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arm64: Expose DC CVAP to userspace

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The ARMv8.2-DCPoP feature introduces persistent memory support to the
architecture, by defining a point of persistence in the memory
hierarchy, and a corresponding cache maintenance operation, DC CVAP.
Expose the support via HWCAP and MRS emulation.

Reviewed-by: Will Deacon <[email protected]>
Signed-off-by: Robin Murphy <[email protected]>
Signed-off-by: Catalin Marinas <[email protected]>
This commit is contained in:
Robin Murphy 2017-07-25 11:55:40 +01:00 • committed by Catalin Marinas
commit 7aac405ebb
5 changed files with 7 additions and 0 deletions
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Documentation/arm64/cpu-feature-registers.txt
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@ -179,6 +179,8 @@ infrastructure:
| FCMA | [19-16] | y |
|--------------------------------------------------|
| JSCVT | [15-12] | y |
|--------------------------------------------------|
| DPB | [3-0] | y |
x--------------------------------------------------x
Appendix I: Example