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target/arm: Implement MTE3

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MTE3 introduces an asymmetric tag checking mode, in which loads are
checked synchronously and stores are checked asynchronously. Add
support for it.

Signed-off-by: Peter Collingbourne <pcc@google.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210616195614.11785-1-pcc@google.com
[PMM: Add line to emulation.rst]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Collingbourne 2021-06-16 12:56:14 -07:00 • committed by Peter Maydell
parent 4f57ef959c
commit 86f0d4c729
3 changed files with 53 additions and 32 deletions
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docs/system/arm/emulation.rst
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@ -29,6 +29,7 @@ the following architecture extensions:
- FEAT_LSE (Large System Extensions)
- FEAT_MTE (Memory Tagging Extension)
- FEAT_MTE2 (Memory Tagging Extension)
- FEAT_MTE3 (MTE Asymmetric Fault Handling)
- FEAT_PAN (Privileged access never)
- FEAT_PAN2 (AT S1E1R and AT S1E1W instruction variants affected by PSTATE.PAN)
- FEAT_PAuth (Pointer authentication)