These ioctl interfaces are used for updating device host-to-guest
domain ID mappings.
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@xxxxxxx>
---
drivers/iommu/amd/viommu.c | 95 ++++++++++++++++++++++++++++++++++++++
1 file changed, 95 insertions(+)
diff --git a/drivers/iommu/amd/viommu.c b/drivers/iommu/amd/viommu.c
index f6f0056c7fe6..1bcb895cffbf 100644
--- a/drivers/iommu/amd/viommu.c
+++ b/drivers/iommu/amd/viommu.c
@@ -520,6 +520,101 @@ int amd_viommu_iommu_destroy(struct amd_viommu_iommu_info *data)
}
EXPORT_SYMBOL(amd_viommu_iommu_destroy);
+/*
+ * Program the DomID via VFCTRL registers
+ * This function will be called during VM init via VFIO.
+ */
+static void set_domain_mapping(struct amd_iommu *iommu, u16 guestId, u16 hDomId, u16 gDomId)
+{
+ u64 val, tmp1, tmp2;
+ u8 __iomem *vfctrl = VIOMMU_VFCTRL_MMIO_BASE(iommu, guestId);
+
+ pr_debug("%s: iommu_id=%#x, gid=%#x, dom_id=%#x, gdom_id=%#x, val=%#llx\n",
+ __func__, pci_dev_id(iommu->dev), guestId, hDomId, gDomId, val);
+
+ tmp1 = gDomId;
+ tmp1 = ((tmp1 & 0xFFFFULL) << 46);
+ tmp2 = hDomId;
+ tmp2 = ((tmp2 & 0xFFFFULL) << 14);
+ val = tmp1 | tmp2 | 0x8000000000000001UL;
+ writeq(val, vfctrl + VIOMMU_VFCTRL_GUEST_DID_MAP_CONTROL1_OFFSET);
+ wbinvd_on_all_cpus();
+}
+
+u64 get_domain_mapping(struct amd_iommu *iommu, u16 gid, u16 gdom_id)
+{
+ void *addr;
+ u64 offset, val;
+ struct amd_iommu_vminfo *vminfo;
+
+ vminfo = get_vminfo(iommu, gid);
+ if (!vminfo)
+ return -EINVAL;
+
+ addr = vminfo->domid_table;
+ offset = gdom_id << 3;
+ val = *((u64 *)(addr + offset));
+
+ return val;
+}
+
+void dump_domain_mapping(struct amd_iommu *iommu, u16 gid, u16 gdom_id)
+{
+ void *addr;
+ u64 offset, val;
+ struct amd_iommu_vminfo *vminfo;
+
+ vminfo = get_vminfo(iommu, gid);
+ if (!vminfo)
+ return;
+
+ addr = vminfo->domid_table;
+ offset = gdom_id << 3;
+ val = *((u64 *)(addr + offset));
+
+ pr_debug("%s: offset=%#llx(val=%#llx)\n", __func__,
+ (unsigned long long)offset,
+ (unsigned long long)val);
+}
+
+static u16 viommu_get_hdev_id(struct amd_iommu *iommu, u16 guestId, u16 gdev_id)
+{
+ struct amd_iommu_vminfo *vminfo;
+ void *addr;
+ u64 offset;
+
+ vminfo = get_vminfo(iommu, guestId);
+ if (!vminfo)
+ return -1;
+
+ addr = vminfo->devid_table;
+ offset = gdev_id << 4;
+ return (*((u64 *)(addr + offset)) >> 24) & 0xFFFF;
+}
+
+int amd_viommu_domain_update(struct amd_viommu_dom_info *data, bool is_set)
+{
+ u16 hdom_id, hdev_id;
+ int gid = data->gid;
+ struct amd_iommu *iommu = get_amd_iommu_from_devid(data->iommu_id);
+ struct dev_table_entry *dev_table = get_dev_table(iommu);
+
+ if (!iommu)
+ return -ENODEV;
+
+ hdev_id = viommu_get_hdev_id(iommu, gid, data->gdev_id);
+ hdom_id = dev_table[hdev_id].data[1] & 0xFFFFULL;
+
+ if (is_set) {
+ set_domain_mapping(iommu, gid, hdom_id, data->gdom_id);
+ dump_domain_mapping(iommu, 0, data->gdom_id);
+ } else
+ clear_domain_mapping(iommu, gid, hdom_id, data->gdom_id);
+
+ return 0;
+}
+EXPORT_SYMBOL(amd_viommu_domain_update);
+
static void set_dte_viommu(struct amd_iommu *iommu, u16 hDevId, u16 gid, u16 gDevId)
{
u64 tmp, dte;
--
2.34.1
