From: Avi Kivity <avi@redhat.com>
To: Alexander Graf <agraf@suse.de>
Cc: Carsten Otte <cotte@de.ibm.com>, KVM list <kvm@vger.kernel.org>,
Christian Borntraeger <CBORNTRA@de.ibm.com>,
Martin Schwidefsky <martin.schwidefsky@de.ibm.com>,
Jens Freimann <JFREI@de.ibm.com>
Subject: Re: [PATCH] kvm-s390: userspace access to guest storage keys
Date: Mon, 09 May 2011 14:20:35 +0300 [thread overview]
Message-ID: <4DC7CE03.1070008@redhat.com> (raw)
In-Reply-To: <F6784922-172B-4C6A-9CE3-324B80DF987F@suse.de>
On 05/09/2011 01:11 PM, Alexander Graf wrote:
> >
> > And not in main memory, either?
>
> Nope - storage keys are only accessible using special instructions. They're not in RAM (visible to a guest) :).
>
Interesting, so where are they kept? An on-chip memory? That would
limit the amount of main memory to that indexed by the chip. Extra
off-chip memory?
Asking purely out of interest, this has no bearing on the patch.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
next prev parent reply other threads:[~2011-05-09 11:20 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-06 10:25 [PATCH] kvm-s390: userspace access to guest storage keys Carsten Otte
2011-05-09 8:43 ` Avi Kivity
2011-05-09 10:11 ` Alexander Graf
2011-05-09 11:20 ` Avi Kivity [this message]
2011-05-09 11:32 ` Alexander Graf
2011-05-10 11:29 ` Christian Borntraeger
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