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

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Message-ID: <20200901090603.GA110903@debian-boqun.qqnc3lrjykvubdpftowmye0fmh.lx.internal.cloudapp.net>
Date:   Tue, 1 Sep 2020 17:06:03 +0800
From:   Boqun Feng <boqun.feng@...il.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     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>,
        Megha Dey <megha.dey@...el.com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        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>,
        Michael Kelley <mikelley@...rosoft.com>
Subject: Re: [patch V2 00/46] x86, PCI, XEN, genirq ...: Prepare for device
 MSI

Hi Thomas,

On Wed, Aug 26, 2020 at 01:16:28PM +0200, Thomas Gleixner wrote:
[...]
> 
> The whole lot is also available from git:
> 
>    git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git device-msi
> 
> This has been tested on Intel/AMD/KVM but lacks testing on:
> 
>     - HYPERV (-ENODEV)

FWIW, I did a build and boot test in a hyperv guest with your
development branch, the latest commit is 71cbf478eb6f ("irqchip: Add
IMS (Interrupt Message Storm) driver - NOT FOR MERGING"). And everything
seemed working fine.

If you want me to set/unset a particular CONFIG option or run some
command for testing purposes, please let me know ;-)

Regards,
Bqoun

>     - VMD enabled systems (-ENODEV)
>     - XEN (-ENOCLUE)
>     - IMS (-ENODEV)
> 
>     - Any non-X86 code which might depend on the broken compose MSI message
>       logic. Marc excpects not much fallout, but agrees that we need to fix
>       it anyway.
> 
> #1 - #3 should be applied unconditionally for obvious reasons
> #4 - #6 are wortwhile cleanups which should be done independent of device MSI
> 
> #7 - #8 look promising to cleanup the platform MSI implementation
>      	independent of #8, but I neither had cycles nor the stomach to
>      	tackle that.
> 
> #9	is obviously just for the folks interested in IMS
> 
> Thanks,
> 
> 	tglx