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x/sys/cpu: add flags for Arm64 HPDS, LOR, PAN #75472

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golang/sys
#263
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x/sys/cpu: add flags for Arm64 HPDS, LOR, PAN#75472
golang/sys
#263
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FeatureRequestIssues asking for a new feature that does not need a proposal.LibraryProposalIssues describing a requested change to the Go standard library or x/ libraries, but not to a toolNeedsFixThe path to resolution is known, but the work has not been done.arch-arm64help wanted
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@harryzcy

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@harryzcy
harryzcy
opened on Sep 15, 2025

Proposal Details

When using the ARM64 struct from x/sys/cpu, there's no field for FEAT_HPDS, FEAT_LOR, FEAT_PAN available for ARMv8.1

Those information are obtained from ID_AA64MMFR1_EL1 register, which we need to get in assembly code

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    FeatureRequestIssues asking for a new feature that does not need a proposal.LibraryProposalIssues describing a requested change to the Go standard library or x/ libraries, but not to a toolNeedsFixThe path to resolution is known, but the work has not been done.arch-arm64help wanted

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