search for: 4f000002h

..."KVMKVMKVM" signature first in the list to indicate that it should be used by guests in preference to other supported interfaces. Other hypervisors would likely use a different order. The exact semantics of the ordering of the list is beyond the scope of this specification. CPUID leaf 4F000002H: miscellaneous features -------------------------------------------- CPUID.4F000002H.EAX is nonzero if the CommonHV RNG interface is available. CPUID.4F000002H.EBX, CPUID.4F000002H.ECX, and CPUID.4F000002H.EDX are reserved and must be zero in hypervisors compliant with this version of the CommonHV...

..."KVMKVMKVM" signature first in the list to indicate that it should be used by guests in preference to other supported interfaces. Other hypervisors would likely use a different order. The exact semantics of the ordering of the list is beyond the scope of this specification. CPUID leaf 4F000002H: miscellaneous features -------------------------------------------- CPUID.4F000002H.EAX is nonzero if the CommonHV RNG interface is available. CPUID.4F000002H.EBX, CPUID.4F000002H.ECX, and CPUID.4F000002H.EDX are reserved and must be zero in hypervisors compliant with this version of the CommonHV...

...r, and perhaps "prefered interface index" in another. The signatures can then be obtained from CPUID.4F000001[ECX={1 to N}]. That way, a consumer can be confident that they have found all the signatures, without relying on an unbounded loop and checking for zeroes. > > CPUID leaf 4F000002H: miscellaneous features > -------------------------------------------- > > CPUID.4F000002H.EAX is nonzero if the CommonHV RNG interface is available. > CPUID.4F000002H.EBX, CPUID.4F000002H.ECX, and CPUID.4F000002H.EDX are reserved > and must be zero in hypervisors compliant with this...

...r, and perhaps "prefered interface index" in another. The signatures can then be obtained from CPUID.4F000001[ECX={1 to N}]. That way, a consumer can be confident that they have found all the signatures, without relying on an unbounded loop and checking for zeroes. > > CPUID leaf 4F000002H: miscellaneous features > -------------------------------------------- > > CPUID.4F000002H.EAX is nonzero if the CommonHV RNG interface is available. > CPUID.4F000002H.EBX, CPUID.4F000002H.ECX, and CPUID.4F000002H.EDX are reserved > and must be zero in hypervisors compliant with this...

On 29/10/14 05:19, Andy Lutomirski wrote: > CPUID leaf 4F000002H: miscellaneous features > -------------------------------------------- > [...] > ### CommonHV RNG > > If CPUID.4F000002H.EAX is nonzero, then it contains an MSR index used to > communicate with a hypervisor random number generator. This MSR is > referred to as MSR_COMMONHV_R...

On Thu, Oct 30, 2014 at 5:21 AM, David Vrabel <david.vrabel at citrix.com> wrote: > On 29/10/14 05:19, Andy Lutomirski wrote: >> CPUID leaf 4F000002H: miscellaneous features >> -------------------------------------------- >> > [...] >> ### CommonHV RNG >> >> If CPUID.4F000002H.EAX is nonzero, then it contains an MSR index used to >> communicate with a hypervisor random number generator. This MSR is >&gt...

On Thu, Oct 30, 2014 at 5:21 AM, David Vrabel <david.vrabel at citrix.com> wrote: > On 29/10/14 05:19, Andy Lutomirski wrote: >> CPUID leaf 4F000002H: miscellaneous features >> -------------------------------------------- >> > [...] >> ### CommonHV RNG >> >> If CPUID.4F000002H.EAX is nonzero, then it contains an MSR index used to >> communicate with a hypervisor random number generator. This MSR is >&gt...