From: Jason Gunthorpe <jgg@nvidia.com>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: "Gupta, Nipun" <Nipun.Gupta@amd.com>,
Robin Murphy <robin.murphy@arm.com>,
"robh+dt@kernel.org" <robh+dt@kernel.org>,
"krzysztof.kozlowski+dt@linaro.org"
<krzysztof.kozlowski+dt@linaro.org>,
"rafael@kernel.org" <rafael@kernel.org>,
"eric.auger@redhat.com" <eric.auger@redhat.com>,
"alex.williamson@redhat.com" <alex.williamson@redhat.com>,
"cohuck@redhat.com" <cohuck@redhat.com>,
"Gupta, Puneet (DCG-ENG)" <puneet.gupta@amd.com>,
"song.bao.hua@hisilicon.com" <song.bao.hua@hisilicon.com>,
"mchehab+huawei@kernel.org" <mchehab+huawei@kernel.org>,
"maz@kernel.org" <maz@kernel.org>,
"f.fainelli@gmail.com" <f.fainelli@gmail.com>,
"jeffrey.l.hugo@gmail.com" <jeffrey.l.hugo@gmail.com>,
"saravanak@google.com" <saravanak@google.com>,
"Michael.Srba@seznam.cz" <Michael.Srba@seznam.cz>,
"mani@kernel.org" <mani@kernel.org>,
"yishaih@nvidia.com" <yishaih@nvidia.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"okaya@kernel.org" <okaya@kernel.org>,
"Anand, Harpreet" <harpreet.anand@amd.com>,
"Agarwal, Nikhil" <nikhil.agarwal@amd.com>,
"Simek, Michal" <michal.simek@amd.com>,
"git (AMD-Xilinx)" <git@amd.com>
Subject: Re: [RFC PATCH v2 2/6] bus/cdx: add the cdx bus driver
Date: Wed, 24 Aug 2022 20:31:22 -0300 [thread overview]
Message-ID: <20220824233122.GA4068@nvidia.com> (raw)
In-Reply-To: <YwYVhJCSAuYcgj1/@kroah.com>
On Wed, Aug 24, 2022 at 02:11:48PM +0200, Greg KH wrote:
> > We can share the RFC in case you are interested in looking at code flow
> > using the of_dynamic approach.
>
> Please no more abuse of the platform device.
Last time this came up there was some disagreement from the ARM folks,
they were not keen on having xx_drivers added all over the place to
support the same OF/DT devices just discovered in a different way. It is
why ACPI is mapped to platform_device even in some cases.
I think if you push them down this path they will get resistance to
get the needed additional xx_drivers into the needed places.
> If your device can be discovered by scanning a bus, it is not a platform
> device.
A DT fragment loaded during boot binds a driver using a
platform_driver, why should a DT fragment loaded post-boot bind using
an XX_driver and further why should the CDX way of getting the DT
raise to such importantance that it gets its own cdx_driver ?
In the end the driver does not care about how the DT was loaded.
None of these things are on a discoverable bus in any sense like PCI
or otherwise. They are devices described by a DT fragement and they
take all their parameters from that chunk of DT.
How the DT was loaded into the system is not a useful distinction that
raises the level of needing an entire new set of xx_driver structs all
over the tree, IMHO.
Jason
next prev parent reply other threads:[~2022-08-24 23:32 UTC|newest]
Thread overview: 198+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-03 12:26 [RFC PATCH 0/2] add support for CDX bus MSI domain Nipun Gupta
2022-08-03 12:26 ` Nipun Gupta
2022-08-03 12:26 ` [RFC PATCH 1/2] irqchip: cdx-bus: add cdx-MSI domain with gic-its domain as parent Nipun Gupta
2022-08-03 12:26 ` Nipun Gupta
2022-08-03 12:33 ` Greg KH
2022-08-03 12:33 ` Greg KH
2022-08-03 12:37 ` Gupta, Nipun
2022-08-03 12:37 ` Gupta, Nipun
2022-08-04 8:49 ` Marc Zyngier
2022-08-04 8:49 ` Marc Zyngier
2022-08-04 9:18 ` Gupta, Nipun
2022-08-04 9:18 ` Gupta, Nipun
2022-08-04 10:38 ` Marc Zyngier
2022-08-04 12:11 ` Gupta, Nipun
2022-08-04 12:11 ` Gupta, Nipun
2022-08-03 12:26 ` [RFC PATCH 2/2] driver core: add compatible string in sysfs for platform devices Nipun Gupta
2022-08-03 12:26 ` Nipun Gupta
2022-08-03 12:31 ` Greg KH
2022-08-03 12:31 ` Greg KH
2022-08-03 12:46 ` Gupta, Nipun
2022-08-03 12:46 ` Gupta, Nipun
2022-08-03 14:16 ` [RFC PATCH 0/2] add support for CDX bus MSI domain Robin Murphy
2022-08-03 14:16 ` Robin Murphy
2022-08-04 4:23 ` Gupta, Nipun
2022-08-04 4:23 ` Gupta, Nipun
2022-08-17 16:00 ` Jason Gunthorpe
2022-08-17 16:00 ` Jason Gunthorpe
2022-08-17 15:05 ` [RFC PATCH v2 0/6] add support for CDX bus controller Nipun Gupta
2022-08-17 15:05 ` [RFC PATCH v2 1/6] Documentation: DT: Add entry for CDX controller Nipun Gupta
2022-08-18 9:54 ` Krzysztof Kozlowski
2022-08-18 9:59 ` Krzysztof Kozlowski
2022-09-05 14:05 ` Gupta, Nipun
2022-09-06 6:55 ` Krzysztof Kozlowski
2022-09-06 7:03 ` Gupta, Nipun
2022-09-06 7:20 ` Krzysztof Kozlowski
2022-08-17 15:05 ` [RFC PATCH v2 2/6] bus/cdx: add the cdx bus driver Nipun Gupta
2022-08-17 15:32 ` Greg KH
2022-08-17 15:46 ` Marc Zyngier
2022-08-22 13:21 ` Gupta, Nipun
2022-08-22 13:29 ` Greg KH
2022-08-24 8:50 ` Gupta, Nipun
2022-08-24 12:11 ` Greg KH
2022-08-24 23:31 ` Jason Gunthorpe [this message]
2022-08-25 18:38 ` Saravana Kannan
2022-08-25 19:57 ` Robin Murphy
2022-08-26 0:08 ` Jason Gunthorpe
2022-08-29 4:49 ` Gupta, Nipun
2022-08-29 4:49 ` Gupta, Nipun
2022-08-29 15:31 ` Jason Gunthorpe
2022-08-30 7:06 ` Gupta, Nipun
2022-08-30 11:25 ` Robin Murphy
2022-08-30 13:01 ` Jason Gunthorpe
2022-08-30 13:12 ` Gupta, Nipun
2022-08-17 15:05 ` [RFC PATCH v2 3/6] bus/cdx: add cdx-MSI domain with gic-its domain as parent Nipun Gupta
2022-08-17 15:33 ` Greg KH
2022-08-17 15:05 ` [RFC PATCH v2 4/6] bus/cdx: add rescan and reset support Nipun Gupta
2022-08-17 15:05 ` [RFC PATCH v2 5/6] vfio: platform: reset: add reset for cdx devices Nipun Gupta
2022-08-17 15:05 ` [RFC PATCH v2 6/6] driver core: add compatible string in sysfs for platform devices Nipun Gupta
2022-08-17 15:30 ` Greg KH
2022-08-17 16:04 ` Saravana Kannan
2022-09-05 13:54 ` Gupta, Nipun
2022-09-06 13:47 ` [RFC PATCH v3 0/7] add support for CDX bus Nipun Gupta
2022-09-06 13:47 ` Nipun Gupta
2022-09-06 13:47 ` [RFC PATCH v3 1/7] dt-bindings: bus: add CDX bus device tree bindings Nipun Gupta
2022-09-06 13:47 ` Nipun Gupta
2022-09-06 17:46 ` Rob Herring
2022-09-06 17:46 ` Rob Herring
2022-09-07 3:13 ` Gupta, Nipun
2022-09-07 3:13 ` Gupta, Nipun
2022-09-08 10:51 ` Krzysztof Kozlowski
2022-09-08 10:51 ` Krzysztof Kozlowski
2022-09-06 13:47 ` [RFC PATCH v3 2/7] bus/cdx: add the cdx bus driver Nipun Gupta
2022-09-06 13:47 ` Nipun Gupta
2022-09-07 0:32 ` Saravana Kannan
2022-09-07 0:32 ` Saravana Kannan
2022-09-07 3:21 ` Gupta, Nipun
2022-09-07 3:21 ` Gupta, Nipun
2022-09-07 18:06 ` Saravana Kannan
2022-09-07 18:06 ` Saravana Kannan
2022-09-07 12:32 ` Greg KH
2022-09-07 12:32 ` Greg KH
2022-09-08 13:29 ` Gupta, Nipun
2022-09-08 13:29 ` Gupta, Nipun
2022-09-06 13:47 ` [RFC PATCH v3 3/7] iommu/arm-smmu-v3: support ops registration for CDX bus Nipun Gupta
2022-09-06 13:47 ` Nipun Gupta
2022-09-07 0:10 ` Saravana Kannan
2022-09-07 0:10 ` Saravana Kannan
2022-09-07 3:17 ` Gupta, Nipun
2022-09-07 3:17 ` Gupta, Nipun
2022-09-07 8:27 ` Robin Murphy
2022-09-07 8:27 ` Robin Murphy
2022-09-07 18:24 ` Saravana Kannan
2022-09-07 18:24 ` Saravana Kannan
2022-09-07 20:40 ` Robin Murphy
2022-09-07 20:40 ` Robin Murphy
2022-09-08 0:14 ` Saravana Kannan
2022-09-08 0:14 ` Saravana Kannan
2022-09-06 13:47 ` [RFC PATCH v3 4/7] bus/cdx: add cdx-MSI domain with gic-its domain as parent Nipun Gupta
2022-09-06 13:47 ` Nipun Gupta
2022-09-06 17:19 ` Jason Gunthorpe
2022-09-06 17:19 ` Jason Gunthorpe
2022-09-07 11:17 ` Marc Zyngier
2022-09-07 11:17 ` Marc Zyngier
2022-09-07 11:33 ` Robin Murphy
2022-09-07 11:33 ` Robin Murphy
2022-09-07 12:14 ` Marc Zyngier
2022-09-07 12:14 ` Marc Zyngier
2022-09-07 11:35 ` Radovanovic, Aleksandar
2022-09-07 11:35 ` Radovanovic, Aleksandar
2022-09-07 12:32 ` Marc Zyngier
2022-09-07 13:18 ` Radovanovic, Aleksandar
2022-09-07 13:18 ` Radovanovic, Aleksandar
2022-09-08 8:08 ` Marc Zyngier
2022-09-08 9:51 ` Radovanovic, Aleksandar
2022-09-08 9:51 ` Radovanovic, Aleksandar
2022-09-08 11:49 ` Robin Murphy
2022-09-08 11:49 ` Robin Murphy
2022-09-08 14:18 ` Marc Zyngier
2022-09-07 13:18 ` Marc Zyngier
2022-09-07 13:18 ` Marc Zyngier
2022-09-08 14:13 ` Gupta, Nipun
2022-09-08 14:13 ` Gupta, Nipun
2022-09-08 14:29 ` Marc Zyngier
2022-09-09 6:32 ` Gupta, Nipun
2022-09-09 6:32 ` Gupta, Nipun
2022-10-12 10:04 ` Gupta, Nipun
2022-10-12 10:04 ` Gupta, Nipun
2022-10-12 10:34 ` Radovanovic, Aleksandar
2022-10-12 10:34 ` Radovanovic, Aleksandar
2022-10-12 13:02 ` Jason Gunthorpe
2022-10-12 13:02 ` Jason Gunthorpe
2022-10-12 13:37 ` Radovanovic, Aleksandar
2022-10-12 13:37 ` Radovanovic, Aleksandar
2022-10-12 14:38 ` Jason Gunthorpe
2022-10-12 14:38 ` Jason Gunthorpe
2022-10-12 15:09 ` Radovanovic, Aleksandar
2022-10-12 15:09 ` Radovanovic, Aleksandar
2022-10-13 12:43 ` Jason Gunthorpe
2022-10-13 12:43 ` Jason Gunthorpe
2022-10-14 11:18 ` Radovanovic, Aleksandar
2022-10-14 11:18 ` Radovanovic, Aleksandar
2022-10-14 11:54 ` gregkh
2022-10-14 11:54 ` gregkh
2022-10-14 12:13 ` Radovanovic, Aleksandar
2022-10-14 12:13 ` Radovanovic, Aleksandar
2022-10-14 13:46 ` gregkh
2022-10-14 13:46 ` gregkh
2022-10-14 13:58 ` Jason Gunthorpe
2022-10-14 13:58 ` Jason Gunthorpe
2022-09-06 13:47 ` [RFC PATCH v3 5/7] bus/cdx: add bus and device attributes Nipun Gupta
2022-09-06 13:47 ` Nipun Gupta
2022-09-06 13:48 ` [RFC PATCH v3 6/7] vfio/cdx: add support for CDX bus Nipun Gupta
2022-09-06 13:48 ` Nipun Gupta
2022-09-06 17:20 ` Jason Gunthorpe
2022-09-06 17:20 ` Jason Gunthorpe
2022-09-06 17:23 ` Gupta, Nipun
2022-09-06 17:23 ` Gupta, Nipun
2022-09-06 13:48 ` [RFC PATCH v3 7/7] vfio/cdx: add interrupt support Nipun Gupta
2022-09-06 13:48 ` Nipun Gupta
2022-10-14 4:40 ` [RFC PATCH v4 0/8] add support for CDX bus Nipun Gupta
2022-10-14 4:40 ` Nipun Gupta
2022-10-14 4:40 ` [RFC PATCH v4 1/8] dt-bindings: bus: add CDX bus device tree bindings Nipun Gupta
2022-10-14 4:40 ` Nipun Gupta
2022-10-14 14:17 ` Rob Herring
2022-10-14 14:17 ` Rob Herring
2022-10-17 10:18 ` Gupta, Nipun
2022-10-17 10:18 ` Gupta, Nipun
2022-10-14 4:40 ` [RFC PATCH v4 2/8] bus/cdx: add the cdx bus driver Nipun Gupta
2022-10-14 4:40 ` Nipun Gupta
2022-10-14 7:15 ` Greg KH
2022-10-14 7:15 ` Greg KH
2022-10-14 8:12 ` Gupta, Nipun
2022-10-14 8:12 ` Gupta, Nipun
2022-10-14 7:18 ` Greg KH
2022-10-14 7:18 ` Greg KH
2022-10-14 8:20 ` Gupta, Nipun
2022-10-14 8:20 ` Gupta, Nipun
2022-10-14 4:40 ` [RFC PATCH v4 3/8] iommu/arm-smmu-v3: support ops registration for CDX bus Nipun Gupta
2022-10-14 4:40 ` Nipun Gupta
2022-10-14 4:51 ` Gupta, Nipun
2022-10-14 4:51 ` Gupta, Nipun
2022-10-14 4:40 ` [RFC PATCH v4 4/8] bux/cdx: support dma configuration for CDX devices Nipun Gupta
2022-10-14 4:40 ` Nipun Gupta
2022-10-14 4:40 ` [RFC PATCH v4 5/8] bus/cdx: add bus and device attributes Nipun Gupta
2022-10-14 4:40 ` Nipun Gupta
2022-10-14 4:40 ` [RFC PATCH v4 6/8] irq/msi: use implicit msi domain for alloc and free Nipun Gupta
2022-10-14 4:40 ` Nipun Gupta
2022-10-14 4:40 ` [RFC PATCH v4 7/8] bus/cdx: add cdx-MSI domain with gic-its domain as parent Nipun Gupta
2022-10-14 4:40 ` Nipun Gupta
2022-10-17 13:08 ` kernel test robot
2022-11-17 19:10 ` Thomas Gleixner
2022-11-17 19:10 ` Thomas Gleixner
2022-10-14 4:40 ` [RFC PATCH v4 8/8] bus/cdx: add cdx controller Nipun Gupta
2022-10-14 4:40 ` Nipun Gupta
2022-10-14 14:10 ` [RFC PATCH v4 0/8] add support for CDX bus Rob Herring
2022-10-14 14:10 ` Rob Herring
2022-10-17 10:08 ` Gupta, Nipun
2022-10-17 10:08 ` Gupta, Nipun
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