Hi Sebastian,
On Fri, Jun 05, 2020 at 04:56:55PM +0200, Sebastian Ott wrote:
> Add a check to enforce that I/O virtual addresses picked by iommu API
> users stay within the domains geometry aperture.
>
> Signed-off-by: Sebastian Ott <seb...@amazon.de>
> ---
> drivers/iommu/amd_iommu.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
> index d2e79e27778e..6485e2081706 100644
> --- a/drivers/iommu/amd_iommu.c
> +++ b/drivers/iommu/amd_iommu.c
> @@ -2618,6 +2618,11 @@ static int amd_iommu_map(struct iommu_domain *dom,
> unsigned long iova,
> if (pgtable.mode == PAGE_MODE_NONE)
> return -EINVAL;
>
> + if (dom->geometry.force_aperture &&
> + (iova < dom->geometry.aperture_start ||
> + iova + page_size - 1 > dom->geometry.aperture_end))
> + return -EINVAL;
> +
> if (iommu_prot & IOMMU_READ)
> prot |= IOMMU_PROT_IR;
> if (iommu_prot & IOMMU_WRITE)
This patch need also make iommu_setup_dma_ops() aware of the aperture
limits.
Regards,
Joerg
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
