Re: [PATCH v4 41/45] target/arm: Enable FEAT_CSV2_2 for -cpu max

[Peter Maydell]

On Sun, 1 May 2022 at 08:16, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> There is no branch prediction in TCG, therefore there is no
> need to actually include the context number into the predictor.
> Therefore all we need to do is add the state for SCXTNUM_ELx.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> v2: Update emulation.rst; clear CSV2_FRAC; use decimal; tidy access_scxtnum.
> v3: Rely on EL3-no-EL2 squashing during registration.
> ---
>  docs/system/arm/emulation.rst |  3 ++
>  target/arm/cpu.h              | 16 +++++++++
>  target/arm/cpu64.c            |  3 +-
>  target/arm/helper.c           | 61 ++++++++++++++++++++++++++++++++++-
>  4 files changed, 81 insertions(+), 2 deletions(-)

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

(The handling of SCXTNUM_EL0 should Just Work for user-mode-only,
right?)

thanks
-- PMM