KVM: MMU: speed up mmu_unsync_walk
Cache the unsynced children information in a per-page bitmap.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/include/asm-x86/kvm_host.h b/include/asm-x86/kvm_host.h
index 7d36fcc..0992d72 100644
--- a/include/asm-x86/kvm_host.h
+++ b/include/asm-x86/kvm_host.h
@@ -201,6 +201,7 @@
u64 *parent_pte; /* !multimapped */
struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
};
+ DECLARE_BITMAP(unsync_child_bitmap, 512);
};
struct kvm_pv_mmu_op_buffer {
