From: Lai Jiangshan <jiangshan.ljs@xxxxxxxxxxxx>
Although there is no harm, but there is no point to clear write
flooding for direct SP.
Signed-off-by: Lai Jiangshan <jiangshan.ljs@xxxxxxxxxxxx>
---
arch/x86/kvm/mmu/paging_tmpl.h | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kvm/mmu/paging_tmpl.h b/arch/x86/kvm/mmu/paging_tmpl.h
index 79da423ee4cb..11f17efbec97 100644
--- a/arch/x86/kvm/mmu/paging_tmpl.h
+++ b/arch/x86/kvm/mmu/paging_tmpl.h
@@ -649,12 +649,12 @@ static int FNAME(fetch)(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault,
if (WARN_ON(!VALID_PAGE(vcpu->arch.mmu->root.hpa)))
goto out_gpte_changed;
- for (shadow_walk_init(&it, vcpu, fault->addr);
- shadow_walk_okay(&it) && it.level > gw->level;
- shadow_walk_next(&it)) {
+ for_each_shadow_entry(vcpu, fault->addr, it) {
gfn_t table_gfn;
clear_sp_write_flooding_count(it.sptep);
+ if (it.level == gw->level)
+ break;
table_gfn = gw->table_gfn[it.level - 2];
access = gw->pt_access[it.level - 2];
@@ -706,8 +706,6 @@ static int FNAME(fetch)(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault,
trace_kvm_mmu_spte_requested(fault);
for (; shadow_walk_okay(&it); shadow_walk_next(&it)) {
- clear_sp_write_flooding_count(it.sptep);
-
/*
* We cannot overwrite existing page tables with an NX
* large page, as the leaf could be executable.
--
2.19.1.6.gb485710b
