Displaying 15 results from an estimated 15 matches for "kvm_rnd".
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kvm_amd
2014 Sep 19
4
Standardizing an MSR or other hypercall to get an RNG seed?
...eb Natapov wrote:
> >
> > Linux detects what hypervior it runs on very early
>
> Not anywhere close to early enough. We're talking for uses like kASLR.
>
Still to early to do:
h = cpuid(HYPERVIOR_SIGNATURE)
if (h == KVMKVMKVM) {
if (cpuid(kvm_features) & kvm_rnd)
rdmsr(kvm_rnd)
else (h == HyperV) {
if (cpuid(hv_features) & hv_rnd)
rdmsr(hv_rnd)
else (h == XenXenXen) {
if (cpuid(xen_features) & xen_rnd)
rdmsr(xen_rnd)
}
?
--
Gleb.
2014 Sep 19
4
Standardizing an MSR or other hypercall to get an RNG seed?
...eb Natapov wrote:
> >
> > Linux detects what hypervior it runs on very early
>
> Not anywhere close to early enough. We're talking for uses like kASLR.
>
Still to early to do:
h = cpuid(HYPERVIOR_SIGNATURE)
if (h == KVMKVMKVM) {
if (cpuid(kvm_features) & kvm_rnd)
rdmsr(kvm_rnd)
else (h == HyperV) {
if (cpuid(hv_features) & hv_rnd)
rdmsr(hv_rnd)
else (h == XenXenXen) {
if (cpuid(xen_features) & xen_rnd)
rdmsr(xen_rnd)
}
?
--
Gleb.
2014 Sep 19
3
Standardizing an MSR or other hypercall to get an RNG seed?
...on very early
> >>
> >> Not anywhere close to early enough. We're talking for uses like kASLR.
> >>
> > Still to early to do:
> >
> > h = cpuid(HYPERVIOR_SIGNATURE)
> > if (h == KVMKVMKVM) {
> > if (cpuid(kvm_features) & kvm_rnd)
> > rdmsr(kvm_rnd)
> > else (h == HyperV) {
> > if (cpuid(hv_features) & hv_rnd)
> > rdmsr(hv_rnd)
> > else (h == XenXenXen) {
> > if (cpuid(xen_features) & xen_rnd)
> > rdmsr(xen_rnd)
> > }
>...
2014 Sep 19
3
Standardizing an MSR or other hypercall to get an RNG seed?
...on very early
> >>
> >> Not anywhere close to early enough. We're talking for uses like kASLR.
> >>
> > Still to early to do:
> >
> > h = cpuid(HYPERVIOR_SIGNATURE)
> > if (h == KVMKVMKVM) {
> > if (cpuid(kvm_features) & kvm_rnd)
> > rdmsr(kvm_rnd)
> > else (h == HyperV) {
> > if (cpuid(hv_features) & hv_rnd)
> > rdmsr(hv_rnd)
> > else (h == XenXenXen) {
> > if (cpuid(xen_features) & xen_rnd)
> > rdmsr(xen_rnd)
> > }
>...
2014 Sep 19
2
Standardizing an MSR or other hypercall to get an RNG seed?
...nywhere close to early enough. We're talking for uses like kASLR.
> >>>>
> >>> Still to early to do:
> >>>
> >>> h = cpuid(HYPERVIOR_SIGNATURE)
> >>> if (h == KVMKVMKVM) {
> >>> if (cpuid(kvm_features) & kvm_rnd)
> >>> rdmsr(kvm_rnd)
> >>> else (h == HyperV) {
> >>> if (cpuid(hv_features) & hv_rnd)
> >>> rdmsr(hv_rnd)
> >>> else (h == XenXenXen) {
> >>> if (cpuid(xen_features) & xen_rnd)
>...
2014 Sep 19
2
Standardizing an MSR or other hypercall to get an RNG seed?
...nywhere close to early enough. We're talking for uses like kASLR.
> >>>>
> >>> Still to early to do:
> >>>
> >>> h = cpuid(HYPERVIOR_SIGNATURE)
> >>> if (h == KVMKVMKVM) {
> >>> if (cpuid(kvm_features) & kvm_rnd)
> >>> rdmsr(kvm_rnd)
> >>> else (h == HyperV) {
> >>> if (cpuid(hv_features) & hv_rnd)
> >>> rdmsr(hv_rnd)
> >>> else (h == XenXenXen) {
> >>> if (cpuid(xen_features) & xen_rnd)
>...
2014 Sep 19
3
Standardizing an MSR or other hypercall to get an RNG seed?
...uses like kASLR.
> >> >>>>
> >> >>> Still to early to do:
> >> >>>
> >> >>> h = cpuid(HYPERVIOR_SIGNATURE)
> >> >>> if (h == KVMKVMKVM) {
> >> >>> if (cpuid(kvm_features) & kvm_rnd)
> >> >>> rdmsr(kvm_rnd)
> >> >>> else (h == HyperV) {
> >> >>> if (cpuid(hv_features) & hv_rnd)
> >> >>> rdmsr(hv_rnd)
> >> >>> else (h == XenXenXen) {
> >> >>&...
2014 Sep 19
3
Standardizing an MSR or other hypercall to get an RNG seed?
...uses like kASLR.
> >> >>>>
> >> >>> Still to early to do:
> >> >>>
> >> >>> h = cpuid(HYPERVIOR_SIGNATURE)
> >> >>> if (h == KVMKVMKVM) {
> >> >>> if (cpuid(kvm_features) & kvm_rnd)
> >> >>> rdmsr(kvm_rnd)
> >> >>> else (h == HyperV) {
> >> >>> if (cpuid(hv_features) & hv_rnd)
> >> >>> rdmsr(hv_rnd)
> >> >>> else (h == XenXenXen) {
> >> >>&...
2014 Sep 19
0
Standardizing an MSR or other hypercall to get an RNG seed?
...t; Linux detects what hypervior it runs on very early
>>
>> Not anywhere close to early enough. We're talking for uses like kASLR.
>>
> Still to early to do:
>
> h = cpuid(HYPERVIOR_SIGNATURE)
> if (h == KVMKVMKVM) {
> if (cpuid(kvm_features) & kvm_rnd)
> rdmsr(kvm_rnd)
> else (h == HyperV) {
> if (cpuid(hv_features) & hv_rnd)
> rdmsr(hv_rnd)
> else (h == XenXenXen) {
> if (cpuid(xen_features) & xen_rnd)
> rdmsr(xen_rnd)
> }
>
If we need to do chase loops, especial...
2014 Sep 19
0
Standardizing an MSR or other hypercall to get an RNG seed?
...gt;>
>>>> Not anywhere close to early enough. We're talking for uses like kASLR.
>>>>
>>> Still to early to do:
>>>
>>> h = cpuid(HYPERVIOR_SIGNATURE)
>>> if (h == KVMKVMKVM) {
>>> if (cpuid(kvm_features) & kvm_rnd)
>>> rdmsr(kvm_rnd)
>>> else (h == HyperV) {
>>> if (cpuid(hv_features) & hv_rnd)
>>> rdmsr(hv_rnd)
>>> else (h == XenXenXen) {
>>> if (cpuid(xen_features) & xen_rnd)
>>> rdmsr(xen_rnd...
2014 Sep 19
0
Standardizing an MSR or other hypercall to get an RNG seed?
...Linux detects what hypervior it runs on very early
> >
> > Not anywhere close to early enough. We're talking for uses like kASLR.
> >
> Still to early to do:
>
> h = cpuid(HYPERVIOR_SIGNATURE)
> if (h == KVMKVMKVM) {
> if (cpuid(kvm_features) & kvm_rnd)
> rdmsr(kvm_rnd)
> else (h == HyperV) {
> if (cpuid(hv_features) & hv_rnd)
> rdmsr(hv_rnd)
> else (h == XenXenXen) {
> if (cpuid(xen_features) & xen_rnd)
> rdmsr(xen_rnd)
> }
>
I think that there's a lot of value...
2014 Sep 19
2
Standardizing an MSR or other hypercall to get an RNG seed?
On Thu, Sep 18, 2014 at 03:00:05PM -0700, Andy Lutomirski wrote:
> On Thu, Sep 18, 2014 at 2:46 PM, David Hepkin <davidhep at microsoft.com> wrote:
> > I suggest we come to consensus on a specific CPUID leaf where an OS needs to look to determine if a hypervisor supports this capability. We could define a new CPUID leaf range at a well-defined location, or we could just use one of
2014 Sep 19
2
Standardizing an MSR or other hypercall to get an RNG seed?
On Thu, Sep 18, 2014 at 03:00:05PM -0700, Andy Lutomirski wrote:
> On Thu, Sep 18, 2014 at 2:46 PM, David Hepkin <davidhep at microsoft.com> wrote:
> > I suggest we come to consensus on a specific CPUID leaf where an OS needs to look to determine if a hypervisor supports this capability. We could define a new CPUID leaf range at a well-defined location, or we could just use one of
2014 Sep 19
0
Standardizing an MSR or other hypercall to get an RNG seed?
...nough. We're talking for uses like kASLR.
>> >>>>
>> >>> Still to early to do:
>> >>>
>> >>> h = cpuid(HYPERVIOR_SIGNATURE)
>> >>> if (h == KVMKVMKVM) {
>> >>> if (cpuid(kvm_features) & kvm_rnd)
>> >>> rdmsr(kvm_rnd)
>> >>> else (h == HyperV) {
>> >>> if (cpuid(hv_features) & hv_rnd)
>> >>> rdmsr(hv_rnd)
>> >>> else (h == XenXenXen) {
>> >>> if (cpuid(xen_featur...
2014 Sep 19
0
Standardizing an MSR or other hypercall to get an RNG seed?
...; >> >>>>
>> >> >>> Still to early to do:
>> >> >>>
>> >> >>> h = cpuid(HYPERVIOR_SIGNATURE)
>> >> >>> if (h == KVMKVMKVM) {
>> >> >>> if (cpuid(kvm_features) & kvm_rnd)
>> >> >>> rdmsr(kvm_rnd)
>> >> >>> else (h == HyperV) {
>> >> >>> if (cpuid(hv_features) & hv_rnd)
>> >> >>> rdmsr(hv_rnd)
>> >> >>> else (h == XenXenXen) {
>...