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Re: Re: [RFC] hw/nvme: Use irqfd to send interrupts
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From: |
樊金昊 |
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Subject: |
Re: Re: [RFC] hw/nvme: Use irqfd to send interrupts |
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Date: |
Wed, 10 Aug 2022 00:48:53 +0800 (GMT+08:00) |
> The driver will create the cq with an allocated vector, but it's not
activated
> until after the driver wires it up to a handler. I think that's what you're
> observing with the incomplete MSIx table entry on creation.
Also, I'm wondering if this is inconsistent with the NVMe spec. In Section 7.6.1
of the 1.4 spec, it says "After determining the number of I/O Queues, the MSI
and/or MSI-X registers should be configured;" in Step 8, and CQ creation happens
in Step 9. Now the driver changes MSI-X registers after CQ creation, is it a
violation of the spec?