From: Chen Fan <chen.fan.fnst@cn.fujitsu.com>
To: Alex Williamson <alex.williamson@redhat.com>
Cc: izumi.taku@jp.fujitsu.com, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [RFC v9 14/18] vfio: improve vfio_pci_hot_reset to support more case
Date: Wed, 17 Jun 2015 14:28:33 +0800 [thread overview]
Message-ID: <55811391.1050908@cn.fujitsu.com> (raw)
In-Reply-To: <1434463719.4927.448.camel@redhat.com>
On 06/16/2015 10:08 PM, Alex Williamson wrote:
> On Tue, 2015-06-16 at 16:10 +0800, Chen Fan wrote:
>> On 06/10/2015 05:24 AM, Alex Williamson wrote:
>>> On Tue, 2015-06-09 at 11:37 +0800, Chen Fan wrote:
>>>> the vfio_pci_hot_reset differentiate the single and multi in-used
>>>> devices for reset. but sometimes we own the group without any devices,
>>>> that also should support hot reset.
>>> Nope, did you try it? It can be done, but the group still needs to be
>>> connected to a container for isolation.
>> I'm sorry for that. because I have no such host in hand. but I think if
>> we can keep connect container for each affected group, we also able
>> to use this method to do host bus reset.
>
> All you need is a dual-port card with isolation, which includes all
> Intel 1G NICs (igb & e1000e) as of the quirks that are currently in
> linux-next to be pushed for v4.2. Intel 10G NICs are already quirked
> upstream. There are certainly ways to fake isolation for testing as
> well. Thanks,
I just have a Intel Corporation 82576 dual-port card, but how can I fake
isolation group for this card in linux-next kernel? can you tell me the
document link?
Thanks,
Chen
>
> Alex
>
>>>> Signed-off-by: Chen Fan <chen.fan.fnst@cn.fujitsu.com>
>>>> ---
>>>> hw/vfio/pci.c | 11 +++++++++++
>>>> 1 file changed, 11 insertions(+)
>>>>
>>>> diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
>>>> index a4e8658..6507f39 100644
>>>> --- a/hw/vfio/pci.c
>>>> +++ b/hw/vfio/pci.c
>>>> @@ -3398,6 +3398,7 @@ static int vfio_pci_hot_reset(VFIOPCIDevice *vdev, bool single)
>>>> PCIHostDeviceAddress host;
>>>> VFIOPCIDevice *tmp;
>>>> VFIODevice *vbasedev_iter;
>>>> + bool found;
>>>>
>>>> host.domain = devices[i].segment;
>>>> host.bus = devices[i].bus;
>>>> @@ -3427,6 +3428,7 @@ static int vfio_pci_hot_reset(VFIOPCIDevice *vdev, bool single)
>>>> goto out;
>>>> }
>>>>
>>>> + found = false;
>>>> /* Prep dependent devices for reset and clear our marker. */
>>>> QLIST_FOREACH(vbasedev_iter, &group->device_list, next) {
>>>> if (vbasedev_iter->type != VFIO_DEVICE_TYPE_PCI) {
>>>> @@ -3438,12 +3440,21 @@ static int vfio_pci_hot_reset(VFIOPCIDevice *vdev, bool single)
>>>> ret = -EINVAL;
>>>> goto out_single;
>>>> }
>>>> + found = true;
>>>> vfio_pci_pre_reset(tmp);
>>>> tmp->vbasedev.needs_reset = false;
>>>> multi = true;
>>>> break;
>>>> }
>>>> }
>>>> +
>>>> + /*
>>>> + * If we own the group but does not own the device, we also
>>>> + * should call hot reset with multi.
>>>> + */
>>>> + if (!single && !found) {
>>>> + multi = true;
>>>> + }
>>>> }
>>>>
>>>> if (!single && !multi) {
>>>
>>>
>>>
>
>
>
> .
>
next prev parent reply other threads:[~2015-06-17 6:30 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-09 3:37 [Qemu-devel] [RFC v9 00/18] vfio-pci: pass the aer error to guest Chen Fan
2015-06-09 3:37 ` [Qemu-devel] [RFC v9 01/18] vfio: extract vfio_get_hot_reset_info as a single function Chen Fan
2015-06-09 3:37 ` [Qemu-devel] [RFC v9 02/18] vfio: squeeze out vfio_pci_do_hot_reset for support bus reset Chen Fan
2015-06-09 3:37 ` [Qemu-devel] [RFC v9 03/18] pcie: modify the capability size assert Chen Fan
2015-06-09 3:37 ` [Qemu-devel] [RFC v9 04/18] vfio: make the 4 bytes aligned for capability size Chen Fan
2015-06-09 3:37 ` [Qemu-devel] [RFC v9 05/18] vfio: add pcie extanded capability support Chen Fan
2015-06-09 21:22 ` Alex Williamson
2015-06-09 3:37 ` [Qemu-devel] [RFC v9 06/18] aer: impove pcie_aer_init to support vfio device Chen Fan
2015-06-09 3:37 ` [Qemu-devel] [RFC v9 07/18] vfio: add aer support for " Chen Fan
2015-06-09 3:37 ` [Qemu-devel] [RFC v9 08/18] vfio: improve vfio_get_group to support adding group without devices Chen Fan
2015-06-09 21:23 ` Alex Williamson
2015-06-09 3:37 ` [Qemu-devel] [RFC v9 09/18] vfio: add ref for group to support own affected groups Chen Fan
2015-06-09 21:23 ` Alex Williamson
2015-06-09 3:37 ` [Qemu-devel] [RFC v9 10/18] get all affected groups for each device support aer Chen Fan
2015-06-09 21:22 ` Alex Williamson
2015-06-09 3:37 ` [Qemu-devel] [RFC v9 11/18] vfio: add check host bus reset is support or not Chen Fan
2015-06-09 21:23 ` Alex Williamson
2015-06-09 3:37 ` [Qemu-devel] [RFC v9 12/18] pci: add bus reset_notifiers callbacks for host bus reset Chen Fan
2015-06-09 3:37 ` [Qemu-devel] [RFC v9 13/18] vfio: add sec_bus_reset notifier to notify physical bus reset is needed Chen Fan
2015-06-09 21:23 ` Alex Williamson
2015-06-09 3:37 ` [Qemu-devel] [RFC v9 14/18] vfio: improve vfio_pci_hot_reset to support more case Chen Fan
2015-06-09 21:24 ` Alex Williamson
2015-06-16 8:10 ` Chen Fan
2015-06-16 14:08 ` Alex Williamson
2015-06-17 6:28 ` Chen Fan [this message]
2015-06-17 15:23 ` Alex Williamson
2015-06-18 10:27 ` Chen Fan
2015-06-09 3:37 ` [Qemu-devel] [RFC v9 15/18] vfio: do hot bus reset when do virtual secondary bus reset Chen Fan
2015-06-09 21:23 ` Alex Williamson
2015-06-09 3:37 ` [Qemu-devel] [RFC v9 16/18] pcie_aer: expose pcie_aer_msg() interface Chen Fan
2015-06-09 3:37 ` [Qemu-devel] [RFC v9 17/18] vfio-pci: pass the aer error to guest Chen Fan
2015-06-09 3:37 ` [Qemu-devel] [RFC v9 18/18] vfio: add 'aer' property to expose aercap Chen Fan
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