On 14/09/16 12:07, Muted Bytes wrote:
On Thu, Sep 8, 2016 at 5:32 AM, rob e <redger...@yahoo.com.au> wrote:
I have recently changed a Windows VM from passthrough of an AMD gpu to
nVidia gpu.
The VM runs win 8,1, the host is Ubuntu 16.04 (Xenial) with vanilla packages
ie. libvirt 1.3.1, qemu 2.5
This has meant I needed to hide kvm and set the vendor_id. The vm now runs
successfully with an nVidia card and nVidia drivers
I have 2 questions
1) How can I verify that windows still recognises the hyper-v facilities
(hv_time,hv_relaxed,hv_vapic,hv_spinlocks=0x1fff) and is operating
accordingly ?
2) I read that Haswell and newer include an apic facility which works faster
without hv_vapic .... is this "rumour" accurate ? (I have a Haswell
motherboard)
REF:
https://www.reddit.com/r/VFIO/comments/479xnx/guests_with_nvidia_gpus_can_enable_hyperv/
If true should I disable hv_vapic ? Is it safe to assume that x2apic will
remain enabled ?
thanks
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Regarding 2), what CPU and motherboard specifically do you have? I
know many Haswell processors do not actually have APICv support (my i7
definitely does not), and officially only certain Xeon processors (and
possibly high end i7) are mentioned by Intel to support it.
hi MB,
thx for responding.
I have -
cpu - Haswell i5 4670
Motherboard - Asrock Z87-Extreme6
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