Hi all,
I am trying to bring virtual network interface for intercell communication,
normally in other hypervisor I observed one physical NIC used for host-machine
and for guest machine we used virtual NIC by Bridged networking or NAT
service.The jailhouse also used the similar mechanism to communicate between
cells. Can someone provide pointer how virtual ethernet actually works on
jailhouse.
I referred the .inter-cell-communication.txt' to bringup the virtual network
interface.
The following option has experimented to communicate between cells.
Option : PCI NIC config added both root and non-root cell
/* PCI-NIC interface*/
{
.type = JAILHOUSE_PCI_TYPE_DEVICE,
.iommu = 1,
.domain = 0x0,
.bdf = 0x100,
.bar_mask = {
0xfffe0000, 0xfffe0000, 0xffffffe0,
0x00000000, 0x00000000, 0x00000000,
},
.caps_start = 0,
.num_caps = 5,
.num_msi_vectors = 1,
.msi_64bits = 1,
.num_msix_vectors = 0,
.msix_region_size = 0x0,
.msix_address = 0x0,
},
also adding below configuration in both root and non-root cell.
// PCI device
{
.type = JAILHOUSE_PCI_TYPE_IVSHMEM,
.domain = 0x0,
.bdf = 0x0e << 3,
.bar_mask = {
0xffffff00, 0xffffffff, 0x00000000,
0x00000000, 0xffffffe0, 0xffffffff,
},
.num_msix_vectors = 1,
.shmem_region = 3,
.shmem_protocol = JAILHOUSE_SHMEM_PROTO_VETH,
},
/* MemRegion: 404100000 : IVSHMEM :JH-added */
{
.phys_start = 0x404100000,
.virt_start = 0x404100000,
.size = 0x100000,
.flags = JAILHOUSE_MEM_READ | JAILHOUSE_MEM_WRITE |
JAILHOUSE_MEM_ROOTSHARED,
},
After adding above all configuration we were able to see IVSHMEM-VETH interface
on non-root cell.
[root@localhost ~]# cat /proc/iomem
.....
0000000100000000-00000001000000ff : ivshmem-net
0000000100000100-000000010000011f : 0000:00:0e.0
0000000404100000-00000004041fffff : ivshmem-net
.....
[root@localhost ~]# cat /proc/interrupts
CPU0 CPU1
4: 1271 0 IO-APIC-4-fasteoi serial
24: 404 0 PCI-MSI-524288-edge enp1s0f0
25: 0 0 PCI-MSI-229376-edge ivshmem-net[0000:00:0e.0]
.......
[root@localhost ~]# lspci
00:00.0 Host bridge: Intel Corporation Xeon E7 v4/Xeon E5 v4/Xeon E3 v4/Xeon D
DMI2 (rev 01)
00:0e.0 Unassigned class [ff01]: Red Hat, Inc Inter-VM shared memory
01:00.0 Ethernet controller: Intel Corporation 82571EB Gigabit Ethernet
Controller (rev 06)
Observation :
* able to assign ip address to both PCI-NIC and virtual network interface.with
this configuaration able to ping between cell and outside world, but Rx/Tx
packets count not increased in the virtual network interface.
* if we remove the PCI-NIC in the non root cell we able to create virtual
network interface and assiging the IP address but not able to ping between
cells.
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