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, 21 insertions, 18 deletions

diff --git a/arch/powerpc/kvm/book3s_32_mmu_host.c b/arch/powerpc/kvm/book3s_32_mmu_host.c
index 837f13e7b6bf..00aa61268e0d 100644
--- a/arch/powerpc/kvm/book3s_32_mmu_host.c
+++ b/arch/powerpc/kvm/book3s_32_mmu_host.c
@@ -141,7 +141,7 @@ extern char etext[];
 int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *orig_pte)
 {
 	pfn_t hpaddr;
-	u64 va;
+	u64 vpn;
 	u64 vsid;
 	struct kvmppc_sid_map *map;
 	volatile u32 *pteg;
@@ -173,7 +173,7 @@ int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *orig_pte)
 	BUG_ON(!map);
 
 	vsid = map->host_vsid;
-	va = (vsid << SID_SHIFT) | (eaddr & ~ESID_MASK);
+	vpn = (vsid << (SID_SHIFT - VPN_SHIFT)) | ((eaddr & ~ESID_MASK) >> VPN_SHIFT)
 
 next_pteg:
 	if (rr == 16) {
@@ -244,11 +244,11 @@ next_pteg:
 	dprintk_mmu("KVM: %c%c Map 0x%llx: [%lx] 0x%llx (0x%llx) -> %lx\n",
 		    orig_pte->may_write ? 'w' : '-',
 		    orig_pte->may_execute ? 'x' : '-',
-		    orig_pte->eaddr, (ulong)pteg, va,
+		    orig_pte->eaddr, (ulong)pteg, vpn,
 		    orig_pte->vpage, hpaddr);
 
 	pte->slot = (ulong)&pteg[rr];
-	pte->host_va = va;
+	pte->host_vpn = vpn;
 	pte->pte = *orig_pte;
 	pte->pfn = hpaddr >> PAGE_SHIFT;
 
diff --git a/arch/powerpc/kvm/book3s_64_mmu_host.c b/arch/powerpc/kvm/book3s_64_mmu_host.c
index 0688b6b39585..4d72f9ebc554 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_host.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_host.c
@@ -33,7 +33,7 @@
 
 void kvmppc_mmu_invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte)
 {
-	ppc_md.hpte_invalidate(pte->slot, pte->host_va,
+	ppc_md.hpte_invalidate(pte->slot, pte->host_vpn,
 			       MMU_PAGE_4K, MMU_SEGSIZE_256M,
 			       false);
 }
@@ -80,8 +80,9 @@ static struct kvmppc_sid_map *find_sid_vsid(struct kvm_vcpu *vcpu, u64 gvsid)
 
 int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *orig_pte)
 {
+	unsigned long vpn;
 	pfn_t hpaddr;
-	ulong hash, hpteg, va;
+	ulong hash, hpteg;
 	u64 vsid;
 	int ret;
 	int rflags = 0x192;
@@ -117,7 +118,7 @@ int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *orig_pte)
 	}
 
 	vsid = map->host_vsid;
-	va = hpt_va(orig_pte->eaddr, vsid, MMU_SEGSIZE_256M);
+	vpn = hpt_vpn(orig_pte->eaddr, vsid, MMU_SEGSIZE_256M);
 
 	if (!orig_pte->may_write)
 		rflags |= HPTE_R_PP;
@@ -129,7 +130,7 @@ int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *orig_pte)
 	else
 		kvmppc_mmu_flush_icache(hpaddr >> PAGE_SHIFT);
 
-	hash = hpt_hash(va, PTE_SIZE, MMU_SEGSIZE_256M);
+	hash = hpt_hash(vpn, PTE_SIZE, MMU_SEGSIZE_256M);
 
 map_again:
 	hpteg = ((hash & htab_hash_mask) * HPTES_PER_GROUP);
@@ -141,7 +142,8 @@ map_again:
 			goto out;
 		}
 
-	ret = ppc_md.hpte_insert(hpteg, va, hpaddr, rflags, vflags, MMU_PAGE_4K, MMU_SEGSIZE_256M);
+	ret = ppc_md.hpte_insert(hpteg, vpn, hpaddr, rflags, vflags,
+				 MMU_PAGE_4K, MMU_SEGSIZE_256M);
 
 	if (ret < 0) {
 		/* If we couldn't map a primary PTE, try a secondary */
@@ -152,7 +154,8 @@ map_again:
 	} else {
 		struct hpte_cache *pte = kvmppc_mmu_hpte_cache_next(vcpu);
 
-		trace_kvm_book3s_64_mmu_map(rflags, hpteg, va, hpaddr, orig_pte);
+		trace_kvm_book3s_64_mmu_map(rflags, hpteg,
+					    vpn, hpaddr, orig_pte);
 
 		/* The ppc_md code may give us a secondary entry even though we
 		   asked for a primary. Fix up. */
@@ -162,7 +165,7 @@ map_again:
 		}
 
 		pte->slot = hpteg + (ret & 7);
-		pte->host_va = va;
+		pte->host_vpn = vpn;
 		pte->pte = *orig_pte;
 		pte->pfn = hpaddr >> PAGE_SHIFT;
 
diff --git a/arch/powerpc/kvm/trace.h b/arch/powerpc/kvm/trace.h
index 877186b7b1c3..ddb6a2149d44 100644
--- a/arch/powerpc/kvm/trace.h
+++ b/arch/powerpc/kvm/trace.h
@@ -189,7 +189,7 @@ TRACE_EVENT(kvm_book3s_mmu_map,
 	TP_ARGS(pte),
 
 	TP_STRUCT__entry(
-		__field(	u64,		host_va		)
+		__field(	u64,		host_vpn	)
 		__field(	u64,		pfn		)
 		__field(	ulong,		eaddr		)
 		__field(	u64,		vpage		)
@@ -198,7 +198,7 @@ TRACE_EVENT(kvm_book3s_mmu_map,
 	),
 
 	TP_fast_assign(
-		__entry->host_va	= pte->host_va;
+		__entry->host_vpn	= pte->host_vpn;
 		__entry->pfn		= pte->pfn;
 		__entry->eaddr		= pte->pte.eaddr;
 		__entry->vpage		= pte->pte.vpage;
@@ -208,8 +208,8 @@ TRACE_EVENT(kvm_book3s_mmu_map,
 					  (pte->pte.may_execute ? 0x1 : 0);
 	),
 
-	TP_printk("Map: hva=%llx pfn=%llx ea=%lx vp=%llx ra=%lx [%x]",
-		  __entry->host_va, __entry->pfn, __entry->eaddr,
+	TP_printk("Map: hvpn=%llx pfn=%llx ea=%lx vp=%llx ra=%lx [%x]",
+		  __entry->host_vpn, __entry->pfn, __entry->eaddr,
 		  __entry->vpage, __entry->raddr, __entry->flags)
 );
 
@@ -218,7 +218,7 @@ TRACE_EVENT(kvm_book3s_mmu_invalidate,
 	TP_ARGS(pte),
 
 	TP_STRUCT__entry(
-		__field(	u64,		host_va		)
+		__field(	u64,		host_vpn	)
 		__field(	u64,		pfn		)
 		__field(	ulong,		eaddr		)
 		__field(	u64,		vpage		)
@@ -227,7 +227,7 @@ TRACE_EVENT(kvm_book3s_mmu_invalidate,
 	),
 
 	TP_fast_assign(
-		__entry->host_va	= pte->host_va;
+		__entry->host_vpn	= pte->host_vpn;
 		__entry->pfn		= pte->pfn;
 		__entry->eaddr		= pte->pte.eaddr;
 		__entry->vpage		= pte->pte.vpage;
@@ -238,7 +238,7 @@ TRACE_EVENT(kvm_book3s_mmu_invalidate,
 	),
 
 	TP_printk("Flush: hva=%llx pfn=%llx ea=%lx vp=%llx ra=%lx [%x]",
-		  __entry->host_va, __entry->pfn, __entry->eaddr,
+		  __entry->host_vpn, __entry->pfn, __entry->eaddr,
 		  __entry->vpage, __entry->raddr, __entry->flags)
 );