diff options
| -rw-r--r-- | target/i386/cpu.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/target/i386/cpu.c b/target/i386/cpu.c index bca776e1fe..7f90823676 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -6412,6 +6412,10 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count, break; } + /* + * If these are changed, they should stay in sync with + * x86_cpu_filter_features(). + */ if (count == 0) { *eax = INTEL_PT_MAX_SUBLEAF; *ebx = INTEL_PT_MINIMAL_EBX; @@ -7156,7 +7160,12 @@ static void x86_cpu_filter_features(X86CPU *cpu, bool verbose) mark_unavailable_features(cpu, w, unavailable_features, prefix); } - if (env->features[FEAT_7_0_EBX] & CPUID_7_0_EBX_INTEL_PT) { + /* + * Check that KVM actually allows the processor tracing features that + * are advertised by cpu_x86_cpuid(). Keep these two in sync. + */ + if ((env->features[FEAT_7_0_EBX] & CPUID_7_0_EBX_INTEL_PT) && + kvm_enabled()) { uint32_t eax_0, ebx_0, ecx_0, edx_0_unused; uint32_t eax_1, ebx_1, ecx_1_unused, edx_1_unused; |