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target/arm: Implement FEAT_HAFDBS, access flag portion

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Perform the atomic update for hardware management of the access flag.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20221024051851.3074715-13-richard.henderson@linaro.org
[PMM: Fix accidental PROT_WRITE to PAGE_WRITE; add missing
 main-loop.h include]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Richard Henderson 2022-10-24 15:18:49 +10:00 • committed by Peter Maydell
parent 34a57faeab
commit 71943a1e90
3 changed files with 157 additions and 22 deletions
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docs/system/arm/emulation.rst
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@ -33,6 +33,7 @@ the following architecture extensions:
- FEAT_FlagM (Flag manipulation instructions v2)
- FEAT_FlagM2 (Enhancements to flag manipulation instructions)
- FEAT_GTG (Guest translation granule size)
- FEAT_HAFDBS (Hardware management of the access flag and dirty bit state)
- FEAT_HCX (Support for the HCRX_EL2 register)
- FEAT_HPDS (Hierarchical permission disables)
- FEAT_I8MM (AArch64 Int8 matrix multiplication instructions)