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 <[email protected]> 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 <[email protected]> > *Date:* 2021-03-02 11:24 > *To:* qemu-devel <[email protected]> > *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 > > >
