Messages in this thread Patch in this message | | | From | Thadeu Lima de Souza Cascardo <> | Subject | [PATCH] powernv: fix VFIO support with PHB3 | Date | Mon, 9 Dec 2013 14:41:01 -0200 |
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I have recently found out that no iommu_groups could be found under /sys/ on a P8. That prevents PCI passthrough from working.
During my investigation, I found out there seems to be a missing iommu_register_group for PHB3. The following patch seems to fix the problem. After applying it, I see iommu_groups under /sys/kernel/iommu_groups/, and can also bind vfio-pci to an adapter, which gives me a device at /dev/vfio/.
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com> ---
This is now applied on top of benh's tree, branch next.
Alexey, is this now OK for you?
Thanks. Cascardo.
--- arch/powerpc/platforms/powernv/pci-ioda.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 614356c..f0e6871 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -720,6 +720,7 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb, tbl->it_type = TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE; } iommu_init_table(tbl, phb->hose->node); + iommu_register_group(tbl, pci_domain_nr(pe->pbus), pe->pe_number); if (pe->pdev) set_iommu_table_base_and_group(&pe->pdev->dev, tbl); -- 1.7.1
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