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Re: PCI pass-through problem for SN570 NVME SSD
- To: "G.R." <firemeteor@xxxxxxxxxxxxxxxxxxxxx>, jandryuk@xxxxxxxxx
- From: Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Date: Mon, 4 Jul 2022 17:57:09 +0200
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- Cc: xen-devel <xen-devel@xxxxxxxxxxxxx>
- Delivery-date: Mon, 04 Jul 2022 15:57:33 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Mon, Jul 04, 2022 at 11:44:14PM +0800, G.R. wrote:
> On Mon, Jul 4, 2022 at 11:33 PM Roger Pau Monné <roger.pau@xxxxxxxxxx> wrote:
> >
> > Right, so hvmloader attempts to place a BAR from 05:00.0 and a BAR
> > from 00:17.0 into the same page, which is not that good behavior. It
> > might be sensible to attempt to share the page if both BARs belong to
> > the same device, but not if they belong to different devices.
> >
> > I think the following patch:
> >
> > https://lore.kernel.org/xen-devel/20200117110811.43321-1-roger.pau@xxxxxxxxxx/
> >
> > Might help with this.
> >
> > Thanks, Roger.
> I suppose this patch has been released in a newer XEN version that I
> can pick up if I decide to upgrade?
> Which version would it be?
>
> On the other hand, according to the other experiment I did, this may
> not be the only issue related to this device.
> Still not sure if the device or the SW stack is faulty this time...
I don't think this patch has been applied to any release, adding Jason
who I think was also interested in the fix and might provide more
info.
Thanks, Roger.
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