linux-kernel - [PATCH 1/2] PCI: hv: enable pci_hyperv to allow dynamic vector allocation

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Message-ID:
 <SI2P153MB07354B3C1D0FD751D6331D9DD3B82@SI2P153MB0735.APCP153.PROD.OUTLOOK.COM>
Date: Mon, 21 Apr 2025 06:33:50 +0000
From: Shradha Gupta <shradhagupta@...rosoft.com>
To: Thomas Gleixner <tglx@...utronix.de>, Shradha Gupta
	<shradhagupta@...ux.microsoft.com>, "linux-hyperv@...r.kernel.org"
	<linux-hyperv@...r.kernel.org>, "linux-pci@...r.kernel.org"
	<linux-pci@...r.kernel.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "Gupta, Nipun" <nipun.gupta@....com>, Yury
 Norov <yury.norov@...il.com>, Jason Gunthorpe <jgg@...pe.ca>, Jonathan
 Cameron <Jonathan.Cameron@...ei.com>, Anna-Maria Behnsen
	<anna-maria@...utronix.de>, Shradha Gupta <shradhagupta@...ux.microsoft.com>,
	Shivamurthy Shastri <shivamurthy.shastri@...utronix.de>, Kevin Tian
	<kevin.tian@...el.com>, Long Li <longli@...rosoft.com>, Bjorn Helgaas
	<bhelgaas@...gle.com>, Rob Herring <robh@...nel.org>, Manivannan Sadhasivam
	<manivannan.sadhasivam@...aro.org>, Krzysztof Wilczyński
	<kw@...ux.com>, Lorenzo Pieralisi <lpieralisi@...nel.org>, Dexuan Cui
	<decui@...rosoft.com>, Wei Liu <wei.liu@...nel.org>, Haiyang Zhang
	<haiyangz@...rosoft.com>, KY Srinivasan <kys@...rosoft.com>, Andrew Lunn
	<andrew+netdev@...n.ch>, "David S. Miller" <davem@...emloft.net>, Eric
 Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
	<pabeni@...hat.com>, Konstantin Taranov <kotaranov@...rosoft.com>, Simon
 Horman <horms@...nel.org>, Leon Romanovsky <leon@...nel.org>, Maxim Levitsky
	<mlevitsk@...hat.com>, Erni Sri Satya Vennela <ernis@...ux.microsoft.com>,
	Peter Zijlstra <peterz@...radead.org>, "netdev@...r.kernel.org"
	<netdev@...r.kernel.org>, "linux-rdma@...r.kernel.org"
	<linux-rdma@...r.kernel.org>, Paul Rosswurm <paulros@...rosoft.com>
Subject: [PATCH 1/2] PCI: hv: enable pci_hyperv to allow dynamic vector
 allocation

>On Wed, Apr 16 2025 at 08:36, Shradha Gupta wrote:
>> For supporting dynamic MSI vector allocation by pci controllers, enabling
>> the flag MSI_FLAG_PCI_MSIX_ALLOC_DYN is not enough, msix_prepare_msi_desc()
>> to prepare the desc is needed. Export pci_msix_prepare_desc() to allow pci
>> controllers like pci-hyperv to support dynamic MSI vector allocation.
>>Also, add the flag MSI_FLAG_PCI_MSIX_ALLOC_DYN and use
>> pci_msix_prepare_desc() in pci_hyperv controller
>
>Seems your newline key is broken. Please structure changelogs properly
>
>in paragraphs:
>
>
>https://www.kernel.org/doc/html/latest/process/maintainer->tip.html%23changelog&data=05%7C02%7Cshradhagupta%40microsoft.com%7Cb1abd0d5505243eacd4c08dd7d96afa6%7C72f988bf86f141af91ab2d7cd011db47%7C1%>7C0%7C638804808451114975%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3%3D%7C0%7C%7C%7C&sdata=Q4YgrhG0y7nFuYYePe3QVydzUQJ2owKiqWZwLkZjCR0%3D&reserved=0

>>  drivers/pci/controller/pci-hyperv.c | 7 +++++--
>> drivers/pci/msi/irqdomain.c         | 5 +++--
>> include/linux/msi.h                 | 2 ++
>
>This wants to be split into a patch which exports
>pci_msix_prepare_desc() and one which enables the functionality in
>PCI/HV.
>
>Thanks,
>
>      tglx

Thanks for all the comments, Thomas. I will incorporate all these and send out the next version.
We are facing some issues with mutt, hence I am replying through outlook. Apologies
for the issues with formatting for this reply. :)