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Re: [PATCH 2/5] target/arm: Enable FEAT_CSV2_3 for -cpu max


From: Philippe Mathieu-Daudé
Subject: Re: [PATCH 2/5] target/arm: Enable FEAT_CSV2_3 for -cpu max
Date: Thu, 18 Apr 2024 18:11:44 +0200
User-agent: Mozilla Thunderbird

On 18/4/24 17:20, Peter Maydell wrote:
FEAT_CSV2_3 adds a mechanism to identify if hardware cannot disclose
information about whether branch targets and branch history trained
in one hardware described context can control speculative execution
in a different hardware context.

There is no branch prediction in TCG, so we don't need to do anything
to be compliant with this.  Upadte the '-cpu max' ID registers to
advertise the feature.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
  docs/system/arm/emulation.rst | 1 +
  target/arm/tcg/cpu64.c        | 4 ++--
  2 files changed, 3 insertions(+), 2 deletions(-)

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>




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