On Fri, 15 Mar 2013 23:29:53 +0800
Xiao Guangrong <xiaoguangr...@linux.vnet.ibm.com> wrote:
> +/*
> + * The caller should protect concurrent access on
> + * kvm->arch.mmio_invalid_gen. Currently, it is used by
> + * kvm_arch_commit_memory_region and protected by kvm->slots_lock.
> + */
> +void kvm_mmu_invalid_mmio_spte(struct kvm *kvm)
kvm_mmu_invalidate_mmio_sptes() may be a better name.
Thanks,
Takuya
> +{
> + /* Ensure update memslot has been completed. */
> + smp_mb();
> +
> + trace_kvm_mmu_invalid_mmio_spte(kvm);
> +
> + /*
> + * The very rare case: if the generation-number is round,
> + * zap all shadow pages.
> + */
> + if (unlikely(kvm->arch.mmio_invalid_gen++ == MAX_GEN)) {
> + kvm->arch.mmio_invalid_gen = 0;
> + return kvm_mmu_zap_all(kvm);
> + }
> +}
> +
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