Messages in this thread Patch in this message | | | From | Lai Jiangshan <> | Subject | [PATCH] kvm: x86/mmu: Don't clear write flooding for direct SP | Date | Thu, 5 Jan 2023 18:03:10 +0800 |
| |
From: Lai Jiangshan <jiangshan.ljs@antgroup.com>
Although there is no harm, but there is no point to clear write flooding for direct SP.
Signed-off-by: Lai Jiangshan <jiangshan.ljs@antgroup.com> --- 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
| |