tests: Add 'kvm' tag to tests

Some of our tests require KVM. Tagging these tests as such allow us to
filter them in or out during testing.

Change-Id: I3f188d3e268409535043cc32b64d99e4657638cd
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/56829
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

ext/testlib/configuration.py

@@ -254,6 +254,8 @@ def define_constants(constants):
     constants.host_x86_64_tag = 'x86_64'
     constants.host_arm_tag = 'aarch64'
 
+    constants.kvm_tag = 'kvm'
+
     constants.supported_tags = {
         constants.isa_tag_type : (
             constants.x86_tag,

tests/gem5/fs/linux/arm/test.py

@@ -135,7 +135,8 @@ for name in arm_fs_quick_tests:
         valid_isas=(constants.arm_tag,),
         length=constants.quick_tag,
         valid_hosts=valid_hosts,
-        fixtures=(arm_fs_binaries,)
+        fixtures=(arm_fs_binaries,),
+        uses_kvm= name in arm_fs_kvm_tests,
     )
 
 for name in arm_fs_long_tests:
@@ -151,5 +152,6 @@ for name in arm_fs_long_tests:
         config_args=args,
         valid_isas=(constants.arm_tag,),
         length=constants.long_tag,
-        fixtures=(arm_fs_binaries,)
+        fixtures=(arm_fs_binaries,),
+        uses_kvm= name in arm_fs_kvm_tests,
     )

tests/gem5/gem5_library_example_tests/test_gem5_library_examples.py

@@ -70,6 +70,7 @@ if os.access("/dev/kvm", mode=os.R_OK | os.W_OK):
         valid_isas=(constants.x86_tag,),
         valid_hosts=constants.supported_hosts,
         length=constants.long_tag,
+        uses_kvm=True,
     )
 
 gem5_verify_config(
@@ -108,6 +109,7 @@ if os.access("/dev/kvm", mode=os.R_OK | os.W_OK):
         protocol="MESI_Two_Level",
         valid_hosts=constants.supported_hosts,
         length=constants.long_tag,
+        uses_kvm=True,
     )
 
 if os.access("/dev/kvm", mode=os.R_OK | os.W_OK):
@@ -135,6 +137,7 @@ if os.access("/dev/kvm", mode=os.R_OK | os.W_OK):
         protocol="MESI_Two_Level",
         valid_hosts=constants.supported_hosts,
         length=constants.long_tag,
+        uses_kvm=True,
     )
 
 if os.access("/dev/kvm", mode=os.R_OK | os.W_OK):
@@ -156,6 +159,7 @@ if os.access("/dev/kvm", mode=os.R_OK | os.W_OK):
         protocol="MESI_Two_Level",
         valid_hosts=constants.supported_hosts,
         length=constants.long_tag,
+        uses_kvm=True,
     )
 
 gem5_verify_config(

tests/gem5/kvm-fork-tests/test_kvm_fork_run.py

@@ -89,6 +89,7 @@ def test_kvm_fork_run(cpu: str, num_cpus: int, mem_system: str, length: str):
         valid_hosts=constants.supported_hosts,
         protocol=protocol_to_use,
         length=length,
+        uses_kvm=True,
     )
 
 

tests/gem5/kvm-switch-tests/test_kvm_cpu_switch.py

@@ -87,6 +87,7 @@ def test_kvm_switch(cpu: str, num_cpus: int, mem_system: str, length: str):
         valid_hosts=constants.supported_hosts,
         protocol=protocol_to_use,
         length=length,
+        uses_kvm=True,
     )
 
 

tests/gem5/parsec-benchmarks/test_parsec.py

@@ -88,6 +88,7 @@ def test_parsec(
         valid_isas=(constants.x86_tag,),
         valid_hosts=constants.supported_hosts,
         length=length,
+        uses_kvm=True,
     )
 
 

tests/gem5/suite.py

@@ -59,7 +59,9 @@ def gem5_verify_config(name,
                        valid_variants=constants.supported_variants,
                        length=constants.supported_lengths[0],
                        valid_hosts=constants.supported_hosts,
-                       protocol=None):
+                       protocol=None,
+                       uses_kvm=False,
+                    ):
     '''
     Helper class to generate common gem5 tests using verifiers.
 
@@ -84,6 +86,9 @@ def gem5_verify_config(name,
 
     :param valid_variants: An iterable with the variant levels that
         this test can be ran for. (E.g. opt, debug)
+
+    :param uses_kvm: States if this verifier uses KVM. If so, the "kvm" tag
+        will be included.
     '''
     fixtures = list(fixtures)
     testsuites = []
@@ -123,6 +128,9 @@ def gem5_verify_config(name,
                 # Add the isa and variant to tags list.
                 tags = [isa, opt, length, host]
 
+                if uses_kvm:
+                    tags.append(constants.kvm_tag)
+
                 # Create the gem5 target for the specific architecture and
                 # variant.
                 _fixtures = copy.copy(fixtures)