Messages in this thread | | | Date | Fri, 29 Aug 2014 08:36:47 +0200 | From | Paolo Bonzini <> | Subject | Re: GET_RNG_SEED hypercall ABI? (Re: [PATCH v5 0/5] random,x86,kvm: Rework arch RNG seeds and get some from kvm) |
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Il 29/08/2014 02:13, Andy Lutomirski ha scritto: > Hmm. Then, assuming that someone manages to allocate a > cross-hypervisor MSR number for this, what am I supposed to do in the > KVM code? Just make it available unconditionally? I don't see why > that wouldn't work reliably, but it seems like an odd design.
The odd part of it is what Gleb mentioned.
> Also, the one and only native feature flag I tested (rdtscp) actually > does work: RDTSCP seems to send #UD if QEMU is passed -cpu > host,-rdtscp.
True, and I'm not sure why. There are a couple others. I was thinking more of things like SSE, AVX or DE (that affects the availability of a bit in CR4).
Paolo
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