There is no driver for it. You should write it by youself. Maybe you can refer
to
http://doc.dpdk.org/guides-1.8/prog_guide/ivshmem_lib.html and dpdk source.
Gool luck!
From: Sean Kuo
Date: 2021-03-02 15:59
To: ChangLimin
CC: Bug 1917394; qemu-devel
Subject: Re: [Bug 1917394] [NEW] command lspci does not show the IVSHMEM device
Hi ChangLimin,
Thanks for your reply. I checked again to find the device... I thought the name
was ivshmem.
I don't find any driver code for IVSHMEM in the linux and qemu repo. Can you
give me some help?
00:10.0 RAM memory: Red Hat, Inc. Inter-VM shared memory (rev 01)
Subsystem: Red Hat, Inc. QEMU Virtual Machine
Flags: fast devsel
Memory at fcc1c000 (32-bit, non-prefetchable) [size=256]
Memory at fdc00000 (64-bit, prefetchable) [size=4M]
Thanks,
Sean
On Tue, Mar 2, 2021 at 3:31 PM ChangLimin <chan...@chinatelecom.cn> wrote:
Can you give the lspci messages? The below is my output. There is a RAM memory
device.
$ lspci
00:00.0 Host bridge: Intel Corporation 440FX - 82441FX PMC [Natoma] (rev 02)
00:01.0 ISA bridge: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II]
00:01.1 IDE interface: Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton II]
00:01.2 USB controller: Intel Corporation 82371SB PIIX3 USB [Natoma/Triton II]
(rev 01)
00:01.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 03)
00:02.0 VGA compatible controller: Device 1234:1111 (rev 02)
00:03.0 PCI bridge: Red Hat, Inc. QEMU PCI-PCI bridge
00:04.0 Ethernet controller: Red Hat, Inc. Virtio network device
00:05.0 SCSI storage controller: Red Hat, Inc. Virtio SCSI
00:06.0 Communication controller: Red Hat, Inc. Virtio console
00:10.0 RAM memory: Red Hat, Inc. Inter-VM shared memory (rev 01)
01:07.0 PCI bridge: Red Hat, Inc. QEMU PCI-PCI bridge
From: sean kuo
Date: 2021-03-02 11:24
To: qemu-devel
Subject: [Bug 1917394] [NEW] command lspci does not show the IVSHMEM device
Public bug reported:
qeum version:
QEMU emulator version 4.2.1
I met a problem when I tried to use IVSHMEM. Command lspci does not show the
IVSHMEM device.
Below is the configuration from my side:
1. guest vm xml configuration.
<shmem name='ivshmem'>
<model type='ivshmem-plain'/>
<size unit='M'>2</size>
<address type='pci' domain='0x0000' bus='0x00' slot='0x10'
function='0x0'/>
</shmem>
2. after the booting up and I found the qemu commandline ideedly have the
device option:
ps aux | grep ivshmem
/usr/bin/qemu-system-x86_64
.......(ignore other options)
-object
memory-backend-file,id=shmmem-shmem0,mem-path=/dev/shm/hostmem,size=4194304,share=yes
-device ivshmem-plain,id=shmem0,memdev=shmmem-shmem0,bus=pcie.0,addr=0x10
3. lspci command not shown the device.
4. lshw command indeedly show the device:
*-memory UNCLAIMED
description: RAM memory
product: Inter-VM shared memory
vendor: Red Hat, Inc.
physical id: 10
bus info: pci@0000:00:10.0
version: 01
width: 64 bits
clock: 33MHz (30.3ns)
configuration: latency=0
resources: memory:fcc1c000-fcc1c0ff memory:fdc00000-fdffffff
My host and vm os is ubuntu 20.04 and version is:
#49~20.04.1-Ubuntu SMP Fri Feb 5 09:57:56 UTC 2021 x86_64 x86_64 x86_64
GNU/Linux
** Affects: qemu
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1917394
Title:
command lspci does not show the IVSHMEM device
Status in QEMU:
New
Bug description:
qeum version:
QEMU emulator version 4.2.1
I met a problem when I tried to use IVSHMEM. Command lspci does not show the
IVSHMEM device.
Below is the configuration from my side:
1. guest vm xml configuration.
<shmem name='ivshmem'>
<model type='ivshmem-plain'/>
<size unit='M'>2</size>
<address type='pci' domain='0x0000' bus='0x00' slot='0x10'
function='0x0'/>
</shmem>
2. after the booting up and I found the qemu commandline ideedly have the
device option:
ps aux | grep ivshmem
/usr/bin/qemu-system-x86_64
.......(ignore other options)
-object
memory-backend-file,id=shmmem-shmem0,mem-path=/dev/shm/hostmem,size=4194304,share=yes
-device ivshmem-plain,id=shmem0,memdev=shmmem-shmem0,bus=pcie.0,addr=0x10
3. lspci command not shown the device.
4. lshw command indeedly show the device:
*-memory UNCLAIMED
description: RAM memory
product: Inter-VM shared memory
vendor: Red Hat, Inc.
physical id: 10
bus info: pci@0000:00:10.0
version: 01
width: 64 bits
clock: 33MHz (30.3ns)
configuration: latency=0
resources: memory:fcc1c000-fcc1c0ff memory:fdc00000-fdffffff
My host and vm os is ubuntu 20.04 and version is:
#49~20.04.1-Ubuntu SMP Fri Feb 5 09:57:56 UTC 2021 x86_64 x86_64 x86_64
GNU/Linux
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1917394/+subscriptions
