1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c
index 2e8b187956bc..429d6de1dde7 100644
--- a/drivers/misc/cxl/pci.c
+++ b/drivers/misc/cxl/pci.c
@@ -1742,6 +1742,15 @@ static int cxl_configure_adapter(struct cxl *adapter, struct pci_dev *dev)
         /* Required for devices using CAPP DMA mode, harmless for others */
         pci_set_master(dev);
 
+        adapter->tunneled_ops_supported = false;
+
+        if (cxl_is_power9()) {
+                if (pnv_pci_set_tunnel_bar(dev, 0x00020000E0000000ull, 1))
+                        dev_info(&dev->dev, "Tunneled operations unsupported\n");
+                else
+                        adapter->tunneled_ops_supported = true;
+        }
+
         if ((rc = pnv_phb_to_cxl_mode(dev, adapter->native->sl_ops->capi_mode)))
                 goto err;
 
@@ -1768,6 +1777,9 @@ static void cxl_deconfigure_adapter(struct cxl *adapter)
 {
         struct pci_dev *pdev = to_pci_dev(adapter->dev.parent);
 
+        if (cxl_is_power9())
+                pnv_pci_set_tunnel_bar(pdev, 0x00020000E0000000ull, 0);
+
         cxl_native_release_psl_err_irq(adapter);
         cxl_unmap_adapter_regs(adapter);