Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932537AbbBPKIF (ORCPT ); Mon, 16 Feb 2015 05:08:05 -0500 Received: from e23smtp05.au.ibm.com ([202.81.31.147]:58759 "EHLO e23smtp05.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932319AbbBPKHu (ORCPT ); Mon, 16 Feb 2015 05:07:50 -0500 From: Alexey Kardashevskiy To: linuxppc-dev@lists.ozlabs.org Cc: Alexey Kardashevskiy , Benjamin Herrenschmidt , Paul Mackerras , Alex Williamson , Gavin Shan , Alexander Graf , linux-kernel@vger.kernel.org Subject: [PATCH v4 06/28] vfio: powerpc/spapr: Disable DMA mappings on disabled container Date: Mon, 16 Feb 2015 21:05:58 +1100 Message-Id: <1424081180-4494-7-git-send-email-aik@ozlabs.ru> X-Mailer: git-send-email 2.0.0 In-Reply-To: <1424081180-4494-1-git-send-email-aik@ozlabs.ru> References: <1424081180-4494-1-git-send-email-aik@ozlabs.ru> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15021610-0017-0000-0000-000000CE168B Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1322 Lines: 44 At the moment DMA map/unmap requests are handled irrespective to the container's state. This allows the user space to pin memory which it might not be allowed to pin. This adds checks to MAP/UNMAP that the container is enabled, otherwise -EPERM is returned. Signed-off-by: Alexey Kardashevskiy --- drivers/vfio/vfio_iommu_spapr_tce.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c index 2beeae5..67ea392 100644 --- a/drivers/vfio/vfio_iommu_spapr_tce.c +++ b/drivers/vfio/vfio_iommu_spapr_tce.c @@ -345,6 +345,9 @@ static long tce_iommu_ioctl(void *iommu_data, struct iommu_table *tbl = container->tbl; unsigned long tce; + if (!container->enabled) + return -EPERM; + if (!tbl) return -ENXIO; @@ -389,6 +392,9 @@ static long tce_iommu_ioctl(void *iommu_data, struct vfio_iommu_type1_dma_unmap param; struct iommu_table *tbl = container->tbl; + if (!container->enabled) + return -EPERM; + if (WARN_ON(!tbl)) return -ENXIO; -- 2.0.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/