Re: [Qemu-devel] [PATCH 04/19] target/arm: Define an IDAU interface

[Richard Henderson <richard.henderson@linaro.org>]

On 02/20/2018 10:03 AM, Peter Maydell wrote:
> In v8M, the Implementation Defined Attribution Unit (IDAU) is
> a small piece of hardware typically implemented in the SoC
> which provides board or SoC specific security attribution
> information for each address that the CPU performs MPU/SAU
> checks on. For QEMU, we model this with a QOM interface which
> is implemented by the board or SoC object and connected to
> the CPU using a link property.
> 
> This commit defines the new interface class, adds the link
> property to the CPU object, and makes the SAU checking
> code call the IDAU interface if one is present.
> 
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
> ---
> An example of an object that implements the IDAU can be
> found in the later patch "hw/arm/iotkit: Model Arm IOT Kit".
> ---
>  target/arm/cpu.h    |  3 +++
>  target/arm/idau.h   | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++++
>  target/arm/cpu.c    | 15 +++++++++++++
>  target/arm/helper.c | 28 +++++++++++++++++++++---
>  4 files changed, 104 insertions(+), 3 deletions(-)
>  create mode 100644 target/arm/idau.h

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>


r~