linux-kernel - Re: [PATCH v4 06/17] PCI: add SIOV and IMS capability detection

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Message-ID: <CAPcyv4hEYLVn_RmYjvfCaEtnvqrBAd0V9KgHmjQuBLy4GEw+_A@mail.gmail.com>
Date:   Fri, 6 Nov 2020 17:42:29 -0800
From:   Dan Williams <dan.j.williams@...el.com>
To:     Jason Gunthorpe <jgg@...dia.com>
Cc:     "Raj, Ashok" <ashok.raj@...el.com>,
        "Tian, Kevin" <kevin.tian@...el.com>,
        "Jiang, Dave" <dave.jiang@...el.com>,
        Bjorn Helgaas <helgaas@...nel.org>,
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        "maz@...nel.org" <maz@...nel.org>,
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        "Pan, Jacob jun" <jacob.jun.pan@...el.com>,
        "Liu, Yi L" <yi.l.liu@...el.com>, "Lu, Baolu" <baolu.lu@...el.com>,
        "Kumar, Sanjay K" <sanjay.k.kumar@...el.com>,
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Subject: Re: [PATCH v4 06/17] PCI: add SIOV and IMS capability detection

On Fri, Nov 6, 2020 at 4:12 PM Jason Gunthorpe <jgg@...dia.com> wrote:
>
> On Fri, Nov 06, 2020 at 03:47:00PM -0800, Dan Williams wrote:
[..]
> The only sane way to implement this generically is for the VMM to
> provide a hypercall to obtain a real *working* addr/data pair(s) and
> then have the platform hand those out from
> pci_subdevice_msi_create_irq_domain().

Yeah, that seems a logical attach point for this magic. Appreciate you
taking the time to lay it out.