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target/arm: Enable FEAT_DGH for -cpu max

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This extension concerns not merging memory access, which TCG does
not implement.  Thus we can trivially enable this feature.
Add a comment to handle_hint for the DGH instruction, but no code.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220506180242.216785-23-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2022-05-06 13:02:40 -05:00 • committed by Peter Maydell
parent 3082b86b10
commit 6d9650191a
3 changed files with 3 additions and 0 deletions
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docs/system/arm/emulation.rst
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@ -17,6 +17,7 @@ the following architecture extensions:
- FEAT_CSV2_1p2 (Cache speculation variant 2, version 1.2)
- FEAT_CSV2_2 (Cache speculation variant 2, version 2)
- FEAT_CSV3 (Cache speculation variant 3)
- FEAT_DGH (Data gathering hint)
- FEAT_DIT (Data Independent Timing instructions)
- FEAT_DPB (DC CVAP instruction)
- FEAT_Debugv8p2 (Debug changes for v8.2)