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Diffstat (limited to 'docs/system/arm/cpu-features.rst')
| -rw-r--r-- | docs/system/arm/cpu-features.rst | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/docs/system/arm/cpu-features.rst b/docs/system/arm/cpu-features.rst index 6bb88a40c7..a5fb929243 100644 --- a/docs/system/arm/cpu-features.rst +++ b/docs/system/arm/cpu-features.rst @@ -210,15 +210,20 @@ TCG VCPU Features TCG VCPU features are CPU features that are specific to TCG. Below is the list of TCG VCPU features and their descriptions. +``pauth`` + Enable or disable ``FEAT_Pauth`` entirely. + ``pauth-impdef`` - When ``FEAT_Pauth`` is enabled, either the *impdef* (Implementation - Defined) algorithm is enabled or the *architected* QARMA algorithm - is enabled. By default the impdef algorithm is disabled, and QARMA - is enabled. - - The architected QARMA algorithm has good cryptographic properties, - but can be quite slow to emulate. The impdef algorithm used by QEMU - is non-cryptographic but significantly faster. + When ``pauth`` is enabled, select the QEMU implementation defined algorithm. + +``pauth-qarma3`` + When ``pauth`` is enabled, select the architected QARMA3 algorithm. + +Without either ``pauth-impdef`` or ``pauth-qarma3`` 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 +non-cryptographic but significantly faster. SVE CPU Properties ================== |