Re: [RFC PATCH v3 3/3] softmmu/physmem: Introduce MemTxAttrs::memory field and MEMTX_BUS_ERROR

[Stefan Hajnoczi]

On Wed, Dec 15, 2021 at 07:24:21PM +0100, Philippe Mathieu-Daudé wrote:
> Add the 'memory' bit to the memory attributes to restrict bus
> controller accesses to memories.
> 
> Introduce flatview_access_allowed() to check bus permission
> before running any bus transaction.
> 
> Have read/write accessors return MEMTX_BUS_ERROR if an access is
> restricted.
> 
> There is no change for the default case where 'memory' is not set.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
> ---
>  include/exec/memattrs.h |  9 +++++++++
>  softmmu/physmem.c       | 43 +++++++++++++++++++++++++++++++++++++++--
>  2 files changed, 50 insertions(+), 2 deletions(-)

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>

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