diff --git a/compiler-rt/lib/builtins/clear_cache.c b/compiler-rt/lib/builtins/clear_cache.c
--- a/compiler-rt/lib/builtins/clear_cache.c
+++ b/compiler-rt/lib/builtins/clear_cache.c
@@ -46,6 +46,12 @@
 #include <unistd.h>
 #endif
 
+#if defined(__linux__) && (defined(__riscv) && (__riscv_xlen == 64))
+#include <sys/cachectl.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+#endif
+
 // The compiler generates calls to __clear_cache() when creating
 // trampoline functions on the stack for use with nested functions.
 // It is expected to invalidate the instruction cache for the
@@ -84,6 +90,10 @@
 #else
   compilerrt_abort();
 #endif
+#elif defined(__linux__) && (defined(__riscv) && (__riscv_xlen == 64))
+  // The only available flag is SYS_RISCV_FLUSH_ICACHE_LOCAL
+  // see linux/arch/riscv/include/asm/cacheflush.h
+  __riscv_flush_icache(start, end, 0);
 #elif defined(__linux__) && defined(__mips__)
   const uintptr_t start_int = (uintptr_t)start;
   const uintptr_t end_int = (uintptr_t)end;