linux-kernel - [PATCH RFC v1 01/11] uapi/virtio-iommu: Add page request grp-id and flags information

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Message-Id: <20210423095147.27922-2-vivek.gautam@arm.com>
Date:   Fri, 23 Apr 2021 15:21:37 +0530
From:   Vivek Gautam <vivek.gautam@....com>
To:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        iommu@...ts.linux-foundation.org,
        virtualization@...ts.linux-foundation.org
Cc:     joro@...tes.org, will.deacon@....com, mst@...hat.com,
        robin.murphy@....com, jean-philippe@...aro.org,
        eric.auger@...hat.com, kevin.tian@...el.com,
        jacob.jun.pan@...ux.intel.com, yi.l.liu@...el.com,
        Lorenzo.Pieralisi@....com, shameerali.kolothum.thodi@...wei.com,
        Vivek Gautam <vivek.gautam@....com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Subject: [PATCH RFC v1 01/11] uapi/virtio-iommu: Add page request grp-id and flags information

Add fault information for group-id and necessary flags for page
request faults that can be handled by page fault handler in
virtio-iommu driver.

Signed-off-by: Vivek Gautam <vivek.gautam@....com>
Cc: Joerg Roedel <joro@...tes.org>
Cc: Will Deacon <will.deacon@....com>
Cc: Robin Murphy <robin.murphy@....com>
Cc: Jean-Philippe Brucker <jean-philippe@...aro.org>
Cc: Eric Auger <eric.auger@...hat.com>
Cc: Alex Williamson <alex.williamson@...hat.com>
Cc: Kevin Tian <kevin.tian@...el.com>
Cc: Jacob Pan <jacob.jun.pan@...ux.intel.com>
Cc: Liu Yi L <yi.l.liu@...el.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Cc: Shameerali Kolothum Thodi <shameerali.kolothum.thodi@...wei.com>
---
 include/uapi/linux/virtio_iommu.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/include/uapi/linux/virtio_iommu.h b/include/uapi/linux/virtio_iommu.h
index f8bf927a0689..accc3318ce46 100644
--- a/include/uapi/linux/virtio_iommu.h
+++ b/include/uapi/linux/virtio_iommu.h
@@ -307,14 +307,27 @@ struct virtio_iommu_req_invalidate {
 #define VIRTIO_IOMMU_FAULT_F_DMA_UNRECOV	1
 #define VIRTIO_IOMMU_FAULT_F_PAGE_REQ		2
 
+#define VIRTIO_IOMMU_FAULT_PRQ_F_PASID_VALID		(1 << 0)
+#define VIRTIO_IOMMU_FAULT_PRQ_F_LAST_PAGE		(1 << 1)
+#define VIRTIO_IOMMU_FAULT_PRQ_F_PRIV_DATA		(1 << 2)
+#define VIRTIO_IOMMU_FAULT_PRQ_F_NEEDS_PASID		(1 << 3)
+
+#define VIRTIO_IOMMU_FAULT_UNREC_F_PASID_VALID		(1 << 0)
+#define VIRTIO_IOMMU_FAULT_UNREC_F_ADDR_VALID		(1 << 1)
+#define VIRTIO_IOMMU_FAULT_UNREC_F_FETCH_ADDR_VALID	(1 << 2)
+
 struct virtio_iommu_fault {
 	__u8					reason;
 	__u8					reserved[3];
 	__le16					flt_type;
 	__u8					reserved2[2];
+	/* flags is actually permission flags */
 	__le32					flags;
+	/* flags for PASID and Page request handling info */
+	__le32					pr_evt_flags;
 	__le32					endpoint;
 	__le32					pasid;
+	__le32					grpid;
 	__u8					reserved3[4];
 	__le64					address;
 	__u8					reserved4[8];
-- 
2.17.1