diff options
| author | Eduardo Habkost <ehabkost@redhat.com> | 2019-06-27 21:28:37 -0300 |
|---|---|---|
| committer | Eduardo Habkost <ehabkost@redhat.com> | 2019-07-05 17:08:04 -0300 |
| commit | dac1deae658539e39966e12b12378a28e3dc8441 (patch) | |
| tree | 63a845c4ba362e1af40032a3225e59bc876fe9f6 /target | |
| parent | 7d753f61544c7f0160b0a1602faa6cf1f1ce3083 (diff) | |
| download | qemu-dac1deae658539e39966e12b12378a28e3dc8441.zip | |
i386: Add x-force-features option for testing
Add a new option that can be used to disable feature flag
filtering. This will allow CPU model compatibility test cases to
work without host hardware dependencies.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20190628002844.24894-3-ehabkost@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Diffstat (limited to 'target')
| -rw-r--r-- | target/i386/cpu.c | 8 | ||||
| -rw-r--r-- | target/i386/cpu.h | 6 |
2 files changed, 12 insertions, 2 deletions
diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 62043fee54..8852b57c0b 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -5250,8 +5250,11 @@ static int x86_cpu_filter_features(X86CPU *cpu) uint32_t host_feat = x86_cpu_get_supported_feature_word(w, false); uint32_t requested_features = env->features[w]; - env->features[w] &= host_feat; - cpu->filtered_features[w] = requested_features & ~env->features[w]; + uint32_t available_features = requested_features & host_feat; + if (!cpu->force_features) { + env->features[w] = available_features; + } + cpu->filtered_features[w] = requested_features & ~available_features; if (cpu->filtered_features[w]) { rv = 1; } @@ -5980,6 +5983,7 @@ static Property x86_cpu_properties[] = { DEFINE_PROP_BOOL("check", X86CPU, check_cpuid, true), DEFINE_PROP_BOOL("enforce", X86CPU, enforce_cpuid, false), + DEFINE_PROP_BOOL("x-force-features", X86CPU, force_features, false), DEFINE_PROP_BOOL("kvm", X86CPU, expose_kvm, true), DEFINE_PROP_UINT32("phys-bits", X86CPU, phys_bits, 0), DEFINE_PROP_BOOL("host-phys-bits", X86CPU, host_phys_bits, false), diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 0a96c78669..4727226a6a 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -1417,6 +1417,12 @@ struct X86CPU { bool check_cpuid; bool enforce_cpuid; + /* + * Force features to be enabled even if the host doesn't support them. + * This is dangerous and should be done only for testing CPUID + * compatibility. + */ + bool force_features; bool expose_kvm; bool expose_tcg; bool migratable; |