lkml.org 
[lkml]   [2019]   [Aug]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v10 07/23] iommu/io-pgtable-arm-v7s: Use ias/oas to check the valid iova/pa
On Wed, Aug 21, 2019 at 09:53:10PM +0800, Yong Wu wrote:
> Use ias/oas to check the valid iova/pa. Synchronize this checking with
> io-pgtable-arm.c.
>
> Signed-off-by: Yong Wu <yong.wu@mediatek.com>
> ---
> drivers/iommu/io-pgtable-arm-v7s.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/iommu/io-pgtable-arm-v7s.c b/drivers/iommu/io-pgtable-arm-v7s.c
> index 72f1880..fa1b38f 100644
> --- a/drivers/iommu/io-pgtable-arm-v7s.c
> +++ b/drivers/iommu/io-pgtable-arm-v7s.c
> @@ -504,7 +504,8 @@ static int arm_v7s_map(struct io_pgtable_ops *ops, unsigned long iova,
> if (!(prot & (IOMMU_READ | IOMMU_WRITE)))
> return 0;
>
> - if (WARN_ON(upper_32_bits(iova) || upper_32_bits(paddr)))
> + if (WARN_ON(iova >= (1ULL << data->iop.cfg.ias) ||
> + paddr >= (1ULL << data->iop.cfg.oas)))
> return -ERANGE;

Acked-by: Will Deacon <will@kernel.org>

Will

\
 
 \ /
  Last update: 2019-08-21 17:26    [W:0.184 / U:1.372 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site