KVM: Remove unused slot_bitmap from kvm_mmu_page

Not needed any more.

Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp>
Signed-off-by: Gleb Natapov <gleb@redhat.com>

2 files changed, 0 insertions, 15 deletions

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index c431b33271f3..f75e1feb6ec5 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -219,11 +219,6 @@ struct kvm_mmu_page {
         u64 *spt;
         /* hold the gfn of each spte inside spt */
         gfn_t *gfns;
-        /*
-         * One bit set per slot which has memory
-         * in this shadow page.
-         */
-        DECLARE_BITMAP(slot_bitmap, KVM_MEM_SLOTS_NUM);
         bool unsync;
         int root_count;          /* Currently serving as active root */
         unsigned int unsync_children;
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index aeb7666eb81e..9c1b2d6158bf 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1522,7 +1522,6 @@ static struct kvm_mmu_page *kvm_mmu_alloc_page(struct kvm_vcpu *vcpu,
                 sp->gfns = mmu_memory_cache_alloc(&vcpu->arch.mmu_page_cache);
         set_page_private(virt_to_page(sp->spt), (unsigned long)sp);
         list_add(&sp->link, &vcpu->kvm->arch.active_mmu_pages);
-        bitmap_zero(sp->slot_bitmap, KVM_MEM_SLOTS_NUM);
         sp->parent_ptes = 0;
         mmu_page_add_parent_pte(vcpu, sp, parent_pte);
         kvm_mod_used_mmu_pages(vcpu->kvm, +1);
@@ -2183,14 +2182,6 @@ int kvm_mmu_unprotect_page(struct kvm *kvm, gfn_t gfn)
 }
 EXPORT_SYMBOL_GPL(kvm_mmu_unprotect_page);
 
-static void page_header_update_slot(struct kvm *kvm, void *pte, gfn_t gfn)
-{
-        int slot = memslot_id(kvm, gfn);
-        struct kvm_mmu_page *sp = page_header(__pa(pte));
-
-        __set_bit(slot, sp->slot_bitmap);
-}
-
 /*
  * The function is based on mtrr_type_lookup() in
  * arch/x86/kernel/cpu/mtrr/generic.c
@@ -2472,7 +2463,6 @@ static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *sptep,
                 ++vcpu->kvm->stat.lpages;
 
         if (is_shadow_present_pte(*sptep)) {
-                page_header_update_slot(vcpu->kvm, sptep, gfn);
                 if (!was_rmapped) {
                         rmap_count = rmap_add(vcpu, sptep, gfn);
                         if (rmap_count > RMAP_RECYCLE_THRESHOLD)