diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
index 0c00c87bb9dd0cf94b4145ad5c2ef1328796c085..35b2e50f17fbfedc220f50c5162d42cec73160b5 100644
--- a/arch/arm64/include/asm/io.h
+++ b/arch/arm64/include/asm/io.h
@@ -172,6 +172,16 @@ extern void __iomem *ioremap_cache(phys_addr_t phys_addr, size_t size);
 #define ioremap_wt(addr, size)		__ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRE))
 #define iounmap				__iounmap
 
+/*
+ * PCI configuration space mapping function.
+ *
+ * The PCI specification disallows posted write configuration transactions.
+ * Add an arch specific pci_remap_cfgspace() definition that is implemented
+ * through nGnRnE device memory attribute as recommended by the ARM v8
+ * Architecture reference manual Issue A.k B2.8.2 "Device memory".
+ */
+#define pci_remap_cfgspace(addr, size) __ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRnE))
+
 /*
  * io{read,write}{16,32,64}be() macros
  */