diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 07b5f9af1eecef60c45282e7ecee2f89c2332fd8..096c24467b04ade658afe6dc04edec672451a463 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -4863,6 +4863,22 @@ static int  pci_quirk_wangxun_nic_acs(struct pci_dev *dev, u16 acs_flags)
 	return false;
 }
 
+/*
+ * Phytium 5000E SOC have no ACS capability, and on multi-function
+ * devices, peer-to-peer transactions are not be used between the functions.
+ * So add an ACS quirk for below devices to isolate functions.
+ */
+static int  pci_quirk_phytium_pcie_ports_acs(struct pci_dev *dev, u16 acs_flags)
+{
+		switch (dev->device) {
+		case 0x0100:
+			return pci_acs_ctrl_enabled(acs_flags,
+					PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF);
+		}
+
+		return false;
+}
+
 static const struct pci_dev_acs_enabled {
 	u16 vendor;
 	u16 device;
@@ -4961,10 +4977,14 @@ static const struct pci_dev_acs_enabled {
 	{ PCI_VENDOR_ID_AMPERE, 0xE00A, pci_quirk_xgene_acs },
 	{ PCI_VENDOR_ID_AMPERE, 0xE00B, pci_quirk_xgene_acs },
 	{ PCI_VENDOR_ID_AMPERE, 0xE00C, pci_quirk_xgene_acs },
-	/* because PLX switch Vendor id is 0x10b5 on phytium cpu */
-	{ 0x10b5, PCI_ANY_ID, pci_quirk_xgene_acs },
-	/* because rootcomplex Vendor id is 0x17cd on phytium cpu */
-	{ 0x17cd, PCI_ANY_ID, pci_quirk_xgene_acs },
+	/* Phytium Socs */
+	{ PCI_VENDOR_ID_PHYTIUM, PCI_ANY_ID, pci_quirk_phytium_pcie_ports_acs },
+#ifdef CONFIG_ARCH_PHYTIUM
+	/* PLX switch on phytium cpu */
+	{ PCI_VENDOR_ID_PLX, PCI_ANY_ID, pci_quirk_xgene_acs },
+	/* rootcomplex on phytium cpu */
+	{ PCI_VENDOR_ID_CDNS, PCI_ANY_ID, pci_quirk_xgene_acs },
+#endif
 	/* Broadcom multi-function device */
 	{ PCI_VENDOR_ID_BROADCOM, 0x16D7, pci_quirk_mf_endpoint_acs },
 	{ PCI_VENDOR_ID_BROADCOM, 0x1750, pci_quirk_mf_endpoint_acs },