From: Cornelia Huck <cohuck@redhat.com>
To: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Frank Yang <lfy@google.com>,
virtio-comment@lists.oasis-open.org,
Stefan Hajnoczi <stefanha@redhat.com>,
Halil Pasic <pasic@linux.ibm.com>
Subject: Re: [virtio-comment] [PATCH 1/3] shared memory: Define shared memory regions
Date: Fri, 15 Feb 2019 13:31:42 +0100 [thread overview]
Message-ID: <20190215133142.2bcbaf58.cohuck@redhat.com> (raw)
In-Reply-To: <20190215111908.GC2630@work-vm>
On Fri, 15 Feb 2019 11:19:09 +0000
"Dr. David Alan Gilbert" <dgilbert@redhat.com> wrote:
> What I'm missing here is why the behaviour of the s390's traditional channel program
> matters to the design of an entirely emulated device.
I mostly wrote this up as an explanation...
>
> As long as the s390 allows:
> a) The host to map a region of HVA into GPA at an arbitrary GPA
> address
> b) Not tell the guest that (a) is RAM
> c) Find a non-RAM GPA for (a)
I think (b) and (c) are what we need to come up with a solution for...
DavidH's idea looks like a good starting point for that.
> d) Allow the guest to set up a page table pointing to (c)
> e) Discover (c) via the scheme you described
>
> Then that's all that's needed - and I'm not seeing what is different on
> s390 about a-d from any other architecture.
>
> Dave
>
>
>
> --
> Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
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next prev parent reply other threads:[~2019-02-15 12:31 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-11 11:41 [virtio-comment] [PATCH 0/3] Large shared memory regions Dr. David Alan Gilbert (git)
2019-01-11 11:41 ` [virtio-comment] [PATCH 1/3] shared memory: Define " Dr. David Alan Gilbert (git)
2019-01-11 12:15 ` Cornelia Huck
2019-01-11 12:26 ` Dr. David Alan Gilbert
2019-01-15 10:10 ` Cornelia Huck
2019-01-15 11:23 ` Dr. David Alan Gilbert
2019-01-16 10:56 ` Cornelia Huck
2019-01-16 20:06 ` Dr. David Alan Gilbert
2019-02-11 21:52 ` Cornelia Huck
2019-02-13 18:37 ` Dr. David Alan Gilbert
2019-02-14 10:58 ` Cornelia Huck
2019-02-14 16:37 ` Dr. David Alan Gilbert
2019-02-14 17:43 ` Frank Yang
2019-02-15 11:07 ` Cornelia Huck
2019-02-15 11:19 ` Dr. David Alan Gilbert
2019-02-15 12:31 ` Cornelia Huck [this message]
2019-02-18 15:28 ` Halil Pasic
2019-02-15 11:26 ` David Hildenbrand
2019-02-15 12:28 ` Cornelia Huck
2019-02-15 12:33 ` David Hildenbrand
2019-02-15 12:37 ` Cornelia Huck
2019-02-15 12:59 ` David Hildenbrand
2019-02-15 13:50 ` Dr. David Alan Gilbert
2019-02-15 13:56 ` David Hildenbrand
2019-02-15 14:02 ` Dr. David Alan Gilbert
2019-02-15 14:13 ` David Hildenbrand
2019-02-15 15:14 ` Dr. David Alan Gilbert
2019-02-15 21:42 ` Halil Pasic
2019-02-15 22:08 ` David Hildenbrand
2019-02-15 12:51 ` Halil Pasic
2019-02-15 13:33 ` Cornelia Huck
2019-01-23 15:12 ` Michael S. Tsirkin
2019-01-11 15:29 ` Halil Pasic
2019-01-11 16:07 ` Dr. David Alan Gilbert
2019-01-11 17:57 ` Halil Pasic
2019-01-15 9:33 ` Cornelia Huck
2019-02-13 2:25 ` [virtio-comment] " Stefan Hajnoczi
2019-02-13 10:44 ` Dr. David Alan Gilbert
2019-02-14 3:43 ` Stefan Hajnoczi
2019-01-11 11:41 ` [virtio-comment] [PATCH 2/3] shared memory: Define PCI capability Dr. David Alan Gilbert (git)
2019-02-13 2:30 ` [virtio-comment] " Stefan Hajnoczi
2019-01-11 11:42 ` [virtio-comment] [PATCH 3/3] shared memory: Define mmio registers Dr. David Alan Gilbert (git)
2019-02-13 2:33 ` [virtio-comment] " Stefan Hajnoczi
2019-02-13 16:52 ` Dr. David Alan Gilbert
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