diff --git a/meta/lib/oe/tune.py b/meta/lib/oe/tune.py
index 7fda19430d..fed593e9af 100644
--- a/meta/lib/oe/tune.py
+++ b/meta/lib/oe/tune.py
@@ -4,16 +4,25 @@
 # SPDX-License-Identifier: GPL-2.0-only
 #
 
+# RISC-V profile name -> equivalent ISA string. These are determined from compiler output, like:
+# tgamblin@alchemist ~ $ riscv64-linux-gnu-gcc -march=rva20u64 -mabi=lp64d -Q --help=target | grep rv64
+#   -march=rv64imafdc_ziccamoa_ziccif_zicclsm_ziccrse_zicntr_zicsr_zmmul_za128rs_zaamo_zalrsc_zca_zcd
+RISCV_PROFILES = {
+    'rva20u64': 'rv64imafdc_ziccamoa_ziccif_zicclsm_ziccrse_zicntr_zicsr_zmmul_za128rs_zaamo_zalrsc_zca_zcd',
+}
+
 # riscv_isa_to_tune(isa)
 #
 # Automatically translate a RISC-V ISA string to TUNE_FEATURES
 #
 # Abbreviations, such as rv32g -> rv32imaffd_zicsr_zifencei are supported.
 #
-# Profiles, such as rva22u64, are NOT supported, you must use ISA strings.
+# Profiles are supported for the names listed in RISCV_PROFILES. Otherwise, you
+# must use ISA strings.
 #
 def riscv_isa_to_tune(isa):
     _isa = isa.lower()
+    _isa = RISCV_PROFILES.get(_isa, _isa)
 
     feature = []
     iter = 0