Displaying 20 results from an estimated 23 matches for "kvm_featur".
Did you mean:
kvm_feature
2014 Sep 19
4
Standardizing an MSR or other hypercall to get an RNG seed?
...19/2014 09:37 AM, Gleb 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?
...19/2014 09:37 AM, Gleb 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?
...t 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)
&g...
2014 Sep 19
3
Standardizing an MSR or other hypercall to get an RNG seed?
...t 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)
&g...
2017 Feb 17
1
Re: Why Guest does not retain Host CPU flags
ok thanks , but then can we know which all list of feature are supported by
QEMU/KVM release.
http://www.linux-kvm.org/page/KVM_Features
Does not seem to be all corect .
On Thu, Feb 16, 2017 at 3:42 PM, Jiri Denemark <jdenemar@redhat.com> wrote:
> On Mon, Feb 06, 2017 at 09:51:06 +0530, akhilesh rawat wrote:
> > hi ,
> >
> > I am creating Guest by Libvirt tool " virt-install" with cpu mode...
2014 Sep 19
2
Standardizing an MSR or other hypercall to get an RNG seed?
...t;>>> 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) &a...
2014 Sep 19
2
Standardizing an MSR or other hypercall to get an RNG seed?
...t;>>> 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) &a...
2014 Sep 19
3
Standardizing an MSR or other hypercall to get an RNG seed?
...'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) {
> &...
2014 Sep 19
3
Standardizing an MSR or other hypercall to get an RNG seed?
...'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) {
> &...
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)
> }
>
If we need to do chas...
2014 Sep 19
0
Standardizing an MSR or other hypercall to get an RNG seed?
...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)
>>>...
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'...
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?
...ere 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...
2014 Sep 19
0
Standardizing an MSR or other hypercall to get an RNG seed?
...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 ==...
2017 Feb 06
2
Why Guest does not retain Host CPU flags
hi ,
I am creating Guest by Libvirt tool " virt-install" with cpu model as
host.
After Guest creation i see Guest Missing quite no of flags which Host was
having .
What could be the reason for this ? I am expecting all flags of Host to e
present in Guest as well when choosing cpu model as host .
Guest :
processor : 19
vendor_id : GenuineIntel
cpu family : 6
model
2008 Mar 20
2
[RFC/PATCH 15/15] guest: virtio device support, and kvm hypercalls
...his device (incl. desc)
+ */
+static unsigned desc_size(const struct kvm_device_desc *desc)
+{
+ return sizeof(*desc)
+ + desc->num_vq * sizeof(struct kvm_vqconfig)
+ + desc->feature_len * 2
+ + desc->config_len;
+}
+
+/*
+ * This tests (and acknowleges) a feature bit.
+ */
+static bool kvm_feature(struct virtio_device *vdev, unsigned fbit)
+{
+ struct kvm_device_desc *desc = to_kvmdev(vdev)->desc;
+ u8 *features;
+
+ if (fbit / 8 > desc->feature_len)
+ return false;
+
+ features = kvm_vq_features(desc);
+ if (!(features[fbit / 8] & (1 << (fbit % 8))))
+ return false;
+...
2008 Mar 20
2
[RFC/PATCH 15/15] guest: virtio device support, and kvm hypercalls
...his device (incl. desc)
+ */
+static unsigned desc_size(const struct kvm_device_desc *desc)
+{
+ return sizeof(*desc)
+ + desc->num_vq * sizeof(struct kvm_vqconfig)
+ + desc->feature_len * 2
+ + desc->config_len;
+}
+
+/*
+ * This tests (and acknowleges) a feature bit.
+ */
+static bool kvm_feature(struct virtio_device *vdev, unsigned fbit)
+{
+ struct kvm_device_desc *desc = to_kvmdev(vdev)->desc;
+ u8 *features;
+
+ if (fbit / 8 > desc->feature_len)
+ return false;
+
+ features = kvm_vq_features(desc);
+ if (!(features[fbit / 8] & (1 << (fbit % 8))))
+ return false;
+...
2011 Nov 30
6
[PATCH RFC V3 0/4] kvm : Paravirt-spinlock support for KVM guests
The 4-patch series to follow this email extends KVM-hypervisor and Linux guest
running on KVM-hypervisor to support pv-ticket spinlocks, based on Xen's implementation.
One hypercall is introduced in KVM hypervisor,that allows a vcpu to kick
another vcpu out of halt state.
The blocking of vcpu is done using halt() in (lock_spinning) slowpath.
The V2 change discussion was in: