kernel: bump gitlink for i8042 verdict + TSC fixes (task 8)

2026-08-05 12:34:45 +03:00
parent b51aa9503f
commit 384e221216
2 changed files with 95 additions and 1 deletions
@@ -0,0 +1,94 @@
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.00s
+     Running unittests src/lib.rs (local/sources/kernel/host-tests/i8042-verdict/target/debug/deps/i8042_verdict_test-616736c5ad6fa945)
+
+running 14 tests
+test fadt_all_possible_boot_arch_absent_patterns ... ok
+test fadt_flag_clear_ambiguous_probe_fail ... ok
+test fadt_flag_clear_absent_even_with_other_bits_zero ... ok
+test fadt_flag_clear_ambiguous_probe_pass ... ok
+test fadt_flag_clear_ambiguous_probe_timeout ... ok
+test fadt_flag_on_both_bit1_and_bit0_present ... ok
+test fadt_flag_set_bit1_ignores_probe ... ok
+test fadt_flag_set_i8042_present ... ok
+test fadt_flag_set_other_bit_i8042_absent ... ok
+test fadt_no_bits_set_probe_determines ... ok
+test ps2d_decision_is_deterministic ... ok
+test ps2d_verdict_absent_exit_0 ... ok
+test ps2d_verdict_present_full_startup ... ok
+test ps2d_verdict_unavailable_exit_0_safe_default ... ok
+
+test result: ok. 14 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+   Doc-tests i8042_verdict_test
+
+running 0 tests
+
+test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+
+---
+## QA Fixture Design
+
+### Verdict matrix host tests (GREEN — 14/14)
+All combinations of FADT BOOT_ARCH flags × active probe result are covered.
+The verdict function mirror at `host-tests/i8042-verdict/src/lib.rs:30` matches
+the kernel logic in `src/acpi/i8042.rs:74-97` line-for-line.
+
+### QEMU regression (orchestrator runs after commit):
+1. **i8042 present (QEMU default):** QEMU exposes a PS/2 controller.
+   - Build `redbear-mini` → boot → `ps2d` reads `/scheme/serio/present` → "1" → full startup.
+   - Keyboard input works via `serio:0`.
+   - No spurious exit-0 lines.
+
+2. **i8042 absent (QA-only fixture — not shipped):** Kernel built with
+   `IA_PC_BOOT_ARCH` cleared in the FADT fixture + `redbear-mini` built against
+   that kernel.
+   - Boot → kernel does NOT wire IRQ1/12.
+   - `ps2d` reads `/scheme/serio/present` → "0" → logs ONE info line
+     "no PS/2 controller present; USB HID is the input path" and exits 0.
+   - Init continues to login on USB HID (usbhidd).
+   - Zero spurious serio input events.
+
+3. **False-positive prevention (QA scenario):** Floating legacy I/O ports
+   (no hardware), FADT flag clear → verdict absent. Even if a spurious probe
+   returned transient data, the FADT flag takes precedence when present.
+
+### Test harness
+Single command (no build needed):
+  cargo test --manifest-path local/sources/kernel/host-tests/i8042-verdict/Cargo.toml
+
+---
+## Files Changed
+
+### Kernel fork (`local/sources/kernel/`, submodule/kernel):
+- `src/acpi/fadt.rs` — ADD: IA_PC_BOOT_ARCH static + parsing (offset 109,
+  bit 1 = I8042), accessor `ia_pc_boot_arch()`, FADT_MIN_SIZE_ACPI_5_0
+- `src/acpi/i8042.rs` — NEW: i8042 presence verdict logic (FADT flag +
+  bounded active probe at ports 0x60/0x64), AtomicBool static `I8042_PRESENT`,
+  public `i8042_present()` + `init_i8042_verdict()`
+- `src/acpi/mod.rs` — ADD: `pub mod i8042`, call `fadt::init()` + 
+  `i8042::init_i8042_verdict()` in `init_after_mem`
+- `src/scheme/serio.rs` — ADD: `HandleKind::Present`, path "present" in
+  `kopenat`, `kread` returns "1\n"/"0\n", `kfpath` returns "serio:present"
+- `src/arch/x86_shared/interrupt/irq.rs` — MODIFY: `keyboard` (IRQ1) and
+  `mouse` (IRQ12) handlers check `i8042_present()` — EOI only when absent
+
+### Base fork (`local/sources/base/`, submodule/base):
+- `drivers/input/ps2d/src/main.rs` — ADD: presence check via
+  `/scheme/serio/present` before opening serio devices; if absent, log ONE
+  info line and `process::exit(0)`
+
+### Host tests:
+- `host-tests/i8042-verdict/Cargo.toml` — NEW standalone test crate
+- `host-tests/i8042-verdict/src/lib.rs` — NEW: 14 tests (10 verdict matrix
+  + 4 ps2d decision table)
+
+### NOT CHANGED (per MUST NOT DO):
+- No config TOML modified (ps2d stays in all redbear-* configs)
+- No BINS entries removed
+- No init service files changed
+- No usbhidd gated on ps2d
+- No unwrap()/expect() in kernel code
+- No `src/scheme/irq.rs` cpu- path handling touched
+- No retries/warning noise on absence
+- No recipe files modified