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authorAlexey Kardashevskiy <aik@ozlabs.ru>2018-07-17 10:19:12 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2018-07-18 09:17:07 +0300
commit1463edca6734d42ab4406fa2896e20b45478ea36 (patch)
treeed638bb0b8e1a83288d196343a9f38a35ad11b12 /drivers/vfio
parent941d810725ad48cc21948f4cff8cf70fa2a67cf9 (diff)
downloadlinux-1463edca6734d42ab4406fa2896e20b45478ea36.tar.xz
vfio/spapr: Use IOMMU pageshift rather than pagesize
The size is always equal to 1 page so let's use this. Later on this will be used for other checks which use page shifts to check the granularity of access. This should cause no behavioral change. Cc: stable@vger.kernel.org # v4.12+ Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Acked-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'drivers/vfio')
-rw-r--r--drivers/vfio/vfio_iommu_spapr_tce.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c
index 759a5bdd40e1..2da5f054257a 100644
--- a/drivers/vfio/vfio_iommu_spapr_tce.c
+++ b/drivers/vfio/vfio_iommu_spapr_tce.c
@@ -457,13 +457,13 @@ static void tce_iommu_unuse_page(struct tce_container *container,
}
static int tce_iommu_prereg_ua_to_hpa(struct tce_container *container,
- unsigned long tce, unsigned long size,
+ unsigned long tce, unsigned long shift,
unsigned long *phpa, struct mm_iommu_table_group_mem_t **pmem)
{
long ret = 0;
struct mm_iommu_table_group_mem_t *mem;
- mem = mm_iommu_lookup(container->mm, tce, size);
+ mem = mm_iommu_lookup(container->mm, tce, 1ULL << shift);
if (!mem)
return -EINVAL;
@@ -487,7 +487,7 @@ static void tce_iommu_unuse_page_v2(struct tce_container *container,
if (!pua)
return;
- ret = tce_iommu_prereg_ua_to_hpa(container, *pua, IOMMU_PAGE_SIZE(tbl),
+ ret = tce_iommu_prereg_ua_to_hpa(container, *pua, tbl->it_page_shift,
&hpa, &mem);
if (ret)
pr_debug("%s: tce %lx at #%lx was not cached, ret=%d\n",
@@ -611,7 +611,7 @@ static long tce_iommu_build_v2(struct tce_container *container,
entry + i);
ret = tce_iommu_prereg_ua_to_hpa(container,
- tce, IOMMU_PAGE_SIZE(tbl), &hpa, &mem);
+ tce, tbl->it_page_shift, &hpa, &mem);
if (ret)
break;