On 11/02/2020 16:31, Roger Pau Monné wrote:
> On Tue, Feb 11, 2020 at 03:51:54PM +0000, Andrew Cooper wrote:
>> diff --git a/xen/arch/x86/domctl.c b/xen/arch/x86/domctl.c
>> index 4fa9c91140..ce76d6d776 100644
>> --- a/xen/arch/x86/domctl.c
>> +++ b/xen/arch/x86/domctl.c
>> @@ -48,7 +48,7 @@ static int gdbsx_guest_mem_io(domid_t domid, struct
>> xen_domctl_gdbsx_memio *iop)
>> }
>> #endif
>>
>> -static void domain_cpu_policy_changed(struct domain *d)
>> +void domain_cpu_policy_changed(struct domain *d)
>> {
>> const struct cpuid_policy *p = d->arch.cpuid;
>> struct vcpu *v;
>> @@ -106,6 +106,13 @@ static void domain_cpu_policy_changed(struct domain *d)
>> ecx = 0;
>> edx = cpufeat_mask(X86_FEATURE_APIC);
>>
>> + /*
>> + * If the Hypervisor bit is set in the policy, we can also
>> + * forward it into real CPUID.
>> + */
>> + if ( p->basic.hypervisor )
>> + ecx |= cpufeat_mask(X86_FEATURE_HYPERVISOR);
> AFAICT dom0 will also get the hypervisor bit set by default, as that's
> part of both the HVM and the PV max policy?
Correct.
>
> If so:
>
> Reviewed-by: Roger Pau Monné <roger....@citrix.com>
Thanks.
~Andrew
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