cpu: add HPDS, LOR, PAN detection for arm64 This CL gets ID_AA64MMFR1_EL1, Memory Model Feature Register 1, and grabs HPDS, LOR, PAN features from its bits. Fixes golang/go#75472. Change-Id: Ic04b109d79aceba9b3b1d3a1ea514fcf132007c5 GitHub-Last-Rev: f938ff468bca49cc7863aa26e7a880eec2823bb4 GitHub-Pull-Request: golang/sys#263 Reviewed-on: https://go-review.googlesource.com/c/sys/+/704075 Reviewed-by: Keith Randall <khr@google.com> Auto-Submit: Keith Randall <khr@golang.org> Reviewed-by: Michael Knyszek <mknyszek@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Keith Randall <khr@golang.org>
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