check_microarch: refactor to handle possible future reqs

repos/system_upgrade/common/actors/checkmicroarchitecture/libraries/checkmicroarchitecture.py

@@ -0,0 +1,73 @@
+from collections import namedtuple
+
+from leapp import reporting
+from leapp.libraries.common.config.architecture import ARCH_X86_64, matches_architecture
+from leapp.libraries.common.config.version import get_target_major_version
+from leapp.libraries.stdlib import api
+from leapp.models import CPUInfo
+
+X86_64_BASELINE_FLAGS = ['cmov', 'cx8', 'fpu', 'fxsr', 'mmx', 'syscall', 'sse', 'sse2']
+X86_64_V2_FLAGS = ['cx16', 'lahf_lm', 'popcnt', 'pni', 'sse4_1', 'sse4_2', 'ssse3']
+
+MicroarchInfo = namedtuple('MicroarchInfo', ('required_flags', 'extra_report_fields', 'microarch_ver'))
+
+
+def _inhibit_upgrade(missing_flags, target_rhel, microarch_ver, extra_report_fields=None):
+    title = 'Current x86-64 microarchitecture is unsupported in {0}'.format(target_rhel)
+    summary = ('{0} has a higher CPU requirement than older versions, it now requires a CPU '
+               'compatible with {1} instruction set or higher.\n\n'
+               'Missings flags detected are: {2}\n'.format(target_rhel, microarch_ver, ', '.join(missing_flags)))
+
+    report_fields = [
+        reporting.Title(title),
+        reporting.Summary(summary),
+        reporting.Severity(reporting.Severity.HIGH),
+        reporting.Groups([reporting.Groups.INHIBITOR]),
+        reporting.Groups([reporting.Groups.SANITY]),
+        reporting.Remediation(hint=('If case of using virtualization, virtualization platforms often allow '
+                                    'configuring a minimum denominator CPU model for compatibility when migrating '
+                                    'between different CPU models. Ensure that minimum requirements are not below '
+                                    'that of {0}\n').format(target_rhel)),
+    ]
+
+    if extra_report_fields:
+        report_fields += extra_report_fields
+
+    reporting.create_report(report_fields)
+
+
+def process():
+    """
+    Check whether the processor matches the required microarchitecture.
+    """
+
+    if not matches_architecture(ARCH_X86_64):
+        api.current_logger().info('Architecture not x86-64. Skipping microarchitecture test.')
+        return
+
+    cpuinfo = next(api.consume(CPUInfo))
+
+    rhel9_microarch_article = reporting.ExternalLink(
+        title='Building Red Hat Enterprise Linux 9 for the x86-64-v2 microarchitecture level',
+        url='https://red.ht/rhel-9-intel-microarchitectures'
+    )
+
+    rhel_major_to_microarch_reqs = {
+        '9': MicroarchInfo(microarch_ver='x86-64-v2',
+                           required_flags=(X86_64_BASELINE_FLAGS + X86_64_V2_FLAGS),
+                           extra_report_fields=[rhel9_microarch_article]),
+    }
+
+    microarch_info = rhel_major_to_microarch_reqs.get(get_target_major_version())
+    if not microarch_info:
+        api.current_logger().info('No known microarchitecture requirements are known for target RHEL%s.',
+                                  get_target_major_version())
+        return
+
+    missing_flags = [flag for flag in microarch_info.required_flags if flag not in cpuinfo.flags]
+    api.current_logger().debug('Required flags missing: %s', missing_flags)
+    if missing_flags:
+        _inhibit_upgrade(missing_flags,
+                         'RHEL{0}'.format(get_target_major_version()),
+                         microarch_info.microarch_ver,
+                         extra_report_fields=microarch_info.extra_report_fields)

repos/system_upgrade/el8toel9/actors/checkmicroarchitecture/tests/test_checkmicroarchitecture.py → repos/system_upgrade/common/actors/checkmicroarchitecture/tests/test_checkmicroarchitecture.py

@@ -25,32 +25,39 @@ def test_not_x86_64_passes(monkeypatch, arch):
     assert not reporting.create_report.called
 
 
-def test_valid_microarchitecture(monkeypatch):
+@pytest.mark.parametrize(
+    ('target_ver', 'cpu_flags'),
+    [
+        ('9.0', checkmicroarchitecture.X86_64_BASELINE_FLAGS + checkmicroarchitecture.X86_64_V2_FLAGS)
+    ]
+)
+def test_valid_microarchitecture(monkeypatch, target_ver, cpu_flags):
     """
     Test no report is generated on a valid microarchitecture
     """
 
     monkeypatch.setattr(reporting, "create_report", create_report_mocked())
     monkeypatch.setattr(api, 'current_logger', logger_mocked())
 
-    required_flags = checkmicroarchitecture.X86_64_BASELINE_FLAGS + checkmicroarchitecture.X86_64_V2_FLAGS
-    monkeypatch.setattr(api, 'current_actor', CurrentActorMocked(arch=ARCH_X86_64,
-                                                                 msgs=[CPUInfo(flags=required_flags)]))
+    monkeypatch.setattr(api, 'current_actor', CurrentActorMocked(arch=ARCH_X86_64, dst_ver=target_ver,
+                                                                 msgs=[CPUInfo(flags=cpu_flags)]))
 
     checkmicroarchitecture.process()
 
     assert 'Architecture not x86-64. Skipping microarchitecture test.' not in api.current_logger.infomsg
     assert not reporting.create_report.called
 
 
-def test_invalid_microarchitecture(monkeypatch):
+@pytest.mark.parametrize('target_ver', ['9.0'])
+def test_invalid_microarchitecture(monkeypatch, target_ver):
     """
     Test report is generated on x86-64 architecture with invalid microarchitecture and the upgrade is inhibited
     """
 
     monkeypatch.setattr(reporting, "create_report", create_report_mocked())
     monkeypatch.setattr(api, 'current_logger', logger_mocked())
-    monkeypatch.setattr(api, 'current_actor', CurrentActorMocked(arch=ARCH_X86_64, msgs=[CPUInfo()]))
+    monkeypatch.setattr(api, 'current_actor',
+                        CurrentActorMocked(arch=ARCH_X86_64, msgs=[CPUInfo()], dst_ver=target_ver))
 
     checkmicroarchitecture.process()
 
@@ -60,6 +67,6 @@ def test_invalid_microarchitecture(monkeypatch):
     assert 'Architecture not x86-64. Skipping microarchitecture test.' not in api.current_logger().infomsg
     assert reporting.create_report.called == 1
     assert 'microarchitecture is unsupported' in produced_title
-    assert 'RHEL9 has a higher CPU requirement' in produced_summary
+    assert 'has a higher CPU requirement' in produced_summary
     assert reporting.create_report.report_fields['severity'] == reporting.Severity.HIGH
     assert is_inhibitor(reporting.create_report.report_fields)