Following LPC discussions, we now report reserved regions through iommu-group sysfs reserved_regions attribute file. Reserved regions are populated through the IOMMU get_resv_region callback (former get_dm_regions), now implemented by amd-iommu, intel-iommu and arm-smmu. The intel-iommu reports the [FEE0_0000h - FEF0_000h] MSI window as an IOMMU_RESV_NOMAP reserved region. arm-smmu reports the MSI window (arbitrarily located at 0x8000000 and 1MB large) and the PCI host bridge windows. The series integrates a not officially posted patch from Robin: "iommu/dma: Allow MSI-only cookies". This series currently does not address IRQ safety assessment. Best Regards Eric Git: complete series available at https://github.com/eauger/linux/tree/v4.9-rc5-reserved-rfc-v3 History: RFC v2 -> v3: - switch to an iommu-group sysfs API - use new dummy allocator provided by Robin - dummy allocator initialized by vfio-iommu-type1 after enumerating the reserved regions - at the moment ARM MSI base address/size is left unchanged compared to v2 - we currently report reserved regions and not usable IOVA regions as requested by Alex RFC v1 -> v2: - fix intel_add_reserved_regions - add mutex lock/unlock in vfio_iommu_type1 Eric Auger (10): iommu/dma: Allow MSI-only cookies iommu: Rename iommu_dm_regions into iommu_resv_regions iommu: Add new reserved IOMMU attributes iommu: iommu_alloc_resv_region iommu: Do not map reserved regions iommu: iommu_get_group_resv_regions iommu: Implement reserved_regions iommu-group sysfs file iommu/vt-d: Implement reserved region get/put callbacks iommu/arm-smmu: Implement reserved region get/put callbacks vfio/type1: Get MSI cookie drivers/iommu/amd_iommu.c | 20 +++--- drivers/iommu/arm-smmu.c | 52 +++++++++++++++ drivers/iommu/dma-iommu.c | 116 ++++++++++++++++++++++++++------- drivers/iommu/intel-iommu.c | 50 ++++++++++---- drivers/iommu/iommu.c | 141 ++++++++++++++++++++++++++++++++++++---- drivers/vfio/vfio_iommu_type1.c | 26 ++++++++ include/linux/dma-iommu.h | 7 ++ include/linux/iommu.h | 49 ++++++++++---- 8 files changed, 391 insertions(+), 70 deletions(-) -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
