches(vcpu);
if (r)
goto out;
er = emulate_instruction(vcpu, vcpu->run, cr2, error_code, 0);
mutex_unlock(&vcpu->kvm->lock);