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Date: Wed, 26 Aug 2020 00:03:29 +0200 From: Thomas Gleixner <tglx@...utronix.de> To: Bjorn Helgaas <helgaas@...nel.org> Cc: LKML <linux-kernel@...r.kernel.org>, x86@...nel.org, Bjorn Helgaas <bhelgaas@...gle.com>, linux-pci@...r.kernel.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>, 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> Subject: Re: [patch RFC 30/38] PCI/MSI: Allow to disable arch fallbacks On Tue, Aug 25 2020 at 23:40, Thomas Gleixner wrote: > On Tue, Aug 25 2020 at 16:35, Bjorn Helgaas wrote: >> On Tue, Aug 25, 2020 at 11:28:30PM +0200, Thomas Gleixner wrote: >>> >>> Or did you just mean that those architectures should select >>> CONFIG_I_WANT_THE CRUFT instead of opting out on the fully irq domain >>> based ones? >> >> Yes, that was my real question -- can we confine the cruft in the >> crufty arches? If not, no big deal. > > Should be doable. Let me try. Bah. There is more cruft. The weak implementation has another way to go sideways via msi_controller::setup_irq[s] and msi_controller::teardown_irq drivers/pci/controller/pci-tegra.c drivers/pci/controller/pcie-rcar-host.c drivers/pci/controller/pcie-xilinx.c Groan....
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