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Signed-off-by: Suravee Suthikulpanit --- drivers/iommu/amd/viommu.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/drivers/iommu/amd/viommu.c b/drivers/iommu/amd/viommu.c index 63360eef6b0d..14426649074f 100644 --- a/drivers/iommu/amd/viommu.c +++ b/drivers/iommu/amd/viommu.c @@ -173,6 +173,35 @@ u64 amd_viommu_get_vfmmio_addr(struct amd_iommu *iommu, u16 gid) } EXPORT_SYMBOL(amd_viommu_get_vfmmio_addr); +/* Set DTE for IOMMU device */ +static void set_iommu_dte(struct amd_iommu *iommu) +{ + u64 dte0, dte1; + u16 devid = iommu->devid; + struct pt_iommu_amdv1_hw_info pt_info; + struct protection_domain *pdom = iommu->viommu_pdom; + struct dev_table_entry *dev_table = get_dev_table(iommu); + + pt_iommu_amdv1_hw_info(&pdom->amdv1, &pt_info); + + pr_debug("%s: host_pt_root=%#llx, mode=%#x\n", + __func__, pt_info.host_pt_root, pt_info.mode); + + dte0 = FIELD_PREP(DTE_HOST_TRP, pt_info.host_pt_root >> 12); + dte0 |= (pt_info.mode & DEV_ENTRY_MODE_MASK) << DEV_ENTRY_MODE_SHIFT; + dte0 |= DTE_FLAG_IR | DTE_FLAG_IW | DTE_FLAG_V | DTE_FLAG_TV; + + dte1 = dev_table[devid].data[1]; + dte1 &= ~DTE_DOMID_MASK; + dte1 |= pdom->id; + + dev_table[devid].data[1] = dte1; + dev_table[devid].data[0] = dte0; + + iommu_flush_dte(iommu, devid); + amd_iommu_completion_wait(iommu); +} + int __init amd_viommu_init(struct amd_iommu *iommu) { int ret; @@ -195,5 +224,7 @@ int __init amd_viommu_init(struct amd_iommu *iommu) if (ret) return ret; + set_iommu_dte(iommu); + return 0; } -- 2.34.1