提交 f285c633 编写于 作者: B Ben Gardon 提交者: Paolo Bonzini

kvm: mmu: Used range based flushing in slot_handle_level_range

Replace kvm_flush_remote_tlbs with kvm_flush_remote_tlbs_with_address
in slot_handle_level_range. When range based flushes are not enabled
kvm_flush_remote_tlbs_with_address falls back to kvm_flush_remote_tlbs.

This changes the behavior of many functions that indirectly use
slot_handle_level_range, iff the range based flushes are enabled. The
only potential problem I see with this is that kvm->tlbs_dirty will be
cleared less often, however the only caller of slot_handle_level_range that
checks tlbs_dirty is kvm_mmu_notifier_invalidate_range_start which
checks it and does a kvm_flush_remote_tlbs after calling
kvm_unmap_hva_range anyway.

Tested: Ran all kvm-unit-tests on a Intel Haswell machine with and
	without this patch. The patch introduced no new failures.
Signed-off-by: NBen Gardon <bgardon@google.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
上级 3d9683cf
...@@ -5526,7 +5526,9 @@ slot_handle_level_range(struct kvm *kvm, struct kvm_memory_slot *memslot, ...@@ -5526,7 +5526,9 @@ slot_handle_level_range(struct kvm *kvm, struct kvm_memory_slot *memslot,
if (need_resched() || spin_needbreak(&kvm->mmu_lock)) { if (need_resched() || spin_needbreak(&kvm->mmu_lock)) {
if (flush && lock_flush_tlb) { if (flush && lock_flush_tlb) {
kvm_flush_remote_tlbs(kvm); kvm_flush_remote_tlbs_with_address(kvm,
start_gfn,
iterator.gfn - start_gfn + 1);
flush = false; flush = false;
} }
cond_resched_lock(&kvm->mmu_lock); cond_resched_lock(&kvm->mmu_lock);
...@@ -5534,7 +5536,8 @@ slot_handle_level_range(struct kvm *kvm, struct kvm_memory_slot *memslot, ...@@ -5534,7 +5536,8 @@ slot_handle_level_range(struct kvm *kvm, struct kvm_memory_slot *memslot,
} }
if (flush && lock_flush_tlb) { if (flush && lock_flush_tlb) {
kvm_flush_remote_tlbs(kvm); kvm_flush_remote_tlbs_with_address(kvm, start_gfn,
end_gfn - start_gfn + 1);
flush = false; flush = false;
} }
......
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