[riscv] Flush icache in both local and remote harts

luyahan · V8 LUCI CQ · commit 9ab40592f697 · 2024-12-11T07:23:41.000Z
Fix the I-Cache flush flag according to the implementation of flush_icache_mm in Linux kernel. Change-Id: I6e6b1f56c377c2c0a629e170737bfac6c357ce8d Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/6080611 Commit-Queue: Yahan Lu (LuYahan) <yahan@iscas.ac.cn> Reviewed-by: Ji Qiu <qiuji@iscas.ac.cn> Cr-Commit-Position: refs/heads/main@{#97673}
diff --git a/src/codegen/riscv/cpu-riscv.cc b/src/codegen/riscv/cpu-riscv.cc
@@ -15,16 +15,12 @@ namespace internal {
 void CpuFeatures::FlushICache(void* start, size_t size) {
 #if !defined(USE_SIMULATOR)
   char* end = reinterpret_cast<char*>(start) + size;
-  // The definition of this syscall is equal to
-  // SYSCALL_DEFINE3(riscv_flush_icache, uintptr_t, start,
-  //                 uintptr_t, end, uintptr_t, flags)
-  // The flag here is set to be SYS_RISCV_FLUSH_ICACHE_LOCAL, which is
-  // defined as 1 in the Linux kernel.
   // SYS_riscv_flush_icache is a symbolic constant used in user-space code to
   // identify the flush_icache system call, while __NR_riscv_flush_icache is the
   // corresponding system call number used in the kernel to dispatch the system
   // call.
-  syscall(__NR_riscv_flush_icache, start, end, 1);
+  // The flag set to zero will flush all cpu cores.
+  syscall(__NR_riscv_flush_icache, start, end, 0);
 #endif  // !USE_SIMULATOR.
 }
 
