Re: [RFC PATCH v2 0/5] physmem: Have flaview API check bus permission from MemTxAttrs argument

[Stefan Hajnoczi]

On Mon, Aug 23, 2021 at 06:41:52PM +0200, Philippe Mathieu-Daudé wrote:
> This series aim to kill a recent class of bug, the infamous
> "DMA reentrancy" issues found by Alexander while fuzzing.
> 
> Introduce the 'bus_perm' field in MemTxAttrs, defining 3 bits:
> 
> - MEMTXPERM_UNSPECIFIED (current default, unchanged behavior)
> - MEMTXPERM_UNRESTRICTED (allow list approach)
> - MEMTXPERM_RAM_DEVICE (example of deny list approach)

These names don't hint at their descriptions. I wouldn't be able to tell
what they do based on the name. I'll think more about naming after
reviewing the patches.

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