powerpc/mm: Convert virtual address to vpn

This patch convert different functions to take virtual page number
instead of virtual address. Virtual page number is virtual address
shifted right by VPN_SHIFT (12) bits. This enable us to have an
address range of upto 76 bits.

Reviewed-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

3 files changed, 65 insertions, 78 deletions

diff --git a/arch/powerpc/platforms/cell/beat_htab.c b/arch/powerpc/platforms/cell/beat_htab.c
index b83077e1316..0f6f83988b3 100644
--- a/arch/powerpc/platforms/cell/beat_htab.c
+++ b/arch/powerpc/platforms/cell/beat_htab.c
@@ -88,7 +88,7 @@ static inline unsigned int beat_read_mask(unsigned hpte_group)
 }
 
 static long beat_lpar_hpte_insert(unsigned long hpte_group,
-				  unsigned long va, unsigned long pa,
+				  unsigned long vpn, unsigned long pa,
 				  unsigned long rflags, unsigned long vflags,
 				  int psize, int ssize)
 {
@@ -103,7 +103,7 @@ static long beat_lpar_hpte_insert(unsigned long hpte_group,
 			"rflags=%lx, vflags=%lx, psize=%d)\n",
 		hpte_group, va, pa, rflags, vflags, psize);
 
-	hpte_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M) |
+	hpte_v = hpte_encode_v(vpn, psize, MMU_SEGSIZE_256M) |
 		vflags | HPTE_V_VALID;
 	hpte_r = hpte_encode_r(pa, psize) | rflags;
 
@@ -184,14 +184,14 @@ static void beat_lpar_hptab_clear(void)
  */
 static long beat_lpar_hpte_updatepp(unsigned long slot,
 				    unsigned long newpp,
-				    unsigned long va,
+				    unsigned long vpn,
 				    int psize, int ssize, int local)
 {
 	unsigned long lpar_rc;
 	u64 dummy0, dummy1;
 	unsigned long want_v;
 
-	want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
+	want_v = hpte_encode_v(vpn, psize, MMU_SEGSIZE_256M);
 
 	DBG_LOW("    update: "
 		"avpnv=%016lx, slot=%016lx, psize: %d, newpp %016lx ... ",
@@ -220,15 +220,15 @@ static long beat_lpar_hpte_updatepp(unsigned long slot,
 	return 0;
 }
 
-static long beat_lpar_hpte_find(unsigned long va, int psize)
+static long beat_lpar_hpte_find(unsigned long vpn, int psize)
 {
 	unsigned long hash;
 	unsigned long i, j;
 	long slot;
 	unsigned long want_v, hpte_v;
 
-	hash = hpt_hash(va, mmu_psize_defs[psize].shift, MMU_SEGSIZE_256M);
-	want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
+	hash = hpt_hash(vpn, mmu_psize_defs[psize].shift, MMU_SEGSIZE_256M);
+	want_v = hpte_encode_v(vpn, psize, MMU_SEGSIZE_256M);
 
 	for (j = 0; j < 2; j++) {
 		slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
@@ -255,14 +255,15 @@ static void beat_lpar_hpte_updateboltedpp(unsigned long newpp,
 					  unsigned long ea,
 					  int psize, int ssize)
 {
-	unsigned long lpar_rc, slot, vsid, va;
+	unsigned long vpn;
+	unsigned long lpar_rc, slot, vsid;
 	u64 dummy0, dummy1;
 
 	vsid = get_kernel_vsid(ea, MMU_SEGSIZE_256M);
-	va = hpt_va(ea, vsid, MMU_SEGSIZE_256M);
+	vpn = hpt_vpn(ea, vsid, MMU_SEGSIZE_256M);
 
 	raw_spin_lock(&beat_htab_lock);
-	slot = beat_lpar_hpte_find(va, psize);
+	slot = beat_lpar_hpte_find(vpn, psize);
 	BUG_ON(slot == -1);
 
 	lpar_rc = beat_write_htab_entry(0, slot, 0, newpp, 0, 7,
@@ -272,7 +273,7 @@ static void beat_lpar_hpte_updateboltedpp(unsigned long newpp,
 	BUG_ON(lpar_rc != 0);
 }
 
-static void beat_lpar_hpte_invalidate(unsigned long slot, unsigned long va,
+static void beat_lpar_hpte_invalidate(unsigned long slot, unsigned long vpn,
 					 int psize, int ssize, int local)
 {
 	unsigned long want_v;
@@ -282,7 +283,7 @@ static void beat_lpar_hpte_invalidate(unsigned long slot, unsigned long va,
 
 	DBG_LOW("    inval : slot=%lx, va=%016lx, psize: %d, local: %d\n",
 		slot, va, psize, local);
-	want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
+	want_v = hpte_encode_v(vpn, psize, MMU_SEGSIZE_256M);
 
 	raw_spin_lock_irqsave(&beat_htab_lock, flags);
 	dummy1 = beat_lpar_hpte_getword0(slot);
@@ -311,7 +312,7 @@ void __init hpte_init_beat(void)
 }
 
 static long beat_lpar_hpte_insert_v3(unsigned long hpte_group,
-				  unsigned long va, unsigned long pa,
+				  unsigned long vpn, unsigned long pa,
 				  unsigned long rflags, unsigned long vflags,
 				  int psize, int ssize)
 {
@@ -322,11 +323,11 @@ static long beat_lpar_hpte_insert_v3(unsigned long hpte_group,
 		return -1;
 
 	if (!(vflags & HPTE_V_BOLTED))
-		DBG_LOW("hpte_insert(group=%lx, va=%016lx, pa=%016lx, "
+		DBG_LOW("hpte_insert(group=%lx, vpn=%016lx, pa=%016lx, "
 			"rflags=%lx, vflags=%lx, psize=%d)\n",
-		hpte_group, va, pa, rflags, vflags, psize);
+		hpte_group, vpn, pa, rflags, vflags, psize);
 
-	hpte_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M) |
+	hpte_v = hpte_encode_v(vpn, psize, MMU_SEGSIZE_256M) |
 		vflags | HPTE_V_VALID;
 	hpte_r = hpte_encode_r(pa, psize) | rflags;
 
@@ -364,14 +365,14 @@ static long beat_lpar_hpte_insert_v3(unsigned long hpte_group,
  */
 static long beat_lpar_hpte_updatepp_v3(unsigned long slot,
 				    unsigned long newpp,
-				    unsigned long va,
+				    unsigned long vpn,
 				    int psize, int ssize, int local)
 {
 	unsigned long lpar_rc;
 	unsigned long want_v;
 	unsigned long pss;
 
-	want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
+	want_v = hpte_encode_v(vpn, psize, MMU_SEGSIZE_256M);
 	pss = (psize == MMU_PAGE_4K) ? -1UL : mmu_psize_defs[psize].penc;
 
 	DBG_LOW("    update: "
@@ -392,16 +393,16 @@ static long beat_lpar_hpte_updatepp_v3(unsigned long slot,
 	return 0;
 }
 
-static void beat_lpar_hpte_invalidate_v3(unsigned long slot, unsigned long va,
+static void beat_lpar_hpte_invalidate_v3(unsigned long slot, unsigned long vpn,
 					 int psize, int ssize, int local)
 {
 	unsigned long want_v;
 	unsigned long lpar_rc;
 	unsigned long pss;
 
-	DBG_LOW("    inval : slot=%lx, va=%016lx, psize: %d, local: %d\n",
-		slot, va, psize, local);
-	want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
+	DBG_LOW("    inval : slot=%lx, vpn=%016lx, psize: %d, local: %d\n",
+		slot, vpn, psize, local);
+	want_v = hpte_encode_v(vpn, psize, MMU_SEGSIZE_256M);
 	pss = (psize == MMU_PAGE_4K) ? -1UL : mmu_psize_defs[psize].penc;
 
 	lpar_rc = beat_invalidate_htab_entry3(0, slot, want_v, pss);
diff --git a/arch/powerpc/platforms/ps3/htab.c b/arch/powerpc/platforms/ps3/htab.c
index 3124cf791eb..d00d7b0a3bd 100644
--- a/arch/powerpc/platforms/ps3/htab.c
+++ b/arch/powerpc/platforms/ps3/htab.c
@@ -43,7 +43,7 @@ enum ps3_lpar_vas_id {
 
 static DEFINE_SPINLOCK(ps3_htab_lock);
 
-static long ps3_hpte_insert(unsigned long hpte_group, unsigned long va,
+static long ps3_hpte_insert(unsigned long hpte_group, unsigned long vpn,
 	unsigned long pa, unsigned long rflags, unsigned long vflags,
 	int psize, int ssize)
 {
@@ -61,7 +61,7 @@ static long ps3_hpte_insert(unsigned long hpte_group, unsigned long va,
 	 */
 	vflags &= ~HPTE_V_SECONDARY;
 
-	hpte_v = hpte_encode_v(va, psize, ssize) | vflags | HPTE_V_VALID;
+	hpte_v = hpte_encode_v(vpn, psize, ssize) | vflags | HPTE_V_VALID;
 	hpte_r = hpte_encode_r(ps3_mm_phys_to_lpar(pa), psize) | rflags;
 
 	spin_lock_irqsave(&ps3_htab_lock, flags);
@@ -75,8 +75,8 @@ static long ps3_hpte_insert(unsigned long hpte_group, unsigned long va,
 
 	if (result) {
 		/* all entries bolted !*/
-		pr_info("%s:result=%d va=%lx pa=%lx ix=%lx v=%llx r=%llx\n",
-			__func__, result, va, pa, hpte_group, hpte_v, hpte_r);
+		pr_info("%s:result=%d vpn=%lx pa=%lx ix=%lx v=%llx r=%llx\n",
+			__func__, result, vpn, pa, hpte_group, hpte_v, hpte_r);
 		BUG();
 	}
 
@@ -107,7 +107,7 @@ static long ps3_hpte_remove(unsigned long hpte_group)
 }
 
 static long ps3_hpte_updatepp(unsigned long slot, unsigned long newpp,
-	unsigned long va, int psize, int ssize, int local)
+	unsigned long vpn, int psize, int ssize, int local)
 {
 	int result;
 	u64 hpte_v, want_v, hpte_rs;
@@ -115,7 +115,7 @@ static long ps3_hpte_updatepp(unsigned long slot, unsigned long newpp,
 	unsigned long flags;
 	long ret;
 
-	want_v = hpte_encode_v(va, psize, ssize);
+	want_v = hpte_encode_v(vpn, psize, ssize);
 
 	spin_lock_irqsave(&ps3_htab_lock, flags);
 
@@ -125,8 +125,8 @@ static long ps3_hpte_updatepp(unsigned long slot, unsigned long newpp,
 				       &hpte_rs);
 
 	if (result) {
-		pr_info("%s: res=%d read va=%lx slot=%lx psize=%d\n",
-			__func__, result, va, slot, psize);
+		pr_info("%s: res=%d read vpn=%lx slot=%lx psize=%d\n",
+			__func__, result, vpn, slot, psize);
 		BUG();
 	}
 
@@ -159,7 +159,7 @@ static void ps3_hpte_updateboltedpp(unsigned long newpp, unsigned long ea,
 	panic("ps3_hpte_updateboltedpp() not implemented");
 }
 
-static void ps3_hpte_invalidate(unsigned long slot, unsigned long va,
+static void ps3_hpte_invalidate(unsigned long slot, unsigned long vpn,
 	int psize, int ssize, int local)
 {
 	unsigned long flags;
@@ -170,8 +170,8 @@ static void ps3_hpte_invalidate(unsigned long slot, unsigned long va,
 	result = lv1_write_htab_entry(PS3_LPAR_VAS_ID_CURRENT, slot, 0, 0);
 
 	if (result) {
-		pr_info("%s: res=%d va=%lx slot=%lx psize=%d\n",
-			__func__, result, va, slot, psize);
+		pr_info("%s: res=%d vpn=%lx slot=%lx psize=%d\n",
+			__func__, result, vpn, slot, psize);
 		BUG();
 	}
 
diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c
index 177055d0186..0da39fed355 100644
--- a/arch/powerpc/platforms/pseries/lpar.c
+++ b/arch/powerpc/platforms/pseries/lpar.c
@@ -107,9 +107,9 @@ void vpa_init(int cpu)
 }
 
 static long pSeries_lpar_hpte_insert(unsigned long hpte_group,
- 			      unsigned long va, unsigned long pa,
- 			      unsigned long rflags, unsigned long vflags,
-			      int psize, int ssize)
+				     unsigned long vpn, unsigned long pa,
+				     unsigned long rflags, unsigned long vflags,
+				     int psize, int ssize)
 {
 	unsigned long lpar_rc;
 	unsigned long flags;
@@ -117,11 +117,11 @@ static long pSeries_lpar_hpte_insert(unsigned long hpte_group,
 	unsigned long hpte_v, hpte_r;
 
 	if (!(vflags & HPTE_V_BOLTED))
-		pr_devel("hpte_insert(group=%lx, va=%016lx, pa=%016lx, "
-			 "rflags=%lx, vflags=%lx, psize=%d)\n",
-			 hpte_group, va, pa, rflags, vflags, psize);
+		pr_devel("hpte_insert(group=%lx, vpn=%016lx, "
+			 "pa=%016lx, rflags=%lx, vflags=%lx, psize=%d)\n",
+			 hpte_group, vpn,  pa, rflags, vflags, psize);
 
-	hpte_v = hpte_encode_v(va, psize, ssize) | vflags | HPTE_V_VALID;
+	hpte_v = hpte_encode_v(vpn, psize, ssize) | vflags | HPTE_V_VALID;
 	hpte_r = hpte_encode_r(pa, psize) | rflags;
 
 	if (!(vflags & HPTE_V_BOLTED))
@@ -226,22 +226,6 @@ static void pSeries_lpar_hptab_clear(void)
 }
 
 /*
- * This computes the AVPN and B fields of the first dword of a HPTE,
- * for use when we want to match an existing PTE.  The bottom 7 bits
- * of the returned value are zero.
- */
-static inline unsigned long hpte_encode_avpn(unsigned long va, int psize,
-					     int ssize)
-{
-	unsigned long v;
-
-	v = (va >> 23) & ~(mmu_psize_defs[psize].avpnm);
-	v <<= HPTE_V_AVPN_SHIFT;
-	v |= ((unsigned long) ssize) << HPTE_V_SSIZE_SHIFT;
-	return v;
-}
-
-/*
  * NOTE: for updatepp ops we are fortunate that the linux "newpp" bits and
  * the low 3 bits of flags happen to line up.  So no transform is needed.
  * We can probably optimize here and assume the high bits of newpp are
@@ -249,14 +233,14 @@ static inline unsigned long hpte_encode_avpn(unsigned long va, int psize,
  */
 static long pSeries_lpar_hpte_updatepp(unsigned long slot,
 				       unsigned long newpp,
-				       unsigned long va,
+				       unsigned long vpn,
 				       int psize, int ssize, int local)
 {
 	unsigned long lpar_rc;
 	unsigned long flags = (newpp & 7) | H_AVPN;
 	unsigned long want_v;
 
-	want_v = hpte_encode_avpn(va, psize, ssize);
+	want_v = hpte_encode_avpn(vpn, psize, ssize);
 
 	pr_devel("    update: avpnv=%016lx, hash=%016lx, f=%lx, psize: %d ...",
 		 want_v, slot, flags, psize);
@@ -294,15 +278,15 @@ static unsigned long pSeries_lpar_hpte_getword0(unsigned long slot)
 	return dword0;
 }
 
-static long pSeries_lpar_hpte_find(unsigned long va, int psize, int ssize)
+static long pSeries_lpar_hpte_find(unsigned long vpn, int psize, int ssize)
 {
 	unsigned long hash;
 	unsigned long i;
 	long slot;
 	unsigned long want_v, hpte_v;
 
-	hash = hpt_hash(va, mmu_psize_defs[psize].shift, ssize);
-	want_v = hpte_encode_avpn(va, psize, ssize);
+	hash = hpt_hash(vpn, mmu_psize_defs[psize].shift, ssize);
+	want_v = hpte_encode_avpn(vpn, psize, ssize);
 
 	/* Bolted entries are always in the primary group */
 	slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
@@ -322,12 +306,13 @@ static void pSeries_lpar_hpte_updateboltedpp(unsigned long newpp,
 					     unsigned long ea,
 					     int psize, int ssize)
 {
-	unsigned long lpar_rc, slot, vsid, va, flags;
+	unsigned long vpn;
+	unsigned long lpar_rc, slot, vsid, flags;
 
 	vsid = get_kernel_vsid(ea, ssize);
-	va = hpt_va(ea, vsid, ssize);
+	vpn = hpt_vpn(ea, vsid, ssize);
 
-	slot = pSeries_lpar_hpte_find(va, psize, ssize);
+	slot = pSeries_lpar_hpte_find(vpn, psize, ssize);
 	BUG_ON(slot == -1);
 
 	flags = newpp & 7;
@@ -336,17 +321,17 @@ static void pSeries_lpar_hpte_updateboltedpp(unsigned long newpp,
 	BUG_ON(lpar_rc != H_SUCCESS);
 }
 
-static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long va,
+static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long vpn,
 					 int psize, int ssize, int local)
 {
 	unsigned long want_v;
 	unsigned long lpar_rc;
 	unsigned long dummy1, dummy2;
 
-	pr_devel("    inval : slot=%lx, va=%016lx, psize: %d, local: %d\n",
-		 slot, va, psize, local);
+	pr_devel("    inval : slot=%lx, vpn=%016lx, psize: %d, local: %d\n",
+		 slot, vpn, psize, local);
 
-	want_v = hpte_encode_avpn(va, psize, ssize);
+	want_v = hpte_encode_avpn(vpn, psize, ssize);
 	lpar_rc = plpar_pte_remove(H_AVPN, slot, want_v, &dummy1, &dummy2);
 	if (lpar_rc == H_NOT_FOUND)
 		return;
@@ -357,15 +342,16 @@ static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long va,
 static void pSeries_lpar_hpte_removebolted(unsigned long ea,
 					   int psize, int ssize)
 {
-	unsigned long slot, vsid, va;
+	unsigned long vpn;
+	unsigned long slot, vsid;
 
 	vsid = get_kernel_vsid(ea, ssize);
-	va = hpt_va(ea, vsid, ssize);
+	vpn = hpt_vpn(ea, vsid, ssize);
 
-	slot = pSeries_lpar_hpte_find(va, psize, ssize);
+	slot = pSeries_lpar_hpte_find(vpn, psize, ssize);
 	BUG_ON(slot == -1);
 
-	pSeries_lpar_hpte_invalidate(slot, va, psize, ssize, 0);
+	pSeries_lpar_hpte_invalidate(slot, vpn, psize, ssize, 0);
 }
 
 /* Flag bits for H_BULK_REMOVE */
@@ -381,12 +367,12 @@ static void pSeries_lpar_hpte_removebolted(unsigned long ea,
  */
 static void pSeries_lpar_flush_hash_range(unsigned long number, int local)
 {
+	unsigned long vpn;
 	unsigned long i, pix, rc;
 	unsigned long flags = 0;
 	struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch);
 	int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE);
 	unsigned long param[9];
-	unsigned long va;
 	unsigned long hash, index, shift, hidx, slot;
 	real_pte_t pte;
 	int psize, ssize;
@@ -398,21 +384,21 @@ static void pSeries_lpar_flush_hash_range(unsigned long number, int local)
 	ssize = batch->ssize;
 	pix = 0;
 	for (i = 0; i < number; i++) {
-		va = batch->vaddr[i];
+		vpn = batch->vpn[i];
 		pte = batch->pte[i];
-		pte_iterate_hashed_subpages(pte, psize, va, index, shift) {
-			hash = hpt_hash(va, shift, ssize);
+		pte_iterate_hashed_subpages(pte, psize, vpn, index, shift) {
+			hash = hpt_hash(vpn, shift, ssize);
 			hidx = __rpte_to_hidx(pte, index);
 			if (hidx & _PTEIDX_SECONDARY)
 				hash = ~hash;
 			slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
 			slot += hidx & _PTEIDX_GROUP_IX;
 			if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) {
-				pSeries_lpar_hpte_invalidate(slot, va, psize,
+				pSeries_lpar_hpte_invalidate(slot, vpn, psize,
 							     ssize, local);
 			} else {
 				param[pix] = HBR_REQUEST | HBR_AVPN | slot;
-				param[pix+1] = hpte_encode_avpn(va, psize,
+				param[pix+1] = hpte_encode_avpn(vpn, psize,
 								ssize);
 				pix += 2;
 				if (pix == 8) {