Messages in this thread | | | Date | Wed, 16 Jul 2014 09:10:27 +0200 | From | Daniel Borkmann <> | Subject | Re: [PATCH 0/4] random,x86,kvm: Add and use MSR_KVM_GET_RNG_SEED |
| |
On 07/16/2014 08:41 AM, Gleb Natapov wrote: > On Tue, Jul 15, 2014 at 07:48:06PM -0700, Andy Lutomirski wrote: >> virtio-rng is both too complicated and insufficient for initial rng >> seeding. It's far too complicated to use for KASLR or any other >> early boot random number needs. It also provides /dev/random-style >> bits, which means that making guest boot wait for virtio-rng is >> unacceptably slow, and doing it asynchronously means that >> /dev/urandom might be predictable when userspace starts. >> >> This introduces a very simple synchronous mechanism to get >> /dev/urandom-style bits. > > Why can't you use RDRAND instruction for that?
You mean using it directly? I think simply for the very same reasons as in c2557a303a ...
| |