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Sat, 13 Jul 2019 06:01:17 +0000 (GMT) Received: from b03ledav006.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5B48CC605F; Sat, 13 Jul 2019 06:01:14 +0000 (GMT) Received: from morokweng.localdomain.com (unknown [9.85.135.203]) by b03ledav006.gho.boulder.ibm.com (Postfix) with ESMTP; Sat, 13 Jul 2019 06:01:14 +0000 (GMT) From: Thiago Jung Bauermann To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH v2 11/13] powerpc/pseries/iommu: Don't use dma_iommu_ops on secure guests Date: Sat, 13 Jul 2019 03:00:21 -0300 Message-Id: <20190713060023.8479-12-bauerman@linux.ibm.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190713060023.8479-1-bauerman@linux.ibm.com> References: <20190713060023.8479-1-bauerman@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-07-13_01:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=679 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1907130070 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Anshuman Khandual , Alexey Kardashevskiy , Mike Anderson , Ram Pai , linux-kernel@vger.kernel.org, Claudio Carvalho , Paul Mackerras , Christoph Hellwig , Thiago Jung Bauermann Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Secure guest memory is inacessible to devices so regular DMA isn't possible. In that case set devices' dma_map_ops to NULL so that the generic DMA code path will use SWIOTLB and DMA to bounce buffers. Signed-off-by: Thiago Jung Bauermann --- arch/powerpc/platforms/pseries/iommu.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c index 03bbb299320e..7d9550edb700 100644 --- a/arch/powerpc/platforms/pseries/iommu.c +++ b/arch/powerpc/platforms/pseries/iommu.c @@ -50,6 +50,7 @@ #include #include #include +#include #include "pseries.h" @@ -1332,7 +1333,10 @@ void iommu_init_early_pSeries(void) of_reconfig_notifier_register(&iommu_reconfig_nb); register_memory_notifier(&iommu_mem_nb); - set_pci_dma_ops(&dma_iommu_ops); + if (is_secure_guest()) + set_pci_dma_ops(NULL); + else + set_pci_dma_ops(&dma_iommu_ops); } static int __init disable_multitce(char *str)