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Re: [patch V3 26/35] genirq/msi: Provide interface to retrieve Linux interrupt number
- To: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
- From: Jason Gunthorpe <jgg@xxxxxxxxxx>
- Date: Mon, 13 Dec 2021 10:22:48 -0400
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- Cc: LKML <linux-kernel@xxxxxxxxxxxxxxx>, Bjorn Helgaas <helgaas@xxxxxxxxxx>, Marc Zygnier <maz@xxxxxxxxxx>, Alex Williamson <alex.williamson@xxxxxxxxxx>, Kevin Tian <kevin.tian@xxxxxxxxx>, Megha Dey <megha.dey@xxxxxxxxx>, Ashok Raj <ashok.raj@xxxxxxxxx>, linux-pci@xxxxxxxxxxxxxxx, Cedric Le Goater <clg@xxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, Arnd Bergmann <arnd@xxxxxxxx>, Michael Ellerman <mpe@xxxxxxxxxxxxxx>, Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>, linuxppc-dev@xxxxxxxxxxxxxxxx, Bjorn Helgaas <bhelgaas@xxxxxxxxxx>, Stuart Yoder <stuyoder@xxxxxxxxx>, Laurentiu Tudor <laurentiu.tudor@xxxxxxx>, Nishanth Menon <nm@xxxxxx>, Tero Kristo <kristo@xxxxxxxxxx>, Santosh Shilimkar <ssantosh@xxxxxxxxxx>, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, Vinod Koul <vkoul@xxxxxxxxxx>, dmaengine@xxxxxxxxxxxxxxx, Mark Rutland <mark.rutland@xxxxxxx>, Will Deacon <will@xxxxxxxxxx>, Robin Murphy <robin.murphy@xxxxxxx>, Joerg Roedel <joro@xxxxxxxxxx>, iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx, Jassi Brar <jassisinghbrar@xxxxxxxxx>, Peter Ujfalusi <peter.ujfalusi@xxxxxxxxx>, Sinan Kaya <okaya@xxxxxxxxxx>
- Delivery-date: Mon, 13 Dec 2021 14:23:25 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Fri, Dec 10, 2021 at 11:19:23PM +0100, Thomas Gleixner wrote:
> From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
>
> This allows drivers to retrieve the Linux interrupt number instead of
> fiddling with MSI descriptors.
>
> msi_get_virq() returns the Linux interrupt number or 0 in case that there
> is no entry for the given MSI index.
>
> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> ---
> V2: Simplify the implementation and let PCI deal with the PCI specialities -
> Marc
> ---
> include/linux/msi.h | 2 ++
> kernel/irq/msi.c | 36 ++++++++++++++++++++++++++++++++++++
> 2 files changed, 38 insertions(+)
Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Jason
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