Hi,
On 13/09/2016 15:26, Robin Murphy wrote:
> On machines with no 32-bit addressable RAM whatsoever, we shouldn't
> even touch the v7s format as it's never going to work.
>
> Fixes: e5fc9753b1a8 ("iommu/io-pgtable: Add ARMv7 short descriptor support")
> Reported-by: Eric Auger <[email protected]>
> Signed-off-by: Robin Murphy <[email protected]>
> ---
> drivers/iommu/io-pgtable-arm-v7s.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/iommu/io-pgtable-arm-v7s.c
> b/drivers/iommu/io-pgtable-arm-v7s.c
> index def8ca1c982d..b7759a48f4ed 100644
> --- a/drivers/iommu/io-pgtable-arm-v7s.c
> +++ b/drivers/iommu/io-pgtable-arm-v7s.c
> @@ -633,6 +633,9 @@ static struct io_pgtable *arm_v7s_alloc_pgtable(struct
> io_pgtable_cfg *cfg,
> {
> struct arm_v7s_io_pgtable *data;
>
> + if (upper_32_bits(PHYS_OFFSET))
> + return NULL;
> +
> if (cfg->ias > ARM_V7S_ADDR_BITS || cfg->oas > ARM_V7S_ADDR_BITS)
> return NULL;
>
>
Fixes the oops on AMD Overdrive
(CONFIG_IOMMU_IO_PGTABLE_ARMV7S_SELFTEST=y and no DMA_API)
Tested-by: Eric Auger <[email protected]>
Thanks
Eric
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