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SubjectRe: [PATCH kernel v10 08/34] vfio: powerpc/spapr: Use it_page_size
On Tue, May 12, 2015 at 01:38:57AM +1000, Alexey Kardashevskiy wrote:
>This makes use of the it_page_size from the iommu_table struct
>as page size can differ.
>
>This replaces missing IOMMU_PAGE_SHIFT macro in commented debug code
>as recently introduced IOMMU_PAGE_XXX macros do not include
>IOMMU_PAGE_SHIFT.
>
>Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
>Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
>[aw: for the vfio related changes]
>Acked-by: Alex Williamson <alex.williamson@redhat.com>

Reviewed-by: Gavin Shan <gwshan@linux.vnet.ibm.com>

Thanks,
Gavin

>---
> drivers/vfio/vfio_iommu_spapr_tce.c | 26 +++++++++++++-------------
> 1 file changed, 13 insertions(+), 13 deletions(-)
>
>diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c
>index 735b308..64300cc 100644
>--- a/drivers/vfio/vfio_iommu_spapr_tce.c
>+++ b/drivers/vfio/vfio_iommu_spapr_tce.c
>@@ -91,7 +91,7 @@ static int tce_iommu_enable(struct tce_container *container)
> * enforcing the limit based on the max that the guest can map.
> */
> down_write(&current->mm->mmap_sem);
>- npages = (tbl->it_size << IOMMU_PAGE_SHIFT_4K) >> PAGE_SHIFT;
>+ npages = (tbl->it_size << tbl->it_page_shift) >> PAGE_SHIFT;
> locked = current->mm->locked_vm + npages;
> lock_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT;
> if (locked > lock_limit && !capable(CAP_IPC_LOCK)) {
>@@ -120,7 +120,7 @@ static void tce_iommu_disable(struct tce_container *container)
>
> down_write(&current->mm->mmap_sem);
> current->mm->locked_vm -= (container->tbl->it_size <<
>- IOMMU_PAGE_SHIFT_4K) >> PAGE_SHIFT;
>+ container->tbl->it_page_shift) >> PAGE_SHIFT;
> up_write(&current->mm->mmap_sem);
> }
>
>@@ -215,7 +215,7 @@ static long tce_iommu_build(struct tce_container *container,
> tce, ret);
> break;
> }
>- tce += IOMMU_PAGE_SIZE_4K;
>+ tce += IOMMU_PAGE_SIZE(tbl);
> }
>
> if (ret)
>@@ -260,8 +260,8 @@ static long tce_iommu_ioctl(void *iommu_data,
> if (info.argsz < minsz)
> return -EINVAL;
>
>- info.dma32_window_start = tbl->it_offset << IOMMU_PAGE_SHIFT_4K;
>- info.dma32_window_size = tbl->it_size << IOMMU_PAGE_SHIFT_4K;
>+ info.dma32_window_start = tbl->it_offset << tbl->it_page_shift;
>+ info.dma32_window_size = tbl->it_size << tbl->it_page_shift;
> info.flags = 0;
>
> if (copy_to_user((void __user *)arg, &info, minsz))
>@@ -291,8 +291,8 @@ static long tce_iommu_ioctl(void *iommu_data,
> VFIO_DMA_MAP_FLAG_WRITE))
> return -EINVAL;
>
>- if ((param.size & ~IOMMU_PAGE_MASK_4K) ||
>- (param.vaddr & ~IOMMU_PAGE_MASK_4K))
>+ if ((param.size & ~IOMMU_PAGE_MASK(tbl)) ||
>+ (param.vaddr & ~IOMMU_PAGE_MASK(tbl)))
> return -EINVAL;
>
> /* iova is checked by the IOMMU API */
>@@ -307,8 +307,8 @@ static long tce_iommu_ioctl(void *iommu_data,
> return ret;
>
> ret = tce_iommu_build(container, tbl,
>- param.iova >> IOMMU_PAGE_SHIFT_4K,
>- tce, param.size >> IOMMU_PAGE_SHIFT_4K);
>+ param.iova >> tbl->it_page_shift,
>+ tce, param.size >> tbl->it_page_shift);
>
> iommu_flush_tce(tbl);
>
>@@ -334,17 +334,17 @@ static long tce_iommu_ioctl(void *iommu_data,
> if (param.flags)
> return -EINVAL;
>
>- if (param.size & ~IOMMU_PAGE_MASK_4K)
>+ if (param.size & ~IOMMU_PAGE_MASK(tbl))
> return -EINVAL;
>
> ret = iommu_tce_clear_param_check(tbl, param.iova, 0,
>- param.size >> IOMMU_PAGE_SHIFT_4K);
>+ param.size >> tbl->it_page_shift);
> if (ret)
> return ret;
>
> ret = tce_iommu_clear(container, tbl,
>- param.iova >> IOMMU_PAGE_SHIFT_4K,
>- param.size >> IOMMU_PAGE_SHIFT_4K);
>+ param.iova >> tbl->it_page_shift,
>+ param.size >> tbl->it_page_shift);
> iommu_flush_tce(tbl);
>
> return ret;
>--
>2.4.0.rc3.8.gfb3e7d5
>



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