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    Subject[PATCH RFC v1 11/15] iommu/virtio: Add headers for binding pasid table in iommu
    Date
    From: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>

    Add the required UAPI defines for binding pasid tables in virtio-iommu.
    This mode allows to hand stage-1 page tables over to the guest.

    Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
    [Vivek: Refactor to cleanup headers for invalidation]
    Signed-off-by: Vivek Gautam <vivek.gautam@arm.com>
    Cc: Joerg Roedel <joro@8bytes.org>
    Cc: Will Deacon <will.deacon@arm.com>
    Cc: Michael S. Tsirkin <mst@redhat.com>
    Cc: Robin Murphy <robin.murphy@arm.com>
    Cc: Jean-Philippe Brucker <jean-philippe@linaro.org>
    Cc: Eric Auger <eric.auger@redhat.com>
    Cc: Alex Williamson <alex.williamson@redhat.com>
    Cc: Kevin Tian <kevin.tian@intel.com>
    Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
    Cc: Liu Yi L <yi.l.liu@intel.com>
    Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
    Cc: Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>
    ---
    include/uapi/linux/virtio_iommu.h | 68 +++++++++++++++++++++++++++++++
    1 file changed, 68 insertions(+)

    diff --git a/include/uapi/linux/virtio_iommu.h b/include/uapi/linux/virtio_iommu.h
    index 8a0624bab4b2..3481e4a3dd24 100644
    --- a/include/uapi/linux/virtio_iommu.h
    +++ b/include/uapi/linux/virtio_iommu.h
    @@ -16,6 +16,7 @@
    #define VIRTIO_IOMMU_F_BYPASS 3
    #define VIRTIO_IOMMU_F_PROBE 4
    #define VIRTIO_IOMMU_F_MMIO 5
    +#define VIRTIO_IOMMU_F_ATTACH_TABLE 6

    struct virtio_iommu_range_64 {
    __le64 start;
    @@ -44,6 +45,8 @@ struct virtio_iommu_config {
    #define VIRTIO_IOMMU_T_MAP 0x03
    #define VIRTIO_IOMMU_T_UNMAP 0x04
    #define VIRTIO_IOMMU_T_PROBE 0x05
    +#define VIRTIO_IOMMU_T_ATTACH_TABLE 0x06
    +#define VIRTIO_IOMMU_T_INVALIDATE 0x07

    /* Status types */
    #define VIRTIO_IOMMU_S_OK 0x00
    @@ -82,6 +85,37 @@ struct virtio_iommu_req_detach {
    struct virtio_iommu_req_tail tail;
    };

    +struct virtio_iommu_req_attach_table {
    + struct virtio_iommu_req_head head;
    + __le32 domain;
    + __le32 endpoint;
    + __le16 format;
    + __u8 reserved[62];
    + struct virtio_iommu_req_tail tail;
    +};
    +
    +#define VIRTIO_IOMMU_PSTF_ARM_SMMU_V3_LINEAR 0x0
    +#define VIRTIO_IOMMU_PSTF_ARM_SMMU_V3_4KL2 0x1
    +#define VIRTIO_IOMMU_PSTF_ARM_SMMU_V3_64KL2 0x2
    +
    +#define VIRTIO_IOMMU_PSTF_ARM_SMMU_V3_DSS_TERM 0x0
    +#define VIRTIO_IOMMU_PSTF_ARM_SMMU_V3_DSS_BYPASS 0x1
    +#define VIRTIO_IOMMU_PSTF_ARM_SMMU_V3_DSS_0 0x2
    +
    +/* Arm SMMUv3 PASID Table Descriptor */
    +struct virtio_iommu_req_attach_pst_arm {
    + struct virtio_iommu_req_head head;
    + __le32 domain;
    + __le32 endpoint;
    + __le16 format;
    + __u8 s1fmt;
    + __u8 s1dss;
    + __le64 s1contextptr;
    + __le32 s1cdmax;
    + __u8 reserved[48];
    + struct virtio_iommu_req_tail tail;
    +};
    +
    #define VIRTIO_IOMMU_MAP_F_READ (1 << 0)
    #define VIRTIO_IOMMU_MAP_F_WRITE (1 << 1)
    #define VIRTIO_IOMMU_MAP_F_MMIO (1 << 2)
    @@ -188,6 +222,40 @@ struct virtio_iommu_req_probe {
    */
    };

    +#define VIRTIO_IOMMU_INVAL_G_DOMAIN (1 << 0)
    +#define VIRTIO_IOMMU_INVAL_G_PASID (1 << 1)
    +#define VIRTIO_IOMMU_INVAL_G_VA (1 << 2)
    +
    +#define VIRTIO_IOMMU_INV_T_IOTLB (1 << 0)
    +#define VIRTIO_IOMMU_INV_T_DEV_IOTLB (1 << 1)
    +#define VIRTIO_IOMMU_INV_T_PASID (1 << 2)
    +
    +#define VIRTIO_IOMMU_INVAL_F_PASID (1 << 0)
    +#define VIRTIO_IOMMU_INVAL_F_ARCHID (1 << 1)
    +#define VIRTIO_IOMMU_INVAL_F_LEAF (1 << 2)
    +
    +struct virtio_iommu_req_invalidate {
    + struct virtio_iommu_req_head head;
    + __le16 inv_gran;
    + __le16 inv_type;
    +
    + __le16 flags;
    + __u8 reserved1[2];
    + __le32 domain;
    +
    + __le32 pasid;
    + __u8 reserved2[4];
    +
    + __le64 archid;
    + __le64 virt_start;
    + __le64 nr_pages;
    +
    + /* Page size, in nr of bits, typically 12 for 4k, 30 for 2MB, etc.) */
    + __u8 granule;
    + __u8 reserved3[11];
    + struct virtio_iommu_req_tail tail;
    +};
    +
    /* Fault types */
    #define VIRTIO_IOMMU_FAULT_R_UNKNOWN 0
    #define VIRTIO_IOMMU_FAULT_R_DOMAIN 1
    --
    2.17.1
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