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aarch64: virtio-keyboard-pci, interrupt-driven keyboard input (item 4.3.5e)

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Punch list §25 item 4.3.5e complete.

Extended virtio_input.c with a GIC-routed interrupt path alongside 4.3.5c's
PLIC one -- same capability walk, feature negotiation, eventq handling
(confirming §27.5.1's prediction that these items would share most of the
driver). aarch64_irq_handler() dispatches to virtio_input_isr() before its
EOIR write, same claim-dispatch-complete ordering riscv64 uses. Verified
with a real QEMU sendkey keypress: exact KEY_A/press match, two real
interrupts serviced, identical result to riscv64. Found (not fixed) an
unrelated pre-existing bug: BYE's cold-reset path faults on aarch64,
discovered incidentally since nobody had exercised it from a monitored
session before. Three-arch acceptance boot clean.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
Robert Allan James
2026-08-08 12:29:27 -04:00
co-authored by Claude Sonnet 5
parent 2a2d7c5e5e
commit a373c9124a
18 changed files with 72523 additions and 78 deletions
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experiments/bare_metal/latest/amd64.csv
+23 -23
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@@ -59,37 +59,37 @@ tick_number,elapsed_ns,tick_interval_ns,cache_hits_delta,bucket_hits_delta,word_
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