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Stage MC-0a: per-core block on one core -- current VM moves behind the per-CPU register (FABRIC-3.10.8 §3.1)

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- New sk_percpu_t { self, core_id, current_vm }, reached via GS base
  (amd64, %gs:0), TPIDR_EL1 (aarch64), tp (riscv64). Boot core's block is
  one static object installed right after arch_early_init(); secondary
  cores' blocks come with MC-1.
- switch.c's global g_switch_current_vm is gone; current VM is
  sk_percpu()->current_vm, re-read after resume in the context switch.
- Probe (removed): normal path and every heartbeat ISR found core 0's
  block on all three ISAs (ISR ok 889/1877/1625, bad 0).
- Standard sequence on amd64/aarch64/riscv64: hashes unchanged from O-C,
  G A=40 B=40, MINT/WIREBIND/USE ok, conservation true, 0 idle growth.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Robert Allan James
2026-09-25 13:56:48 -04:00
co-authored by Claude Opus 5.5
parent 8d33f7a959
commit 8409e376cf
17 changed files with 55013 additions and 8 deletions
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