Re: [Qemu-devel] [PATCH 2/2] target/arm: Take exceptions on ATS instructions when needed

[Richard Henderson]

On 8/16/19 1:58 PM, Peter Maydell wrote:
> The translation table walk for an ATS instruction can result in
> various faults.  In general these are just reported back via the
> PAR_EL1 fault status fields, but in some cases the architecture
> requires that the fault is turned into an exception:
>  * synchronous stage 2 faults of any kind during AT S1E0* and
>    AT S1E1* instructions executed from NS EL1 fault to EL2 or EL3
>  * synchronous external aborts are taken as Data Abort exceptions
> 
> (This is documented in the v8A Arm ARM DDI0487A.e D5.2.11 and
> G5.13.4.)
> 
> Signed-off-by: Peter Maydell <address@hidden>
> ---
>  target/arm/helper.c | 107 +++++++++++++++++++++++++++++++++++++-------
>  1 file changed, 92 insertions(+), 15 deletions(-)

Reviewed-by: Richard Henderson <address@hidden>


r~