On Fri, Jun 08, 2018 at 03:46:30PM +1000, Alexey Kardashevskiy wrote:
> 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.
>
> Signed-off-by: Alexey Kardashevskiy <aik@xxxxxxxxx>
Reviewed-by: David Gibson <david@xxxxxxxxxxxxxxxxxxxxx>
> ---
> arch/powerpc/include/asm/iommu.h | 2 +-
> arch/powerpc/kvm/book3s_64_vio.c | 11 ++++++-----
> arch/powerpc/kvm/book3s_64_vio_hv.c | 10 +++++-----
> drivers/vfio/vfio_iommu_spapr_tce.c | 19 +++++++++----------
> 4 files changed, 21 insertions(+), 21 deletions(-)
>
> diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h
> index 20febe0..803ac70 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 80ead38..1dbca4b 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 635f3ca..18109f3 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;
> }
> diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c
> index 47071f3..81f48114 100644
> --- a/drivers/vfio/vfio_iommu_spapr_tce.c
> +++ b/drivers/vfio/vfio_iommu_spapr_tce.c
> @@ -231,7 +231,7 @@ static long tce_iommu_userspace_view_alloc(struct iommu_table *tbl,
> decrement_locked_vm(mm, cb >> PAGE_SHIFT);
> return -ENOMEM;
> }
> - tbl->it_userspace = uas;
> + tbl->it_userspace = (__be64 *) uas;
>
> return 0;
> }
> @@ -494,20 +494,20 @@ static void tce_iommu_unuse_page_v2(struct tce_container *container,
> struct mm_iommu_table_group_mem_t *mem = NULL;
> int ret;
> unsigned long hpa = 0;
> - unsigned long *pua = IOMMU_TABLE_USERSPACE_ENTRY(tbl, entry);
> + __be64 *pua = IOMMU_TABLE_USERSPACE_ENTRY(tbl, entry);
>
> if (!pua)
> return;
>
> - ret = tce_iommu_prereg_ua_to_hpa(container, *pua, IOMMU_PAGE_SIZE(tbl),
> - &hpa, &mem);
> + ret = tce_iommu_prereg_ua_to_hpa(container, be64_to_cpu(*pua),
> + IOMMU_PAGE_SIZE(tbl), &hpa, &mem);
> if (ret)
> - pr_debug("%s: tce %lx at #%lx was not cached, ret=%d\n",
> - __func__, *pua, entry, ret);
> + pr_debug("%s: tce %llx at #%lx was not cached, ret=%d\n",
> + __func__, be64_to_cpu(*pua), entry, ret);
> if (mem)
> mm_iommu_mapped_dec(mem);
>
> - *pua = 0;
> + *pua = cpu_to_be64(0);
> }
>
> static int tce_iommu_clear(struct tce_container *container,
> @@ -616,8 +616,7 @@ static long tce_iommu_build_v2(struct tce_container *container,
>
> for (i = 0; i < pages; ++i) {
> struct mm_iommu_table_group_mem_t *mem = NULL;
> - unsigned long *pua = IOMMU_TABLE_USERSPACE_ENTRY(tbl,
> - entry + i);
> + __be64 *pua = IOMMU_TABLE_USERSPACE_ENTRY(tbl, entry + i);
>
> ret = tce_iommu_prereg_ua_to_hpa(container,
> tce, IOMMU_PAGE_SIZE(tbl), &hpa, &mem);
> @@ -650,7 +649,7 @@ static long tce_iommu_build_v2(struct tce_container *container,
> if (dirtmp != DMA_NONE)
> tce_iommu_unuse_page_v2(container, tbl, entry + i);
>
> - *pua = tce;
> + *pua = cpu_to_be64(tce);
>
> tce += IOMMU_PAGE_SIZE(tbl);
> }
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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