From: "H. Peter Anvin" <hpa@zytor.com>
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>
Subject: Re: [PATCH v5 0/5] random,x86,kvm: Rework arch RNG seeds and get some from kvm
Date: Wed, 13 Aug 2014 19:41:37 -0700 [thread overview]
Message-ID: <53EC21E1.80502@zytor.com> (raw)
In-Reply-To: <53EBB214.4030102@zytor.com>
On 08/13/2014 11:44 AM, H. Peter Anvin wrote:
> 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.
>
But yes, we need a notification. For obvious reasons there is no
suspend event (one can snapshot a running VM) but we need to be notified
upon wakeup, *or* we need to give KVM a way to update the necessary state.
-hpa
next prev parent reply other threads:[~2014-08-14 2:41 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-24 4:57 [PATCH v5 0/5] random,x86,kvm: Rework arch RNG seeds and get some from kvm Andy Lutomirski
2014-07-24 4:57 ` [PATCH v5 1/5] x86,kvm: Add MSR_KVM_GET_RNG_SEED and a matching feature bit Andy Lutomirski
2014-07-31 11:56 ` Paolo Bonzini
2014-07-24 4:57 ` [PATCH v5 2/5] random: Add and use arch_get_rng_seed Andy Lutomirski
2014-07-29 23:46 ` Andy Lutomirski
2014-08-04 22:25 ` Theodore Ts'o
2014-07-24 4:57 ` [PATCH v5 3/5] x86,random: Add an x86 implementation of arch_get_rng_seed Andy Lutomirski
2014-07-24 4:57 ` [PATCH v5 4/5] x86,random,kvm: Use KVM_GET_RNG_SEED in arch_get_rng_seed Andy Lutomirski
2014-07-31 11:56 ` Paolo Bonzini
2014-07-24 4:57 ` [PATCH v5 5/5] x86,kaslr: Use MSR_KVM_GET_RNG_SEED for KASLR if available Andy Lutomirski
2014-07-31 11:56 ` Paolo Bonzini
2014-08-12 19:11 ` [PATCH v5 0/5] random,x86,kvm: Rework arch RNG seeds and get some from kvm Andy Lutomirski
2014-08-12 19:17 ` Theodore Ts'o
2014-08-12 19:22 ` Andy Lutomirski
2014-08-13 7:48 ` H. Peter Anvin
2014-08-13 8:37 ` Andy Lutomirski
2014-08-13 14:32 ` Theodore Ts'o
2014-08-13 16:13 ` Andy Lutomirski
2014-08-13 17:45 ` H. Peter Anvin
2014-08-13 18:22 ` Theodore Ts'o
2014-08-13 18:33 ` Andy Lutomirski
2014-08-13 18:44 ` H. Peter Anvin
2014-08-14 2:41 ` H. Peter Anvin [this message]
2014-08-14 5:14 ` Andy Lutomirski
2014-08-17 8:44 ` Paolo Bonzini
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