From mboxrd@z Thu Jan  1 00:00:00 1970
From: "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [PATCH v5 0/5] random,x86,kvm: Rework arch RNG seeds and get
 some from kvm
Date: Wed, 13 Aug 2014 11:44:36 -0700
Message-ID: <53EBB214.4030102@zytor.com>
References: <cover.1406177531.git.luto@amacapital.net> <CALCETrXtLf3ZFtyrbwj29C=t3PcTxRT2AJWZCUHdKC3AYyUVAA@mail.gmail.com> <20140812191723.GI12871@thunk.org> <CALCETrVmviT=upxHfPfmLy2aUOKdCuCbNg9WZQcx6f=8T8vv=g@mail.gmail.com> <53EB1859.6030800@zytor.com> <20140813143209.GD6437@thunk.org> <CALCETrUQ8yRmmN1kbdCy99ae2+-Xp4caOBgrXvaQhCCUi=i0zg@mail.gmail.com> <53EBA435.3020207@zytor.com> <20140813182219.GE6437@thunk.org> <CALCETrVTsyq4u+G2Td7Gmi6pa6c1ePgavqN31mjo9_E5=7bGCg@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
To: Andy Lutomirski <luto@amacapital.net>,
	"Theodore Ts'o" <tytso@mit.edu>, kvm list <kvm@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Kees Cook <keescook@chromium.org>, X86 ML <x86@kernel.org>,
	Daniel Borkmann <dborkman@redhat.com>,
	Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>,
	Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>,
	Gleb Natapov <gleb@kernel.org>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Bandan Das <bsd@redhat.com>, Andrew Honig <ahonig@google.com>
Return-path: <linux-kernel-owner@vger.kernel.org>
In-Reply-To: <CALCETrVTsyq4u+G2Td7Gmi6pa6c1ePgavqN31mjo9_E5=7bGCg@mail.gmail.com>
Sender: linux-kernel-owner@vger.kernel.org
List-Id: kvm.vger.kernel.org

On 08/13/2014 11:33 AM, Andy Lutomirski wrote:
> 
> As for doing arch_random_init after clone/migration, I think we'll
> need another KVM extension for that, since, AFAIK, we don't actually
> get notified that we were cloned or migrated.  That will be
> nontrivial.  Maybe we can figure that out at KS, too.
> 

We don't need a reset when migrated (although it might be a good idea
under some circumstances, i.e. if the pools might somehow have gotten
exposed) but definitely when cloned.

	-hpa