From mboxrd@z Thu Jan 1 00:00:00 1970 From: "H. Peter Anvin" Subject: Re: Standardizing an MSR or other hypercall to get an RNG seed? Date: Mon, 22 Sep 2014 07:18:20 -0700 Message-ID: <54202FAC.5040200@zytor.com> References: <541C765B.5050705@codeaurora.org> <15C8041A-3488-4693-B329-3A9FE77A0CB9@gmail.com> <541CA440.8080909@zytor.com> <542024CB.2070704@codeaurora.org> <54202F67.2010606@zytor.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Theodore Ts'o , kvm list , Gleb Natapov , Linux Virtualization , Paolo Bonzini , Andy Lutomirski , Nadav Amit To: Christopher Covington Return-path: In-Reply-To: <54202F67.2010606@zytor.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org List-Id: kvm.vger.kernel.org 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