linux-kernel - Re: [PATCH v2 0/2] ACPI / PCI: Fix _PRT lookup for ARI enabled devices

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Message-ID: <5565E2AA.5030705@redhat.com>
Date:	Wed, 27 May 2015 11:28:42 -0400
From:	Don Dutile <ddutile@...hat.com>
To:	Alex Williamson <alex.williamson@...hat.com>,
	linux-acpi@...r.kernel.org, linux-pci@...r.kernel.org
CC:	bhelgaas@...gle.com, rjw@...ysocki.net,
	linux-kernel@...r.kernel.org, lenb@...nel.org
Subject: Re: [PATCH v2 0/2] ACPI / PCI: Fix _PRT lookup for ARI enabled devices

On 05/26/2015 05:11 PM, Alex Williamson wrote:
> v2: don't modify entry->id.device
>
> In most cases we only use ARI with SR-IOV VFs, which do not support
> INTx and therefore never hit this problem.  However, some non-SR-IOV
> implementations create multiple PFs, extending beyond the standard
> 3-bit function numbers with ARI, and do support INTx for those
> additional functions.  This can happen with Solarflare SFC9120
> adapters.  The host driver typically doesn't use INTx, so we also
> haven't noticed this problem on bare metal, but when we attempt to
> assign the device to a VM using vfio-pci, we fail trying to setup
> default INTx signaling.  Thanks,
>
> Alex
>
> ---
>
> Alex Williamson (2):
>        PCI: Move pci_ari_enabled() to global header
>        ACPI / PCI: Account for ARI in _PRT lookups
>
>
>   drivers/acpi/pci_irq.c |    2 +-
>   drivers/pci/pci.h      |   11 -----------
>   include/linux/pci.h    |   11 +++++++++++
>   3 files changed, 12 insertions(+), 12 deletions(-)
> --
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>
Feel free to add my Reviewed-by / Acked-by

-dd
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