what does pci command output mean when use it during checking a BSOD dump file?

Barton Xu 1 Reputation point
2022-11-30T07:57:25.757+00:00

I am checking a GPU lost issue from a BSOD dump file(not live debug), by !pci 100 1 0 0, all the registers are ff, does this mean GPU pcie config is really cannot be accessed at the time BSOD happened?
How does Windows save the data for pci command while generate dump?

From my experience, I saw GPU registers are ff if GPU lost, not ff if GPU is on PCIE bus.
But this case, I found GPU upstream root port, !pci 100 0 1 0, are also 0xFF,
this is strange, because root port should be there.

So I wonder to know if root port really disappeared or the ff is caused by windows dump mechanism?

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