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Re: [Xen-devel] [PATCH V3 2/2] Xen/PCIback: Implement PCI flr/slot/bus reset with 'reset' SysFS attribute
- To: Pasi Kärkkäinen <pasik@xxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
- From: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
- Date: Mon, 8 Oct 2018 10:32:45 -0400
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- Cc: Juergen Gross <jgross@xxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, "linux-pci@xxxxxxxxxxxxxxx" <linux-pci@xxxxxxxxxxxxxxx>, George Dunlap <George.Dunlap@xxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxx>, "bhelgaas@xxxxxxxxxx" <bhelgaas@xxxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Mon, 08 Oct 2018 14:33:26 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 10/3/18 11:51 AM, Pasi Kärkkäinen wrote:
> On Wed, Sep 19, 2018 at 11:05:26AM +0200, Roger Pau Monné wrote:
>> On Tue, Sep 18, 2018 at 02:09:53PM -0400, Boris Ostrovsky wrote:
>>> On 9/18/18 5:32 AM, George Dunlap wrote:
>>>>> On Sep 18, 2018, at 8:15 AM, Pasi Kärkkäinen <pasik@xxxxxx> wrote:
>>>>>
>>>>> Hi,
>>>>>
>>>>> On Mon, Sep 17, 2018 at 02:06:02PM -0400, Boris Ostrovsky wrote:
>>>>>> What about the toolstack changes? Have they been accepted? I vaguely
>>>>>> recall there was a discussion about those changes but don't remember how
>>>>>> it ended.
>>>>>>
>>>>> I don't think toolstack/libxl patch has been applied yet either.
>>>>>
>>>>>
>>>>> "[PATCH V1 0/1] Xen/Tools: PCI reset using 'reset' SysFS attribute":
>>>>> https://lists.xen.org/archives/html/xen-devel/2017-12/msg00664.html
>>>>>
>>>>> "[PATCH V1 1/1] Xen/libxl: Perform PCI reset using 'reset' SysFS
>>>>> attribute":
>>>>> https://lists.xen.org/archives/html/xen-devel/2017-12/msg00663.html
>>>
>>> Will this patch work for *BSD? Roger?
>> At least FreeBSD don't support pci-passthrough, so none of this works
>> ATM. There's no sysfs on BSD, so much of what's in libxl_pci.c will
>> have to be moved to libxl_linux.c when BSD support is added.
>>
> Ok. That sounds like it's OK for the initial pci 'reset' implementation in
> xl/libxl to be linux-only..
>
Are these two patches still needed? ISTR they were written originally
to deal with guest trying to use device that was previously assigned to
another guest. But pcistub_put_pci_dev() calls
__pci_reset_function_locked() which first tries FLR, and it looks like
it was added relatively recently.
-boris
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