From: Halil Pasic <pasic@linux.ibm.com>
To: Tony Krowiak <akrowiak@linux.vnet.ibm.com>, qemu-devel@nongnu.org
Cc: mjrosato@linux.vnet.ibm.com, peter.maydell@linaro.org,
pasic@linux.vnet.ibm.com, alifm@linux.vnet.ibm.com,
eskultet@redhat.com, david@redhat.com, pmorel@linux.vnet.ibm.com,
cohuck@redhat.com, heiko.carstens@de.ibm.com,
alex.williamson@redhat.com, agraf@suse.de,
borntraeger@de.ibm.com, qemu-s390x@nongnu.org,
jjherne@linux.vnet.ibm.com, schwidefsky@de.ibm.com,
pbonzini@redhat.com, bjsdjshi@linux.vnet.ibm.com,
eric.auger@redhat.com, rth@twiddle.net
Subject: Re: [Qemu-devel] [PATCH v5 4/6] s390x/vfio: ap: Introduce VFIO AP device
Date: Fri, 11 May 2018 12:29:58 +0200 [thread overview]
Message-ID: <59037385-06ae-e7e6-97a0-73b8acb4bee1@linux.ibm.com> (raw)
In-Reply-To: <1806faa3-dc46-f638-5c87-8a7415c9025a@linux.vnet.ibm.com>
On 05/10/2018 03:10 PM, Tony Krowiak wrote:
>> If I did not. I think this is a big problem. We need to at least
>> zeroize the queues (e.g. on system reset) to avoid leaking
>> sensitive information. Without this, there is no sane way to use
>> ap-passthrough. Or am I wrong?
>
> I do not have a definitive answer, I will have to look into it.
> I'm thinking that since we are using ap-passthrough, the AP bus
> running on the guest would be responsible for handling reset possibly
> by resetting or zeroizing its queues. I'll get back to you on this.
You are on the wrong track. What I'm talking about is the responsibility
of the hypervisor and not the responsibility of the guest.
Regards,
Halil
next prev parent reply other threads:[~2018-05-11 10:30 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-08 12:24 [Qemu-devel] [PATCH v5 0/6] s390x: vfio-ap: guest dedicated crypto adapters Tony Krowiak
2018-05-08 12:24 ` [Qemu-devel] [PATCH v5 1/6] linux-headers: linux header updates for AP support Tony Krowiak
2018-05-08 12:24 ` [Qemu-devel] [PATCH v5 2/6] s390x/ap: base Adjunct Processor (AP) object Tony Krowiak
2018-05-08 12:25 ` [Qemu-devel] [PATCH v5 3/6] s390x/cpumodel: Set up CPU model for AP device support Tony Krowiak
2018-05-15 12:00 ` Pierre Morel
2018-05-15 15:03 ` Tony Krowiak
2018-05-16 9:05 ` Pierre Morel
2018-05-16 9:23 ` David Hildenbrand
2018-05-16 10:41 ` Tony Krowiak
2018-05-08 12:25 ` [Qemu-devel] [PATCH v5 4/6] s390x/vfio: ap: Introduce VFIO AP device Tony Krowiak
2018-05-09 14:28 ` Halil Pasic
2018-05-10 13:10 ` Tony Krowiak
2018-05-11 9:02 ` Pierre Morel
2018-05-14 19:26 ` Tony Krowiak
2018-05-15 7:55 ` Pierre Morel
2018-05-15 15:09 ` Tony Krowiak
2018-05-16 9:09 ` Pierre Morel
2018-05-16 10:43 ` Tony Krowiak
2018-05-11 10:29 ` Halil Pasic [this message]
2018-05-14 19:18 ` Tony Krowiak
2018-05-08 12:25 ` [Qemu-devel] [PATCH v5 5/6] s390: doc: detailed specifications for AP virtualization Tony Krowiak
2018-05-08 12:25 ` [Qemu-devel] [PATCH v5 6/6] MAINTAINERS: add entries for AP Tony Krowiak
2018-05-08 12:46 ` Cornelia Huck
2018-05-08 12:47 ` Cornelia Huck
2018-05-09 13:29 ` Tony Krowiak
2018-05-08 13:47 ` Halil Pasic
2018-05-09 13:30 ` Tony Krowiak
2018-05-09 3:46 ` Alexey Kardashevskiy
2018-05-09 13:28 ` Tony Krowiak
2018-05-08 12:48 ` [Qemu-devel] [PATCH v5 0/6] s390x: vfio-ap: guest dedicated crypto adapters no-reply
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