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From: Ajay Garg <ajaygargnsit@gmail.com>
To: kvm@vger.kernel.org
Subject: Generically, how to see a host-pci-device on guest?
Date: Tue, 28 Sep 2021 13:03:47 +0530	[thread overview]
Message-ID: <CAHP4M8V=tpLaUYidAJLi8U+p-VvKrK2qR97pebqec29r60jrFg@mail.gmail.com> (raw)

Hi All.

I have the following set up:

* Host : Ubuntu-16, on a amd64 hardware
* Guest : Ubuntu-21, as a VM on QEMU/KVM.


Now, I have a SD-MMC card-reader attached physically on the host,
which is listed as expected if I do lspci on the host :

############################################
ajay@ajay-Latitude-E6320:~/ldd3$ lspci
....
....
0a:00.0 SD Host controller: O2 Micro, Inc. OZ600FJ0/OZ900FJ0/OZ600FJS
SD/MMC Card Reader Controller (rev 05)
....
############################################


However, if I try doing lspci on the guest, this pci-device is not listed.




So, I have the following queries :

* Would it require enabling pci-passthrough (if not already) in the
guest-kernel, on a global basis?
* Does having raw-physical-access on the guest, require support from
the pci-device itself?


My ultimate aim is to get the sd-mmc-driver that I wrote for the
host-machine, to run unmodified on the guest-machine (obviously after
the sd-card-reader is detected on the guest, and the code recompiled
on the guest).


Will be grateful for any pointers.


Thanks and Regards,
Ajay

             reply	other threads:[~2021-09-28  7:34 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-28  7:33 Ajay Garg [this message]
2021-09-28 14:54 ` Generically, how to see a host-pci-device on guest? Ajay Garg
2021-09-30  2:37   ` Ajay Garg

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