linux-kernel - Re: [patch V2 00/46] x86, PCI, XEN, genirq ...: Prepare for device MSI

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Message-ID: <20200930114301.GD816047@nvidia.com>
Date:   Wed, 30 Sep 2020 08:43:01 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Thomas Gleixner <tglx@...utronix.de>
CC:     "Dey, Megha" <megha.dey@...el.com>,
        LKML <linux-kernel@...r.kernel.org>, <x86@...nel.org>,
        Joerg Roedel <joro@...tes.org>,
        <iommu@...ts.linux-foundation.org>, <linux-hyperv@...r.kernel.org>,
        "Haiyang Zhang" <haiyangz@...rosoft.com>,
        Jon Derrick <jonathan.derrick@...el.com>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Wei Liu <wei.liu@...nel.org>,
        "K. Y. Srinivasan" <kys@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Steve Wahl <steve.wahl@....com>,
        Dimitri Sivanich <sivanich@....com>,
        "Russ Anderson" <rja@....com>, <linux-pci@...r.kernel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        "Konrad Rzeszutek Wilk" <konrad.wilk@...cle.com>,
        <xen-devel@...ts.xenproject.org>, Juergen Gross <jgross@...e.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Marc Zyngier <maz@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        "Dave Jiang" <dave.jiang@...el.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Jacob Pan <jacob.jun.pan@...el.com>,
        Baolu Lu <baolu.lu@...el.com>,
        "Kevin Tian" <kevin.tian@...el.com>,
        Dan Williams <dan.j.williams@...el.com>,
        <ravi.v.shankar@...el.com>
Subject: Re: [patch V2 00/46] x86, PCI, XEN, genirq ...: Prepare for device
 MSI

On Wed, Sep 30, 2020 at 08:41:48AM +0200, Thomas Gleixner wrote:
> On Tue, Sep 29 2020 at 16:03, Megha Dey wrote:
> > On 8/26/2020 4:16 AM, Thomas Gleixner wrote:
> >> #9	is obviously just for the folks interested in IMS
> >>
> >
> > I see that the tip tree (as of 9/29) has most of these patches but 
> > notice that the DEV_MSI related patches
> >
> > haven't made it. I have tested the tip tree(x86/irq branch) with your
> > DEV_MSI infra patches and our IMS patches with the IDXD driver and was
> 
> Your IMS patches? Why do you need something special again?
> 
> > wondering if we should push out those patches as part of our patchset?
> 
> As I don't have any hardware to test that, I was waiting for you and
> Jason to confirm that this actually works for the two different IMS
> implementations.

How urgently do you need this? The code looked good from what I
understood. It will be a while before we have all the parts to send an
actual patch though.

We might be able to put together a mockup just to prove it

Jason