From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e23smtp06.au.ibm.com (e23smtp06.au.ibm.com [202.81.31.148]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id EB97D1A0A44 for ; Fri, 13 Mar 2015 19:09:05 +1100 (AEDT) Received: from /spool/local by e23smtp06.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 13 Mar 2015 18:09:04 +1000 Received: from d23relay09.au.ibm.com (d23relay09.au.ibm.com [9.185.63.181]) by d23dlp03.au.ibm.com (Postfix) with ESMTP id 599F33578057 for ; Fri, 13 Mar 2015 19:09:00 +1100 (EST) Received: from d23av01.au.ibm.com (d23av01.au.ibm.com [9.190.234.96]) by d23relay09.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t2D88quO26214430 for ; Fri, 13 Mar 2015 19:09:00 +1100 Received: from d23av01.au.ibm.com (localhost [127.0.0.1]) by d23av01.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t2D88Q7c016571 for ; Fri, 13 Mar 2015 19:08:26 +1100 From: Alexey Kardashevskiy To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH kernel v6 06/29] vfio: powerpc/spapr: Disable DMA mappings on disabled container Date: Fri, 13 Mar 2015 19:07:14 +1100 Message-Id: <1426234057-16165-7-git-send-email-aik@ozlabs.ru> In-Reply-To: <1426234057-16165-1-git-send-email-aik@ozlabs.ru> References: <1426234057-16165-1-git-send-email-aik@ozlabs.ru> Cc: kvm@vger.kernel.org, Alexey Kardashevskiy , linux-kernel@vger.kernel.org, Alex Williamson , Paul Mackerras List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 c47b969..8a667cb 100644 --- a/drivers/vfio/vfio_iommu_spapr_tce.c +++ b/drivers/vfio/vfio_iommu_spapr_tce.c @@ -327,6 +327,9 @@ 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; @@ -371,6 +374,9 @@ 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