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Re: [Qemu-devel] [PATCH 2/2] target/arm: Take exceptions on ATS instruct
From: |
Richard Henderson |
Subject: |
Re: [Qemu-devel] [PATCH 2/2] target/arm: Take exceptions on ATS instructions when needed |
Date: |
Sun, 18 Aug 2019 07:23:17 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 |
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~