diff options
Diffstat (limited to 'arch/x86/kvm/mmu/tdp_mmu.c')
| -rw-r--r-- | arch/x86/kvm/mmu/tdp_mmu.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c index d80cb122b5f3..0a1fa42d03aa 100644 --- a/arch/x86/kvm/mmu/tdp_mmu.c +++ b/arch/x86/kvm/mmu/tdp_mmu.c @@ -412,6 +412,7 @@ static void __handle_changed_spte(struct kvm *kvm, int as_id, gfn_t gfn, bool was_leaf = was_present && is_last_spte(old_spte, level); bool is_leaf = is_present && is_last_spte(new_spte, level); bool pfn_changed = spte_to_pfn(old_spte) != spte_to_pfn(new_spte); + bool was_large, is_large; WARN_ON(level > PT64_ROOT_MAX_LEVEL); WARN_ON(level < PG_LEVEL_4K); @@ -445,13 +446,6 @@ static void __handle_changed_spte(struct kvm *kvm, int as_id, gfn_t gfn, trace_kvm_tdp_mmu_spte_changed(as_id, gfn, level, old_spte, new_spte); - if (is_large_pte(old_spte) != is_large_pte(new_spte)) { - if (is_large_pte(old_spte)) - atomic64_sub(1, (atomic64_t*)&kvm->stat.lpages); - else - atomic64_add(1, (atomic64_t*)&kvm->stat.lpages); - } - /* * The only times a SPTE should be changed from a non-present to * non-present state is when an MMIO entry is installed/modified/ @@ -477,6 +471,18 @@ static void __handle_changed_spte(struct kvm *kvm, int as_id, gfn_t gfn, return; } + /* + * Update large page stats if a large page is being zapped, created, or + * is replacing an existing shadow page. + */ + was_large = was_leaf && is_large_pte(old_spte); + is_large = is_leaf && is_large_pte(new_spte); + if (was_large != is_large) { + if (was_large) + atomic64_sub(1, (atomic64_t *)&kvm->stat.lpages); + else + atomic64_add(1, (atomic64_t *)&kvm->stat.lpages); + } if (was_leaf && is_dirty_spte(old_spte) && (!is_present || !is_dirty_spte(new_spte) || pfn_changed)) |