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Re: virtio-pci reset option
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From: |
Michael S. Tsirkin |
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Subject: |
Re: virtio-pci reset option |
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Date: |
Thu, 1 Apr 2021 09:53:14 -0400 |
On Thu, Apr 01, 2021 at 05:09:23PM +0530, Ani Sinha wrote:
> Hi MST:
>
> ref: https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-bus-pci
>
> What: /sys/bus/pci/devices/.../reset
> Date: July 2009
> Contact: Michael S. Tsirkin <mst@redhat.com>
> Description:
> Some devices allow an individual function to be reset
> without affecting other functions in the same device.
> For devices that have this support, a file named reset
> will be present in sysfs. Writing 1 to this file
> will perform reset.
>
>
> Can you please tell me which change in the kernel virtio-pci driver
> enabled this option to be available in sysfs? The kernel we are
> running does not seem to have this option for virtio-pci devices. I
> cannot seem to pin-point the exact change that is needed to get this.
>
>
> thanks
>
> ani
Likely this one:
commit eb1556c493d8abc5bfc8685561bcea934700e200
Author: Julia Suvorova <jusual@redhat.com>
Date: Tue Aug 20 18:30:05 2019 +0200
virtio-pci: Add Function Level Reset support
--
MST