From: Thomas Gleixner <tglx@linutronix.de>
To: Logan Gunthorpe <logang@deltatee.com>,
LKML <linux-kernel@vger.kernel.org>
Cc: Bjorn Helgaas <helgaas@kernel.org>, Marc Zygnier <maz@kernel.org>,
Alex Williamson <alex.williamson@redhat.com>,
Kevin Tian <kevin.tian@intel.com>,
Jason Gunthorpe <jgg@nvidia.com>, Megha Dey <megha.dey@intel.com>,
Ashok Raj <ashok.raj@intel.com>,
linux-pci@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jon Mason <jdmason@kudzu.us>, Dave Jiang <dave.jiang@intel.com>,
Allen Hubbe <allenbh@gmail.com>,
linux-ntb@googlegroups.com, linux-s390@vger.kernel.org,
Heiko Carstens <hca@linux.ibm.com>,
Christian Borntraeger <borntraeger@de.ibm.com>,
x86@kernel.org
Subject: Re: [patch 21/32] NTB/msi: Convert to msi_on_each_desc()
Date: Tue, 30 Nov 2021 20:48:03 +0100 [thread overview]
Message-ID: <87v909bf2k.ffs@tglx> (raw)
In-Reply-To: <d6f13729-1b83-fa7d-3f0d-98d4e3f7a2aa@deltatee.com>
Logan,
On Tue, Nov 30 2021 at 12:21, Logan Gunthorpe wrote:
> On 2021-11-29 5:29 p.m., Thomas Gleixner wrote:
>> I'm way too tired to come up with a proper solution for that, but that
>> PCI_IRQ_VIRTUAL has to die ASAP.
>
> I'm willing to volunteer a bit of my time to clean this up, but I'd need
> a bit more direction on what a proper solution would look like. The MSI
> domain code is far from well documented nor is it easy to understand.
Fair enough. I'm struggling with finding time to document that properly.
I've not yet made my mind up what the best way forward for this is, but
I have a few ideas which I want to explore deeper.
But the most important question is right now on which architectures
these switchtec virtual interrupt things are used.
If it's used on any architecture which does not use hierarchical
irqdomains for MSI (x86, arm, arm64, power64), then using irqdomains is
obviously a non-starter unless falling back to a single interrupt would
not be considered a regression :)
Thanks,
tglx
next prev parent reply other threads:[~2021-11-30 19:48 UTC|newest]
Thread overview: 184+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-27 1:22 [patch 00/32] genirq/msi, PCI/MSI: Spring cleaning - Part 2 Thomas Gleixner
2021-11-27 1:22 ` [patch 01/32] genirq/msi: Move descriptor list to struct msi_device_data Thomas Gleixner
2021-11-27 1:23 ` Thomas Gleixner
2021-11-27 12:19 ` Greg Kroah-Hartman
2021-11-27 1:22 ` [patch 02/32] genirq/msi: Add mutex for MSI list protection Thomas Gleixner
2021-11-27 1:23 ` Thomas Gleixner
2021-11-27 1:22 ` [patch 03/32] genirq/msi: Provide msi_domain_alloc/free_irqs_descs_locked() Thomas Gleixner
2021-11-27 1:23 ` Thomas Gleixner
2021-11-27 1:22 ` [patch 04/32] genirq/msi: Provide a set of advanced MSI accessors and iterators Thomas Gleixner
2021-11-27 1:23 ` Thomas Gleixner
2021-11-28 1:00 ` Jason Gunthorpe
2021-11-28 19:22 ` Thomas Gleixner
2021-11-29 9:26 ` Thomas Gleixner
2021-11-29 14:01 ` Jason Gunthorpe
2021-11-29 14:46 ` Thomas Gleixner
2021-11-27 1:22 ` [patch 05/32] genirq/msi: Provide msi_alloc_msi_desc() and a simple allocator Thomas Gleixner
2021-11-27 1:23 ` Thomas Gleixner
2021-11-27 1:22 ` [patch 06/32] genirq/msi: Provide domain flags to allocate/free MSI descriptors automatically Thomas Gleixner
2021-11-27 1:23 ` Thomas Gleixner
2021-11-27 1:22 ` [patch 07/32] genirq/msi: Count the allocated MSI descriptors Thomas Gleixner
2021-11-27 1:23 ` Thomas Gleixner
2021-11-27 12:19 ` Greg Kroah-Hartman
2021-11-27 19:22 ` Thomas Gleixner
2021-11-27 19:45 ` Thomas Gleixner
2021-11-28 11:07 ` Greg Kroah-Hartman
2021-11-28 19:23 ` Thomas Gleixner
2021-11-27 1:22 ` [patch 08/32] PCI/MSI: Protect MSI operations Thomas Gleixner
2021-11-27 1:23 ` Thomas Gleixner
2021-11-27 1:22 ` [patch 09/32] PCI/MSI: Use msi_add_msi_desc() Thomas Gleixner
2021-11-27 1:23 ` Thomas Gleixner
2021-11-27 1:22 ` [patch 10/32] PCI/MSI: Let core code free MSI descriptors Thomas Gleixner
2021-11-27 1:23 ` Thomas Gleixner
2021-11-27 1:22 ` [patch 11/32] PCI/MSI: Use msi_on_each_desc() Thomas Gleixner
2021-11-27 1:23 ` Thomas Gleixner
2021-11-27 1:22 ` [patch 12/32] x86/pci/xen: Use msi_for_each_desc() Thomas Gleixner
2021-11-27 1:23 ` Thomas Gleixner
2021-11-27 1:22 ` [patch 13/32] xen/pcifront: Rework MSI handling Thomas Gleixner
2021-11-27 1:23 ` Thomas Gleixner
2021-11-27 1:22 ` [patch 14/32] s390/pci: Rework MSI descriptor walk Thomas Gleixner
2021-11-27 1:23 ` Thomas Gleixner
2021-11-29 10:31 ` Niklas Schnelle
2021-11-29 13:04 ` Thomas Gleixner
2021-11-27 1:22 ` [patch 15/32] powerpc/4xx/hsta: Rework MSI handling Thomas Gleixner
2021-11-27 1:23 ` Thomas Gleixner
2021-11-27 1:22 ` [patch 16/32] powerpc/cell/axon_msi: Convert to msi_on_each_desc() Thomas Gleixner
2021-11-27 1:23 ` Thomas Gleixner
2021-11-27 1:22 ` [patch 17/32] powerpc/pasemi/msi: Convert to msi_on_each_dec() Thomas Gleixner
2021-11-27 1:23 ` Thomas Gleixner
2021-11-27 1:22 ` [patch 18/32] powerpc/fsl_msi: Use msi_for_each_desc() Thomas Gleixner
2021-11-27 1:23 ` Thomas Gleixner
2021-11-27 1:22 ` [patch 19/32] powerpc/mpic_u3msi: Use msi_for_each-desc() Thomas Gleixner
2021-11-27 1:23 ` Thomas Gleixner
2021-11-27 1:22 ` [patch 20/32] PCI: hv: Rework MSI handling Thomas Gleixner
2021-11-27 1:24 ` Thomas Gleixner
2021-11-27 1:23 ` [patch 21/32] NTB/msi: Convert to msi_on_each_desc() Thomas Gleixner
2021-11-27 1:24 ` Thomas Gleixner
2021-11-29 18:21 ` Logan Gunthorpe
2021-11-29 20:51 ` Thomas Gleixner
2021-11-29 22:27 ` Logan Gunthorpe
2021-11-29 22:50 ` Dave Jiang
2021-11-29 23:31 ` Jason Gunthorpe
2021-11-29 23:52 ` Logan Gunthorpe
2021-11-30 0:01 ` Jason Gunthorpe
2021-11-30 0:29 ` Thomas Gleixner
2021-11-30 19:21 ` Logan Gunthorpe
2021-11-30 19:48 ` Thomas Gleixner [this message]
2021-11-30 20:14 ` Logan Gunthorpe
2021-11-30 20:28 ` Jason Gunthorpe
2021-11-30 21:23 ` Thomas Gleixner
2021-12-01 0:17 ` Jason Gunthorpe
2021-12-01 10:16 ` Thomas Gleixner
2021-12-01 13:00 ` Jason Gunthorpe
2021-12-01 17:35 ` Thomas Gleixner
2021-12-01 18:14 ` Jason Gunthorpe
2021-12-01 18:46 ` Logan Gunthorpe
2021-12-01 20:21 ` Thomas Gleixner
2021-12-02 0:01 ` Thomas Gleixner
2021-12-02 13:55 ` Jason Gunthorpe
2021-12-02 14:23 ` Greg Kroah-Hartman
2021-12-02 14:45 ` Jason Gunthorpe
2021-12-02 19:25 ` Thomas Gleixner
2021-12-02 20:00 ` Jason Gunthorpe
2021-12-02 22:31 ` Thomas Gleixner
2021-12-03 0:37 ` Jason Gunthorpe
2021-12-03 15:07 ` Thomas Gleixner
2021-12-03 16:41 ` Jason Gunthorpe
2021-12-04 14:20 ` Thomas Gleixner
2021-12-05 14:16 ` Thomas Gleixner
2021-12-06 14:43 ` Jason Gunthorpe
2021-12-06 15:47 ` Thomas Gleixner
2021-12-06 17:00 ` Jason Gunthorpe
2021-12-06 20:28 ` Thomas Gleixner
2021-12-06 21:06 ` Jason Gunthorpe
2021-12-06 22:21 ` Thomas Gleixner
2021-12-06 14:19 ` Jason Gunthorpe
2021-12-06 15:06 ` Thomas Gleixner
2021-12-09 6:26 ` Tian, Kevin
2021-12-09 9:03 ` Thomas Gleixner
2021-12-09 12:17 ` Tian, Kevin
2021-12-09 15:57 ` Thomas Gleixner
2021-12-10 7:37 ` Tian, Kevin
2021-12-09 5:41 ` Tian, Kevin
2021-12-09 5:47 ` Jason Wang
2021-12-01 16:28 ` Dave Jiang
2021-12-01 18:41 ` Thomas Gleixner
2021-12-01 18:47 ` Dave Jiang
2021-12-01 20:25 ` Thomas Gleixner
2021-12-01 21:21 ` Dave Jiang
2021-12-01 21:44 ` Thomas Gleixner
2021-12-01 21:49 ` Dave Jiang
2021-12-01 22:03 ` Thomas Gleixner
2021-12-01 22:53 ` Dave Jiang
2021-12-01 23:57 ` Thomas Gleixner
2021-12-09 5:23 ` Tian, Kevin
2021-12-09 8:37 ` Thomas Gleixner
2021-12-09 12:31 ` Tian, Kevin
2021-12-09 16:21 ` Jason Gunthorpe
2021-12-09 20:32 ` Thomas Gleixner
2021-12-09 20:58 ` Jason Gunthorpe
2021-12-09 22:09 ` Thomas Gleixner
2021-12-10 0:26 ` Thomas Gleixner
2021-12-10 7:29 ` Tian, Kevin
2021-12-10 12:13 ` Thomas Gleixner
2021-12-11 8:06 ` Tian, Kevin
2021-12-10 12:39 ` Jason Gunthorpe
2021-12-10 19:00 ` Thomas Gleixner
2021-12-11 7:44 ` Tian, Kevin
2021-12-11 13:04 ` Thomas Gleixner
2021-12-12 1:56 ` Tian, Kevin
2021-12-12 20:55 ` Thomas Gleixner
2021-12-12 23:37 ` Jason Gunthorpe
2021-12-13 7:50 ` Tian, Kevin
2022-09-15 9:24 ` Tian, Kevin
2022-09-20 14:09 ` Jason Gunthorpe
2022-09-21 7:57 ` Tian, Kevin
2022-09-21 12:48 ` Jason Gunthorpe
2022-09-22 5:11 ` Tian, Kevin
2022-09-22 12:13 ` Jason Gunthorpe
2022-09-22 22:42 ` Tian, Kevin
2022-09-23 13:26 ` Jason Gunthorpe
2021-12-11 7:52 ` Tian, Kevin
2021-12-12 0:12 ` Thomas Gleixner
2021-12-12 2:14 ` Tian, Kevin
2021-12-12 20:50 ` Thomas Gleixner
2021-12-12 23:42 ` Jason Gunthorpe
2021-12-10 7:36 ` Tian, Kevin
2021-12-10 12:30 ` Jason Gunthorpe
2021-12-12 6:44 ` Mika Penttilä
2021-12-12 23:27 ` Jason Gunthorpe
2021-12-01 14:52 ` Thomas Gleixner
2021-12-01 15:11 ` Jason Gunthorpe
2021-12-01 18:37 ` Thomas Gleixner
2021-12-01 18:47 ` Jason Gunthorpe
2021-12-01 20:26 ` Thomas Gleixner
2022-12-05 18:25 ` [tip: irq/core] PCI/MSI: Provide post-enable dynamic allocation interfaces for MSI-X tip-bot2 for Thomas Gleixner
2022-12-05 21:41 ` tip-bot2 for Thomas Gleixner
2021-11-27 1:23 ` [patch 22/32] soc: ti: ti_sci_inta_msi: Rework MSI descriptor allocation Thomas Gleixner
2021-11-27 1:24 ` Thomas Gleixner
2021-11-27 1:23 ` [patch 23/32] soc: ti: ti_sci_inta_msi: Remove ti_sci_inta_msi_domain_free_irqs() Thomas Gleixner
2021-11-27 1:24 ` Thomas Gleixner
2021-11-27 1:23 ` [patch 24/32] bus: fsl-mc-msi: Simplify MSI descriptor handling Thomas Gleixner
2021-11-27 1:24 ` Thomas Gleixner
2021-11-27 1:23 ` [patch 25/32] platform-msi: Let core code handle MSI descriptors Thomas Gleixner
2021-11-27 1:24 ` Thomas Gleixner
2021-11-27 1:23 ` [patch 26/32] platform-msi: Simplify platform device MSI code Thomas Gleixner
2021-11-27 1:24 ` Thomas Gleixner
2021-11-27 1:23 ` [patch 27/32] genirq/msi: Make interrupt allocation less convoluted Thomas Gleixner
2021-11-27 1:24 ` Thomas Gleixner
2021-11-27 1:23 ` [patch 28/32] genirq/msi: Convert to new functions Thomas Gleixner
2021-11-27 1:24 ` Thomas Gleixner
2021-11-27 1:23 ` [patch 29/32] genirq/msi: Mop up old interfaces Thomas Gleixner
2021-11-27 1:24 ` Thomas Gleixner
2021-11-27 1:23 ` [patch 30/32] genirq/msi: Add abuse prevention comment to msi header Thomas Gleixner
2021-11-27 1:24 ` Thomas Gleixner
2021-11-27 1:23 ` [patch 31/32] genirq/msi: Simplify sysfs handling Thomas Gleixner
2021-11-27 1:24 ` Thomas Gleixner
2021-11-27 12:32 ` Greg Kroah-Hartman
2021-11-27 19:31 ` Thomas Gleixner
2021-11-28 11:07 ` Greg Kroah-Hartman
2021-11-28 19:33 ` Thomas Gleixner
2021-11-27 1:23 ` [patch 32/32] genirq/msi: Convert storage to xarray Thomas Gleixner
2021-11-27 1:24 ` Thomas Gleixner
2021-11-27 12:33 ` Greg Kroah-Hartman
2021-11-27 1:23 ` [patch 00/32] genirq/msi, PCI/MSI: Spring cleaning - Part 2 Thomas Gleixner
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