diff --git a/xen/arch/arm/efi/efi-boot.h b/xen/arch/arm/efi/efi-boot.h
index d2a09ad3a1..ee80560e13 100644
--- a/xen/arch/arm/efi/efi-boot.h
+++ b/xen/arch/arm/efi/efi-boot.h
@@ -934,7 +934,7 @@ static void __init efi_arch_blexit(void)
         efi_bs->FreePool(memmap);
 }
 
-static void __init efi_arch_halt(void)
+static void noreturn __init efi_arch_halt(void)
 {
     stop_cpu();
 }
diff --git a/xen/arch/arm/include/asm/arm64/traps.h b/xen/arch/arm/include/asm/arm64/traps.h
index 3be2fa69ee..b7435c6e73 100644
--- a/xen/arch/arm/include/asm/arm64/traps.h
+++ b/xen/arch/arm/include/asm/arm64/traps.h
@@ -6,7 +6,7 @@ void inject_undef64_exception(struct cpu_user_regs *regs);
 void do_sysreg(struct cpu_user_regs *regs,
                const union hsr hsr);
 
-void do_bad_mode(struct cpu_user_regs *regs, int reason);
+void noreturn do_bad_mode(struct cpu_user_regs *regs, int reason);
 
 #endif /* __ASM_ARM64_TRAPS__ */
 /*
diff --git a/xen/arch/arm/include/asm/processor.h b/xen/arch/arm/include/asm/processor.h
index 9cbc4f9110..92c8bc1a31 100644
--- a/xen/arch/arm/include/asm/processor.h
+++ b/xen/arch/arm/include/asm/processor.h
@@ -571,7 +571,7 @@ extern register_t __cpu_logical_map[];
 #endif
 
 #ifndef __ASSEMBLY__
-void panic_PAR(uint64_t par);
+void noreturn panic_PAR(uint64_t par);
 
 /* Debugging functions are declared with external linkage to aid development. */
 void show_registers(const struct cpu_user_regs *regs);
diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c
index 734e23da44..ed72317af3 100644
--- a/xen/arch/arm/setup.c
+++ b/xen/arch/arm/setup.c
@@ -63,7 +63,7 @@ bool __read_mostly acpi_disabled;
 
 domid_t __read_mostly max_init_domid;
 
-static __used void init_done(void)
+static __used void noreturn init_done(void)
 {
     int rc;