On Tue, Oct 09, 2012 at 02:18:05PM -0300, Marcelo Tosatti wrote: > On Mon, Sep 24, 2012 at 10:32:07AM -0400, Don Slutz wrote: > > Also known as Paravirtualization level. > > > > This change is based on: > > > > Microsoft Hypervisor CPUID Leaves: > > http://msdn.microsoft.com/en-us/library/windows/hardware/ff542428%28v=vs.85%29.aspx > > > > Linux kernel change starts with: > > http://fixunix.com/kernel/538707-use-cpuid-communicate-hypervisor.html > > Also: > > http://lkml.indiana.edu/hypermail/linux/kernel/1205.0/00100.html > > > > VMware documention on CPUIDs (Mechanisms to determine if software is > > running in a VMware virtual machine): > > http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 > > > > QEMU knows this is KVM_CPUID_SIGNATURE (0x40000000). > > > > Signed-off-by: Don Slutz <Don@xxxxxxxxxxxxxxx> > > --- > > target-i386/kvm.c | 4 ++-- > > 1 files changed, 2 insertions(+), 2 deletions(-) > > > > diff --git a/target-i386/kvm.c b/target-i386/kvm.c > > index 895d848..8462c75 100644 > > --- a/target-i386/kvm.c > > +++ b/target-i386/kvm.c > > @@ -389,12 +389,12 @@ int kvm_arch_init_vcpu(CPUX86State *env) > > c = &cpuid_data.entries[cpuid_i++]; > > memset(c, 0, sizeof(*c)); > > c->function = KVM_CPUID_SIGNATURE > > - if (!hyperv_enabled()) { > > + if (!env->cpuid_hv_level_set) { > > memcpy(signature, "KVMKVMKVM\0\0\0", 12); > > c->eax = 0; > > } else { > > memcpy(signature, "Microsoft Hv", 12); > > - c->eax = HYPERV_CPUID_MIN; > > + c->eax = env->cpuid_hv_level; > > This breaks hyperv_enabled() checks. > > Don, are you certain it is worthwhile to make this configurable? > Can you explain why, under your scenario, it is worthwhile? > > Because these are separate problems: > > - "Fake" VMWare hypervisor (which seems to be your main goal). > - Make CPUID HV leafs configurable via command line. Err, meant via properties. Point is, why have VMWare CPUID configuration as data, if there are reasons to believe code is a better fit (code as in current Hyper-V implementation). > My point is that the CPUIDs must be carefully constructed, > that i miss the point why making them configurable is > desired. > > -- > 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 -- 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
