Re: [Xen-devel] [PATCH] xen-pciback: Mark a PCIe device to be hidden on AER error

[Juergen Gross <jgross@xxxxxxxx>]

On 27/06/17 19:21, Venu Busireddy wrote:
> This patch set is part of a set of patchs that together allow containment
> of unrecoverable AER errors from PCIe devices assigned to guests in
> passthrough mode. The containment is achieved by killing the guest and
> hiding the device upon receiving the fatal AER error.
> 
> The Xen patch related to this patch is:
> 
> https://lists.xen.org/archives/html/xen-devel/2017-06/msg03269.html
> 
> 
> This patch stores in xenstore the <s:b:d.f> of the passed through device
> that triggered the AER unrecoverable error. This will allow xen (with a
> watcher setup to watch "aerFailedSBDF") to make the device unassignable
> until the next reboot or operator intervention using the xen tool stack.
> 
> Note:
> When unrecoverable AER errors are detected from the PCIe devices
> assigned to guests in passthrough mode, BIOS's bring down the server,
> thus bringing down the entire hypervisor. For this patch set to work,
> the AER error handling needs to be delegated to the host operating system.
> 
> Signed-off-by: Venu Busireddy <venu.busireddy@xxxxxxxxxx>
> Signed-off-by: Elena Ufimtseva <elena.ufimtseva@xxxxxxxxxx>

Reviewed-by: Juergen Gross <jgross@xxxxxxxx>


Thanks,

Juergen

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