KVM: PPC: Make iommu_table::it_userspace big endian

We are going to reuse multilevel TCE code for the userspace copy of
the TCE table and since it is big endian, let's make the copy big endian
too.

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Acked-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

3 files changed, 12 insertions, 11 deletions

diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h
index 20febe0b7f32..803ac70ecedf 100644
--- a/arch/powerpc/include/asm/iommu.h
+++ b/arch/powerpc/include/asm/iommu.h
@@ -117,7 +117,7 @@ struct iommu_table {
 	unsigned long *it_map;       /* A simple allocation bitmap for now */
 	unsigned long  it_page_shift;/* table iommu page size */
 	struct list_head it_group_list;/* List of iommu_table_group_link */
-	unsigned long *it_userspace; /* userspace view of the table */
+	__be64 *it_userspace; /* userspace view of the table */
 	struct iommu_table_ops *it_ops;
 	struct kref    it_kref;
 };
diff --git a/arch/powerpc/kvm/book3s_64_vio.c b/arch/powerpc/kvm/book3s_64_vio.c
index d066e37551ec..8b9aaf24b0a2 100644
--- a/arch/powerpc/kvm/book3s_64_vio.c
+++ b/arch/powerpc/kvm/book3s_64_vio.c
@@ -378,19 +378,19 @@ static long kvmppc_tce_iommu_mapped_dec(struct kvm *kvm,
 {
 	struct mm_iommu_table_group_mem_t *mem = NULL;
 	const unsigned long pgsize = 1ULL << tbl->it_page_shift;
-	unsigned long *pua = IOMMU_TABLE_USERSPACE_ENTRY(tbl, entry);
+	__be64 *pua = IOMMU_TABLE_USERSPACE_ENTRY(tbl, entry);
 
 	if (!pua)
 		/* it_userspace allocation might be delayed */
 		return H_TOO_HARD;
 
-	mem = mm_iommu_lookup(kvm->mm, *pua, pgsize);
+	mem = mm_iommu_lookup(kvm->mm, be64_to_cpu(*pua), pgsize);
 	if (!mem)
 		return H_TOO_HARD;
 
 	mm_iommu_mapped_dec(mem);
 
-	*pua = 0;
+	*pua = cpu_to_be64(0);
 
 	return H_SUCCESS;
 }
@@ -437,7 +437,8 @@ long kvmppc_tce_iommu_do_map(struct kvm *kvm, struct iommu_table *tbl,
 		enum dma_data_direction dir)
 {
 	long ret;
-	unsigned long hpa, *pua = IOMMU_TABLE_USERSPACE_ENTRY(tbl, entry);
+	unsigned long hpa;
+	__be64 *pua = IOMMU_TABLE_USERSPACE_ENTRY(tbl, entry);
 	struct mm_iommu_table_group_mem_t *mem;
 
 	if (!pua)
@@ -464,7 +465,7 @@ long kvmppc_tce_iommu_do_map(struct kvm *kvm, struct iommu_table *tbl,
 	if (dir != DMA_NONE)
 		kvmppc_tce_iommu_mapped_dec(kvm, tbl, entry);
 
-	*pua = ua;
+	*pua = cpu_to_be64(ua);
 
 	return 0;
 }
diff --git a/arch/powerpc/kvm/book3s_64_vio_hv.c b/arch/powerpc/kvm/book3s_64_vio_hv.c
index 925fc316a104..236f74b210a7 100644
--- a/arch/powerpc/kvm/book3s_64_vio_hv.c
+++ b/arch/powerpc/kvm/book3s_64_vio_hv.c
@@ -200,7 +200,7 @@ static long kvmppc_rm_tce_iommu_mapped_dec(struct kvm *kvm,
 {
 	struct mm_iommu_table_group_mem_t *mem = NULL;
 	const unsigned long pgsize = 1ULL << tbl->it_page_shift;
-	unsigned long *pua = IOMMU_TABLE_USERSPACE_ENTRY(tbl, entry);
+	__be64 *pua = IOMMU_TABLE_USERSPACE_ENTRY(tbl, entry);
 
 	if (!pua)
 		/* it_userspace allocation might be delayed */
@@ -210,13 +210,13 @@ static long kvmppc_rm_tce_iommu_mapped_dec(struct kvm *kvm,
 	if (WARN_ON_ONCE_RM(!pua))
 		return H_HARDWARE;
 
-	mem = mm_iommu_lookup_rm(kvm->mm, *pua, pgsize);
+	mem = mm_iommu_lookup_rm(kvm->mm, be64_to_cpu(*pua), pgsize);
 	if (!mem)
 		return H_TOO_HARD;
 
 	mm_iommu_mapped_dec(mem);
 
-	*pua = 0;
+	*pua = cpu_to_be64(0);
 
 	return H_SUCCESS;
 }
@@ -268,7 +268,7 @@ static long kvmppc_rm_tce_iommu_do_map(struct kvm *kvm, struct iommu_table *tbl,
 {
 	long ret;
 	unsigned long hpa = 0;
-	unsigned long *pua = IOMMU_TABLE_USERSPACE_ENTRY(tbl, entry);
+	__be64 *pua = IOMMU_TABLE_USERSPACE_ENTRY(tbl, entry);
 	struct mm_iommu_table_group_mem_t *mem;
 
 	if (!pua)
@@ -302,7 +302,7 @@ static long kvmppc_rm_tce_iommu_do_map(struct kvm *kvm, struct iommu_table *tbl,
 	if (dir != DMA_NONE)
 		kvmppc_rm_tce_iommu_mapped_dec(kvm, tbl, entry);
 
-	*pua = ua;
+	*pua = cpu_to_be64(ua);
 
 	return 0;
 }