diff options
| -rw-r--r-- | target/i386/cpu.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 6b7043e425..48b55ebd0a 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -5950,8 +5950,15 @@ void x86_cpu_expand_features(X86CPU *cpu, Error **errp) } } - /* CPU topology with multi-dies support requires CPUID[0x1F] */ - if (env->nr_dies > 1) { + /* + * Intel CPU topology with multi-dies support requires CPUID[0x1F]. + * For AMD Rome/Milan, cpuid level is 0x10, and guest OS should detect + * extended toplogy by leaf 0xB. Only adjust it for Intel CPU, unless + * cpu->vendor_cpuid_only has been unset for compatibility with older + * machine types. + */ + if ((env->nr_dies > 1) && + (IS_INTEL_CPU(env) || !cpu->vendor_cpuid_only)) { x86_cpu_adjust_level(cpu, &env->cpuid_min_level, 0x1F); } |