Re: [RFC PATCH] memory: Introduce memory region fetch operation

[Ethan Chen via]

On Wed, Jun 12, 2024 at 01:43:41PM +0100, Peter Maydell wrote:
> 
> On Wed, 12 Jun 2024 at 10:02, Ethan Chen via  wrote:
> >
> > Allow the memory region to have different behaviors for read and fetch
> > operations.
> >
> > For example RISCV IOPMP will raise interrupt when cpu try to fetch a
> > non-excutable region.
> 
> It actually raises an interrupt rather than it being a permissions fault?

Device can return bus error, interrupt or success with fabricated data.

> 
> > If fetch operation of a memory region is not implemented, it still uses the
> > read operation for fetch.
> 
> This patch should probably be part of the series with the device that
> needs it.

I will add this patch to IOPMP patch series.

Thanks,
Ethan

Re: [RFC PATCH] memory: Introduce memory region fetch operation

[Peter Maydell]

On Wed, 12 Jun 2024 at 10:02, Ethan Chen via  wrote:
>
> Allow the memory region to have different behaviors for read and fetch
> operations.
>
> For example RISCV IOPMP will raise interrupt when cpu try to fetch a
> non-excutable region.

It actually raises an interrupt rather than it being a permissions fault?

> If fetch operation of a memory region is not implemented, it still uses the
> read operation for fetch.

This patch should probably be part of the series with the device that
needs it.

thanks
-- PMM