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authorThadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>2013-12-09 17:41:01 +0100
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-12-10 01:28:38 +0100
commit08607afba64cc7a14d22b8aa2837d00f1d877d83 (patch)
treec56b0d782a094c9d18a014a268b5f10a3cbba1d8 /arch
parentpowerpc/52xx: Re-enable bestcomm driver in defconfigs (diff)
downloadlinux-08607afba64cc7a14d22b8aa2837d00f1d877d83.tar.xz
linux-08607afba64cc7a14d22b8aa2837d00f1d877d83.zip
powernv: Fix VFIO support with PHB3
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> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/platforms/powernv/pci-ioda.c1
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 084cdfa40682..2c6d173842b2 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(&pe->pdev->dev, tbl);