From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161067Ab3LFMV4 (ORCPT ); Fri, 6 Dec 2013 07:21:56 -0500 Received: from e24smtp04.br.ibm.com ([32.104.18.25]:47041 "EHLO e24smtp04.br.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161052Ab3LFMVx (ORCPT ); Fri, 6 Dec 2013 07:21:53 -0500 From: Thadeu Lima de Souza Cascardo To: benh@kernel.crashing.org Cc: paulus@samba.org, shangw@linux.vnet.ibm.com, aik@ozlabs.ru, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Thadeu Lima de Souza Cascardo Subject: [PATCH] powernv: fix VFIO support with PHB3 Date: Fri, 6 Dec 2013 10:21:44 -0200 Message-Id: <1386332504-18339-1-git-send-email-cascardo@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.1 X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13120612-8936-0000-0000-00000C15350F Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- 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 084cdfa..2c6d173 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); -- 1.7.1