13 files changed, 158 insertions, 216 deletions

diff --git a/arch/s390/mm/Makefile b/arch/s390/mm/Makefile
index 352ff520fd..f6c2db7a86 100644
--- a/arch/s390/mm/Makefile
+++ b/arch/s390/mm/Makefile
@@ -7,6 +7,7 @@ obj-y		:= init.o fault.o extmem.o mmap.o vmem.o maccess.o
 obj-y		+= page-states.o pageattr.o pgtable.o pgalloc.o extable.o
 
 obj-$(CONFIG_CMM)		+= cmm.o
+obj-$(CONFIG_DEBUG_VIRTUAL)	+= physaddr.o
 obj-$(CONFIG_HUGETLB_PAGE)	+= hugetlbpage.o
 obj-$(CONFIG_PTDUMP_CORE)	+= dump_pagetables.o
 obj-$(CONFIG_PGSTE)		+= gmap.o
diff --git a/arch/s390/mm/dump_pagetables.c b/arch/s390/mm/dump_pagetables.c
index d37a8f607b..ffd07ed7b4 100644
--- a/arch/s390/mm/dump_pagetables.c
+++ b/arch/s390/mm/dump_pagetables.c
@@ -6,7 +6,6 @@
 #include <linux/mm.h>
 #include <linux/kfence.h>
 #include <linux/kasan.h>
-#include <asm/ptdump.h>
 #include <asm/kasan.h>
 #include <asm/abs_lowcore.h>
 #include <asm/nospec-branch.h>
@@ -122,7 +121,6 @@ static void print_prot(struct seq_file *m, unsigned int pr, int level)
 
 static void note_prot_wx(struct pg_state *st, unsigned long addr)
 {
-#ifdef CONFIG_DEBUG_WX
 	if (!st->check_wx)
 		return;
 	if (st->current_prot & _PAGE_INVALID)
@@ -139,10 +137,10 @@ static void note_prot_wx(struct pg_state *st, unsigned long addr)
 	 */
 	if (addr == PAGE_SIZE && (nospec_uses_trampoline() || !static_key_enabled(&cpu_has_bear)))
 		return;
-	WARN_ONCE(1, "s390/mm: Found insecure W+X mapping at address %pS\n",
+	WARN_ONCE(IS_ENABLED(CONFIG_DEBUG_WX),
+		  "s390/mm: Found insecure W+X mapping at address %pS\n",
 		  (void *)st->start_address);
 	st->wx_pages += (addr - st->start_address) / PAGE_SIZE;
-#endif /* CONFIG_DEBUG_WX */
 }
 
 static void note_page(struct ptdump_state *pt_st, unsigned long addr, int level, u64 val)
@@ -194,8 +192,7 @@ static void note_page(struct ptdump_state *pt_st, unsigned long addr, int level,
 	}
 }
 
-#ifdef CONFIG_DEBUG_WX
-void ptdump_check_wx(void)
+bool ptdump_check_wx(void)
 {
 	struct pg_state st = {
 		.ptdump = {
@@ -218,16 +215,20 @@ void ptdump_check_wx(void)
 	};
 
 	if (!MACHINE_HAS_NX)
-		return;
+		return true;
 	ptdump_walk_pgd(&st.ptdump, &init_mm, NULL);
-	if (st.wx_pages)
+	if (st.wx_pages) {
 		pr_warn("Checked W+X mappings: FAILED, %lu W+X pages found\n", st.wx_pages);
-	else
+
+		return false;
+	} else {
 		pr_info("Checked W+X mappings: passed, no %sW+X pages found\n",
 			(nospec_uses_trampoline() || !static_key_enabled(&cpu_has_bear)) ?
 			"unexpected " : "");
+
+		return true;
+	}
 }
-#endif /* CONFIG_DEBUG_WX */
 
 #ifdef CONFIG_PTDUMP_DEBUGFS
 static int ptdump_show(struct seq_file *m, void *v)
diff --git a/arch/s390/mm/extmem.c b/arch/s390/mm/extmem.c
index e41869f5cc..282fefe107 100644
--- a/arch/s390/mm/extmem.c
+++ b/arch/s390/mm/extmem.c
@@ -136,7 +136,7 @@ dcss_diag(int *func, void *parameter,
 	unsigned long rx, ry;
 	int rc;
 
-	rx = (unsigned long) parameter;
+	rx = virt_to_phys(parameter);
 	ry = (unsigned long) *func;
 
 	diag_stat_inc(DIAG_STAT_X064);
@@ -178,7 +178,7 @@ query_segment_type (struct dcss_segment *seg)
 
 	/* initialize diag input parameters */
 	qin->qopcode = DCSS_FINDSEGA;
-	qin->qoutptr = (unsigned long) qout;
+	qin->qoutptr = virt_to_phys(qout);
 	qin->qoutlen = sizeof(struct qout64);
 	memcpy (qin->qname, seg->dcss_name, 8);
 
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index ac4c78546d..0c66b32e0f 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -67,13 +67,15 @@ early_initcall(fault_init);
 static enum fault_type get_fault_type(struct pt_regs *regs)
 {
 	union teid teid = { .val = regs->int_parm_long };
+	struct gmap *gmap;
 
 	if (likely(teid.as == PSW_BITS_AS_PRIMARY)) {
 		if (user_mode(regs))
 			return USER_FAULT;
 		if (!IS_ENABLED(CONFIG_PGSTE))
 			return KERNEL_FAULT;
-		if (test_pt_regs_flag(regs, PIF_GUEST_FAULT))
+		gmap = (struct gmap *)S390_lowcore.gmap;
+		if (gmap && gmap->asce == regs->cr1)
 			return GMAP_FAULT;
 		return KERNEL_FAULT;
 	}
diff --git a/arch/s390/mm/gmap.c b/arch/s390/mm/gmap.c
index 3b57837f3e..12d22a7fa3 100644
--- a/arch/s390/mm/gmap.c
+++ b/arch/s390/mm/gmap.c
@@ -206,9 +206,11 @@ static void gmap_free(struct gmap *gmap)
 
 	/* Free additional data for a shadow gmap */
 	if (gmap_is_shadow(gmap)) {
+		struct ptdesc *ptdesc, *n;
+
 		/* Free all page tables. */
-		list_for_each_entry_safe(page, next, &gmap->pt_list, lru)
-			page_table_free_pgste(page);
+		list_for_each_entry_safe(ptdesc, n, &gmap->pt_list, pt_list)
+			page_table_free_pgste(ptdesc);
 		gmap_rmap_radix_tree_free(&gmap->host_to_rmap);
 		/* Release reference to the parent */
 		gmap_put(gmap->parent);
@@ -601,7 +603,7 @@ int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr)
 	pmd = pmd_offset(pud, vmaddr);
 	VM_BUG_ON(pmd_none(*pmd));
 	/* Are we allowed to use huge pages? */
-	if (pmd_large(*pmd) && !gmap->mm->context.allow_gmap_hpage_1m)
+	if (pmd_leaf(*pmd) && !gmap->mm->context.allow_gmap_hpage_1m)
 		return -EFAULT;
 	/* Link gmap segment table entry location to page table. */
 	rc = radix_tree_preload(GFP_KERNEL_ACCOUNT);
@@ -613,7 +615,7 @@ int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr)
 		rc = radix_tree_insert(&gmap->host_to_guest,
 				       vmaddr >> PMD_SHIFT, table);
 		if (!rc) {
-			if (pmd_large(*pmd)) {
+			if (pmd_leaf(*pmd)) {
 				*table = (pmd_val(*pmd) &
 					  _SEGMENT_ENTRY_HARDWARE_BITS_LARGE)
 					| _SEGMENT_ENTRY_GMAP_UC;
@@ -943,7 +945,7 @@ static inline pmd_t *gmap_pmd_op_walk(struct gmap *gmap, unsigned long gaddr)
 	}
 
 	/* 4k page table entries are locked via the pte (pte_alloc_map_lock). */
-	if (!pmd_large(*pmdp))
+	if (!pmd_leaf(*pmdp))
 		spin_unlock(&gmap->guest_table_lock);
 	return pmdp;
 }
@@ -955,7 +957,7 @@ static inline pmd_t *gmap_pmd_op_walk(struct gmap *gmap, unsigned long gaddr)
  */
 static inline void gmap_pmd_op_end(struct gmap *gmap, pmd_t *pmdp)
 {
-	if (pmd_large(*pmdp))
+	if (pmd_leaf(*pmdp))
 		spin_unlock(&gmap->guest_table_lock);
 }
 
@@ -1066,7 +1068,7 @@ static int gmap_protect_range(struct gmap *gmap, unsigned long gaddr,
 		rc = -EAGAIN;
 		pmdp = gmap_pmd_op_walk(gmap, gaddr);
 		if (pmdp) {
-			if (!pmd_large(*pmdp)) {
+			if (!pmd_leaf(*pmdp)) {
 				rc = gmap_protect_pte(gmap, gaddr, pmdp, prot,
 						      bits);
 				if (!rc) {
@@ -1348,7 +1350,7 @@ static void gmap_unshadow_pgt(struct gmap *sg, unsigned long raddr)
 {
 	unsigned long *ste;
 	phys_addr_t sto, pgt;
-	struct page *page;
+	struct ptdesc *ptdesc;
 
 	BUG_ON(!gmap_is_shadow(sg));
 	ste = gmap_table_walk(sg, raddr, 1); /* get segment pointer */
@@ -1361,9 +1363,9 @@ static void gmap_unshadow_pgt(struct gmap *sg, unsigned long raddr)
 	*ste = _SEGMENT_ENTRY_EMPTY;
 	__gmap_unshadow_pgt(sg, raddr, __va(pgt));
 	/* Free page table */
-	page = phys_to_page(pgt);
-	list_del(&page->lru);
-	page_table_free_pgste(page);
+	ptdesc = page_ptdesc(phys_to_page(pgt));
+	list_del(&ptdesc->pt_list);
+	page_table_free_pgste(ptdesc);
 }
 
 /**
@@ -1377,7 +1379,7 @@ static void gmap_unshadow_pgt(struct gmap *sg, unsigned long raddr)
 static void __gmap_unshadow_sgt(struct gmap *sg, unsigned long raddr,
 				unsigned long *sgt)
 {
-	struct page *page;
+	struct ptdesc *ptdesc;
 	phys_addr_t pgt;
 	int i;
 
@@ -1389,9 +1391,9 @@ static void __gmap_unshadow_sgt(struct gmap *sg, unsigned long raddr,
 		sgt[i] = _SEGMENT_ENTRY_EMPTY;
 		__gmap_unshadow_pgt(sg, raddr, __va(pgt));
 		/* Free page table */
-		page = phys_to_page(pgt);
-		list_del(&page->lru);
-		page_table_free_pgste(page);
+		ptdesc = page_ptdesc(phys_to_page(pgt));
+		list_del(&ptdesc->pt_list);
+		page_table_free_pgste(ptdesc);
 	}
 }
 
@@ -2058,19 +2060,19 @@ int gmap_shadow_pgt(struct gmap *sg, unsigned long saddr, unsigned long pgt,
 {
 	unsigned long raddr, origin;
 	unsigned long *table;
-	struct page *page;
+	struct ptdesc *ptdesc;
 	phys_addr_t s_pgt;
 	int rc;
 
 	BUG_ON(!gmap_is_shadow(sg) || (pgt & _SEGMENT_ENTRY_LARGE));
 	/* Allocate a shadow page table */
-	page = page_table_alloc_pgste(sg->mm);
-	if (!page)
+	ptdesc = page_table_alloc_pgste(sg->mm);
+	if (!ptdesc)
 		return -ENOMEM;
-	page->index = pgt & _SEGMENT_ENTRY_ORIGIN;
+	ptdesc->pt_index = pgt & _SEGMENT_ENTRY_ORIGIN;
 	if (fake)
-		page->index |= GMAP_SHADOW_FAKE_TABLE;
-	s_pgt = page_to_phys(page);
+		ptdesc->pt_index |= GMAP_SHADOW_FAKE_TABLE;
+	s_pgt = page_to_phys(ptdesc_page(ptdesc));
 	/* Install shadow page table */
 	spin_lock(&sg->guest_table_lock);
 	table = gmap_table_walk(sg, saddr, 1); /* get segment pointer */
@@ -2088,7 +2090,7 @@ int gmap_shadow_pgt(struct gmap *sg, unsigned long saddr, unsigned long pgt,
 	/* mark as invalid as long as the parent table is not protected */
 	*table = (unsigned long) s_pgt | _SEGMENT_ENTRY |
 		 (pgt & _SEGMENT_ENTRY_PROTECT) | _SEGMENT_ENTRY_INVALID;
-	list_add(&page->lru, &sg->pt_list);
+	list_add(&ptdesc->pt_list, &sg->pt_list);
 	if (fake) {
 		/* nothing to protect for fake tables */
 		*table &= ~_SEGMENT_ENTRY_INVALID;
@@ -2114,7 +2116,7 @@ int gmap_shadow_pgt(struct gmap *sg, unsigned long saddr, unsigned long pgt,
 	return rc;
 out_free:
 	spin_unlock(&sg->guest_table_lock);
-	page_table_free_pgste(page);
+	page_table_free_pgste(ptdesc);
 	return rc;
 
 }
@@ -2498,7 +2500,7 @@ void gmap_sync_dirty_log_pmd(struct gmap *gmap, unsigned long bitmap[4],
 	if (!pmdp)
 		return;
 
-	if (pmd_large(*pmdp)) {
+	if (pmd_leaf(*pmdp)) {
 		if (gmap_test_and_clear_dirty_pmd(gmap, pmdp, gaddr))
 			bitmap_fill(bitmap, _PAGE_ENTRIES);
 	} else {
@@ -2548,6 +2550,41 @@ static inline void thp_split_mm(struct mm_struct *mm)
 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
 
 /*
+ * Remove all empty zero pages from the mapping for lazy refaulting
+ * - This must be called after mm->context.has_pgste is set, to avoid
+ *   future creation of zero pages
+ * - This must be called after THP was disabled.
+ *
+ * mm contracts with s390, that even if mm were to remove a page table,
+ * racing with the loop below and so causing pte_offset_map_lock() to fail,
+ * it will never insert a page table containing empty zero pages once
+ * mm_forbids_zeropage(mm) i.e. mm->context.has_pgste is set.
+ */
+static int __zap_zero_pages(pmd_t *pmd, unsigned long start,
+			   unsigned long end, struct mm_walk *walk)
+{
+	unsigned long addr;
+
+	for (addr = start; addr != end; addr += PAGE_SIZE) {
+		pte_t *ptep;
+		spinlock_t *ptl;
+
+		ptep = pte_offset_map_lock(walk->mm, pmd, addr, &ptl);
+		if (!ptep)
+			break;
+		if (is_zero_pfn(pte_pfn(*ptep)))
+			ptep_xchg_direct(walk->mm, addr, ptep, __pte(_PAGE_INVALID));
+		pte_unmap_unlock(ptep, ptl);
+	}
+	return 0;
+}
+
+static const struct mm_walk_ops zap_zero_walk_ops = {
+	.pmd_entry	= __zap_zero_pages,
+	.walk_lock	= PGWALK_WRLOCK,
+};
+
+/*
  * switch on pgstes for its userspace process (for kvm)
  */
 int s390_enable_sie(void)
@@ -2564,142 +2601,22 @@ int s390_enable_sie(void)
 	mm->context.has_pgste = 1;
 	/* split thp mappings and disable thp for future mappings */
 	thp_split_mm(mm);
+	walk_page_range(mm, 0, TASK_SIZE, &zap_zero_walk_ops, NULL);
 	mmap_write_unlock(mm);
 	return 0;
 }
 EXPORT_SYMBOL_GPL(s390_enable_sie);
 
-static int find_zeropage_pte_entry(pte_t *pte, unsigned long addr,
-				   unsigned long end, struct mm_walk *walk)
-{
-	unsigned long *found_addr = walk->private;
-
-	/* Return 1 of the page is a zeropage. */
-	if (is_zero_pfn(pte_pfn(*pte))) {
-		/*
-		 * Shared zeropage in e.g., a FS DAX mapping? We cannot do the
-		 * right thing and likely don't care: FAULT_FLAG_UNSHARE
-		 * currently only works in COW mappings, which is also where
-		 * mm_forbids_zeropage() is checked.
-		 */
-		if (!is_cow_mapping(walk->vma->vm_flags))
-			return -EFAULT;
-
-		*found_addr = addr;
-		return 1;
-	}
-	return 0;
-}
-
-static const struct mm_walk_ops find_zeropage_ops = {
-	.pte_entry	= find_zeropage_pte_entry,
-	.walk_lock	= PGWALK_WRLOCK,
-};
-
-/*
- * Unshare all shared zeropages, replacing them by anonymous pages. Note that
- * we cannot simply zap all shared zeropages, because this could later
- * trigger unexpected userfaultfd missing events.
- *
- * This must be called after mm->context.allow_cow_sharing was
- * set to 0, to avoid future mappings of shared zeropages.
- *
- * mm contracts with s390, that even if mm were to remove a page table,
- * and racing with walk_page_range_vma() calling pte_offset_map_lock()
- * would fail, it will never insert a page table containing empty zero
- * pages once mm_forbids_zeropage(mm) i.e.
- * mm->context.allow_cow_sharing is set to 0.
- */
-static int __s390_unshare_zeropages(struct mm_struct *mm)
-{
-	struct vm_area_struct *vma;
-	VMA_ITERATOR(vmi, mm, 0);
-	unsigned long addr;
-	vm_fault_t fault;
-	int rc;
-
-	for_each_vma(vmi, vma) {
-		/*
-		 * We could only look at COW mappings, but it's more future
-		 * proof to catch unexpected zeropages in other mappings and
-		 * fail.
-		 */
-		if ((vma->vm_flags & VM_PFNMAP) || is_vm_hugetlb_page(vma))
-			continue;
-		addr = vma->vm_start;
-
-retry:
-		rc = walk_page_range_vma(vma, addr, vma->vm_end,
-					 &find_zeropage_ops, &addr);
-		if (rc < 0)
-			return rc;
-		else if (!rc)
-			continue;
-
-		/* addr was updated by find_zeropage_pte_entry() */
-		fault = handle_mm_fault(vma, addr,
-					FAULT_FLAG_UNSHARE | FAULT_FLAG_REMOTE,
-					NULL);
-		if (fault & VM_FAULT_OOM)
-			return -ENOMEM;
-		/*
-		 * See break_ksm(): even after handle_mm_fault() returned 0, we
-		 * must start the lookup from the current address, because
-		 * handle_mm_fault() may back out if there's any difficulty.
-		 *
-		 * VM_FAULT_SIGBUS and VM_FAULT_SIGSEGV are unexpected but
-		 * maybe they could trigger in the future on concurrent
-		 * truncation. In that case, the shared zeropage would be gone
-		 * and we can simply retry and make progress.
-		 */
-		cond_resched();
-		goto retry;
-	}
-
-	return 0;
-}
-
-static int __s390_disable_cow_sharing(struct mm_struct *mm)
+int gmap_mark_unmergeable(void)
 {
-	int rc;
-
-	if (!mm->context.allow_cow_sharing)
-		return 0;
-
-	mm->context.allow_cow_sharing = 0;
-
-	/* Replace all shared zeropages by anonymous pages. */
-	rc = __s390_unshare_zeropages(mm);
 	/*
 	 * Make sure to disable KSM (if enabled for the whole process or
 	 * individual VMAs). Note that nothing currently hinders user space
 	 * from re-enabling it.
 	 */
-	if (!rc)
-		rc = ksm_disable(mm);
-	if (rc)
-		mm->context.allow_cow_sharing = 1;
-	return rc;
-}
-
-/*
- * Disable most COW-sharing of memory pages for the whole process:
- * (1) Disable KSM and unmerge/unshare any KSM pages.
- * (2) Disallow shared zeropages and unshare any zerpages that are mapped.
- *
- * Not that we currently don't bother with COW-shared pages that are shared
- * with parent/child processes due to fork().
- */
-int s390_disable_cow_sharing(void)
-{
-	int rc;
-
-	mmap_write_lock(current->mm);
-	rc = __s390_disable_cow_sharing(current->mm);
-	mmap_write_unlock(current->mm);
-	return rc;
+	return ksm_disable(current->mm);
 }
-EXPORT_SYMBOL_GPL(s390_disable_cow_sharing);
+EXPORT_SYMBOL_GPL(gmap_mark_unmergeable);
 
 /*
  * Enable storage key handling from now on and initialize the storage
@@ -2768,7 +2685,7 @@ int s390_enable_skey(void)
 		goto out_up;
 
 	mm->context.uses_skeys = 1;
-	rc = __s390_disable_cow_sharing(mm);
+	rc = gmap_mark_unmergeable();
 	if (rc) {
 		mm->context.uses_skeys = 0;
 		goto out_up;
diff --git a/arch/s390/mm/hugetlbpage.c b/arch/s390/mm/hugetlbpage.c
index 763469e518..dc3db86e13 100644
--- a/arch/s390/mm/hugetlbpage.c
+++ b/arch/s390/mm/hugetlbpage.c
@@ -235,7 +235,7 @@ pte_t *huge_pte_offset(struct mm_struct *mm,
 
 int pmd_huge(pmd_t pmd)
 {
-	return pmd_large(pmd);
+	return pmd_leaf(pmd);
 }
 
 int pud_huge(pud_t pud)
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index 43e612bc2b..f6391442c0 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -37,7 +37,6 @@
 #include <asm/pgalloc.h>
 #include <asm/ctlreg.h>
 #include <asm/kfence.h>
-#include <asm/ptdump.h>
 #include <asm/dma.h>
 #include <asm/abs_lowcore.h>
 #include <asm/tlb.h>
@@ -109,7 +108,6 @@ void mark_rodata_ro(void)
 
 	__set_memory_ro(__start_ro_after_init, __end_ro_after_init);
 	pr_info("Write protected read-only-after-init data: %luk\n", size >> 10);
-	debug_checkwx();
 }
 
 int set_memory_encrypted(unsigned long vaddr, int numpages)
@@ -281,9 +279,6 @@ int arch_add_memory(int nid, u64 start, u64 size,
 	unsigned long size_pages = PFN_DOWN(size);
 	int rc;
 
-	if (WARN_ON_ONCE(params->altmap))
-		return -EINVAL;
-
 	if (WARN_ON_ONCE(params->pgprot.pgprot != PAGE_KERNEL.pgprot))
 		return -EINVAL;
 
diff --git a/arch/s390/mm/mmap.c b/arch/s390/mm/mmap.c
index fc9a7dc26c..b14fc08876 100644
--- a/arch/s390/mm/mmap.c
+++ b/arch/s390/mm/mmap.c
@@ -71,6 +71,15 @@ static inline unsigned long mmap_base(unsigned long rnd,
 	return PAGE_ALIGN(STACK_TOP - gap - rnd);
 }
 
+static int get_align_mask(struct file *filp, unsigned long flags)
+{
+	if (!(current->flags & PF_RANDOMIZE))
+		return 0;
+	if (filp || (flags & MAP_SHARED))
+		return MMAP_ALIGN_MASK << PAGE_SHIFT;
+	return 0;
+}
+
 unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
 				     unsigned long len, unsigned long pgoff,
 				     unsigned long flags)
@@ -97,10 +106,7 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
 	info.length = len;
 	info.low_limit = mm->mmap_base;
 	info.high_limit = TASK_SIZE;
-	if (filp || (flags & MAP_SHARED))
-		info.align_mask = MMAP_ALIGN_MASK << PAGE_SHIFT;
-	else
-		info.align_mask = 0;
+	info.align_mask = get_align_mask(filp, flags);
 	info.align_offset = pgoff << PAGE_SHIFT;
 	addr = vm_unmapped_area(&info);
 	if (offset_in_page(addr))
@@ -138,10 +144,7 @@ unsigned long arch_get_unmapped_area_topdown(struct file *filp, unsigned long ad
 	info.length = len;
 	info.low_limit = PAGE_SIZE;
 	info.high_limit = mm->mmap_base;
-	if (filp || (flags & MAP_SHARED))
-		info.align_mask = MMAP_ALIGN_MASK << PAGE_SHIFT;
-	else
-		info.align_mask = 0;
+	info.align_mask = get_align_mask(filp, flags);
 	info.align_offset = pgoff << PAGE_SHIFT;
 	addr = vm_unmapped_area(&info);
 
diff --git a/arch/s390/mm/pageattr.c b/arch/s390/mm/pageattr.c
index 739185fc39..01bc8fad64 100644
--- a/arch/s390/mm/pageattr.c
+++ b/arch/s390/mm/pageattr.c
@@ -185,7 +185,7 @@ static int walk_pmd_level(pud_t *pudp, unsigned long addr, unsigned long end,
 		if (pmd_none(*pmdp))
 			return -EINVAL;
 		next = pmd_addr_end(addr, end);
-		if (pmd_large(*pmdp)) {
+		if (pmd_leaf(*pmdp)) {
 			need_split  = !!(flags & SET_MEMORY_4K);
 			need_split |= !!(addr & ~PMD_MASK);
 			need_split |= !!(addr + PMD_SIZE > next);
diff --git a/arch/s390/mm/pgalloc.c b/arch/s390/mm/pgalloc.c
index 008e487c94..abb629d7e1 100644
--- a/arch/s390/mm/pgalloc.c
+++ b/arch/s390/mm/pgalloc.c
@@ -135,7 +135,7 @@ err_p4d:
 
 #ifdef CONFIG_PGSTE
 
-struct page *page_table_alloc_pgste(struct mm_struct *mm)
+struct ptdesc *page_table_alloc_pgste(struct mm_struct *mm)
 {
 	struct ptdesc *ptdesc;
 	u64 *table;
@@ -147,12 +147,12 @@ struct page *page_table_alloc_pgste(struct mm_struct *mm)
 		memset64(table, _PAGE_INVALID, PTRS_PER_PTE);
 		memset64(table + PTRS_PER_PTE, 0, PTRS_PER_PTE);
 	}
-	return ptdesc_page(ptdesc);
+	return ptdesc;
 }
 
-void page_table_free_pgste(struct page *page)
+void page_table_free_pgste(struct ptdesc *ptdesc)
 {
-	pagetable_free(page_ptdesc(page));
+	pagetable_free(ptdesc);
 }
 
 #endif /* CONFIG_PGSTE */
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
index 3ff07b6bcd..2c944bafb0 100644
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c
@@ -721,9 +721,9 @@ static void ptep_zap_swap_entry(struct mm_struct *mm, swp_entry_t entry)
 	if (!non_swap_entry(entry))
 		dec_mm_counter(mm, MM_SWAPENTS);
 	else if (is_migration_entry(entry)) {
-		struct page *page = pfn_swap_entry_to_page(entry);
+		struct folio *folio = pfn_swap_entry_folio(entry);
 
-		dec_mm_counter(mm, mm_counter(page));
+		dec_mm_counter(mm, mm_counter(folio));
 	}
 	free_swap_and_cache(entry);
 }
@@ -827,7 +827,7 @@ again:
 		return key ? -EFAULT : 0;
 	}
 
-	if (pmd_large(*pmdp)) {
+	if (pmd_leaf(*pmdp)) {
 		paddr = pmd_val(*pmdp) & HPAGE_MASK;
 		paddr |= addr & ~HPAGE_MASK;
 		/*
@@ -938,7 +938,7 @@ again:
 		return 0;
 	}
 
-	if (pmd_large(*pmdp)) {
+	if (pmd_leaf(*pmdp)) {
 		paddr = pmd_val(*pmdp) & HPAGE_MASK;
 		paddr |= addr & ~HPAGE_MASK;
 		cc = page_reset_referenced(paddr);
@@ -1002,7 +1002,7 @@ again:
 		return 0;
 	}
 
-	if (pmd_large(*pmdp)) {
+	if (pmd_leaf(*pmdp)) {
 		paddr = pmd_val(*pmdp) & HPAGE_MASK;
 		paddr |= addr & ~HPAGE_MASK;
 		*key = page_get_storage_key(paddr);
diff --git a/arch/s390/mm/physaddr.c b/arch/s390/mm/physaddr.c
new file mode 100644
index 0000000000..59de866c72
--- /dev/null
+++ b/arch/s390/mm/physaddr.c
@@ -0,0 +1,15 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/mmdebug.h>
+#include <linux/export.h>
+#include <linux/mm.h>
+#include <asm/page.h>
+
+unsigned long __phys_addr(unsigned long x, bool is_31bit)
+{
+	VIRTUAL_BUG_ON(is_vmalloc_or_module_addr((void *)(x)));
+	x = __pa_nodebug(x);
+	if (is_31bit)
+		VIRTUAL_BUG_ON(x >> 31);
+	return x;
+}
+EXPORT_SYMBOL(__phys_addr);
diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c
index 84e173c02a..85cddf904c 100644
--- a/arch/s390/mm/vmem.c
+++ b/arch/s390/mm/vmem.c
@@ -33,8 +33,12 @@ static void __ref *vmem_alloc_pages(unsigned int order)
 	return memblock_alloc(size, size);
 }
 
-static void vmem_free_pages(unsigned long addr, int order)
+static void vmem_free_pages(unsigned long addr, int order, struct vmem_altmap *altmap)
 {
+	if (altmap) {
+		vmem_altmap_free(altmap, 1 << order);
+		return;
+	}
 	/* We don't expect boot memory to be removed ever. */
 	if (!slab_is_available() ||
 	    WARN_ON_ONCE(PageReserved(virt_to_page((void *)addr))))
@@ -156,7 +160,8 @@ static bool vmemmap_unuse_sub_pmd(unsigned long start, unsigned long end)
 
 /* __ref: we'll only call vmemmap_alloc_block() via vmemmap_populate() */
 static int __ref modify_pte_table(pmd_t *pmd, unsigned long addr,
-				  unsigned long end, bool add, bool direct)
+				  unsigned long end, bool add, bool direct,
+				  struct vmem_altmap *altmap)
 {
 	unsigned long prot, pages = 0;
 	int ret = -ENOMEM;
@@ -172,11 +177,11 @@ static int __ref modify_pte_table(pmd_t *pmd, unsigned long addr,
 			if (pte_none(*pte))
 				continue;
 			if (!direct)
-				vmem_free_pages((unsigned long) pfn_to_virt(pte_pfn(*pte)), 0);
+				vmem_free_pages((unsigned long)pfn_to_virt(pte_pfn(*pte)), get_order(PAGE_SIZE), altmap);
 			pte_clear(&init_mm, addr, pte);
 		} else if (pte_none(*pte)) {
 			if (!direct) {
-				void *new_page = vmemmap_alloc_block(PAGE_SIZE, NUMA_NO_NODE);
+				void *new_page = vmemmap_alloc_block_buf(PAGE_SIZE, NUMA_NO_NODE, altmap);
 
 				if (!new_page)
 					goto out;
@@ -213,7 +218,8 @@ static void try_free_pte_table(pmd_t *pmd, unsigned long start)
 
 /* __ref: we'll only call vmemmap_alloc_block() via vmemmap_populate() */
 static int __ref modify_pmd_table(pud_t *pud, unsigned long addr,
-				  unsigned long end, bool add, bool direct)
+				  unsigned long end, bool add, bool direct,
+				  struct vmem_altmap *altmap)
 {
 	unsigned long next, prot, pages = 0;
 	int ret = -ENOMEM;
@@ -230,15 +236,15 @@ static int __ref modify_pmd_table(pud_t *pud, unsigned long addr,
 		if (!add) {
 			if (pmd_none(*pmd))
 				continue;
-			if (pmd_large(*pmd)) {
+			if (pmd_leaf(*pmd)) {
 				if (IS_ALIGNED(addr, PMD_SIZE) &&
 				    IS_ALIGNED(next, PMD_SIZE)) {
 					if (!direct)
-						vmem_free_pages(pmd_deref(*pmd), get_order(PMD_SIZE));
+						vmem_free_pages(pmd_deref(*pmd), get_order(PMD_SIZE), altmap);
 					pmd_clear(pmd);
 					pages++;
 				} else if (!direct && vmemmap_unuse_sub_pmd(addr, next)) {
-					vmem_free_pages(pmd_deref(*pmd), get_order(PMD_SIZE));
+					vmem_free_pages(pmd_deref(*pmd), get_order(PMD_SIZE), altmap);
 					pmd_clear(pmd);
 				}
 				continue;
@@ -261,7 +267,7 @@ static int __ref modify_pmd_table(pud_t *pud, unsigned long addr,
 				 * page tables since vmemmap_populate gets
 				 * called for each section separately.
 				 */
-				new_page = vmemmap_alloc_block(PMD_SIZE, NUMA_NO_NODE);
+				new_page = vmemmap_alloc_block_buf(PMD_SIZE, NUMA_NO_NODE, altmap);
 				if (new_page) {
 					set_pmd(pmd, __pmd(__pa(new_page) | prot));
 					if (!IS_ALIGNED(addr, PMD_SIZE) ||
@@ -275,12 +281,12 @@ static int __ref modify_pmd_table(pud_t *pud, unsigned long addr,
 			if (!pte)
 				goto out;
 			pmd_populate(&init_mm, pmd, pte);
-		} else if (pmd_large(*pmd)) {
+		} else if (pmd_leaf(*pmd)) {
 			if (!direct)
 				vmemmap_use_sub_pmd(addr, next);
 			continue;
 		}
-		ret = modify_pte_table(pmd, addr, next, add, direct);
+		ret = modify_pte_table(pmd, addr, next, add, direct, altmap);
 		if (ret)
 			goto out;
 		if (!add)
@@ -302,12 +308,12 @@ static void try_free_pmd_table(pud_t *pud, unsigned long start)
 	for (i = 0; i < PTRS_PER_PMD; i++, pmd++)
 		if (!pmd_none(*pmd))
 			return;
-	vmem_free_pages(pud_deref(*pud), CRST_ALLOC_ORDER);
+	vmem_free_pages(pud_deref(*pud), CRST_ALLOC_ORDER, NULL);
 	pud_clear(pud);
 }
 
 static int modify_pud_table(p4d_t *p4d, unsigned long addr, unsigned long end,
-			    bool add, bool direct)
+			    bool add, bool direct, struct vmem_altmap *altmap)
 {
 	unsigned long next, prot, pages = 0;
 	int ret = -ENOMEM;
@@ -347,7 +353,7 @@ static int modify_pud_table(p4d_t *p4d, unsigned long addr, unsigned long end,
 		} else if (pud_leaf(*pud)) {
 			continue;
 		}
-		ret = modify_pmd_table(pud, addr, next, add, direct);
+		ret = modify_pmd_table(pud, addr, next, add, direct, altmap);
 		if (ret)
 			goto out;
 		if (!add)
@@ -370,12 +376,12 @@ static void try_free_pud_table(p4d_t *p4d, unsigned long start)
 		if (!pud_none(*pud))
 			return;
 	}
-	vmem_free_pages(p4d_deref(*p4d), CRST_ALLOC_ORDER);
+	vmem_free_pages(p4d_deref(*p4d), CRST_ALLOC_ORDER, NULL);
 	p4d_clear(p4d);
 }
 
 static int modify_p4d_table(pgd_t *pgd, unsigned long addr, unsigned long end,
-			    bool add, bool direct)
+			    bool add, bool direct, struct vmem_altmap *altmap)
 {
 	unsigned long next;
 	int ret = -ENOMEM;
@@ -394,7 +400,7 @@ static int modify_p4d_table(pgd_t *pgd, unsigned long addr, unsigned long end,
 				goto out;
 			p4d_populate(&init_mm, p4d, pud);
 		}
-		ret = modify_pud_table(p4d, addr, next, add, direct);
+		ret = modify_pud_table(p4d, addr, next, add, direct, altmap);
 		if (ret)
 			goto out;
 		if (!add)
@@ -415,12 +421,12 @@ static void try_free_p4d_table(pgd_t *pgd, unsigned long start)
 		if (!p4d_none(*p4d))
 			return;
 	}
-	vmem_free_pages(pgd_deref(*pgd), CRST_ALLOC_ORDER);
+	vmem_free_pages(pgd_deref(*pgd), CRST_ALLOC_ORDER, NULL);
 	pgd_clear(pgd);
 }
 
 static int modify_pagetable(unsigned long start, unsigned long end, bool add,
-			    bool direct)
+			    bool direct, struct vmem_altmap *altmap)
 {
 	unsigned long addr, next;
 	int ret = -ENOMEM;
@@ -445,7 +451,7 @@ static int modify_pagetable(unsigned long start, unsigned long end, bool add,
 				goto out;
 			pgd_populate(&init_mm, pgd, p4d);
 		}
-		ret = modify_p4d_table(pgd, addr, next, add, direct);
+		ret = modify_p4d_table(pgd, addr, next, add, direct, altmap);
 		if (ret)
 			goto out;
 		if (!add)
@@ -458,14 +464,16 @@ out:
 	return ret;
 }
 
-static int add_pagetable(unsigned long start, unsigned long end, bool direct)
+static int add_pagetable(unsigned long start, unsigned long end, bool direct,
+			 struct vmem_altmap *altmap)
 {
-	return modify_pagetable(start, end, true, direct);
+	return modify_pagetable(start, end, true, direct, altmap);
 }
 
-static int remove_pagetable(unsigned long start, unsigned long end, bool direct)
+static int remove_pagetable(unsigned long start, unsigned long end, bool direct,
+			    struct vmem_altmap *altmap)
 {
-	return modify_pagetable(start, end, false, direct);
+	return modify_pagetable(start, end, false, direct, altmap);
 }
 
 /*
@@ -474,7 +482,7 @@ static int remove_pagetable(unsigned long start, unsigned long end, bool direct)
 static int vmem_add_range(unsigned long start, unsigned long size)
 {
 	start = (unsigned long)__va(start);
-	return add_pagetable(start, start + size, true);
+	return add_pagetable(start, start + size, true, NULL);
 }
 
 /*
@@ -483,7 +491,7 @@ static int vmem_add_range(unsigned long start, unsigned long size)
 static void vmem_remove_range(unsigned long start, unsigned long size)
 {
 	start = (unsigned long)__va(start);
-	remove_pagetable(start, start + size, true);
+	remove_pagetable(start, start + size, true, NULL);
 }
 
 /*
@@ -496,9 +504,9 @@ int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node,
 
 	mutex_lock(&vmem_mutex);
 	/* We don't care about the node, just use NUMA_NO_NODE on allocations */
-	ret = add_pagetable(start, end, false);
+	ret = add_pagetable(start, end, false, altmap);
 	if (ret)
-		remove_pagetable(start, end, false);
+		remove_pagetable(start, end, false, altmap);
 	mutex_unlock(&vmem_mutex);
 	return ret;
 }
@@ -509,7 +517,7 @@ void vmemmap_free(unsigned long start, unsigned long end,
 		  struct vmem_altmap *altmap)
 {
 	mutex_lock(&vmem_mutex);
-	remove_pagetable(start, end, false);
+	remove_pagetable(start, end, false, altmap);
 	mutex_unlock(&vmem_mutex);
 }
 
@@ -602,7 +610,7 @@ pte_t *vmem_get_alloc_pte(unsigned long addr, bool alloc)
 		if (!pte)
 			goto out;
 		pmd_populate(&init_mm, pmd, pte);
-	} else if (WARN_ON_ONCE(pmd_large(*pmd))) {
+	} else if (WARN_ON_ONCE(pmd_leaf(*pmd))) {
 		goto out;
 	}
 	ptep = pte_offset_kernel(pmd, addr);