Re: [RFC PATCH 00/12] hw: Forbid DMA write accesses to MMIO regions

Wed, 09 Sep 2020 02:14:32 -0700 

On Thu, Sep 03, 2020 at 01:08:19PM +0200, Philippe Mathieu-Daudé wrote:
> The main patch is:
> "exec/memattrs: Introduce MemTxAttrs::direct_access field".
> This way we can restrict accesses to ROM/RAM by setting the
> 'direct_access' field. Illegal accesses return MEMTX_BUS_ERROR.

QEMU needs to simulate the behavior of real hardware. What is the
behavior of real hardware?

Stefan

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