On Wed, Oct 04, 2017 at 04:02:31AM +0300, Dmitry Osipenko wrote: > Due to a bug in IOVA allocator, page mapping could accidentally overwritten. > We can catch this case by checking 'VALID' bit of GART's page entry prior to > mapping of a page. Since that check introduces a noticeable performance > impact, it should be enabled explicitly by a new CONFIG_TEGRA_IOMMU_GART_DEBUG > option.
Which bug in the IOVA allocator are you talking about? Joerg _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu