Kernel has a use-after-free bug in sys_read triggered by /scheme/sys/msr
access. The probe guard prevents most crashes but the kernel bug can still
trigger during MSR read paths. Removing the MSR fallback eliminates this
crash path entirely. Vendor detection now uses /scheme/sys/cpu only.
cpufreqd:
- Read CPU vendor and frequency from /scheme/sys/cpu (CPUID-based)
- Generate P-states dynamically from detected max/base frequency
- Remove hardcoded 2400-1200 kHz fallback table
- Intel SpeedStep and AMD encoding support
coretempd:
- Detect vendor from /scheme/sys/cpu before MSR probing
- Read CPU count from /scheme/sys/cpu for accuracy
- Fall back to MSR detection only when platform info unavailable
On QEMU's default i440FX machine type, rdmsr on unsupported MSRs
(0x19c IA32_THERM_STATUS, 0x1a2 IA32_TEMPERATURE_TARGET) causes a
kernel #GP that kills the process. Same pattern as cpufreqd: spawn a
child with --probe-msr to test readability before the main loop. If
probe fails, disable all MSR reads and report all CPUs as Unknown.
- 29_activate_console.service: oneshot -> oneshot_async (unblocks init
scheduler, enabling getty 2 -> login)
- 15_coretempd.service: oneshot_async -> {scheme="coretemp"} (init
now correctly registers the scheme fd)
- cpufreqd: child-process MSR probe detects QEMU's lack of MSR 0x199
and gracefully degrades to monitoring-only mode
- coretempd: notification failure is now non-fatal (WARN instead of ?)
- driver-manager: "no match entries" downgraded from warn to debug
(infrastructure daemons intentionally have no hw match)
Detect CPU vendor by probing MSRs (Intel IA32_THERM_STATUS vs AMD
TCTL MSR C0010293). Support both Intel Tjmax-based and AMD direct
temperature reading. Log detected vendor per CPU at startup.
New local recipe coretempd reads IA32_THERM_STATUS MSR via the
new sys:msr scheme and exposes per-CPU temperatures via scheme:coretemp.
- Reads IA32_THERM_STATUS (0x19C) and IA32_TEMPERATURE_TARGET (0x1A2)
- Calculates Celsius from digital readout relative to TjMax
- Exposes /scheme/coretemp/ directory with per-CPU temperature files
- Added to redbear-mini.toml (inherited by redbear-full)
- Added 15_coretempd.service init file
vasilito