linux-kernel - Re: [PATCH RFC v2 02/18] irq/dev-msi: Add support for a new DEV

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Message-ID: <87ft8uxjga.fsf@nanos>
Date:   Mon, 10 Aug 2020 23:46:45 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     "Dey\, Megha" <megha.dey@...el.com>,
        Jason Gunthorpe <jgg@...dia.com>,
        "gregkh\@linuxfoundation.org" <gregkh@...uxfoundation.org>
Cc:     Marc Zyngier <maz@...nel.org>,
        "Jiang\, Dave" <dave.jiang@...el.com>,
        "vkoul\@kernel.org" <vkoul@...nel.org>,
        "bhelgaas\@google.com" <bhelgaas@...gle.com>,
        "rafael\@kernel.org" <rafael@...nel.org>,
        "hpa\@zytor.com" <hpa@...or.com>,
        "alex.williamson\@redhat.com" <alex.williamson@...hat.com>,
        "Pan\, Jacob jun" <jacob.jun.pan@...el.com>,
        "Raj\, Ashok" <ashok.raj@...el.com>,
        "Liu\, Yi L" <yi.l.liu@...el.com>,
        "Lu\, Baolu" <baolu.lu@...el.com>,
        "Tian\, Kevin" <kevin.tian@...el.com>,
        "Kumar\, Sanjay K" <sanjay.k.kumar@...el.com>,
        "Luck\, Tony" <tony.luck@...el.com>,
        "Lin\, Jing" <jing.lin@...el.com>,
        "Williams\, Dan J" <dan.j.williams@...el.com>,
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        "Hansen\, Dave" <dave.hansen@...el.com>,
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        "yan.y.zhao\@linux.intel.com" <yan.y.zhao@...ux.intel.com>,
        "pbonzini\@redhat.com" <pbonzini@...hat.com>,
        "Ortiz\, Samuel" <samuel.ortiz@...el.com>,
        "Hossain\, Mona" <mona.hossain@...el.com>,
        "dmaengine\@vger.kernel.org" <dmaengine@...r.kernel.org>,
        "linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>,
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        "kvm\@vger.kernel.org" <kvm@...r.kernel.org>
Subject: Re: [PATCH RFC v2 02/18] irq/dev-msi: Add support for a new DEV_MSI irq domain

Thomas Gleixner <tglx@...utronix.de> writes:
> The infrastructure itself is not more than a thin wrapper around the
> existing msi domain infrastructure and might even share code with
> platform-msi.

And the annoying fact that you need XEN support which opens another can
of worms...