Data cache zeroing is used even when it is prohibited

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    • Type: Bug
    • Resolution: Unresolved
    • Priority: P2
    • None
    • Affects Version/s: 11, 17, 21, 25
    • Component/s: hotspot
    • None
    • aarch64
    • generic

      The DC ZVA instruction should not be used when DZP, bit [4] in DCZID_EL0, is set.

      It turns out that detection of DZP, bit [4] in DCZID_EL0, never worked. And this was never a problem until now, because everyone supports DC ZVA instructions.

            Assignee:
            Andrew Haley
            Reporter:
            Andrew Haley
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              Created:
              Updated: