diff --git a/arch/powerpc/lib/vmx-helper.c b/arch/powerpc/lib/vmx-helper.c
index 554b248002b4..57e897b60db8 100644
--- a/arch/powerpc/lib/vmx-helper.c
+++ b/arch/powerpc/lib/vmx-helper.c
@@ -52,7 +52,14 @@ int exit_vmx_usercopy(void)
 }
 EXPORT_SYMBOL(exit_vmx_usercopy);
 
-int enter_vmx_ops(void)
+/*
+ * Can be called from kexec copy_page() path with MMU off. The kexec
+ * code sets preempt_count to HARDIRQ_OFFSET so we return early here.
+ * Since in_interrupt() is always inline, __no_sanitize_address on this
+ * function is sufficient to avoid KASAN shadow memory accesses in real
+ * mode.
+ */
+int __no_sanitize_address enter_vmx_ops(void)
 {
 	if (in_interrupt())
 		return 0;