KVM: arm64: Remove unused page-table code

Now that KVM is using the generic page-table code to manage the guest
stage-2 page-tables, we can remove a bunch of unused macros, #defines
and static inline functions from the old implementation.

Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Quentin Perret <qperret@google.com>
Link: https://lore.kernel.org/r/20200911132529.19844-20-will@kernel.org

1 files changed, 0 insertions, 755 deletions

diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index ed5aefd5d0a7..dd0ea7d8065a 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -31,13 +31,6 @@ static phys_addr_t hyp_idmap_vector;
 
 static unsigned long io_map_base;
 
-#define KVM_S2PTE_FLAG_IS_IOMAP		(1UL << 0)
-#define KVM_S2_FLAG_LOGGING_ACTIVE	(1UL << 1)
-
-static bool is_iomap(unsigned long flags)
-{
-	return flags & KVM_S2PTE_FLAG_IS_IOMAP;
-}
 
 /*
  * Release kvm_mmu_lock periodically if the memory region is large. Otherwise,
@@ -90,154 +83,11 @@ void kvm_flush_remote_tlbs(struct kvm *kvm)
 	kvm_call_hyp(__kvm_tlb_flush_vmid, &kvm->arch.mmu);
 }
 
-static void kvm_tlb_flush_vmid_ipa(struct kvm_s2_mmu *mmu, phys_addr_t ipa,
-				   int level)
-{
-	kvm_call_hyp(__kvm_tlb_flush_vmid_ipa, mmu, ipa, level);
-}
-
-/*
- * D-Cache management functions. They take the page table entries by
- * value, as they are flushing the cache using the kernel mapping (or
- * kmap on 32bit).
- */
-static void kvm_flush_dcache_pte(pte_t pte)
-{
-	__kvm_flush_dcache_pte(pte);
-}
-
-static void kvm_flush_dcache_pmd(pmd_t pmd)
-{
-	__kvm_flush_dcache_pmd(pmd);
-}
-
-static void kvm_flush_dcache_pud(pud_t pud)
-{
-	__kvm_flush_dcache_pud(pud);
-}
-
 static bool kvm_is_device_pfn(unsigned long pfn)
 {
 	return !pfn_valid(pfn);
 }
 
-/**
- * stage2_dissolve_pmd() - clear and flush huge PMD entry
- * @mmu:	pointer to mmu structure to operate on
- * @addr:	IPA
- * @pmd:	pmd pointer for IPA
- *
- * Function clears a PMD entry, flushes addr 1st and 2nd stage TLBs.
- */
-static void stage2_dissolve_pmd(struct kvm_s2_mmu *mmu, phys_addr_t addr, pmd_t *pmd)
-{
-	if (!pmd_thp_or_huge(*pmd))
-		return;
-
-	pmd_clear(pmd);
-	kvm_tlb_flush_vmid_ipa(mmu, addr, S2_PMD_LEVEL);
-	put_page(virt_to_page(pmd));
-}
-
-/**
- * stage2_dissolve_pud() - clear and flush huge PUD entry
- * @mmu:	pointer to mmu structure to operate on
- * @addr:	IPA
- * @pud:	pud pointer for IPA
- *
- * Function clears a PUD entry, flushes addr 1st and 2nd stage TLBs.
- */
-static void stage2_dissolve_pud(struct kvm_s2_mmu *mmu, phys_addr_t addr, pud_t *pudp)
-{
-	struct kvm *kvm = mmu->kvm;
-
-	if (!stage2_pud_huge(kvm, *pudp))
-		return;
-
-	stage2_pud_clear(kvm, pudp);
-	kvm_tlb_flush_vmid_ipa(mmu, addr, S2_PUD_LEVEL);
-	put_page(virt_to_page(pudp));
-}
-
-static void clear_stage2_pgd_entry(struct kvm_s2_mmu *mmu, pgd_t *pgd, phys_addr_t addr)
-{
-	struct kvm *kvm = mmu->kvm;
-	p4d_t *p4d_table __maybe_unused = stage2_p4d_offset(kvm, pgd, 0UL);
-	stage2_pgd_clear(kvm, pgd);
-	kvm_tlb_flush_vmid_ipa(mmu, addr, S2_NO_LEVEL_HINT);
-	stage2_p4d_free(kvm, p4d_table);
-	put_page(virt_to_page(pgd));
-}
-
-static void clear_stage2_p4d_entry(struct kvm_s2_mmu *mmu, p4d_t *p4d, phys_addr_t addr)
-{
-	struct kvm *kvm = mmu->kvm;
-	pud_t *pud_table __maybe_unused = stage2_pud_offset(kvm, p4d, 0);
-	stage2_p4d_clear(kvm, p4d);
-	kvm_tlb_flush_vmid_ipa(mmu, addr, S2_NO_LEVEL_HINT);
-	stage2_pud_free(kvm, pud_table);
-	put_page(virt_to_page(p4d));
-}
-
-static void clear_stage2_pud_entry(struct kvm_s2_mmu *mmu, pud_t *pud, phys_addr_t addr)
-{
-	struct kvm *kvm = mmu->kvm;
-	pmd_t *pmd_table __maybe_unused = stage2_pmd_offset(kvm, pud, 0);
-
-	VM_BUG_ON(stage2_pud_huge(kvm, *pud));
-	stage2_pud_clear(kvm, pud);
-	kvm_tlb_flush_vmid_ipa(mmu, addr, S2_NO_LEVEL_HINT);
-	stage2_pmd_free(kvm, pmd_table);
-	put_page(virt_to_page(pud));
-}
-
-static void clear_stage2_pmd_entry(struct kvm_s2_mmu *mmu, pmd_t *pmd, phys_addr_t addr)
-{
-	pte_t *pte_table = pte_offset_kernel(pmd, 0);
-	VM_BUG_ON(pmd_thp_or_huge(*pmd));
-	pmd_clear(pmd);
-	kvm_tlb_flush_vmid_ipa(mmu, addr, S2_NO_LEVEL_HINT);
-	free_page((unsigned long)pte_table);
-	put_page(virt_to_page(pmd));
-}
-
-static inline void kvm_set_pte(pte_t *ptep, pte_t new_pte)
-{
-	WRITE_ONCE(*ptep, new_pte);
-	dsb(ishst);
-}
-
-static inline void kvm_set_pmd(pmd_t *pmdp, pmd_t new_pmd)
-{
-	WRITE_ONCE(*pmdp, new_pmd);
-	dsb(ishst);
-}
-
-static inline void kvm_pmd_populate(pmd_t *pmdp, pte_t *ptep)
-{
-	kvm_set_pmd(pmdp, kvm_mk_pmd(ptep));
-}
-
-static inline void kvm_pud_populate(pud_t *pudp, pmd_t *pmdp)
-{
-	WRITE_ONCE(*pudp, kvm_mk_pud(pmdp));
-	dsb(ishst);
-}
-
-static inline void kvm_p4d_populate(p4d_t *p4dp, pud_t *pudp)
-{
-	WRITE_ONCE(*p4dp, kvm_mk_p4d(pudp));
-	dsb(ishst);
-}
-
-static inline void kvm_pgd_populate(pgd_t *pgdp, p4d_t *p4dp)
-{
-#ifndef __PAGETABLE_P4D_FOLDED
-	WRITE_ONCE(*pgdp, kvm_mk_pgd(p4dp));
-	dsb(ishst);
-#endif
-}
-
 /*
  * Unmapping vs dcache management:
  *
@@ -262,108 +112,6 @@ static inline void kvm_pgd_populate(pgd_t *pgdp, p4d_t *p4dp)
  * we then fully enforce cacheability of RAM, no matter what the guest
  * does.
  */
-static void unmap_stage2_ptes(struct kvm_s2_mmu *mmu, pmd_t *pmd,
-		       phys_addr_t addr, phys_addr_t end)
-{
-	phys_addr_t start_addr = addr;
-	pte_t *pte, *start_pte;
-
-	start_pte = pte = pte_offset_kernel(pmd, addr);
-	do {
-		if (!pte_none(*pte)) {
-			pte_t old_pte = *pte;
-
-			kvm_set_pte(pte, __pte(0));
-			kvm_tlb_flush_vmid_ipa(mmu, addr, S2_PTE_LEVEL);
-
-			/* No need to invalidate the cache for device mappings */
-			if (!kvm_is_device_pfn(pte_pfn(old_pte)))
-				kvm_flush_dcache_pte(old_pte);
-
-			put_page(virt_to_page(pte));
-		}
-	} while (pte++, addr += PAGE_SIZE, addr != end);
-
-	if (stage2_pte_table_empty(mmu->kvm, start_pte))
-		clear_stage2_pmd_entry(mmu, pmd, start_addr);
-}
-
-static void unmap_stage2_pmds(struct kvm_s2_mmu *mmu, pud_t *pud,
-		       phys_addr_t addr, phys_addr_t end)
-{
-	struct kvm *kvm = mmu->kvm;
-	phys_addr_t next, start_addr = addr;
-	pmd_t *pmd, *start_pmd;
-
-	start_pmd = pmd = stage2_pmd_offset(kvm, pud, addr);
-	do {
-		next = stage2_pmd_addr_end(kvm, addr, end);
-		if (!pmd_none(*pmd)) {
-			if (pmd_thp_or_huge(*pmd)) {
-				pmd_t old_pmd = *pmd;
-
-				pmd_clear(pmd);
-				kvm_tlb_flush_vmid_ipa(mmu, addr, S2_PMD_LEVEL);
-
-				kvm_flush_dcache_pmd(old_pmd);
-
-				put_page(virt_to_page(pmd));
-			} else {
-				unmap_stage2_ptes(mmu, pmd, addr, next);
-			}
-		}
-	} while (pmd++, addr = next, addr != end);
-
-	if (stage2_pmd_table_empty(kvm, start_pmd))
-		clear_stage2_pud_entry(mmu, pud, start_addr);
-}
-
-static void unmap_stage2_puds(struct kvm_s2_mmu *mmu, p4d_t *p4d,
-		       phys_addr_t addr, phys_addr_t end)
-{
-	struct kvm *kvm = mmu->kvm;
-	phys_addr_t next, start_addr = addr;
-	pud_t *pud, *start_pud;
-
-	start_pud = pud = stage2_pud_offset(kvm, p4d, addr);
-	do {
-		next = stage2_pud_addr_end(kvm, addr, end);
-		if (!stage2_pud_none(kvm, *pud)) {
-			if (stage2_pud_huge(kvm, *pud)) {
-				pud_t old_pud = *pud;
-
-				stage2_pud_clear(kvm, pud);
-				kvm_tlb_flush_vmid_ipa(mmu, addr, S2_PUD_LEVEL);
-				kvm_flush_dcache_pud(old_pud);
-				put_page(virt_to_page(pud));
-			} else {
-				unmap_stage2_pmds(mmu, pud, addr, next);
-			}
-		}
-	} while (pud++, addr = next, addr != end);
-
-	if (stage2_pud_table_empty(kvm, start_pud))
-		clear_stage2_p4d_entry(mmu, p4d, start_addr);
-}
-
-static void unmap_stage2_p4ds(struct kvm_s2_mmu *mmu, pgd_t *pgd,
-		       phys_addr_t addr, phys_addr_t end)
-{
-	struct kvm *kvm = mmu->kvm;
-	phys_addr_t next, start_addr = addr;
-	p4d_t *p4d, *start_p4d;
-
-	start_p4d = p4d = stage2_p4d_offset(kvm, pgd, addr);
-	do {
-		next = stage2_p4d_addr_end(kvm, addr, end);
-		if (!stage2_p4d_none(kvm, *p4d))
-			unmap_stage2_puds(mmu, p4d, addr, next);
-	} while (p4d++, addr = next, addr != end);
-
-	if (stage2_p4d_table_empty(kvm, start_p4d))
-		clear_stage2_pgd_entry(mmu, pgd, start_addr);
-}
-
 /**
  * unmap_stage2_range -- Clear stage2 page table entries to unmap a range
  * @kvm:   The VM pointer
@@ -392,71 +140,6 @@ static void unmap_stage2_range(struct kvm_s2_mmu *mmu, phys_addr_t start, u64 si
 	__unmap_stage2_range(mmu, start, size, true);
 }
 
-static void stage2_flush_ptes(struct kvm_s2_mmu *mmu, pmd_t *pmd,
-			      phys_addr_t addr, phys_addr_t end)
-{
-	pte_t *pte;
-
-	pte = pte_offset_kernel(pmd, addr);
-	do {
-		if (!pte_none(*pte) && !kvm_is_device_pfn(pte_pfn(*pte)))
-			kvm_flush_dcache_pte(*pte);
-	} while (pte++, addr += PAGE_SIZE, addr != end);
-}
-
-static void stage2_flush_pmds(struct kvm_s2_mmu *mmu, pud_t *pud,
-			      phys_addr_t addr, phys_addr_t end)
-{
-	struct kvm *kvm = mmu->kvm;
-	pmd_t *pmd;
-	phys_addr_t next;
-
-	pmd = stage2_pmd_offset(kvm, pud, addr);
-	do {
-		next = stage2_pmd_addr_end(kvm, addr, end);
-		if (!pmd_none(*pmd)) {
-			if (pmd_thp_or_huge(*pmd))
-				kvm_flush_dcache_pmd(*pmd);
-			else
-				stage2_flush_ptes(mmu, pmd, addr, next);
-		}
-	} while (pmd++, addr = next, addr != end);
-}
-
-static void stage2_flush_puds(struct kvm_s2_mmu *mmu, p4d_t *p4d,
-			      phys_addr_t addr, phys_addr_t end)
-{
-	struct kvm *kvm = mmu->kvm;
-	pud_t *pud;
-	phys_addr_t next;
-
-	pud = stage2_pud_offset(kvm, p4d, addr);
-	do {
-		next = stage2_pud_addr_end(kvm, addr, end);
-		if (!stage2_pud_none(kvm, *pud)) {
-			if (stage2_pud_huge(kvm, *pud))
-				kvm_flush_dcache_pud(*pud);
-			else
-				stage2_flush_pmds(mmu, pud, addr, next);
-		}
-	} while (pud++, addr = next, addr != end);
-}
-
-static void stage2_flush_p4ds(struct kvm_s2_mmu *mmu, pgd_t *pgd,
-			      phys_addr_t addr, phys_addr_t end)
-{
-	struct kvm *kvm = mmu->kvm;
-	p4d_t *p4d;
-	phys_addr_t next;
-
-	p4d = stage2_p4d_offset(kvm, pgd, addr);
-	do {
-		next = stage2_p4d_addr_end(kvm, addr, end);
-		if (!stage2_p4d_none(kvm, *p4d))
-			stage2_flush_puds(mmu, p4d, addr, next);
-	} while (p4d++, addr = next, addr != end);
-}
-
 static void stage2_flush_memslot(struct kvm *kvm,
 				 struct kvm_memory_slot *memslot)
 {
@@ -805,348 +488,6 @@ void kvm_free_stage2_pgd(struct kvm_s2_mmu *mmu)
 	}
 }
 
-static p4d_t *stage2_get_p4d(struct kvm_s2_mmu *mmu, struct kvm_mmu_memory_cache *cache,
-			     phys_addr_t addr)
-{
-	struct kvm *kvm = mmu->kvm;
-	pgd_t *pgd;
-	p4d_t *p4d;
-
-	pgd = mmu->pgd + stage2_pgd_index(kvm, addr);
-	if (stage2_pgd_none(kvm, *pgd)) {
-		if (!cache)
-			return NULL;
-		p4d = kvm_mmu_memory_cache_alloc(cache);
-		stage2_pgd_populate(kvm, pgd, p4d);
-		get_page(virt_to_page(pgd));
-	}
-
-	return stage2_p4d_offset(kvm, pgd, addr);
-}
-
-static pud_t *stage2_get_pud(struct kvm_s2_mmu *mmu, struct kvm_mmu_memory_cache *cache,
-			     phys_addr_t addr)
-{
-	struct kvm *kvm = mmu->kvm;
-	p4d_t *p4d;
-	pud_t *pud;
-
-	p4d = stage2_get_p4d(mmu, cache, addr);
-	if (stage2_p4d_none(kvm, *p4d)) {
-		if (!cache)
-			return NULL;
-		pud = kvm_mmu_memory_cache_alloc(cache);
-		stage2_p4d_populate(kvm, p4d, pud);
-		get_page(virt_to_page(p4d));
-	}
-
-	return stage2_pud_offset(kvm, p4d, addr);
-}
-
-static pmd_t *stage2_get_pmd(struct kvm_s2_mmu *mmu, struct kvm_mmu_memory_cache *cache,
-			     phys_addr_t addr)
-{
-	struct kvm *kvm = mmu->kvm;
-	pud_t *pud;
-	pmd_t *pmd;
-
-	pud = stage2_get_pud(mmu, cache, addr);
-	if (!pud || stage2_pud_huge(kvm, *pud))
-		return NULL;
-
-	if (stage2_pud_none(kvm, *pud)) {
-		if (!cache)
-			return NULL;
-		pmd = kvm_mmu_memory_cache_alloc(cache);
-		stage2_pud_populate(kvm, pud, pmd);
-		get_page(virt_to_page(pud));
-	}
-
-	return stage2_pmd_offset(kvm, pud, addr);
-}
-
-static int stage2_set_pmd_huge(struct kvm_s2_mmu *mmu,
-			       struct kvm_mmu_memory_cache *cache,
-			       phys_addr_t addr, const pmd_t *new_pmd)
-{
-	pmd_t *pmd, old_pmd;
-
-retry:
-	pmd = stage2_get_pmd(mmu, cache, addr);
-	VM_BUG_ON(!pmd);
-
-	old_pmd = *pmd;
-	/*
-	 * Multiple vcpus faulting on the same PMD entry, can
-	 * lead to them sequentially updating the PMD with the
-	 * same value. Following the break-before-make
-	 * (pmd_clear() followed by tlb_flush()) process can
-	 * hinder forward progress due to refaults generated
-	 * on missing translations.
-	 *
-	 * Skip updating the page table if the entry is
-	 * unchanged.
-	 */
-	if (pmd_val(old_pmd) == pmd_val(*new_pmd))
-		return 0;
-
-	if (pmd_present(old_pmd)) {
-		/*
-		 * If we already have PTE level mapping for this block,
-		 * we must unmap it to avoid inconsistent TLB state and
-		 * leaking the table page. We could end up in this situation
-		 * if the memory slot was marked for dirty logging and was
-		 * reverted, leaving PTE level mappings for the pages accessed
-		 * during the period. So, unmap the PTE level mapping for this
-		 * block and retry, as we could have released the upper level
-		 * table in the process.
-		 *
-		 * Normal THP split/merge follows mmu_notifier callbacks and do
-		 * get handled accordingly.
-		 */
-		if (!pmd_thp_or_huge(old_pmd)) {
-			unmap_stage2_range(mmu, addr & S2_PMD_MASK, S2_PMD_SIZE);
-			goto retry;
-		}
-		/*
-		 * Mapping in huge pages should only happen through a
-		 * fault.  If a page is merged into a transparent huge
-		 * page, the individual subpages of that huge page
-		 * should be unmapped through MMU notifiers before we
-		 * get here.
-		 *
-		 * Merging of CompoundPages is not supported; they
-		 * should become splitting first, unmapped, merged,
-		 * and mapped back in on-demand.
-		 */
-		WARN_ON_ONCE(pmd_pfn(old_pmd) != pmd_pfn(*new_pmd));
-		pmd_clear(pmd);
-		kvm_tlb_flush_vmid_ipa(mmu, addr, S2_PMD_LEVEL);
-	} else {
-		get_page(virt_to_page(pmd));
-	}
-
-	kvm_set_pmd(pmd, *new_pmd);
-	return 0;
-}
-
-static int stage2_set_pud_huge(struct kvm_s2_mmu *mmu,
-			       struct kvm_mmu_memory_cache *cache,
-			       phys_addr_t addr, const pud_t *new_pudp)
-{
-	struct kvm *kvm = mmu->kvm;
-	pud_t *pudp, old_pud;
-
-retry:
-	pudp = stage2_get_pud(mmu, cache, addr);
-	VM_BUG_ON(!pudp);
-
-	old_pud = *pudp;
-
-	/*
-	 * A large number of vcpus faulting on the same stage 2 entry,
-	 * can lead to a refault due to the stage2_pud_clear()/tlb_flush().
-	 * Skip updating the page tables if there is no change.
-	 */
-	if (pud_val(old_pud) == pud_val(*new_pudp))
-		return 0;
-
-	if (stage2_pud_present(kvm, old_pud)) {
-		/*
-		 * If we already have table level mapping for this block, unmap
-		 * the range for this block and retry.
-		 */
-		if (!stage2_pud_huge(kvm, old_pud)) {
-			unmap_stage2_range(mmu, addr & S2_PUD_MASK, S2_PUD_SIZE);
-			goto retry;
-		}
-
-		WARN_ON_ONCE(kvm_pud_pfn(old_pud) != kvm_pud_pfn(*new_pudp));
-		stage2_pud_clear(kvm, pudp);
-		kvm_tlb_flush_vmid_ipa(mmu, addr, S2_PUD_LEVEL);
-	} else {
-		get_page(virt_to_page(pudp));
-	}
-
-	kvm_set_pud(pudp, *new_pudp);
-	return 0;
-}
-
-/*
- * stage2_get_leaf_entry - walk the stage2 VM page tables and return
- * true if a valid and present leaf-entry is found. A pointer to the
- * leaf-entry is returned in the appropriate level variable - pudpp,
- * pmdpp, ptepp.
- */
-static bool stage2_get_leaf_entry(struct kvm_s2_mmu *mmu, phys_addr_t addr,
-				  pud_t **pudpp, pmd_t **pmdpp, pte_t **ptepp)
-{
-	struct kvm *kvm = mmu->kvm;
-	pud_t *pudp;
-	pmd_t *pmdp;
-	pte_t *ptep;
-
-	*pudpp = NULL;
-	*pmdpp = NULL;
-	*ptepp = NULL;
-
-	pudp = stage2_get_pud(mmu, NULL, addr);
-	if (!pudp || stage2_pud_none(kvm, *pudp) || !stage2_pud_present(kvm, *pudp))
-		return false;
-
-	if (stage2_pud_huge(kvm, *pudp)) {
-		*pudpp = pudp;
-		return true;
-	}
-
-	pmdp = stage2_pmd_offset(kvm, pudp, addr);
-	if (!pmdp || pmd_none(*pmdp) || !pmd_present(*pmdp))
-		return false;
-
-	if (pmd_thp_or_huge(*pmdp)) {
-		*pmdpp = pmdp;
-		return true;
-	}
-
-	ptep = pte_offset_kernel(pmdp, addr);
-	if (!ptep || pte_none(*ptep) || !pte_present(*ptep))
-		return false;
-
-	*ptepp = ptep;
-	return true;
-}
-
-static bool stage2_is_exec(struct kvm_s2_mmu *mmu, phys_addr_t addr, unsigned long sz)
-{
-	pud_t *pudp;
-	pmd_t *pmdp;
-	pte_t *ptep;
-	bool found;
-
-	found = stage2_get_leaf_entry(mmu, addr, &pudp, &pmdp, &ptep);
-	if (!found)
-		return false;
-
-	if (pudp)
-		return sz <= PUD_SIZE && kvm_s2pud_exec(pudp);
-	else if (pmdp)
-		return sz <= PMD_SIZE && kvm_s2pmd_exec(pmdp);
-	else
-		return sz == PAGE_SIZE && kvm_s2pte_exec(ptep);
-}
-
-static int stage2_set_pte(struct kvm_s2_mmu *mmu,
-			  struct kvm_mmu_memory_cache *cache,
-			  phys_addr_t addr, const pte_t *new_pte,
-			  unsigned long flags)
-{
-	struct kvm *kvm = mmu->kvm;
-	pud_t *pud;
-	pmd_t *pmd;
-	pte_t *pte, old_pte;
-	bool iomap = flags & KVM_S2PTE_FLAG_IS_IOMAP;
-	bool logging_active = flags & KVM_S2_FLAG_LOGGING_ACTIVE;
-
-	VM_BUG_ON(logging_active && !cache);
-
-	/* Create stage-2 page table mapping - Levels 0 and 1 */
-	pud = stage2_get_pud(mmu, cache, addr);
-	if (!pud) {
-		/*
-		 * Ignore calls from kvm_set_spte_hva for unallocated
-		 * address ranges.
-		 */
-		return 0;
-	}
-
-	/*
-	 * While dirty page logging - dissolve huge PUD, then continue
-	 * on to allocate page.
-	 */
-	if (logging_active)
-		stage2_dissolve_pud(mmu, addr, pud);
-
-	if (stage2_pud_none(kvm, *pud)) {
-		if (!cache)
-			return 0; /* ignore calls from kvm_set_spte_hva */
-		pmd = kvm_mmu_memory_cache_alloc(cache);
-		stage2_pud_populate(kvm, pud, pmd);
-		get_page(virt_to_page(pud));
-	}
-
-	pmd = stage2_pmd_offset(kvm, pud, addr);
-	if (!pmd) {
-		/*
-		 * Ignore calls from kvm_set_spte_hva for unallocated
-		 * address ranges.
-		 */
-		return 0;
-	}
-
-	/*
-	 * While dirty page logging - dissolve huge PMD, then continue on to
-	 * allocate page.
-	 */
-	if (logging_active)
-		stage2_dissolve_pmd(mmu, addr, pmd);
-
-	/* Create stage-2 page mappings - Level 2 */
-	if (pmd_none(*pmd)) {
-		if (!cache)
-			return 0; /* ignore calls from kvm_set_spte_hva */
-		pte = kvm_mmu_memory_cache_alloc(cache);
-		kvm_pmd_populate(pmd, pte);
-		get_page(virt_to_page(pmd));
-	}
-
-	pte = pte_offset_kernel(pmd, addr);
-
-	if (iomap && pte_present(*pte))
-		return -EFAULT;
-
-	/* Create 2nd stage page table mapping - Level 3 */
-	old_pte = *pte;
-	if (pte_present(old_pte)) {
-		/* Skip page table update if there is no change */
-		if (pte_val(old_pte) == pte_val(*new_pte))
-			return 0;
-
-		kvm_set_pte(pte, __pte(0));
-		kvm_tlb_flush_vmid_ipa(mmu, addr, S2_PTE_LEVEL);
-	} else {
-		get_page(virt_to_page(pte));
-	}
-
-	kvm_set_pte(pte, *new_pte);
-	return 0;
-}
-
-#ifndef __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
-static int stage2_ptep_test_and_clear_young(pte_t *pte)
-{
-	if (pte_young(*pte)) {
-		*pte = pte_mkold(*pte);
-		return 1;
-	}
-	return 0;
-}
-#else
-static int stage2_ptep_test_and_clear_young(pte_t *pte)
-{
-	return __ptep_test_and_clear_young(pte);
-}
-#endif
-
-static int stage2_pmdp_test_and_clear_young(pmd_t *pmd)
-{
-	return stage2_ptep_test_and_clear_young((pte_t *)pmd);
-}
-
-static int stage2_pudp_test_and_clear_young(pud_t *pud)
-{
-	return stage2_ptep_test_and_clear_young((pte_t *)pud);
-}
-
 /**
  * kvm_phys_addr_ioremap - map a device range to guest IPA
  *
@@ -1190,102 +531,6 @@ int kvm_phys_addr_ioremap(struct kvm *kvm, phys_addr_t guest_ipa,
 }
 
 /**
- * stage2_wp_ptes - write protect PMD range
- * @pmd:	pointer to pmd entry
- * @addr:	range start address
- * @end:	range end address
- */
-static void stage2_wp_ptes(pmd_t *pmd, phys_addr_t addr, phys_addr_t end)
-{
-	pte_t *pte;
-
-	pte = pte_offset_kernel(pmd, addr);
-	do {
-		if (!pte_none(*pte)) {
-			if (!kvm_s2pte_readonly(pte))
-				kvm_set_s2pte_readonly(pte);
-		}
-	} while (pte++, addr += PAGE_SIZE, addr != end);
-}
-
-/**
- * stage2_wp_pmds - write protect PUD range
- * kvm:		kvm instance for the VM
- * @pud:	pointer to pud entry
- * @addr:	range start address
- * @end:	range end address
- */
-static void stage2_wp_pmds(struct kvm_s2_mmu *mmu, pud_t *pud,
-			   phys_addr_t addr, phys_addr_t end)
-{
-	struct kvm *kvm = mmu->kvm;
-	pmd_t *pmd;
-	phys_addr_t next;
-
-	pmd = stage2_pmd_offset(kvm, pud, addr);
-
-	do {
-		next = stage2_pmd_addr_end(kvm, addr, end);
-		if (!pmd_none(*pmd)) {
-			if (pmd_thp_or_huge(*pmd)) {
-				if (!kvm_s2pmd_readonly(pmd))
-					kvm_set_s2pmd_readonly(pmd);
-			} else {
-				stage2_wp_ptes(pmd, addr, next);
-			}
-		}
-	} while (pmd++, addr = next, addr != end);
-}
-
-/**
- * stage2_wp_puds - write protect P4D range
- * @p4d:	pointer to p4d entry
- * @addr:	range start address
- * @end:	range end address
- */
-static void  stage2_wp_puds(struct kvm_s2_mmu *mmu, p4d_t *p4d,
-			    phys_addr_t addr, phys_addr_t end)
-{
-	struct kvm *kvm = mmu->kvm;
-	pud_t *pud;
-	phys_addr_t next;
-
-	pud = stage2_pud_offset(kvm, p4d, addr);
-	do {
-		next = stage2_pud_addr_end(kvm, addr, end);
-		if (!stage2_pud_none(kvm, *pud)) {
-			if (stage2_pud_huge(kvm, *pud)) {
-				if (!kvm_s2pud_readonly(pud))
-					kvm_set_s2pud_readonly(pud);
-			} else {
-				stage2_wp_pmds(mmu, pud, addr, next);
-			}
-		}
-	} while (pud++, addr = next, addr != end);
-}
-
-/**
- * stage2_wp_p4ds - write protect PGD range
- * @pgd:	pointer to pgd entry
- * @addr:	range start address
- * @end:	range end address
- */
-static void  stage2_wp_p4ds(struct kvm_s2_mmu *mmu, pgd_t *pgd,
-			    phys_addr_t addr, phys_addr_t end)
-{
-	struct kvm *kvm = mmu->kvm;
-	p4d_t *p4d;
-	phys_addr_t next;
-
-	p4d = stage2_p4d_offset(kvm, pgd, addr);
-	do {
-		next = stage2_p4d_addr_end(kvm, addr, end);
-		if (!stage2_p4d_none(kvm, *p4d))
-			stage2_wp_puds(mmu, p4d, addr, next);
-	} while (p4d++, addr = next, addr != end);
-}
-
-/**
  * stage2_wp_range() - write protect stage2 memory region range
  * @kvm:	The KVM pointer
  * @addr:	Start address of range