Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755832AbbDJGjY (ORCPT ); Fri, 10 Apr 2015 02:39:24 -0400 Received: from e23smtp05.au.ibm.com ([202.81.31.147]:49189 "EHLO e23smtp05.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752551AbbDJGcr (ORCPT ); Fri, 10 Apr 2015 02:32:47 -0400 From: Alexey Kardashevskiy To: linuxppc-dev@lists.ozlabs.org Cc: Alexey Kardashevskiy , Benjamin Herrenschmidt , Paul Mackerras , Alex Williamson , linux-kernel@vger.kernel.org Subject: [PATCH kernel v8 06/31] vfio: powerpc/spapr: Disable DMA mappings on disabled container Date: Fri, 10 Apr 2015 16:30:48 +1000 Message-Id: <1428647473-11738-7-git-send-email-aik@ozlabs.ru> X-Mailer: git-send-email 2.0.0 In-Reply-To: <1428647473-11738-1-git-send-email-aik@ozlabs.ru> References: <1428647473-11738-1-git-send-email-aik@ozlabs.ru> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15041006-0017-0000-0000-0000010DA9AD 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 9448e39..c137bb3 100644 --- a/drivers/vfio/vfio_iommu_spapr_tce.c +++ b/drivers/vfio/vfio_iommu_spapr_tce.c @@ -325,6 +325,9 @@ 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; @@ -369,6 +372,9 @@ 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/