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target/arm: add new property to select pauth-qarma5

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Before changing default pauth algorithm, we need to make sure current
default one (QARMA5) can still be selected.

$ qemu-system-aarch64 -cpu max,pauth-qarma5=on ...

Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20241219183211.3493974-2-pierrick.bouvier@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Pierrick Bouvier 2025-01-13 12:35:34 +00:00 • committed by Peter Maydell
parent 538b764d34
commit 86a00f2046
5 changed files with 31 additions and 12 deletions
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5
docs/system/arm/cpu-features.rst
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@ -219,7 +219,10 @@ Below is the list of TCG VCPU features and their descriptions.
``pauth-qarma3``
When ``pauth`` is enabled, select the architected QARMA3 algorithm.
Without either ``pauth-impdef`` or ``pauth-qarma3`` enabled,
``pauth-qarma5``
When ``pauth`` is enabled, select the architected QARMA5 algorithm.
Without ``pauth-impdef``, ``pauth-qarma3`` or ``pauth-qarma5`` enabled,
the architected QARMA5 algorithm is used. The architected QARMA5
and QARMA3 algorithms have good cryptographic properties, but can
be quite slow to emulate. The impdef algorithm used by QEMU is