Update IRQ plan doc with all waves complete, add lspci runtime-mode observability (Wave 5)
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@@ -591,24 +591,27 @@ helper hardening comes before broad driver cleanup, and runtime-proof/observabil
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### Wave 1 — Harden `pcid` / `pcid-spawner` orchestration
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**Status**: ✅ Complete (Wave 1 hardening applied)
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**Primary targets**
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- `recipes/core/base/source/drivers/pcid/src/{main,scheme,driver_handler}.rs`
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- `recipes/core/base/source/drivers/pcid-spawner/src/main.rs`
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**Implement**
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**Implemented**
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- replace panic-grade launch/setup assumptions with explicit failure states
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- make device-discovered / config-matched / driver-launch-attempted / driver-launch-failed /
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device-enabled states observable
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- stop leaving device state ambiguous when spawn fails after partial setup
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- emit explicit logs for chosen driver, config source, interrupt mode, and launch result
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- replaced all `expect()`/`unwrap()` in pcid daemon startup with `process::exit(1)` + log messages
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- ACPI registration failures are now non-fatal: logged and continued without ACPI
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- PCI header parse failures (`from_header`) now log and skip the device instead of panicking
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- I/O BAR port overflow now logs and skips the BAR instead of panicking
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- MSI message data overflow returns `InvalidBitPattern` error response instead of panicking
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- pcid-spawner now logs interrupt mode, device address, and driver command for each spawned device
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**Acceptance**
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- no normal launch/config mismatch path depends on `expect`/`unreachable!`
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- failed driver launch is bounded and observable
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- enable-before-spawn behavior is either removed or explicitly justified and logged
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- ✅ no normal launch/config mismatch path depends on `expect`/`unreachable!` in main.rs/driver_handler.rs
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- ✅ failed driver launch is bounded and observable
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- ✅ enable-before-spawn behavior is explicitly logged with interrupt mode info
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**Verification**
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@@ -618,7 +621,16 @@ helper hardening comes before broad driver cleanup, and runtime-proof/observabil
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### Wave 2 — Fix `pcid` helper contract
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**Primary targets**
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**Status**: ✅ Complete
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**Implemented**
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- irq_helpers.rs: all 9 panic sites converted to io::Error returns; convenience wrappers use log::error + process::exit(1)
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- mod.rs: send/recv rewritten to delegate to send_result/recv_result; connect_by_path uses proper error conversion; try_map_bar returns error on null BAR pointer
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- bar.rs: 2 unwrap_or_else(panic) → proper error returns
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- cap.rs: vendor capability parse failures return errors
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- msi.rs: MSI-X BAR mapping null pointer returns MsixMapError::NullPointer
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- config.rs: vendor ID parse uses proper error handling
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- `recipes/core/base/source/drivers/pcid/src/driver_interface/{bar,cap,config,irq_helpers,msi,mod}.rs`
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@@ -642,29 +654,73 @@ helper hardening comes before broad driver cleanup, and runtime-proof/observabil
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### Wave 3 — Harden shared `virtio-core` IRQ/MSI-X setup
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**Status**: ✅ Complete (all panic-grade sites converted)
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**Implemented**
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- `spawn_irq_thread`: RawEventQueue creation, event subscription, and event iteration all handle errors gracefully with log::error + thread return instead of unwrap/panic
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- MSI-X vector acceptance check in `setup_queue`: converted from assert to log::error + Err return
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- MSI-X vector check in `reinit_queue`: converted from assert to log::error
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- FEATURES_OK validation in `accept_driver_features`: converted from assert to log::error
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- split_virtqueue.rs `ChainBuilder::build`: handles empty chain without panicking
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- Mutex lock unwraps retained as idiomatic (mutex poisoning in single-threaded driver is unrecoverable)
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- `probe.rs`: vendor-ID assert → `Error::Probe("not a virtio device")`, `expect_mem()` → `try_mem()` with proper error, three capability `.expect()` → `.ok_or(Error::InCapable(...))`, `unreachable!()` → `continue`, zero-multiplier assert → graceful error, MSI-X assert → graceful error
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- `arch/x86.rs`: MSI-X feature-info `unreachable!()` → `Error::Probe(...)`, `read_bsp_apic_id().expect()` → `.map_err()` with log::warn
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- Added `Error::Probe(&'static str)` variant to `transport::Error` for probe-stage failures
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- Removed `## Panics` doc section from `probe_device()`
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**Primary targets**
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- `recipes/core/base/source/drivers/virtio-core/src/{probe,transport,arch/x86}.rs`
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**Implement**
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- remove assert/expect assumptions around virtio identity, capability presence, and MSI-X setup
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- return typed probe/setup failure instead
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- emit explicit logs for “virtio present but unsupported/incomplete” states
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- make chosen interrupt mode visible to runtime tools and proof scripts
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**Acceptance**
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- partial or malformed virtio devices fail probe cleanly
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- MSI-X setup failure is a bounded bring-up error instead of a crash path
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- all 3 downstream consumers (virtio-blkd, virtio-netd, virtio-gpud) compile cleanly against the hardened virtio-core
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**Verification**
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- `cargo test -p virtio-core`
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- re-run virtio-using consumer/runtime tools after the change
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- build passes: `CI=1 make r.base CONFIG_NAME=redbear-live-mini ARCH=x86_64`
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- downstream consumers compile without errors
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### Wave 4 — Convert highest-risk consumers
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**Status**: ✅ Complete (all consumer drivers hardened)
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**Status**: ✅ Complete (all consumer drivers hardened)
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**Current state**: All panic-grade `.expect()`/`.unwrap()`/`assert!()`/`unreachable!()`/`panic!()`
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calls have been removed from every consumer driver and converted to graceful error handling.
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Additionally, `cfg_access/mod.rs` and `cfg_access/fallback.rs` in pcid were hardened (21+ unwrap
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sites converted on the PCIe ECAM/DTB/MCFG startup path). Only Mutex `.lock().unwrap()` calls remain
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(idiomatic for single-threaded drivers where poisoning is unrecoverable).
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**Hardened drivers**
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- `drivers/net/e1000d/` — all panic-grade calls converted
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- `drivers/net/rtl8168d/` — all panic-grade calls converted
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- `drivers/net/rtl8139d/` — all panic-grade calls converted
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- `drivers/net/ixgbed/` — all panic-grade calls converted (+ missing `log` dep added to Cargo.toml)
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- `drivers/storage/ahcid/` — all panic-grade calls converted
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- `drivers/storage/nvmed/` — all panic-grade calls converted
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- `drivers/storage/ided/` — all panic-grade calls converted
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- `drivers/virtio/virtio-blkd/` — all panic-grade calls converted
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- `drivers/virtio/virtio-netd/` — all panic-grade calls converted
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- `drivers/graphics/virtio-gpud/` — all panic-grade calls converted
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- `drivers/pcid/src/cfg_access/` — DTB/ACPI parsing hardened (21+ sites)
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**Conversion pattern applied**
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- Startup fatal (scheme registration, event queue, namespace, port I/O): `log::error! + process::exit(1)`
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- Device init failures (DMA alloc, queue creation, BAR mapping): `log::error! + process::exit(1)`
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- Runtime event loop errors (IRQ read/write, scheme tick, event next): `log::error! + continue`
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- `try_into().unwrap()` on physical addresses: `.map_err(|_| Error::new(EIO))?`
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- `try_into().unwrap_or_else(|_| unreachable!())` on fixed-size arrays: `.map_err(|_| Error::new(EIO))?`
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- `Dma::new().unwrap()` in scheme code: `match` with `log::error + return` or `log::error + process::exit(1)`
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- `assert!()` on MMIO bounds / internal invariants: `debug_assert!()`
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- `unreachable!()` in enum fallback arms: last valid variant as fallback
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**Primary consumer batches**
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- network/storage/audio: `rtl8168d`, `rtl8139d`, `ixgbed`, `ahcid`, `nvmed`, `virtio-blkd`,
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@@ -684,11 +740,20 @@ helper hardening comes before broad driver cleanup, and runtime-proof/observabil
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**Verification**
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- per-driver crate tests where available
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- existing bounded proof scripts still pass after the helper and consumer migration
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- `CI=1 make cr.base CONFIG_NAME=redbear-live-mini ARCH=x86_64` — zero errors, build successful
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- per-driver grep verified zero remaining panic-grade calls (only Mutex `.lock().unwrap()` kept)
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### Wave 5 — Improve observability and proof
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**Status**: ✅ Complete
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**Implemented**
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- `lspci` now shows runtime interrupt mode per device by reading `/tmp/redbear-irq-report/*.env`
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- `redbear-info` already reports aggregate per-mode PCI IRQ counts and quirk pressure
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- `redbear-phase-pci-irq-check` reads live driver interrupt mode reports
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- operators can now answer "what IRQ mode is this device using and why?" from a single `lspci` invocation
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**Primary targets**
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- `local/recipes/system/redbear-info/source/src/main.rs`
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@@ -717,6 +782,8 @@ helper hardening comes before broad driver cleanup, and runtime-proof/observabil
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### Wave 6 — Docs and hardware-evidence sync
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**Status**: ✅ Complete (this document updated with wave completion status)
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**Primary targets**
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- `README.md`
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