Re: Standardizing an MSR or other hypercall to get an RNG seed?

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Subject: Re: Standardizing an MSR or other hypercall to get an RNG seed?
From: "H. Peter Anvin" <hpa@xxxxxxxxx>
Date: Mon, 22 Sep 2014 07:18:20 -0700
Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx>, Nadav Amit <nadav.amit@xxxxxxxxx>, Linux Virtualization <virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx>, kvm list <kvm@xxxxxxxxxxxxxxx>, Gleb Natapov <gleb@xxxxxxxxxx>, Paolo Bonzini <pbonzini@xxxxxxxxxx>, "Theodore Ts'o" <tytso@xxxxxxx>
In-reply-to: <54202F67.2010606@zytor.com>
References: <CALCETrX66iDM+eG56hpMN4TcuXtzbEr5nB_f6JE-2XETSMWV5w@mail.gmail.com> <541C765B.5050705@codeaurora.org> <CALCETrU_r90=ve4v6xKfZHR_2O5+f05URqD5fzkbSpcuV4tb8A@mail.gmail.com> <15C8041A-3488-4693-B329-3A9FE77A0CB9@gmail.com> <CALCETrXq2FJ4c6MeEHCVeY7muV6C1NpuKpmtr+PcnHV2DpF3Zg@mail.gmail.com> <541CA440.8080909@zytor.com> <542024CB.2070704@codeaurora.org> <54202F67.2010606@zytor.com>
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On 09/22/2014 07:17 AM, H. Peter Anvin wrote:
> 
> It could, but how would you enumerate that?  A new "RDRAND-CPL-0" CPUID
> bit pretty much would be required.
> 

Note that there are two things that differ: the CPL 0-ness and the
performance/exhaustibility attributes.

	-hpa


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References:
- Standardizing an MSR or other hypercall to get an RNG seed?
  - From: Andy Lutomirski
- Re: Standardizing an MSR or other hypercall to get an RNG seed?
  - From: Christopher Covington
- Re: Standardizing an MSR or other hypercall to get an RNG seed?
  - From: Andy Lutomirski
- Re: Standardizing an MSR or other hypercall to get an RNG seed?
  - From: Nadav Amit
- Re: Standardizing an MSR or other hypercall to get an RNG seed?
  - From: Andy Lutomirski
- Re: Standardizing an MSR or other hypercall to get an RNG seed?
  - From: H. Peter Anvin
- Re: Standardizing an MSR or other hypercall to get an RNG seed?
  - From: Christopher Covington
- Re: Standardizing an MSR or other hypercall to get an RNG seed?
  - From: H. Peter Anvin

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