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PTW: Non-leaf PTEs with D/A/U==1 are reserved #2905

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merged 1 commit into from
Nov 30, 2021
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ingallsj
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Related issue: resolves #2895

Type of change: bug report

Impact: API addition (no impact on existing code)

Development Phase: implementation

Release Notes
Page fault on "table" entry (RWX=0) with D/A/U bit set.
Well-behaved software should have no problem.
Software that was setting these reserved bits will start getting unexpected page faults.

@ingallsj ingallsj requested a review from aswaterman November 13, 2021 02:06
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Thanks!

@ingallsj ingallsj merged commit 303564b into master Nov 30, 2021
@ingallsj ingallsj deleted the ptw_reserve_table_dau branch November 30, 2021 15:17
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Instruction page fault when D/A/U bits set in a non-leaf PTE
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