--- zzzz-none-000/linux-5.15.111/drivers/pci/msi.c	2023-05-11 14:00:40.000000000 +0000
+++ puma7-atom-6670-761/linux-5.15.111/drivers/pci/msi.c	2024-02-07 10:23:15.000000000 +0000
@@ -1568,3 +1568,25 @@
 		pci_write_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS,
 				      ctrl & ~PCI_MSIX_FLAGS_ENABLE);
 }
+
+#ifdef CONFIG_INTEL_PCI_MULTI_MSI
+void pci_enable_multi_msi_support(struct pci_dev *dev)
+{
+	dev->mmsi_support = 1;
+	dev_info(&dev->dev, "Multi MSI support enabled\n");
+}
+EXPORT_SYMBOL(pci_enable_multi_msi_support);
+
+void pci_disable_multi_msi_support(struct pci_dev *dev)
+{
+	dev->mmsi_support = 0;
+	dev_info(&dev->dev, "Multi MSI support disabled\n");
+}
+EXPORT_SYMBOL(pci_disable_multi_msi_support);
+
+int pci_multi_msi_support_enabled(struct pci_dev *dev)
+{
+	return dev->mmsi_support;
+}
+EXPORT_SYMBOL(pci_multi_msi_support_enabled);
+#endif /* CONFIG_INTEL_PCI_MULTI_MSI */