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KVM: MMU: move TLB flush out of __kvm_sync_page
By doing this, kvm_sync_pages can use __kvm_sync_page instead of reinventing it. Because of kvm_mmu_flush_or_zap, the code does not end up being more complex than before, and more cleanups to kvm_sync_pages will come in the next patches. Reviewed-by: Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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parent
b8c67b7a08
commit
35a70510ee
1 changed files with 24 additions and 29 deletions
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@ -1932,10 +1932,24 @@ static int __kvm_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
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return 1;
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}
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kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
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return 0;
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}
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static void kvm_mmu_flush_or_zap(struct kvm_vcpu *vcpu,
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struct list_head *invalid_list,
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bool remote_flush, bool local_flush)
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{
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if (!list_empty(invalid_list)) {
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kvm_mmu_commit_zap_page(vcpu->kvm, invalid_list);
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return;
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}
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if (remote_flush)
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kvm_flush_remote_tlbs(vcpu->kvm);
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else if (local_flush)
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kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
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}
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static int kvm_sync_page_transient(struct kvm_vcpu *vcpu,
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struct kvm_mmu_page *sp)
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{
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@ -1943,8 +1957,7 @@ static int kvm_sync_page_transient(struct kvm_vcpu *vcpu,
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int ret;
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ret = __kvm_sync_page(vcpu, sp, &invalid_list, false);
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if (ret)
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kvm_mmu_commit_zap_page(vcpu->kvm, &invalid_list);
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kvm_mmu_flush_or_zap(vcpu, &invalid_list, false, !ret);
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return ret;
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}
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@ -1975,17 +1988,11 @@ static void kvm_sync_pages(struct kvm_vcpu *vcpu, gfn_t gfn)
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WARN_ON(s->role.level != PT_PAGE_TABLE_LEVEL);
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kvm_unlink_unsync_page(vcpu->kvm, s);
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if ((s->role.cr4_pae != !!is_pae(vcpu)) ||
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(vcpu->arch.mmu.sync_page(vcpu, s))) {
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kvm_mmu_prepare_zap_page(vcpu->kvm, s, &invalid_list);
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continue;
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}
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flush = true;
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if (!__kvm_sync_page(vcpu, s, &invalid_list, false))
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flush = true;
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}
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kvm_mmu_commit_zap_page(vcpu->kvm, &invalid_list);
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if (flush)
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kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
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kvm_mmu_flush_or_zap(vcpu, &invalid_list, false, flush);
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}
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struct mmu_page_path {
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@ -2071,6 +2078,7 @@ static void mmu_sync_children(struct kvm_vcpu *vcpu,
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while (mmu_unsync_walk(parent, &pages)) {
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bool protected = false;
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bool flush = false;
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for_each_sp(pages, sp, parents, i)
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protected |= rmap_write_protect(vcpu, sp->gfn);
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@ -2079,10 +2087,12 @@ static void mmu_sync_children(struct kvm_vcpu *vcpu,
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kvm_flush_remote_tlbs(vcpu->kvm);
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for_each_sp(pages, sp, parents, i) {
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kvm_sync_page(vcpu, sp, &invalid_list);
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if (!kvm_sync_page(vcpu, sp, &invalid_list))
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flush = true;
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mmu_pages_clear_parents(&parents);
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}
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kvm_mmu_commit_zap_page(vcpu->kvm, &invalid_list);
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kvm_mmu_flush_or_zap(vcpu, &invalid_list, false, flush);
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cond_resched_lock(&vcpu->kvm->mmu_lock);
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}
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}
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@ -4188,21 +4198,6 @@ static bool need_remote_flush(u64 old, u64 new)
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return (old & ~new & PT64_PERM_MASK) != 0;
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}
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static void kvm_mmu_flush_or_zap(struct kvm_vcpu *vcpu,
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struct list_head *invalid_list,
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bool remote_flush, bool local_flush)
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{
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if (!list_empty(invalid_list)) {
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kvm_mmu_commit_zap_page(vcpu->kvm, invalid_list);
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return;
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}
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if (remote_flush)
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kvm_flush_remote_tlbs(vcpu->kvm);
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else if (local_flush)
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kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
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}
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static u64 mmu_pte_write_fetch_gpte(struct kvm_vcpu *vcpu, gpa_t *gpa,
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const u8 *new, int *bytes)
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{
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