According to Microsoft documentation, the signature in the standard hypervisor CPUID leaf at 0x40000000 identifies the Vendor ID and is for reporting and diagnostic purposes only. We can therefore allow the user to change it to whatever they want, within the 12 character limit. Add a new hyperv-vendor-id option to the -cpu flag to allow for this, ex: -cpu host,hv_time,hv_vendor_id=KeenlyKVM Link: http://msdn.microsoft.com/library/windows/hardware/hh975392 Signed-off-by: Alex Williamson <alex.williamson@xxxxxxxxxx> --- target-i386/cpu-qom.h | 1 + target-i386/cpu.c | 1 + target-i386/kvm.c | 8 +++++++- 3 files changed, 9 insertions(+), 1 deletion(-) diff --git a/target-i386/cpu-qom.h b/target-i386/cpu-qom.h index c35b624..6c1eaaa 100644 --- a/target-i386/cpu-qom.h +++ b/target-i386/cpu-qom.h @@ -88,6 +88,7 @@ typedef struct X86CPU { bool hyperv_vapic; bool hyperv_relaxed_timing; int hyperv_spinlock_attempts; + char *hyperv_vendor_id; bool hyperv_time; bool hyperv_crash; bool check_cpuid; diff --git a/target-i386/cpu.c b/target-i386/cpu.c index 05d7f26..f9304ea 100644 --- a/target-i386/cpu.c +++ b/target-i386/cpu.c @@ -3146,6 +3146,7 @@ static Property x86_cpu_properties[] = { DEFINE_PROP_UINT32("level", X86CPU, env.cpuid_level, 0), DEFINE_PROP_UINT32("xlevel", X86CPU, env.cpuid_xlevel, 0), DEFINE_PROP_UINT32("xlevel2", X86CPU, env.cpuid_xlevel2, 0), + DEFINE_PROP_STRING_LEN("hv-vendor-id", X86CPU, hyperv_vendor_id, 12), DEFINE_PROP_END_OF_LIST() }; diff --git a/target-i386/kvm.c b/target-i386/kvm.c index 80d1a7e..c4108ab 100644 --- a/target-i386/kvm.c +++ b/target-i386/kvm.c @@ -490,7 +490,13 @@ int kvm_arch_init_vcpu(CPUState *cs) if (hyperv_enabled(cpu)) { c = &cpuid_data.entries[cpuid_i++]; c->function = HYPERV_CPUID_VENDOR_AND_MAX_FUNCTIONS; - memcpy(signature, "Microsoft Hv", 12); + if (!cpu->hyperv_vendor_id) { + memcpy(signature, "Microsoft Hv", 12); + } else { + memset(signature, 0, 12); + memcpy(signature, cpu->hyperv_vendor_id, + strlen(cpu->hyperv_vendor_id)); + } c->eax = HYPERV_CPUID_MIN; c->ebx = signature[0]; c->ecx = signature[1]; -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
