linux-kernel - [RFC PATCH 02/11] powerpc/svm: Select CONFIG_DMA_DIRECT_OPS and CONFIG

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Date:   Thu, 23 Aug 2018 23:59:24 -0300
From:   Thiago Jung Bauermann <bauerman@...ux.ibm.com>
To:     linuxppc-dev@...ts.ozlabs.org
Cc:     iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        Alexey Kardashevskiy <aik@...abs.ru>,
        Anshuman Khandual <anshuman.linux@...il.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Christoph Hellwig <hch@....de>,
        Michael Ellerman <mpe@...erman.id.au>,
        Mike Anderson <andmike@...ux.ibm.com>,
        Paul Mackerras <paulus@...ba.org>,
        Ram Pai <linuxram@...ibm.com>,
        Anshuman Khandual <khandual@...ux.vnet.ibm.com>,
        Thiago Jung Bauermann <bauerman@...ux.ibm.com>
Subject: [RFC PATCH 02/11] powerpc/svm: Select CONFIG_DMA_DIRECT_OPS and CONFIG_SWIOTLB

From: Anshuman Khandual <khandual@...ux.vnet.ibm.com>

Ultravisor based secure guest platforms will use generic SWIOTLB DMA API
(i.e swiotlb_dma_ops structure) available under the CONFIG_DMA_DIRECT_OPS
config. Also base CONFIG_SWIOTLB needs to be explicitly selected as well.
Select both these config options on powerpc server platforms with secure
guest support.

Signed-off-by: Anshuman Khandual <khandual@...ux.vnet.ibm.com>
Signed-off-by: Thiago Jung Bauermann <bauerman@...ux.ibm.com>
---
 arch/powerpc/Kconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index f786c962edf0..90f73d15f58a 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -444,6 +444,8 @@ config PPC_SVM
        bool "Secure virtual machine (SVM) support for POWERPC"
        default n
        depends on PPC_PSERIES
+       select DMA_DIRECT_OPS
+       select SWIOTLB
        help
          Support secure guests on POWERPC. There are certain POWER platforms
 	 which support secure guests with the help of an Ultravisor executing