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Thread-Topic: [PATCH V2 3/13] KVM: Replace old tlb flush function with new one to flush a specified range. 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Signed-off-by: Lan Tianyu --- arch/x86/kvm/mmu.c | 33 ++++++++++++++++++++++----------- arch/x86/kvm/paging_tmpl.h | 3 ++- 2 files changed, 24 insertions(+), 12 deletions(-) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index ac3b748f58f8..822e170881a4 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -1482,8 +1482,12 @@ static bool __drop_large_spte(struct kvm *kvm, u64 *= sptep) =20 static void drop_large_spte(struct kvm_vcpu *vcpu, u64 *sptep) { - if (__drop_large_spte(vcpu->kvm, sptep)) - kvm_flush_remote_tlbs(vcpu->kvm); + if (__drop_large_spte(vcpu->kvm, sptep)) { + struct kvm_mmu_page *sp =3D page_header(__pa(sptep)); + + kvm_flush_remote_tlbs_with_address(vcpu->kvm, sp->gfn, + KVM_PAGES_PER_HPAGE(sp->role.level)); + } } =20 /* @@ -1770,7 +1774,7 @@ static int kvm_set_pte_rmapp(struct kvm *kvm, struct = kvm_rmap_head *rmap_head, } =20 if (need_flush) - kvm_flush_remote_tlbs(kvm); + kvm_flush_remote_tlbs_with_address(kvm, gfn, 1); =20 return 0; } @@ -1951,7 +1955,8 @@ static void rmap_recycle(struct kvm_vcpu *vcpu, u64 *= spte, gfn_t gfn) rmap_head =3D gfn_to_rmap(vcpu->kvm, gfn, sp); =20 kvm_unmap_rmapp(vcpu->kvm, rmap_head, NULL, gfn, sp->role.level, 0); - kvm_flush_remote_tlbs(vcpu->kvm); + kvm_flush_remote_tlbs_with_address(vcpu->kvm, sp->gfn, + KVM_PAGES_PER_HPAGE(sp->role.level)); } =20 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end) @@ -2467,7 +2472,7 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct k= vm_vcpu *vcpu, account_shadowed(vcpu->kvm, sp); if (level =3D=3D PT_PAGE_TABLE_LEVEL && rmap_write_protect(vcpu, gfn)) - kvm_flush_remote_tlbs(vcpu->kvm); + kvm_flush_remote_tlbs_with_address(vcpu->kvm, gfn, 1); =20 if (level > PT_PAGE_TABLE_LEVEL && need_sync) flush |=3D kvm_sync_pages(vcpu, gfn, &invalid_list); @@ -2587,7 +2592,7 @@ static void validate_direct_spte(struct kvm_vcpu *vcp= u, u64 *sptep, return; =20 drop_parent_pte(child, sptep); - kvm_flush_remote_tlbs(vcpu->kvm); + kvm_flush_remote_tlbs_with_address(vcpu->kvm, child->gfn, 1); } } =20 @@ -3011,8 +3016,10 @@ static int mmu_set_spte(struct kvm_vcpu *vcpu, u64 *= sptep, unsigned pte_access, ret =3D RET_PF_EMULATE; kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); } + if (set_spte_ret & SET_SPTE_NEED_REMOTE_TLB_FLUSH || flush) - kvm_flush_remote_tlbs(vcpu->kvm); + kvm_flush_remote_tlbs_with_address(vcpu->kvm, gfn, + KVM_PAGES_PER_HPAGE(level)); =20 if (unlikely(is_mmio_spte(*sptep))) ret =3D RET_PF_EMULATE; @@ -5621,7 +5628,8 @@ void kvm_mmu_slot_remove_write_access(struct kvm *kvm= , * on PT_WRITABLE_MASK anymore. */ if (flush) - kvm_flush_remote_tlbs(kvm); + kvm_flush_remote_tlbs_with_address(kvm, memslot->base_gfn, + memslot->npages); } =20 static bool kvm_mmu_zap_collapsible_spte(struct kvm *kvm, @@ -5685,7 +5693,8 @@ void kvm_mmu_slot_leaf_clear_dirty(struct kvm *kvm, * dirty_bitmap. */ if (flush) - kvm_flush_remote_tlbs(kvm); + kvm_flush_remote_tlbs_with_address(kvm, memslot->base_gfn, + memslot->npages); } EXPORT_SYMBOL_GPL(kvm_mmu_slot_leaf_clear_dirty); =20 @@ -5703,7 +5712,8 @@ void kvm_mmu_slot_largepage_remove_write_access(struc= t kvm *kvm, lockdep_assert_held(&kvm->slots_lock); =20 if (flush) - kvm_flush_remote_tlbs(kvm); + kvm_flush_remote_tlbs_with_address(kvm, memslot->base_gfn, + memslot->npages); } EXPORT_SYMBOL_GPL(kvm_mmu_slot_largepage_remove_write_access); =20 @@ -5720,7 +5730,8 @@ void kvm_mmu_slot_set_dirty(struct kvm *kvm, =20 /* see kvm_mmu_slot_leaf_clear_dirty */ if (flush) - kvm_flush_remote_tlbs(kvm); + kvm_flush_remote_tlbs_with_address(kvm, memslot->base_gfn, + memslot->npages); } EXPORT_SYMBOL_GPL(kvm_mmu_slot_set_dirty); =20 diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index 14ffd973df54..708a5e44861a 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -893,7 +893,8 @@ static void FNAME(invlpg)(struct kvm_vcpu *vcpu, gva_t = gva, hpa_t root_hpa) pte_gpa +=3D (sptep - sp->spt) * sizeof(pt_element_t); =20 if (mmu_page_zap_pte(vcpu->kvm, sp, sptep)) - kvm_flush_remote_tlbs(vcpu->kvm); + kvm_flush_remote_tlbs_with_address(vcpu->kvm, + sp->gfn, KVM_PAGES_PER_HPAGE(sp->role.level)); =20 if (!rmap_can_add(vcpu)) break; --=20 2.14.4