diff --git a/libc/kernel/uapi/linux/kcov.h b/libc/kernel/uapi/linux/kcov.h
index 40f9912..cf2660b 100644
--- a/libc/kernel/uapi/linux/kcov.h
+++ b/libc/kernel/uapi/linux/kcov.h
@@ -19,9 +19,18 @@
 #ifndef _LINUX_KCOV_IOCTLS_H
 #define _LINUX_KCOV_IOCTLS_H
 #include <linux/types.h>
+struct kcov_remote_arg {
+  __u32 trace_mode;
+  __u32 area_size;
+  __u32 num_handles;
+  __aligned_u64 common_handle;
+  __aligned_u64 handles[0];
+};
+#define KCOV_REMOTE_MAX_HANDLES 0x100
 #define KCOV_INIT_TRACE _IOR('c', 1, unsigned long)
 #define KCOV_ENABLE _IO('c', 100)
 #define KCOV_DISABLE _IO('c', 101)
+#define KCOV_REMOTE_ENABLE _IOW('c', 102, struct kcov_remote_arg)
 enum {
   KCOV_TRACE_PC = 0,
   KCOV_TRACE_CMP = 1,
@@ -29,4 +38,8 @@
 #define KCOV_CMP_CONST (1 << 0)
 #define KCOV_CMP_SIZE(n) ((n) << 1)
 #define KCOV_CMP_MASK KCOV_CMP_SIZE(3)
+#define KCOV_SUBSYSTEM_COMMON (0x00ull << 56)
+#define KCOV_SUBSYSTEM_USB (0x01ull << 56)
+#define KCOV_SUBSYSTEM_MASK (0xffull << 56)
+#define KCOV_INSTANCE_MASK (0xffffffffull)
 #endif