On 19.08.19 14:32, [email protected] wrote:
Hello,
I wanted to ask if it is possible to establish an Ethernet connection between 2
cells.
On my board there are no Ethernet ports I could use, so I have to simulate this
connection somehow.
Here I came across the topic "shared memory region".
I was able to build the region and /lscpi -v/ (inmate cell) gives me :
/03:00.0 Unassigned class [ff01]: Red Hat, Inc Inter-VM shared memory
Subsystem: Red Hat, Inc Inter-VM shared memory
Flags: fast devsel
Memory at 100000000 (64-bit, non-prefetchable) [size=128K]
Memory at 10000000 (32-bit, non-prefetchable) [size=16K]
/
/
/
/
/
I used : .shmem_protocol = JAILHOUSE_SHMEM_PROTO_VETH,
Now unfortunately I lack the idea what I should do now.
On the topic Userspace I/0 I have looked at the examples of Henning Schild.
Am I right here ?
There is the shared memory device between (currently) 2 cells that is derived
from ivshmem. This device can be defined to serve custom purposes, and then you
may want to use that UIO driver. Or it can be defined to serve as peer-to-peer
virtual network link. Then the ivshmem-net driver from the Jailhouse kernel tree
will bind itself to these interfaces, and you only need to apply normal network
configuration in order to get a link.
You can play with working setups when using jailhouse-images, including the
virtual QEMU targets.
Jan
--
Siemens AG, Corporate Technology, CT RDA IOT SES-DE
Corporate Competence Center Embedded Linux
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