@@ -1414,6 +1414,12 @@ 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;
@@ -5140,8 +5140,11 @@ 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;
}
@@ -5866,6 +5869,7 @@ 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),
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> --- target/i386/cpu.h | 6 ++++++ target/i386/cpu.c | 8 ++++++-- 2 files changed, 12 insertions(+), 2 deletions(-)