NetBSD Problem Report #57766

From www@netbsd.org  Mon Dec 11 00:32:02 2023
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Date: Mon, 11 Dec 2023 00:32:01 +0000 (UTC)
From: campbell+netbsd@mumble.net
Reply-To: campbell+netbsd@mumble.net
To: gnats-bugs@NetBSD.org
Subject: pcictl dump doesn't show BAR sizes
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>Number:         57766
>Category:       bin
>Synopsis:       pcictl dump doesn't show BAR sizes
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Dec 11 00:35:00 +0000 2023
>Originator:     Taylor R Campbell
>Release:        current
>Organization:
The NetBAR Foundation
>Environment:
>Description:
The `pcictl dump' command shows the address of each BAR, but not the size of each BAR.

It should print the size too.
>How-To-Repeat:
pcictl dump
>Fix:
Yes, please!

The kernel may have to determine this on userland's behalf, because it involves writing to the BAR to find which bits of the address are write-ignore/read-as-zero and which bits are mutable.

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