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Re: [PATCH] hw/vfio/pci-quirks: Support alternate offset for GPUDirect C
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From: |
Alex Williamson |
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Subject: |
Re: [PATCH] hw/vfio/pci-quirks: Support alternate offset for GPUDirect Cliques |
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Date: |
Thu, 8 Jun 2023 11:46:30 -0600 |
On Thu, 8 Jun 2023 11:42:11 -0600
Alex Williamson <alex.williamson@redhat.com> wrote:
> NVIDIA Turing and newer GPUs implement the MSI-X capability at the offset
> previously reserved for use by hypervisors to implement the GPUDirect
> Cliques capability. A revised specification provides an alternate
> location. Add a config space walk to the quirk to check for conflicts,
> allowing us to fall back to the new location or generate an error at the
> quirk setup rather than when the real conflicting capability is added
> should there be no available location.
>
> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
> ---
>
> The specification doesn't have a public home, but I've been given
> permission to post it to the list. Therefore I'll reply to this with
> the document attached and update the link in a v2 posting once that's
> available in the list archive.
Updated spec attached. Thanks,
Alex
NVIDIA GPUDirect with PCI Pass-Through Virtualization.pdf
Description: Adobe PDF document