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Date: Sun, 17 Aug 2014 10:44:29 +0200
From: Paolo Bonzini <pbonzini@redhat.com>
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To: Andy Lutomirski <luto@amacapital.net>, "Theodore Ts'o" <tytso@mit.edu>,
        "H. Peter Anvin" <hpa@zytor.com>, 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>, Bandan Das <bsd@redhat.com>,
        Andrew Honig <ahonig@google.com>, KY Srinivasan <kys@microsoft.com>
Subject: Re: [PATCH v5 0/5] random,x86,kvm: Rework arch RNG seeds and get
 some from kvm
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Il 13/08/2014 20:33, Andy Lutomirski ha scritto:
> 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.

Migration doesn't need an arch_random_init, only cloning does.

MS has an ACPI-based specification for this they call the "VM Generation
ID", which QEMU should be implementing it sooner rather than later.  In
Linux we could add a generic notifier, and an x86 platform driver that
implements the VM Generation ID specification and invokes the notifier.

http://go.microsoft.com/fwlink/p/?LinkID=260709 (warning, .docx ahead)

KY, would you be interested in looking at this?

Paolo