diff --git a/Makefile b/Makefile
--- a/Makefile
+++ b/Makefile
@@ -935,6 +935,9 @@ KBUILD_RUSTFLAGS += -Copt-level=2
 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 KBUILD_CFLAGS += -Os
 KBUILD_RUSTFLAGS += -Copt-level=s
+else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
+KBUILD_CFLAGS += -O3
+KBUILD_RUSTFLAGS += -Copt-level=3
 endif
 
 # Always set `debug-assertions` and `overflow-checks` because their default
diff --git a/init/Kconfig b/init/Kconfig
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1622,6 +1622,14 @@ config CC_OPTIMIZE_FOR_SIZE
 	  Choosing this option will pass "-Os" to your compiler resulting
 	  in a smaller kernel.
 
+config CC_OPTIMIZE_FOR_PERFORMANCE_O3
+	bool "Optimize harder for performance (-O3)"
+	help
+	  Build with the "-O3" compiler flag: more inlining, loop
+	  unrolling and vectorization than -O2, at the cost of a larger
+	  kernel image and larger modules. Rust code is built at
+	  opt-level 3.
+
 endchoice
 
 config HAVE_LD_DEAD_CODE_DATA_ELIMINATION