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Add Spike-specific extension option in cva6.py for issue #3249 #3280

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Add Spike-specific extension option in cva6.py for issue #3249 #3280

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6a3c6d2
Add Spike-specific extension option to cva6.py
sjo99-kr Apr 21, 2026
9de7373
Update verif/sim/cva6.py
sjo99-kr Apr 21, 2026
77e6f54
Update verif/sim/cva6.py
sjo99-kr Apr 21, 2026
add1b5e
Update verif/sim/cva6.py
sjo99-kr Apr 21, 2026
59c1e97
Update verif/sim/cva6.py
sjo99-kr Apr 21, 2026
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18 changes: 18 additions & 0 deletions verif/sim/cva6.py
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Original file line number Diff line number Diff line change
Expand Up @@ -128,6 +128,8 @@ def parse_iss_yaml(iss, iss_yaml, isa, target, setting_dir, debug_cmd, priv, spi
Returns:
cmd : ISS run command
"""


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logging.info("Processing ISS setup file: %s" % iss_yaml)
yaml_data = read_yaml(iss_yaml)
# Search for matched ISS
Expand All @@ -150,6 +152,15 @@ def parse_iss_yaml(iss, iss_yaml, isa, target, setting_dir, debug_cmd, priv, spi
if m: cmd = re.sub(r"\<xlen\>", m.group('xlen'), cmd)
if iss == "ovpsim":
cmd = re.sub(r"\<cfg_path\>", setting_dir, cmd)
elif iss == "spike":
spike_isa = isa
if spike_extension_list !=['']:
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for i in spike_extension_list:
if i!= "":
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spike_isa += (f"_{i}")
cmd = re.sub(r"\<variant\>", spike_isa, cmd)
cmd = re.sub(r"\<priv\>", priv, cmd)
cmd = re.sub(r"\<target\>", target, cmd)
elif iss == "whisper":
if m:
# TODO: Support u/s mode
Expand Down Expand Up @@ -793,6 +804,10 @@ def parse_args(cwd):
help="Choose additional z, s, x extensions")
parser.add_argument("--spike_params", type=str, default="",
help="Spike command line parameters, run spike --help and spike --print-params to see more")
parser.add_argument("--spike_extension", type=str, default="",
help="Additional ISA extensions enabled only for Spike simulation. "
"Use this for extensions not yet supported by the GCC toolchain (e.g., svadu).")

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rsg = parser.add_argument_group('Random seeds',
'To control random seeds, use at most one '
'of the --start_seed, --seed or --seed_yaml '
Expand Down Expand Up @@ -967,6 +982,9 @@ def load_config(args, cwd):
isa_extension_list.append("zicsr")
isa_extension_list.append("zifencei")

global spike_extension_list
spike_extension_list = args.spike_extension.split(",")

args.spike_params = get_full_spike_param_args(args.spike_params) if args.spike_params else ""


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