From: Jason Gunthorpe <jgg@nvidia.com>
To: Wathsala Wathawana Vithanage <wathsala.vithanage@arm.com>
Cc: Jeremy Linton <Jeremy.Linton@arm.com>,
Jonathan Cameron <Jonathan.Cameron@huawei.com>,
"linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
"acpica-devel@lists.linux.dev" <acpica-devel@lists.linux.dev>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"lenb@kernel.org" <lenb@kernel.org>,
"robert.moore@intel.com" <robert.moore@intel.com>,
"bhelgaas@google.com" <bhelgaas@google.com>,
"wei.huang2@amd.com" <wei.huang2@amd.com>,
Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>,
Dhruv Tripathi <Dhruv.Tripathi@arm.com>,
Rob Herring <Rob.Herring@arm.com>, nd <nd@arm.com>
Subject: Re: [RFC 0/2] GENL interface for ACPI _DSM methods
Date: Thu, 9 Jan 2025 09:46:17 -0400 [thread overview]
Message-ID: <20250109134617.GW5556@nvidia.com> (raw)
In-Reply-To: <PAWPR08MB89099DA1BF11CACBA14E21359F132@PAWPR08MB8909.eurprd08.prod.outlook.com>
> > > This RFC is only about acquiring the steering tag from the ACPI _DSM,
> > > which the DPDK user space driver will set in the queue context
> > > of the device it manages.
> > > Setting of the steering tag part happens in the DPDK device driver.
> > > Are you suggesting that I should instead pass a CPU and a cache ID to
> > > VFIO and let VFIO decide what's right for the application?
> >
> > I think that would be better, yes. Get VFIO to give you the steering tag
> > information, and any related control of the config space you may need, via an
> > IOCTL.
>
> Sounds good, I like that idea.
Yeah, remember there is a broad complexity here. Some devices want to
setup their steering tag information through the MSI-X table, for
instance. VFIO is the right place to assist DPDK with all of these
cases that need kernel involvement.
Jason
prev parent reply other threads:[~2025-01-09 13:46 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-01-06 16:30 [RFC 0/2] GENL interface for ACPI _DSM methods Wathsala Vithanage
2025-01-06 16:30 ` [RFC PATCH 1/2] ACPI: Add support for invoking select _DSM methods from user space Wathsala Vithanage
2025-01-06 16:30 ` [RFC PATCH 2/2] PCI: Add generic netlink interface to TPH _DSM Wathsala Vithanage
2025-01-06 18:01 ` [RFC 0/2] GENL interface for ACPI _DSM methods Jonathan Cameron
2025-01-07 17:37 ` Jeremy Linton
2025-01-07 17:48 ` Jason Gunthorpe
2025-01-08 19:59 ` Jeremy Linton
2025-01-08 20:50 ` Jason Gunthorpe
2025-01-09 0:34 ` Wathsala Wathawana Vithanage
2025-01-09 13:38 ` Jason Gunthorpe
2025-01-09 13:42 ` Wathsala Wathawana Vithanage
2025-01-09 13:46 ` Jason Gunthorpe [this message]
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