From: David Matlack Date: Wed, 14 Jan 2026 21:12:52 +0000 (+0000) Subject: vfio: selftests: Drop IOMMU mapping size assertions for VFIO_TYPE1_IOMMU X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1c588bca3bd5b39c93a28a5986bf82ebfb05eec2;p=thirdparty%2Fkernel%2Fstable.git vfio: selftests: Drop IOMMU mapping size assertions for VFIO_TYPE1_IOMMU Drop the assertions about IOMMU mappings sizes for VFIO_TYPE1_IOMMU modes (both the VFIO mode and the iommufd compatibility mode). These assertions fail when CONFIG_IOMMUFD_VFIO_CONTAINER is enabled, since iommufd compatibility mode provides different huge page behavior than VFIO for VFIO_TYPE1_IOMMU. VFIO_TYPE1_IOMMU is an old enough interface that it's not worth changing the behavior of VFIO and iommufd to match nor care about the IOMMU mapping sizes. Cc: Jason Gunthorpe Link: https://lore.kernel.org/kvm/20260109143830.176dc279@shazbot.org/ Signed-off-by: David Matlack Link: https://lore.kernel.org/r/20260114211252.2581145-1-dmatlack@google.com Signed-off-by: Alex Williamson --- diff --git a/tools/testing/selftests/vfio/vfio_dma_mapping_test.c b/tools/testing/selftests/vfio/vfio_dma_mapping_test.c index 3d2f44f9c62f..abb170bdcef7 100644 --- a/tools/testing/selftests/vfio/vfio_dma_mapping_test.c +++ b/tools/testing/selftests/vfio/vfio_dma_mapping_test.c @@ -161,12 +161,8 @@ TEST_F(vfio_dma_mapping_test, dma_map_unmap) if (rc == -EOPNOTSUPP) goto unmap; - /* - * IOMMUFD compatibility-mode does not support huge mappings when - * using VFIO_TYPE1_IOMMU. - */ - if (!strcmp(variant->iommu_mode, MODE_IOMMUFD_COMPAT_TYPE1)) - mapping_size = SZ_4K; + if (self->iommu->mode->iommu_type == VFIO_TYPE1_IOMMU) + goto unmap; ASSERT_EQ(0, rc); printf("Found IOMMU mappings for IOVA 0x%lx:\n", region.iova);