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From:   Yong Wu <yong.wu@mediatek.com>
To:     Joerg Roedel <joro@8bytes.org>, Rob Herring <robh+dt@kernel.org>,
        "Matthias Brugger" <matthias.bgg@gmail.com>,
        Will Deacon <will@kernel.org>
CC:     Robin Murphy <robin.murphy@arm.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>,
        Tomasz Figa <tfiga@chromium.org>,
        <linux-mediatek@lists.infradead.org>,
        <srv_heupstream@mediatek.com>, <devicetree@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <iommu@lists.linux-foundation.org>,
        Hsin-Yi Wang <hsinyi@chromium.org>, <yong.wu@mediatek.com>,
        <youlin.pei@mediatek.com>, <anan.sun@mediatek.com>,
        <xueqi.zhang@mediatek.com>, <yen-chang.chen@mediatek.com>,
        "AngeloGioacchino Del Regno" 
        <angelogioacchino.delregno@collabora.com>,
        <mingyuan.ma@mediatek.com>, <yf.wang@mediatek.com>,
        <libo.kang@mediatek.com>, <chengci.xu@mediatek.com>
Subject: [PATCH v4 19/35] iommu/mediatek: Allow IOMMU_DOMAIN_UNMANAGED for PCIe VFIO
Date:   Tue, 25 Jan 2022 16:56:18 +0800
Message-ID: <20220125085634.17972-20-yong.wu@mediatek.com>
In-Reply-To: <20220125085634.17972-1-yong.wu@mediatek.com>
References: <20220125085634.17972-1-yong.wu@mediatek.com>
MIME-Version: 1.0
Content-Type: text/plain
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Allow the type IOMMU_DOMAIN_UNMANAGED since vfio_iommu_type1.c always call
iommu_domain_alloc. The PCIe EP works ok when going through vfio.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 drivers/iommu/mtk_iommu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index f676085af13d..cf042ab74fa7 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -446,7 +446,7 @@ static struct iommu_domain *mtk_iommu_domain_alloc(unsigned type)
 {
 	struct mtk_iommu_domain *dom;
 
-	if (type != IOMMU_DOMAIN_DMA)
+	if (type != IOMMU_DOMAIN_DMA && type != IOMMU_DOMAIN_UNMANAGED)
 		return NULL;
 
 	dom = kzalloc(sizeof(*dom), GFP_KERNEL);
-- 
2.18.0