Those 2 patches are bug fix for VFIO EEH support, which isn't merged yet though all reviewers gave their ack. So I'm sending this to avoid revert or something like that.
The problem is that dma_offset/iommu_table_base are sharing same memory location. When disabling bypass mode, we missed to restore iommu_table_base. EEH is utilizing that to translate IOMMU group ID to PE. The patches fix the issue. Another issue is that we're searching all online PCI devices for translating IOMMU group ID to PE. That's incorrect since we're uncertain that one speicific device (except those in current IOMMU group) is running in bypassed mode or not. So we should have search current IOMMU group. It should be applied on top of unmerged VFIO EEH support patchset: http://patchwork.ozlabs.org/patch/357665/ Gavin Shan (2): powerpc/powernv: Fix IOMMU table for VFIO dev powerpc/eeh: Fetch IOMMU table in reliable way arch/powerpc/kernel/eeh.c | 33 ++++++++++++++++++++----------- arch/powerpc/platforms/powernv/pci-ioda.c | 30 +++++++++++++++++++--------- 2 files changed, 43 insertions(+), 20 deletions(-) -- 1.8.3.2 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
