diff options
| author | Richard Henderson <richard.henderson@linaro.org> | 2023-08-29 16:23:28 -0700 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2023-09-08 12:50:44 +0100 |
| commit | 399e5e71253469630b4a41089ae5fde04d95ac68 (patch) | |
| tree | 429fefd9c9ffee66802aca4cf8b35d338a2502fc /docs/system | |
| parent | 6c3427eec532d534fae05d8aa740a9dcca5826e8 (diff) | |
target/arm: Implement FEAT_PACQARMA3
Implement the QARMA3 cryptographic algorithm for PAC calculation.
Implement a cpu feature to select the algorithm and document it.
Signed-off-by: Aaron Lindsay <aaron@os.amperecomputing.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230829232335.965414-6-richard.henderson@linaro.org
Message-Id: <20230609172324.982888-4-aaron@os.amperecomputing.com>
[rth: Merge cpu feature addition from another patch.]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'docs/system')
| -rw-r--r-- | docs/system/arm/cpu-features.rst | 21 | ||||
| -rw-r--r-- | docs/system/arm/emulation.rst | 3 |
2 files changed, 16 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 ================== diff --git a/docs/system/arm/emulation.rst b/docs/system/arm/emulation.rst index 2e6a7c8961..c4bc407486 100644 --- a/docs/system/arm/emulation.rst +++ b/docs/system/arm/emulation.rst @@ -57,6 +57,9 @@ the following architecture extensions: - FEAT_MTE (Memory Tagging Extension) - FEAT_MTE2 (Memory Tagging Extension) - FEAT_MTE3 (MTE Asymmetric Fault Handling) +- FEAT_PACIMP (Pointer authentication - IMPLEMENTATION DEFINED algorithm) +- FEAT_PACQARMA3 (Pointer authentication - QARMA3 algorithm) +- FEAT_PACQARMA5 (Pointer authentication - QARMA5 algorithm) - FEAT_PAN (Privileged access never) - FEAT_PAN2 (AT S1E1R and AT S1E1W instruction variants affected by PSTATE.PAN) - FEAT_PAN3 (Support for SCTLR_ELx.EPAN) |