diff mbox series

[v1,1/5] s390/mm: gmap: sort out physical vs virtual pointers usage

Message ID 20221020143159.294605-2-nrb@linux.ibm.com (mailing list archive)
State New, archived
Headers show
Series KVM: s390: Fix virtual-real address confusions | expand

Commit Message

Nico Boehr Oct. 20, 2022, 2:31 p.m. UTC 
Fix virtual vs physical address confusion (which currently are the same).

Signed-off-by: Nico Boehr <nrb@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
---
 arch/s390/mm/gmap.c | 147 +++++++++++++++++++++++---------------------
 1 file changed, 76 insertions(+), 71 deletions(-)
diff mbox series

Patch

diff --git a/arch/s390/mm/gmap.c b/arch/s390/mm/gmap.c
index 02d15c8dc92e..2ccfcc8a3863 100644
--- a/arch/s390/mm/gmap.c
+++ b/arch/s390/mm/gmap.c
@@ -72,7 +72,7 @@  static struct gmap *gmap_alloc(unsigned long limit)
 		goto out_free;
 	page->index = 0;
 	list_add(&page->lru, &gmap->crst_list);
-	table = (unsigned long *) page_to_phys(page);
+	table = page_to_virt(page);
 	crst_table_init(table, etype);
 	gmap->table = table;
 	gmap->asce = atype | _ASCE_TABLE_LENGTH |
@@ -311,12 +311,12 @@  static int gmap_alloc_table(struct gmap *gmap, unsigned long *table,
 	page = alloc_pages(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER);
 	if (!page)
 		return -ENOMEM;
-	new = (unsigned long *) page_to_phys(page);
+	new = page_to_virt(page);
 	crst_table_init(new, init);
 	spin_lock(&gmap->guest_table_lock);
 	if (*table & _REGION_ENTRY_INVALID) {
 		list_add(&page->lru, &gmap->crst_list);
-		*table = (unsigned long) new | _REGION_ENTRY_LENGTH |
+		*table = __pa(new) | _REGION_ENTRY_LENGTH |
 			(*table & _REGION_ENTRY_TYPE_MASK);
 		page->index = gaddr;
 		page = NULL;
@@ -557,7 +557,7 @@  int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr)
 		    gmap_alloc_table(gmap, table, _REGION2_ENTRY_EMPTY,
 				     gaddr & _REGION1_MASK))
 			return -ENOMEM;
-		table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
+		table = __va(*table & _REGION_ENTRY_ORIGIN);
 	}
 	if ((gmap->asce & _ASCE_TYPE_MASK) >= _ASCE_TYPE_REGION2) {
 		table += (gaddr & _REGION2_INDEX) >> _REGION2_SHIFT;
@@ -565,7 +565,7 @@  int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr)
 		    gmap_alloc_table(gmap, table, _REGION3_ENTRY_EMPTY,
 				     gaddr & _REGION2_MASK))
 			return -ENOMEM;
-		table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
+		table = __va(*table & _REGION_ENTRY_ORIGIN);
 	}
 	if ((gmap->asce & _ASCE_TYPE_MASK) >= _ASCE_TYPE_REGION3) {
 		table += (gaddr & _REGION3_INDEX) >> _REGION3_SHIFT;
@@ -573,7 +573,7 @@  int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr)
 		    gmap_alloc_table(gmap, table, _SEGMENT_ENTRY_EMPTY,
 				     gaddr & _REGION3_MASK))
 			return -ENOMEM;
-		table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
+		table = __va(*table & _REGION_ENTRY_ORIGIN);
 	}
 	table += (gaddr & _SEGMENT_INDEX) >> _SEGMENT_SHIFT;
 	/* Walk the parent mm page table */
@@ -813,7 +813,7 @@  static inline unsigned long *gmap_table_walk(struct gmap *gmap,
 			break;
 		if (*table & _REGION_ENTRY_INVALID)
 			return NULL;
-		table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
+		table = __va(*table & _REGION_ENTRY_ORIGIN);
 		fallthrough;
 	case _ASCE_TYPE_REGION2:
 		table += (gaddr & _REGION2_INDEX) >> _REGION2_SHIFT;
@@ -821,7 +821,7 @@  static inline unsigned long *gmap_table_walk(struct gmap *gmap,
 			break;
 		if (*table & _REGION_ENTRY_INVALID)
 			return NULL;
-		table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
+		table = __va(*table & _REGION_ENTRY_ORIGIN);
 		fallthrough;
 	case _ASCE_TYPE_REGION3:
 		table += (gaddr & _REGION3_INDEX) >> _REGION3_SHIFT;
@@ -829,7 +829,7 @@  static inline unsigned long *gmap_table_walk(struct gmap *gmap,
 			break;
 		if (*table & _REGION_ENTRY_INVALID)
 			return NULL;
-		table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
+		table = __va(*table & _REGION_ENTRY_ORIGIN);
 		fallthrough;
 	case _ASCE_TYPE_SEGMENT:
 		table += (gaddr & _SEGMENT_INDEX) >> _SEGMENT_SHIFT;
@@ -837,7 +837,7 @@  static inline unsigned long *gmap_table_walk(struct gmap *gmap,
 			break;
 		if (*table & _REGION_ENTRY_INVALID)
 			return NULL;
-		table = (unsigned long *)(*table & _SEGMENT_ENTRY_ORIGIN);
+		table = __va(*table & _SEGMENT_ENTRY_ORIGIN);
 		table += (gaddr & _PAGE_INDEX) >> _PAGE_SHIFT;
 	}
 	return table;
@@ -1150,7 +1150,7 @@  int gmap_read_table(struct gmap *gmap, unsigned long gaddr, unsigned long *val)
 			if (pte_present(pte) && (pte_val(pte) & _PAGE_READ)) {
 				address = pte_val(pte) & PAGE_MASK;
 				address += gaddr & ~PAGE_MASK;
-				*val = *(unsigned long *) address;
+				*val = *(unsigned long *)__va(address);
 				set_pte(ptep, set_pte_bit(*ptep, __pgprot(_PAGE_YOUNG)));
 				/* Do *NOT* clear the _PAGE_INVALID bit! */
 				rc = 0;
@@ -1335,7 +1335,8 @@  static void __gmap_unshadow_pgt(struct gmap *sg, unsigned long raddr,
  */
 static void gmap_unshadow_pgt(struct gmap *sg, unsigned long raddr)
 {
-	unsigned long sto, *ste, *pgt;
+	unsigned long *ste;
+	phys_addr_t sto, pgt;
 	struct page *page;
 
 	BUG_ON(!gmap_is_shadow(sg));
@@ -1343,13 +1344,13 @@  static void gmap_unshadow_pgt(struct gmap *sg, unsigned long raddr)
 	if (!ste || !(*ste & _SEGMENT_ENTRY_ORIGIN))
 		return;
 	gmap_call_notifier(sg, raddr, raddr + _SEGMENT_SIZE - 1);
-	sto = (unsigned long) (ste - ((raddr & _SEGMENT_INDEX) >> _SEGMENT_SHIFT));
+	sto = __pa(ste - ((raddr & _SEGMENT_INDEX) >> _SEGMENT_SHIFT));
 	gmap_idte_one(sto | _ASCE_TYPE_SEGMENT, raddr);
-	pgt = (unsigned long *)(*ste & _SEGMENT_ENTRY_ORIGIN);
+	pgt = *ste & _SEGMENT_ENTRY_ORIGIN;
 	*ste = _SEGMENT_ENTRY_EMPTY;
-	__gmap_unshadow_pgt(sg, raddr, pgt);
+	__gmap_unshadow_pgt(sg, raddr, __va(pgt));
 	/* Free page table */
-	page = pfn_to_page(__pa(pgt) >> PAGE_SHIFT);
+	page = phys_to_page(pgt);
 	list_del(&page->lru);
 	page_table_free_pgste(page);
 }
@@ -1365,19 +1366,19 @@  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)
 {
-	unsigned long *pgt;
 	struct page *page;
+	phys_addr_t pgt;
 	int i;
 
 	BUG_ON(!gmap_is_shadow(sg));
 	for (i = 0; i < _CRST_ENTRIES; i++, raddr += _SEGMENT_SIZE) {
 		if (!(sgt[i] & _SEGMENT_ENTRY_ORIGIN))
 			continue;
-		pgt = (unsigned long *)(sgt[i] & _REGION_ENTRY_ORIGIN);
+		pgt = sgt[i] & _REGION_ENTRY_ORIGIN;
 		sgt[i] = _SEGMENT_ENTRY_EMPTY;
-		__gmap_unshadow_pgt(sg, raddr, pgt);
+		__gmap_unshadow_pgt(sg, raddr, __va(pgt));
 		/* Free page table */
-		page = pfn_to_page(__pa(pgt) >> PAGE_SHIFT);
+		page = phys_to_page(pgt);
 		list_del(&page->lru);
 		page_table_free_pgste(page);
 	}
@@ -1392,7 +1393,8 @@  static void __gmap_unshadow_sgt(struct gmap *sg, unsigned long raddr,
  */
 static void gmap_unshadow_sgt(struct gmap *sg, unsigned long raddr)
 {
-	unsigned long r3o, *r3e, *sgt;
+	unsigned long r3o, *r3e;
+	phys_addr_t sgt;
 	struct page *page;
 
 	BUG_ON(!gmap_is_shadow(sg));
@@ -1401,12 +1403,12 @@  static void gmap_unshadow_sgt(struct gmap *sg, unsigned long raddr)
 		return;
 	gmap_call_notifier(sg, raddr, raddr + _REGION3_SIZE - 1);
 	r3o = (unsigned long) (r3e - ((raddr & _REGION3_INDEX) >> _REGION3_SHIFT));
-	gmap_idte_one(r3o | _ASCE_TYPE_REGION3, raddr);
-	sgt = (unsigned long *)(*r3e & _REGION_ENTRY_ORIGIN);
+	gmap_idte_one(__pa(r3o) | _ASCE_TYPE_REGION3, raddr);
+	sgt = *r3e & _REGION_ENTRY_ORIGIN;
 	*r3e = _REGION3_ENTRY_EMPTY;
-	__gmap_unshadow_sgt(sg, raddr, sgt);
+	__gmap_unshadow_sgt(sg, raddr, __va(sgt));
 	/* Free segment table */
-	page = pfn_to_page(__pa(sgt) >> PAGE_SHIFT);
+	page = phys_to_page(sgt);
 	list_del(&page->lru);
 	__free_pages(page, CRST_ALLOC_ORDER);
 }
@@ -1422,19 +1424,19 @@  static void gmap_unshadow_sgt(struct gmap *sg, unsigned long raddr)
 static void __gmap_unshadow_r3t(struct gmap *sg, unsigned long raddr,
 				unsigned long *r3t)
 {
-	unsigned long *sgt;
 	struct page *page;
+	phys_addr_t sgt;
 	int i;
 
 	BUG_ON(!gmap_is_shadow(sg));
 	for (i = 0; i < _CRST_ENTRIES; i++, raddr += _REGION3_SIZE) {
 		if (!(r3t[i] & _REGION_ENTRY_ORIGIN))
 			continue;
-		sgt = (unsigned long *)(r3t[i] & _REGION_ENTRY_ORIGIN);
+		sgt = r3t[i] & _REGION_ENTRY_ORIGIN;
 		r3t[i] = _REGION3_ENTRY_EMPTY;
-		__gmap_unshadow_sgt(sg, raddr, sgt);
+		__gmap_unshadow_sgt(sg, raddr, __va(sgt));
 		/* Free segment table */
-		page = pfn_to_page(__pa(sgt) >> PAGE_SHIFT);
+		page = phys_to_page(sgt);
 		list_del(&page->lru);
 		__free_pages(page, CRST_ALLOC_ORDER);
 	}
@@ -1449,7 +1451,8 @@  static void __gmap_unshadow_r3t(struct gmap *sg, unsigned long raddr,
  */
 static void gmap_unshadow_r3t(struct gmap *sg, unsigned long raddr)
 {
-	unsigned long r2o, *r2e, *r3t;
+	unsigned long r2o, *r2e;
+	phys_addr_t r3t;
 	struct page *page;
 
 	BUG_ON(!gmap_is_shadow(sg));
@@ -1458,12 +1461,12 @@  static void gmap_unshadow_r3t(struct gmap *sg, unsigned long raddr)
 		return;
 	gmap_call_notifier(sg, raddr, raddr + _REGION2_SIZE - 1);
 	r2o = (unsigned long) (r2e - ((raddr & _REGION2_INDEX) >> _REGION2_SHIFT));
-	gmap_idte_one(r2o | _ASCE_TYPE_REGION2, raddr);
-	r3t = (unsigned long *)(*r2e & _REGION_ENTRY_ORIGIN);
+	gmap_idte_one(__pa(r2o) | _ASCE_TYPE_REGION2, raddr);
+	r3t = *r2e & _REGION_ENTRY_ORIGIN;
 	*r2e = _REGION2_ENTRY_EMPTY;
-	__gmap_unshadow_r3t(sg, raddr, r3t);
+	__gmap_unshadow_r3t(sg, raddr, __va(r3t));
 	/* Free region 3 table */
-	page = pfn_to_page(__pa(r3t) >> PAGE_SHIFT);
+	page = phys_to_page(r3t);
 	list_del(&page->lru);
 	__free_pages(page, CRST_ALLOC_ORDER);
 }
@@ -1479,7 +1482,7 @@  static void gmap_unshadow_r3t(struct gmap *sg, unsigned long raddr)
 static void __gmap_unshadow_r2t(struct gmap *sg, unsigned long raddr,
 				unsigned long *r2t)
 {
-	unsigned long *r3t;
+	phys_addr_t r3t;
 	struct page *page;
 	int i;
 
@@ -1487,11 +1490,11 @@  static void __gmap_unshadow_r2t(struct gmap *sg, unsigned long raddr,
 	for (i = 0; i < _CRST_ENTRIES; i++, raddr += _REGION2_SIZE) {
 		if (!(r2t[i] & _REGION_ENTRY_ORIGIN))
 			continue;
-		r3t = (unsigned long *)(r2t[i] & _REGION_ENTRY_ORIGIN);
+		r3t = r2t[i] & _REGION_ENTRY_ORIGIN;
 		r2t[i] = _REGION2_ENTRY_EMPTY;
-		__gmap_unshadow_r3t(sg, raddr, r3t);
+		__gmap_unshadow_r3t(sg, raddr, __va(r3t));
 		/* Free region 3 table */
-		page = pfn_to_page(__pa(r3t) >> PAGE_SHIFT);
+		page = phys_to_page(r3t);
 		list_del(&page->lru);
 		__free_pages(page, CRST_ALLOC_ORDER);
 	}
@@ -1506,8 +1509,9 @@  static void __gmap_unshadow_r2t(struct gmap *sg, unsigned long raddr,
  */
 static void gmap_unshadow_r2t(struct gmap *sg, unsigned long raddr)
 {
-	unsigned long r1o, *r1e, *r2t;
+	unsigned long r1o, *r1e;
 	struct page *page;
+	phys_addr_t r2t;
 
 	BUG_ON(!gmap_is_shadow(sg));
 	r1e = gmap_table_walk(sg, raddr, 4); /* get region-1 pointer */
@@ -1515,12 +1519,12 @@  static void gmap_unshadow_r2t(struct gmap *sg, unsigned long raddr)
 		return;
 	gmap_call_notifier(sg, raddr, raddr + _REGION1_SIZE - 1);
 	r1o = (unsigned long) (r1e - ((raddr & _REGION1_INDEX) >> _REGION1_SHIFT));
-	gmap_idte_one(r1o | _ASCE_TYPE_REGION1, raddr);
-	r2t = (unsigned long *)(*r1e & _REGION_ENTRY_ORIGIN);
+	gmap_idte_one(__pa(r1o) | _ASCE_TYPE_REGION1, raddr);
+	r2t = *r1e & _REGION_ENTRY_ORIGIN;
 	*r1e = _REGION1_ENTRY_EMPTY;
-	__gmap_unshadow_r2t(sg, raddr, r2t);
+	__gmap_unshadow_r2t(sg, raddr, __va(r2t));
 	/* Free region 2 table */
-	page = pfn_to_page(__pa(r2t) >> PAGE_SHIFT);
+	page = phys_to_page(r2t);
 	list_del(&page->lru);
 	__free_pages(page, CRST_ALLOC_ORDER);
 }
@@ -1536,22 +1540,23 @@  static void gmap_unshadow_r2t(struct gmap *sg, unsigned long raddr)
 static void __gmap_unshadow_r1t(struct gmap *sg, unsigned long raddr,
 				unsigned long *r1t)
 {
-	unsigned long asce, *r2t;
+	unsigned long asce;
 	struct page *page;
+	phys_addr_t r2t;
 	int i;
 
 	BUG_ON(!gmap_is_shadow(sg));
-	asce = (unsigned long) r1t | _ASCE_TYPE_REGION1;
+	asce = __pa(r1t) | _ASCE_TYPE_REGION1;
 	for (i = 0; i < _CRST_ENTRIES; i++, raddr += _REGION1_SIZE) {
 		if (!(r1t[i] & _REGION_ENTRY_ORIGIN))
 			continue;
-		r2t = (unsigned long *)(r1t[i] & _REGION_ENTRY_ORIGIN);
-		__gmap_unshadow_r2t(sg, raddr, r2t);
+		r2t = r1t[i] & _REGION_ENTRY_ORIGIN;
+		__gmap_unshadow_r2t(sg, raddr, __va(r2t));
 		/* Clear entry and flush translation r1t -> r2t */
 		gmap_idte_one(asce, raddr);
 		r1t[i] = _REGION1_ENTRY_EMPTY;
 		/* Free region 2 table */
-		page = pfn_to_page(__pa(r2t) >> PAGE_SHIFT);
+		page = phys_to_page(r2t);
 		list_del(&page->lru);
 		__free_pages(page, CRST_ALLOC_ORDER);
 	}
@@ -1573,7 +1578,7 @@  static void gmap_unshadow(struct gmap *sg)
 	sg->removed = 1;
 	gmap_call_notifier(sg, 0, -1UL);
 	gmap_flush_tlb(sg);
-	table = (unsigned long *)(sg->asce & _ASCE_ORIGIN);
+	table = __va(sg->asce & _ASCE_ORIGIN);
 	switch (sg->asce & _ASCE_TYPE_MASK) {
 	case _ASCE_TYPE_REGION1:
 		__gmap_unshadow_r1t(sg, 0, table);
@@ -1748,7 +1753,8 @@  int gmap_shadow_r2t(struct gmap *sg, unsigned long saddr, unsigned long r2t,
 		    int fake)
 {
 	unsigned long raddr, origin, offset, len;
-	unsigned long *s_r2t, *table;
+	unsigned long *table;
+	phys_addr_t s_r2t;
 	struct page *page;
 	int rc;
 
@@ -1760,7 +1766,7 @@  int gmap_shadow_r2t(struct gmap *sg, unsigned long saddr, unsigned long r2t,
 	page->index = r2t & _REGION_ENTRY_ORIGIN;
 	if (fake)
 		page->index |= GMAP_SHADOW_FAKE_TABLE;
-	s_r2t = (unsigned long *) page_to_phys(page);
+	s_r2t = page_to_phys(page);
 	/* Install shadow region second table */
 	spin_lock(&sg->guest_table_lock);
 	table = gmap_table_walk(sg, saddr, 4); /* get region-1 pointer */
@@ -1775,9 +1781,9 @@  int gmap_shadow_r2t(struct gmap *sg, unsigned long saddr, unsigned long r2t,
 		rc = -EAGAIN;		/* Race with shadow */
 		goto out_free;
 	}
-	crst_table_init(s_r2t, _REGION2_ENTRY_EMPTY);
+	crst_table_init(__va(s_r2t), _REGION2_ENTRY_EMPTY);
 	/* mark as invalid as long as the parent table is not protected */
-	*table = (unsigned long) s_r2t | _REGION_ENTRY_LENGTH |
+	*table = s_r2t | _REGION_ENTRY_LENGTH |
 		 _REGION_ENTRY_TYPE_R1 | _REGION_ENTRY_INVALID;
 	if (sg->edat_level >= 1)
 		*table |= (r2t & _REGION_ENTRY_PROTECT);
@@ -1798,8 +1804,7 @@  int gmap_shadow_r2t(struct gmap *sg, unsigned long saddr, unsigned long r2t,
 	spin_lock(&sg->guest_table_lock);
 	if (!rc) {
 		table = gmap_table_walk(sg, saddr, 4);
-		if (!table || (*table & _REGION_ENTRY_ORIGIN) !=
-			      (unsigned long) s_r2t)
+		if (!table || (*table & _REGION_ENTRY_ORIGIN) != s_r2t)
 			rc = -EAGAIN;		/* Race with unshadow */
 		else
 			*table &= ~_REGION_ENTRY_INVALID;
@@ -1832,7 +1837,8 @@  int gmap_shadow_r3t(struct gmap *sg, unsigned long saddr, unsigned long r3t,
 		    int fake)
 {
 	unsigned long raddr, origin, offset, len;
-	unsigned long *s_r3t, *table;
+	unsigned long *table;
+	phys_addr_t s_r3t;
 	struct page *page;
 	int rc;
 
@@ -1844,7 +1850,7 @@  int gmap_shadow_r3t(struct gmap *sg, unsigned long saddr, unsigned long r3t,
 	page->index = r3t & _REGION_ENTRY_ORIGIN;
 	if (fake)
 		page->index |= GMAP_SHADOW_FAKE_TABLE;
-	s_r3t = (unsigned long *) page_to_phys(page);
+	s_r3t = page_to_phys(page);
 	/* Install shadow region second table */
 	spin_lock(&sg->guest_table_lock);
 	table = gmap_table_walk(sg, saddr, 3); /* get region-2 pointer */
@@ -1859,9 +1865,9 @@  int gmap_shadow_r3t(struct gmap *sg, unsigned long saddr, unsigned long r3t,
 		rc = -EAGAIN;		/* Race with shadow */
 		goto out_free;
 	}
-	crst_table_init(s_r3t, _REGION3_ENTRY_EMPTY);
+	crst_table_init(__va(s_r3t), _REGION3_ENTRY_EMPTY);
 	/* mark as invalid as long as the parent table is not protected */
-	*table = (unsigned long) s_r3t | _REGION_ENTRY_LENGTH |
+	*table = s_r3t | _REGION_ENTRY_LENGTH |
 		 _REGION_ENTRY_TYPE_R2 | _REGION_ENTRY_INVALID;
 	if (sg->edat_level >= 1)
 		*table |= (r3t & _REGION_ENTRY_PROTECT);
@@ -1882,8 +1888,7 @@  int gmap_shadow_r3t(struct gmap *sg, unsigned long saddr, unsigned long r3t,
 	spin_lock(&sg->guest_table_lock);
 	if (!rc) {
 		table = gmap_table_walk(sg, saddr, 3);
-		if (!table || (*table & _REGION_ENTRY_ORIGIN) !=
-			      (unsigned long) s_r3t)
+		if (!table || (*table & _REGION_ENTRY_ORIGIN) != s_r3t)
 			rc = -EAGAIN;		/* Race with unshadow */
 		else
 			*table &= ~_REGION_ENTRY_INVALID;
@@ -1916,7 +1921,8 @@  int gmap_shadow_sgt(struct gmap *sg, unsigned long saddr, unsigned long sgt,
 		    int fake)
 {
 	unsigned long raddr, origin, offset, len;
-	unsigned long *s_sgt, *table;
+	unsigned long *table;
+	phys_addr_t s_sgt;
 	struct page *page;
 	int rc;
 
@@ -1928,7 +1934,7 @@  int gmap_shadow_sgt(struct gmap *sg, unsigned long saddr, unsigned long sgt,
 	page->index = sgt & _REGION_ENTRY_ORIGIN;
 	if (fake)
 		page->index |= GMAP_SHADOW_FAKE_TABLE;
-	s_sgt = (unsigned long *) page_to_phys(page);
+	s_sgt = page_to_phys(page);
 	/* Install shadow region second table */
 	spin_lock(&sg->guest_table_lock);
 	table = gmap_table_walk(sg, saddr, 2); /* get region-3 pointer */
@@ -1943,9 +1949,9 @@  int gmap_shadow_sgt(struct gmap *sg, unsigned long saddr, unsigned long sgt,
 		rc = -EAGAIN;		/* Race with shadow */
 		goto out_free;
 	}
-	crst_table_init(s_sgt, _SEGMENT_ENTRY_EMPTY);
+	crst_table_init(__va(s_sgt), _SEGMENT_ENTRY_EMPTY);
 	/* mark as invalid as long as the parent table is not protected */
-	*table = (unsigned long) s_sgt | _REGION_ENTRY_LENGTH |
+	*table = s_sgt | _REGION_ENTRY_LENGTH |
 		 _REGION_ENTRY_TYPE_R3 | _REGION_ENTRY_INVALID;
 	if (sg->edat_level >= 1)
 		*table |= sgt & _REGION_ENTRY_PROTECT;
@@ -1966,8 +1972,7 @@  int gmap_shadow_sgt(struct gmap *sg, unsigned long saddr, unsigned long sgt,
 	spin_lock(&sg->guest_table_lock);
 	if (!rc) {
 		table = gmap_table_walk(sg, saddr, 2);
-		if (!table || (*table & _REGION_ENTRY_ORIGIN) !=
-			      (unsigned long) s_sgt)
+		if (!table || (*table & _REGION_ENTRY_ORIGIN) != s_sgt)
 			rc = -EAGAIN;		/* Race with unshadow */
 		else
 			*table &= ~_REGION_ENTRY_INVALID;
@@ -2040,8 +2045,9 @@  int gmap_shadow_pgt(struct gmap *sg, unsigned long saddr, unsigned long pgt,
 		    int fake)
 {
 	unsigned long raddr, origin;
-	unsigned long *s_pgt, *table;
+	unsigned long *table;
 	struct page *page;
+	phys_addr_t s_pgt;
 	int rc;
 
 	BUG_ON(!gmap_is_shadow(sg) || (pgt & _SEGMENT_ENTRY_LARGE));
@@ -2052,7 +2058,7 @@  int gmap_shadow_pgt(struct gmap *sg, unsigned long saddr, unsigned long pgt,
 	page->index = pgt & _SEGMENT_ENTRY_ORIGIN;
 	if (fake)
 		page->index |= GMAP_SHADOW_FAKE_TABLE;
-	s_pgt = (unsigned long *) page_to_phys(page);
+	s_pgt = page_to_phys(page);
 	/* Install shadow page table */
 	spin_lock(&sg->guest_table_lock);
 	table = gmap_table_walk(sg, saddr, 1); /* get segment pointer */
@@ -2085,8 +2091,7 @@  int gmap_shadow_pgt(struct gmap *sg, unsigned long saddr, unsigned long pgt,
 	spin_lock(&sg->guest_table_lock);
 	if (!rc) {
 		table = gmap_table_walk(sg, saddr, 1);
-		if (!table || (*table & _SEGMENT_ENTRY_ORIGIN) !=
-			      (unsigned long) s_pgt)
+		if (!table || (*table & _SEGMENT_ENTRY_ORIGIN) != s_pgt)
 			rc = -EAGAIN;		/* Race with unshadow */
 		else
 			*table &= ~_SEGMENT_ENTRY_INVALID;