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

On 07/27/2017 11:31 AM, Juergen Gross wrote:
> 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>

Isn't this dependent on Xen-side patches? I think we should wait until
those are accepted (if nothing else, the watch name should be agreed upon).


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