• Shameerali Kolothum Thodi's avatar
    arm64: dts: hisi: Disable hisilicon smmu node on hip06/hip07 · 17f21343
    Shameerali Kolothum Thodi authored
    The HiSilicon erratum 161010801 describes the limitation of
    HiSilicon platforms hip06/hip07 to support the SMMUv3 mappings
    for MSI transactions.
    
    PCIe controller on these platforms has to differentiate the
    MSI payload against other DMA payload and has to modify the
    MSI  payload. This makes it difficult for these platforms to
    have SMMU translation for MSI. In order to workaround this,
    ARM SMMUv3 driver requires a quirk to treat the MSI regions
    separately. Such a quirk is currently missing for DT based
    systems and therefore we need to explicitly disable the
    hip06/hip07 smmu entries in dts.
    Signed-off-by: default avatarShameer Kolothum <shameerali.kolothum.thodi@huawei.com>
    Signed-off-by: default avatarWei Xu <xuwei5@hisilicon.com>
    17f21343
hip07.dtsi 37.9 KB