diff --git a/rocksdb/0000-toku-time-riscv.patch b/rocksdb/0000-toku-time-riscv.patch
new file mode 100644
index 000000000..76497d031
--- /dev/null
+++ b/rocksdb/0000-toku-time-riscv.patch
@@ -0,0 +1,26 @@
+--- utilities/transactions/lock/range/range_tree/lib/portability/toku_time.h	2021-11-25 22:20:08.918983110 +0800
++++ utilities/transactions/lock/range/range_tree/lib/portability/toku_time.h	2021-11-25 23:57:44.352396324 +0800
+@@ -133,6 +133,23 @@
+   return result;
+ #elif defined(__powerpc__)
+   return __ppc_get_timebase();
++#elif defined(__riscv) && __riscv_xlen == 32
++  uint32_t cycles_lo, cycles_hi0, cycles_hi1;
++  // Implemented in assembly because Clang insisted on branching.
++  asm volatile(
++    "rdcycleh %0\n"
++    "rdcycle %1\n"
++    "rdcycleh %2\n"
++    "sub %0, %0, %2\n"
++    "seqz %0, %0\n"
++    "sub %0, zero, %0\n"
++    "and %1, %1, %0\n"
++    : "=r"(cycles_hi0), "=r"(cycles_lo), "=r"(cycles_hi1));
++  return (static_cast<uint64_t>(cycles_hi1) << 32) | cycles_lo;
++#elif defined(__riscv) && __riscv_xlen == 64
++  uint64_t cycles;
++  asm volatile("rdcycle %0" : "=r"(cycles));
++  return cycles;
+ #else
+ #error No timer implementation for this platform
+ #endif
diff --git a/rocksdb/riscv64.patch b/rocksdb/riscv64.patch
new file mode 100644
index 000000000..364bde941
--- /dev/null
+++ b/rocksdb/riscv64.patch
@@ -0,0 +1,23 @@
+--- PKGBUILD
++++ PKGBUILD
+@@ -10,8 +10,18 @@ url="https://rocksdb.org/"
+ license=(GPL2 Apache)
+ depends=(bzip2 jemalloc lz4 snappy zlib zstd tbb liburing)
+ makedepends=(python)
+-source=(rocksdb-$pkgver.tar.gz::https://github.com/facebook/rocksdb/archive/v$pkgver.tar.gz)
+-sha256sums=('b793066463da71d31a46f31946e4fca435a7c3e73435e2bb1d062d95e0a20116')
++source=(rocksdb-$pkgver.tar.gz::https://github.com/facebook/rocksdb/archive/v$pkgver.tar.gz
++        0000-toku-time-riscv.patch)
++sha256sums=('b793066463da71d31a46f31946e4fca435a7c3e73435e2bb1d062d95e0a20116'
++            '9bd4ddbbcad2da293026be27921057f096370894efbb16314246cbf9d463f4a2')
++
++prepare() {
++  cd rocksdb-$pkgver
++  sed -i "s/-lpthread/-pthread/" build_tools/build_detect_platform examples/Makefile
++
++  # see https://github.com/facebook/rocksdb/pull/9215
++  patch -p0 -i ../0000-toku-time-riscv.patch
++}
+ 
+ build() {
+   cd rocksdb-$pkgver