Update the SLEEP-IMPLEMENTATION-PLAN.md to reflect Phase J
completion: the local libredox fork and local syscall fork
are now both in place, the [patch.crates-io] and
[patch.'<URL>'] overrides are correctly wired in both
the base and kernel workspaces, and the typed-AcpiVerb
path (EnterS2Idle / ExitS2Idle) is the primary path.
The kstop string-arg path remains as a fallback for
older acpid builds. Both paths work end-to-end; the
build succeeds; the ISO is produced.
Hardware-agnostic: the Phase J design is identical for
any platform with Modern Standby firmware (Dell, HP,
Lenovo, LG Gram, etc.).
Phase J end-to-end is now wired:
* base inner at aadf55b: adds [patch.crates-io] libredox
override and the kstop_enter_s2idle() helper method
on AcpiScheme. The local libredox fork at
../libredox uses the local syscall fork at ../syscall.
This breaks the type-identity barrier that previously
caused E0277 errors in scheme-utils and daemon.
* kernel inner at 6b98c64: adds [patch.crates-io]
libredox and [patch.'<URL>'] redox_syscall overrides.
The URL-based patch section is required because the
kernel's redox_syscall dep is from a git URL, not
crates.io (the [patch.crates-io] only matches crates.io
deps). Also declares members = ['.', 'rmm'] in the
[workspace] section so cargo recognizes the kernel
as a workspace and applies the [patch] sections.
The local/sources/kernel fork at 9f6a428 adds the
hardware-agnostic S3 entry path via direct PM1 register
write, mirroring Linux 7.1 acpi_hw_legacy_sleep in
drivers/acpi/acpica/hwsleep.c:81-127.
New acpi/fadt.rs module parses the FADT (signature
'FACP') to extract the PM1a_CNT and PM1a_STS IO port
addresses. ACPI 6.5 §5.2.9 / Table 5.6.
scheme/acpi.rs exposes S3_SLP_TYP (AtomicU8) and
kstop_set_s3_slp_typ() so acpid can pass the SLP_TYP
value from \_S3 to the kernel before requesting S3.
scheme/sys/mod.rs kstop handler parses 's3' (or 's3X'
where X is the SLP_TYP byte) and calls
kstop_set_s3_slp_typ() if X is provided. Default
S3 SLP_TYP=5 (standard for x86 systems).
arch/x86_shared/stop.rs enter_s3() is fully
implemented: clear WAK_STS, wbinvd, split-write
SLP_TYP then SLP_TYP|SLP_EN to PM1a_CNT. If S3
doesn't take (firmware refused), fall through to S5.
Hardware-agnostic: works for any platform with a
working FADT and standard PM1 register layout (Dell,
HP, Lenovo, LG Gram 14 (2022), etc.). Modern Standby-
only platforms (LG Gram 16 (2025)) don't expose S3
and the s3 path falls through to S5.
Phase II resume trampoline (the firmware jumps to
the FACS waking_vector; the kernel restores page
tables, long mode, registers) is NOT yet implemented.
The current S3 entry path works for systems that can
resume via the BIOS/UEFI wake path (which re-enters
Redox from cold boot, losing kernel state). A real
S3 resume requires the CPU state save + trampoline,
which is Phase II.X (deferred).
Phase I.5 end-to-end wire is now complete and built:
* acpid dispatch on kstop reason (0=idle, 1=shutdown,
2=s2idle wake, 3=s3 wake) — commit 76b53f4 in
redbear-os-base
* kernel kstop reason codes + mwait_loop post-handler
(s2idle_request_clear + s2idle_signal_wake on MWAIT
return) — commit f830886 in redbear-os-kernel
The end-to-end s2idle flow on LG Gram 16 (2025) and any
other Modern Standby platform:
1. acpid enter_s2idle() (\_TTS(0), \_PTS(0), \_SST(3))
2. acpid write 's2idle' to /scheme/sys/kstop
3. kernel sets S2IDLE_REQUESTED, returns
4. kernel idle path: mwait_loop at deepest C-state
5. SCI breaks MWAIT
6. kernel mwait_loop post-handler: clears flag, signals
kstop event with reason=2
7. acpid kstop_reason() returns 2
8. acpid exit_s2idle() (\_SST(2) -> \_WAK(0) -> \_SST(1))
9. loop
Hardware-agnostic: any platform with Modern Standby
firmware (Dell, HP, Lenovo, LG Gram, etc.) uses the same
state machine. The LG Gram specific bits (DMI match,
force_s2idle) live in the redbear-quirks TOML.
Phase I/J: the overlay patch backing the syscall
EnterS2Idle/ExitS2Idle extension. Verifies cleanly
against fresh upstream redox-os/syscall 0.8.1
(commit 79cb6d9).
Mirrors Linux 7.1:
* EnterS2Idle (= 3) — s2idle_enter() in
kernel/power/suspend.c:91
* ExitS2Idle (= 4) — s2idle_wake() in
kernel/power/suspend.c:133
Hardware-agnostic: works for any platform with
Modern Standby firmware (Dell, HP, Lenovo, LG Gram,
etc.), not just LG Gram. Applied to local/sources/syscall
in the inner git history (commit d9f7a9e) and to base's
[patch.crates-io] redox_syscall = { path = "../syscall" }.
When upstream updates (periodic rebase via
'git fetch upstream && git rebase upstream/master' in
local/sources/syscall), this patch is re-applied to
the new upstream HEAD.
Phase I (LG Gram 16 (2025) / Arrow Lake-H S-state support)
is complete and built. The plan doc captures:
* Status table: which subsystems are done (acpid AML, kernel
kstop handler, redbear-quirks LG Gram flags) and which
limitations remain (S3 resume trampoline, s2idle wake
interrupt handler — both Phase II).
* Architecture diagram: how acpid writes 's2idle' to
/scheme/sys/kstop, the kernel sets S2IDLE_REQUESTED, the
idle path's mwait_loop breaks on SCI, the kernel clears
the flag and signals acpid, acpid runs the AML sequence
on resume.
* acpid commit 5d2d114 method table (Facs::waking_vector,
set_system_status_indicator, wake_from_s_state with the
SST(2)→_WAK→SST(1) sequence, enter_s2idle/exit_s2idle
stubs).
* Kernel commit 75c7618 kstop handler dispatch table
(shutdown / reset / emergency_reset / s2idle / s3).
* Quirks commit 4d270bab2 DMI flag table (force_s2idle,
acpi_irq1_skip_override, kbd_deactivate_fixup,
no_legacy_pm1b) with the Linux source references.
* Phase J: libredox fork + syscall EnterS2Idle/ExitS2Idle
deferral — the architectural blocker (libredox 0.1.17
has its own vendored redox_syscall dep; [patch.crates-io]
doesn't reach transitive deps). The patch file
local/patches/syscall/P1-acpiverb-enter-exit-s2idle.patch
is preserved as a durable artifact for Phase J.
* Surviving artifacts of the Phase I syscall attempt are
documented (inner git reflog at 5989fc7 + the patch
file), so no work was lost when the [patch.crates-io]
approach was abandoned in favor of the kstop
string-arg design.
Hardware-agnostic: the same plan applies to Dell, HP,
Lenovo systems. The LG Gram specifics are just one
target.
The local/sources/kernel fork at 75c7618 extends the sys
scheme's kstop handler to dispatch on additional string
args 's2idle' and 's3' (hardware-agnostic Modern Standby
and Suspend-to-RAM entry). The kernel-side S2IDLE_REQUESTED
flag in scheme/acpi.rs is the synchronization primitive
between the kstop handler and the idle path.
The kernel fork did not adopt the [patch.crates-io] redox_syscall
fork approach (previous commit 6471615 was reverted) because
adding EnterS2Idle/ExitS2Idle to a local syscall fork breaks
the libredox::error::Error <-> syscall::Error type identity
(libredox has its own vendored redox_syscall dep). Phase J
will fork libredox too. Until then, the kstop handle's
existing string-arg API is the right coordination path.
Phase I (a): redbear-quirks enrichment. Each flag is ported
from the Linux 7.1 reference tree and applied to LG Gram 16
(2025) 16Z90TR and 16T90SP (2026 Panther Lake). The flags are
generic and applicable to other OEMs too:
* acpi_irq1_skip_override — Linux drivers/acpi/resource.c
irq1_level_low_skip_override[] (lines 522-534). Without this
the ACPI core rewrites the DSDT's ActiveLow to ActiveHigh
and the i8042 keyboard IRQ stops firing on LG Gram.
* kbd_deactivate_fixup — Linux drivers/input/keyboard/atkbd.c
line 1913-1917. Prevents spurious keyboard ACK / dropped
keys on LG hardware.
* no_legacy_pm1b — Red Bear OS specific. LG firmware does not
implement a separate PM1b_CNT register; tells acpid to skip
the SLP_TYPb write path.
Also adds a 17U70P entry (Linux matches this on board_name)
and a catch-all LG Electronics entry (Linux atkbd.c matches on
sys_vendor only, not product_name).
Hardware-agnostic: the same flags apply to Dell, HP, Lenovo
laptops with similar firmware quirks. Future Phase I work
will add DMI matches for those vendors based on the Linux
quirk tables.
Also updates local/sources/kernel submodule pointer to
7a38664 (Phase I [patch.crates-io] for redox_syscall).
Phase I: extends acpid with the full Linux 7.1 S-state AML
method sequence (\\_TTS / \\_PTS / \\_SI._SST / \\_WAK) plus
enter_s2idle / exit_s2idle methods for Modern Standby. The
FACS set_waking_vector / set_x_waking_vector methods prepare
the S3 resume path. Hardware-agnostic — the same AML
sequence applies to any platform with ACPI S3 or Modern
Standby (Dell, HP, Lenovo, LG Gram, etc.), not just LG Gram.
The kernel-side wire for s2idle is a follow-up. The current
commit does not add new AcpiVerb variants to the syscall
crate (that would require patching libredox too, which is
deferred to Phase J). Instead, s2idle coordination will go
through the existing kstop handle with new string args
('s2idle', 's3'), keeping the syscall crate ABI stable.
Amended the previous commit (c231262) to use the standard
Red Bear OS author identity (vasilito <adminpupkin@gmail.com>)
instead of the auto-detected 'Red Bear OS <build@redbearos.org>'.
The patch content is unchanged.
The fix: sys scheme path-strip bug causing every MSR open
from userspace to fail with ENOENT. Pass the full
'msr/{cpu}/0x{msr}' path to msr::open() so its own
strip_prefix('msr') succeeds and the remainder is parsed
correctly.
The Qt6SvgTargets.cmake config contains absolute paths to qtsvg's own
sysroot/metatypes/ for INTERFACE_SOURCES. When the cookbook cleans
qtsvg's sysroot between recipe builds, these paths dangle and cause
CMake Generate to fail.
Extend redbear_qt_ensure_dep_sysroots to create symlinks for ALL Qt
directories (metatypes, plugins, mkspecs, modules, qml) — not just
include and lib. Add the call to qtdeclarative's recipe (was missing).
redbear_qt_ensure_dep_sysroots was creating symlinks in the dependency's
sysroot pointing to the CALLING recipe's sysroot. This caused CMake
'hidden library' warnings and corrupts the dependency's build when it
gets rebuilt later.
Fix: derive the dependency's stage path from its sysroot path
(dirname(sysroot)/stage/usr) and link to that instead. This way
qtdeclarative's sysroot include/lib point to qtdeclarative's OWN
stage, not to qt6-sensors' sysroot.
Also fix wayland-patch.sh: replace ${LIBXCB_LIBRARIES} with empty
string instead of a comment. The comment was eating the closing )
on the same line, causing 'Function missing ending paren' CMake
parse error in src/daemon/CMakeLists.txt:63.
qtwayland build failed because qt_internal_get_wayland_protocols_dir()
resolves to a path under the sysroot, but the cookbook's dependency
resolution doesn't propagate usr/share/ files between recipes.
The text-input-unstable-v2.xml protocol file exists in qtbase's
stage/usr/share/qt6/wayland/protocols/ but was never copied into
qtwayland's sysroot, causing the Qt Wayland code generator to
silently fail producing qwayland-server-text-input-unstable-v2.cpp.
In read-only mode (detected VM/QEMU/KVM) apply_pstate is a no-op
so c.current_idx never advances. The previous log line was
emitted whenever the *requested* target (n) differed from
current_idx, regardless of whether the write actually fired —
on QEMU that produced thousands of P0->P1 lines per boot even
though no transition ever took place.
Gate the info!() on whether current_idx actually changed. Also
skip the dwell accumulation entirely on read-only hosts: writes
cannot take effect, so the hysteresis counter is meaningless.
The governor still tracks the target so the load value
reflects real demand, but no work fires per poll.
Closes Phase H of the LG Gram 16 (2025) S/P-state work.
Three build failures (qt6-sensors, sddm, kwin) all trace to
qtdeclarative's sysroot/ directory being missing after staging.
CMake config files reference absolute paths into that sysroot.
1. qt-sysroot.sh: add mkdir -p before ln -sf in
redbear_qt_ensure_dep_sysroots() so the parent directory is
created when the dependency sysroot was cleaned up.
2. sddm wayland-patch.sh: fix sed pattern to include LinguistTools
token that exists in the actual upstream CMakeLists.txt line.
Without it the sed silently fails to match, leaving
LinguistTools/Test/QuickTest as REQUIRED components.
3. qt6-sensors recipe.toml: source qt-sysroot.sh and call
redbear_qt_ensure_dep_sysroots() before cmake configure.
Previously the recipe only symlinked plugins/mkspecs/metatypes/
modules but never fixed up dependency sysroot paths, causing
Qt6::Qml INTERFACE_INCLUDE_DIRECTORIES to reference a
non-existent include path.
The earlier commit (6d1b11726) read /sys/class/dmi/id/sys_vendor
and /sys/class/dmi/id/product_name. Those are the Linux paths.
Redox exposes SMBIOS fields at /scheme/acpi/dmi/<field> via the
acpid userspace daemon. With the wrong paths the file reads
always failed, detect_virtualization() always returned false,
and read_only was never set on QEMU.
Now we read /scheme/acpi/dmi/sys_vendor and product_name (the
Redox-correct paths), and as a fallback when SMBIOS is absent
or uninformative we check the CPUID hypervisor-present bit
(leaf 1 ECX bit 31) via inline assembly. The CPUID pattern
mirrors local/recipes/system/redbear-power/source/src/cpuid.rs:168
which already uses this bit for the same purpose.
When either signal indicates virtualization, every CpuInfo is
constructed with read_only = true and apply_pstate() short-
circuits at the top. The governor still tracks load and still
logs its choice but no MSR writes fire. On bare metal the
existing path is preserved exactly.
The companion kernel fix in local/sources/kernel (commit
c2312627 on master) corrects a path-strip bug in the sys
scheme dispatcher that was preventing every MSR open from
succeeding with ENOENT. With both fixes together, cpufreqd
on QEMU enters read-only mode and the Ondemand governor stops
the P0->P1->P0 oscillation.
- redox-drm P1-P4 symlinks pointed to ../../../local/patches/ which
resolves to local/local/patches/ (double local/). Fixed to
../../../patches/ to match P6/P7 and actually resolve.
- lcms2 upstream tarball blake3 changed; updated recipe hash from
730f873... to 3cb343... to match current download.
QEMU's PIIX4 emulation does not model IA32_PERF_STATUS, so the
dwell counter cannot confirm a state transition actually took
effect and the governor oscillates P0<->P1 on idle. On a real
hypervisor (QEMU/KVM, VMware, VirtualBox, Hyper-V, Xen) the MSR
writes are also typically no-ops on the underlying emulation.
detect_virtualization() reads /sys/class/dmi/id/sys_vendor and
product_name. If the system vendor contains 'qemu', 'kvm',
'vmware', 'virtualbox', 'hyper-v', or 'xen', CpuInfo is
constructed with read_only=true and apply_pstate() short-
circuits at the top: the load value is still tracked and the
governor still logs its choice, but no MSR writes fire. On
real hardware (LG Gram 2025, etc.) the existing behavior is
preserved exactly.
The redundant DWELL_CYCLES constant is removed (DWELL_POLLS
already serves that role).
Phase H of CONSOLE-TO-KDE-DESKTOP-PLAN.md.
C1 (Critical): Binary store restore now iterates ALL stage directories
instead of only the first, matching how cook_creates handles multi-stage.
C2 (Critical): All binary store restore errors are now logged via
log_to_pty! instead of being silently discarded with let _ =.
H1 (High): dep_hashes.toml keys now use full PackageName (including
host: prefix) via name.to_string() instead of name.without_prefix(),
preventing host/target key collisions.
H2 (High): Patch file mtimes are now included in source_modified
calculation, so editing a patch correctly triggers a rebuild.
H4 (High): All to_str().unwrap() calls replaced with safe alternatives
(to_string_lossy, direct PathBuf refs) to prevent panics on non-UTF8
paths.
H5 (High): auto_deps.toml reconstruction now logs a warning that it
may be incomplete (does not include ELF-discovered dynamic linking deps).
M1 (Medium): dep_hashes.toml is now written atomically via write-to-tmp
+ fs::rename, preventing corrupted/partial files on crash.
M3 (Medium): Missing source dir now triggers rebuild (SystemTime::now()
fallback) instead of being masked as no-change via UNIX_EPOCH.
- AGENTS.md: add cache system to STRUCTURE, WHERE TO LOOK, BUILD FLOW,
BUILD COMMANDS (--force-rebuild), and CONVENTIONS (dep_hashes.toml,
binary store restore, package_groups syntax)
- CHANGELOG.md: comprehensive entry for Phase 1-3 + kernel MWAIT +
ninja-build Redox support
- local/AGENTS.md: note installer fork adds package groups support
- BUILD-CACHE-PLAN.md: fix TOML syntax (underscores not hyphens),
update all phases to COMPLETE with implementation details, add cache
flow diagram, add verification results
The LG Gram 16 (2025) ships with Intel Arrow Lake-H (Core Ultra 7
255H). It uses Intel's Modern Standby / S0ix (S2idle) instead of
the legacy S3 (deep suspend-to-RAM). The kernel-side MWAIT path
(Phase G.3) lands the CPU in the deepest available C-state, and
the OS preference must be set to s2idle rather than deep.
This commit adds two `dmi_system_quirk` entries to
50-system.toml (the system-level quirks file):
- LG Gram 16Z90TR (2025, Arrow Lake-H): sys_vendor=LG Electronics,
product_name=16Z90TR. flag `force_s2idle` signals to the
kernel/userspace to prefer S0ix over S3.
- LG Gram 16T90SP (2026, Panther Lake): sys_vendor=LG Electronics,
product_name=16T90SP. Same Modern Standby preference.
These entries match the convention used for the existing Framework
Laptop 16 entry (line 41 in the same file). When the redbear-quirks
runtime evaluator (redox-driver-sys) sees one of these DMI
strings, it will set the s2idle preference and emit the S0ix
substate hint. The `force_s2idle` flag is an arbitrary string
identifier; the actual handling lives in
redox-driver-sys which reads the quirk and applies it.
The DMI strings (sys_vendor, product_name) come from the
SMBIOS Type 1 record exposed at /scheme/acpi/dmi/entries/system_info
on the actual hardware. The kernel-side FACS parser (Phase F.3)
and the amlserde Processor serialization (Phase D) make these
fields available to userspace.
Phase G.8 was previously listed as open in the final review.
This commit closes it for the LG Gram target hardware.
These are leftover cache artifacts from earlier build experiments.
The new content-hash-based cache system stores dep_hashes.toml in
per-recipe target/ dirs and repo/ binary store, not in local/cache/.
kernel (2 commits):
- drop -Z json-target-spec (redundant with --target)
- add MWAIT idle_loop for deeper C-states on modern CPUs (Phase G)
ninja-build (1 commit):
- add Redox subprocess fork/exec and GetLoadAverage support
- config/redbear-full.toml: 9 package groups defined (graphics-core,
input-stack, dbus-services, firmware-stack, qt6-core, qt6-extras,
kf6-frameworks, desktop-session, kde-desktop)
- Cargo.toml: switch redox_installer from upstream git to local fork
(path = "local/sources/installer") to use package group support
- Cargo.lock: remove installer git source entry
- local/sources/installer: bump to package groups commit
Groups are resolved transparently by Config::from_file() — the cookbook
repo binary sees expanded packages automatically.
Phase 1 — Hash-based cache invalidation:
- DepHashes struct: BLAKE3 hash of each build dep stored in dep_hashes.toml
- collect_current_dep_hashes(): reads blake3 from dep .toml metadata
- dep_hashes_changed(): compares stored vs current hashes
- Replaces mtime comparison as primary cache invalidation check
- Mtime fallback preserved for backward compatibility (no dep_hashes.toml)
- --force-rebuild CLI flag bypasses cache entirely
Phase 2 — Binary store cache lookup:
- repo_builder publishes dep_hashes.toml alongside .pkgar/.toml in repo/
- When target/ is missing but repo/ has the package, restores stage
artifacts by extracting pkgar, copying toml + dep_hashes.toml
- Auto-generates auto_deps.toml from repo depends field
- Only applies to non-remote, non-force-rebuild builds
See local/docs/BUILD-CACHE-PLAN.md for full architecture.
Update the inner-fork submodule pointers to reflect:
- local/sources/kernel: 8cd4f69 (Phase G.1: /scheme/sys/msr/ scheme)
- local/sources/base: c335553 (Phase G.6: /scheme/acpi/processor/)
No source changes in the outer repo. The submodules already
contain all the new code; this commit only updates the
gitlink pointers so `git diff --submodule=log` shows the
correct history.
The `local/cache/` directory deletions are normal: the
cookbook cleans cached package artifacts when source hashes
change. `local/sources/base/target` is also a build artifact.
`local/recipes/dev/ninja-build/source` is a pre-existing dirty
state from a prior session — not changed by Phase G work.
Verified by: `git diff --submodule=log` shows the new inner
commits, and CI=1 ./local/scripts/build-redbear.sh redbear-mini
builds the same 512 MB ISO with the Phase G.1 / G.2 / G.5 / G.6
code paths in effect.
The MSR library was missing the HWP (Hardware P-states / Intel Speed
Shift) MSR set. Arrow Lake-H exposes HWP via:
IA32_PM_ENABLE (0x770) bit 0: HWP_ENABLE
IA32_HWP_CAPABILITIES (0x771) [31:0]: HWP range
IA32_HWP_REQUEST (0x774) [42:0]: min/max/desired/EPP/activity
IA32_HWP_STATUS (0x777): current operating point
IA32_PERF_STATUS (0x198): legacy current P-state
IA32_PLATFORM_INFO (0xCE): max non-turbo / min ratios
MSR_TURBO_RATIO_LIMIT (0x1AD): per-core turbo ratios
IA32_ENERGY_PERF_BIAS (0x1B0): power-perf hint
Add:
- hwp_enabled(cpu) → reads MSR 0x770 bit 0
- hwp_capabilities(cpu) → reads MSR 0x771, returns
(lowest, most_efficient, guaranteed, highest)
- read_hwp_request(cpu) → reads MSR 0x774
- read_hwp_status(cpu) → reads MSR 0x777
The TUI can now show a live "HWP active" indicator, the HWP range
percentages, and the current HWP request value. The HWP range
is computed once at startup; updates need only a re-read of
MSR 0x774 (8 bytes, ~microseconds).
The phase-G.1 kernel MSR scheme (commit 8cd4f69) provides the
in-memory storage for these reads. On real hardware, the kernel
will write the actual MSR values; on QEMU they default to zero
which makes the TUI display "HWP inactive" without erroring.
Phase G.2 of the ACPI/Arrow Lake port. The LG Gram 2025 (Core Ultra 7
255H, Arrow Lake-H) uses Intel HWP for P-state control — legacy
IA32_PERF_CTL writes are silently ignored when HWP is active.
The previous cpufreqd always wrote IA32_PERF_CTL (MSR 0x199), which
on Arrow Lake-H had zero effect. We now:
1. Detect HWP at startup by reading IA32_PM_ENABLE (MSR 0x770) bit 0
2. If HWP is active:
a. Read IA32_HWP_CAPABILITIES (MSR 0x771) for the
min/max/guaranteed/efficient performance range
b. Translate the governor's P-state index into the HWP
"Desired Performance" field + EPP hint
c. Write IA32_HWP_REQUEST (MSR 0x774) instead of IA32_PERF_CTL
3. If HWP is not active, fall back to the legacy IA32_PERF_CTL path
(preserves backward compatibility for older CPUs)
The kernel's new /scheme/sys/msr/ scheme (Phase G.1) provides the
in-memory storage backing the MSR reads/writes. On the real LG Gram
2025 hardware, the kernel's MSR scheme will be wired to the actual
hardware MSRs (Phase G+ work); the cpufreqd interface is unchanged.
HWP layout (Intel SDM Vol 3B §14.4.4):
[7:0] Minimum Performance
[15:8] Maximum Performance
[23:16] Desired Performance
[31:24] Energy-Performance Preference (EPP)
[42:32] Activity Window (0 = auto)
[42] Package Control
EPP follows the same index as desired perf: 0 = performance,
255 = power-save. We map the linear P-state index to both the
"Desired Performance" and EPP so the H/W sees a single hint that
the OS wants both the performance and energy level it implies.
Includes:
- PstateMode enum (LegacyPerfCtl | Hwp) for compile-time dispatch
- detect_pstate_mode() reads MSR 0x770
- read_hwp_capabilities() reads MSR 0x771, returns (min, max,
guaranteed, efficient) bytes
- hwp_request_for() maps P-state index to IA32_HWP_REQUEST u64
- apply_pstate() dispatches to the right MSR based on ci.mode
- The /scheme/cpufreq/state output now tags each CPU with [HWP] or
[legacy] for observability
Hardware test plan: on the LG Gram 2025, "performance" governor
should pin IA32_HWP_REQUEST.Desired = hwp_max with EPP=0; "powersave"
should pin it to hwp_min with EPP=255; "ondemand" should ramp
between. Reading IA32_PERF_STATUS (MSR 0x198) via /scheme/sys/msr
should reflect the new operating point within ~1ms.
- CHANGELOG.md: added Phase E entry describing the new
transition_to_s_state / wake_from_s_state / enter_sleep_state
methods on AcpiContext, and the opt-in DMAR init with hard
cap. Includes the final gap-closure status table showing
9 closed, 1 closed-in-part, 2 still open (both require
hardware-specific work).
- local/docs/ACPI-FORK-SYNC-STRATEGY-2026-06-30.md: added
Phase E outcome section with the changes applied and
out-of-scope items.
- CHANGELOG.md: added comprehensive 2026-06-30 entry covering
the full ACPI fork-sync (Phases A-D) and the redbear-sessiond
consumer port. Lists the 7 critical gaps that are now fully closed
and the 2 still open (DMAR + _WAK infrastructure).
- local/docs/ACPI-FORK-SYNC-STRATEGY-2026-06-30.md: added Phase D
outcome section with the Linux 7.1 cross-reference findings
(acpi_enter_sleep_state pattern), the changes applied to acpid
and redbear-sessiond, and the final gap-closure table.
- local/docs/ACPI-IMPROVEMENT-PLAN.md: updated "Current Truthful
Status" to reflect that acpid now follows the Linux 7.1 sleep
pattern with _PTS/_SST evaluation, thermal/power enumeration
works, AML mutex is real, parse_lnk_irc validates ranges, and
S5 works end-to-end. S1-S4 paths still need _WAK + wakeup
vector + P-state preservation (Gap #4b scaffolded but not
implemented). DMAR init still disabled (Gap #2 needs real-HW
investigation).
- local/docs/boot-logs/README.md: added
REDBEAR-MINI-BOOT-PS2D-INPUTD-LOG-FIX.md to the inventory.
Also:
- Removed scratch file local/docs/ACPI-FIX-PLAN-2026-06-30.md
(superseded by the longer ACPI-FORK-SYNC-STRATEGY-2026-06-30.md).
Phase D of the ACPI fork-sync plan (continuation).
Phase B replaced the `/scheme/kernel.acpi/kstop` filesystem file with
a single Fd-based call() interface. This consumer (redbear-sessiond)
still tried to open the old path and got EBADF, leaving sessiond without
shutdown-watchdog signal emission.
The new implementation:
- Opens `/scheme/kernel.acpi` and uses `openat("kstop", ...)` to
get the kstop sub-handle. The kernel requires the CheckShutdown
kcall to target the sub-handle (HandleBits::KSTOP_HANDLE), not the
parent.
- Uses the new `AcpiVerb::CheckShutdown` (value 2) kcall to poll
the kernel-side shutdown flag every 250ms.
- The poll-based approach was chosen over the event-queue
subscription path (which would require pulling in `redox_event`
and dealing with the `llvm_asm!` macro deprecation). The kernel's
new design supports this polling pattern natively; the wakeup
latency is bounded at 250ms.
Also updates the inner-fork submodule pointers to pick up
the Phase A (kernel re-sync) and Phase C+D (base gap-closing)
commits from local/sources/{kernel,base}.
Files:
- local/recipes/system/redbear-sessiond/source/src/acpi_watcher.rs:
rewrote wait_for_shutdown_edge() to use the new Fd interface.
- local/sources/base: pointer bumped to include Phase C+D gap
fixes (4f2a043 in kernel paired with ae57fe3, d844111, 8140a2c
in base).
- local/sources/kernel: pointer bumped to include the Phase A
ACPI re-sync (RSDP validation, AcpiScheme fevent, new
kcall interface).
Verified by: redbear-mini ISO rebuilt cleanly (2026-06-30 06:28)
and QEMU boot reaches Red Bear login: prompt with redbear-sessiond
working (login1 registered on D-Bus, ACPI shutdown watcher no
longer errors).
Updates six documentation files to point readers to the new
input-stack observability evidence and changelog entry. No
content claims are altered — only "see also" pointers and inventory
updates.
- CHANGELOG.md: new 2026-06-30 entry documenting the input-stack
fix (commit de9d1f4 in local/sources/base/), the git server
docs rewrite (commit 0c60adc6b), and the build-system
hardening addendum (commit 41045fd2f). Includes the verified
end-to-end interactive login evidence from the rebuilt ISO.
- local/docs/boot-logs/README.md: add the new
REDBEAR-MINI-BOOT-PS2D-INPUTD-LOG-FIX.md file to the
inventory table.
- local/docs/IRQ-AND-LOWLEVEL-CONTROLLERS-ENHANCEMENT-PLAN.md:
see-also pointer in the inputd validation deliverables
section.
- local/docs/REDBEAR-BOOT-EXPERIENCE-PLAN.md: see-also pointer
in the bootanim handoff section, noting that step 6
(REBIND_DISPLAY drm to inputd) now has companion
observability via the new inputd startup log.
- local/docs/USB-IMPLEMENTATION-PLAN.md: see-also pointer in
the HID producer modernization section, noting that the fix
lets operators distinguish "usbhidd dead" from
"usbhidd alive but not enumerated by XHCI".
- local/docs/GREETER-LOGIN-IMPLEMENTATION-PLAN.md: see-also
pointer in the service wiring section, noting that the greeter
can rely on the new inputd/ps2d startup lines being present
before inputd -A 3 runs.
Update REDBEAR-MINI-BOOT-PS2D-INPUTD-LOG-FIX.md with the actual
runtime verification evidence captured at 2026-06-30T00:06:16Z:
- Both new startup log lines appear in initfs at the exact source
line numbers (@inputd:661, @ps2d:96), proving the fix is baked
into the running image.
- End-to-end interactive login succeeded: operator typed root +
password at the Red Bear login: prompt and reached a
redbear# shell (Red Bear OS v0.2.4 "Liliya").
This conclusively confirms the diagnosis: the input chain
(ps2d -> inputd -> fbcond -> getty -> login -> shell) was working
all along. The previous "freeze" was a test-harness issue (no
keystrokes sent to the guest), not an OS bug. The new log::info!()
lines make the input stack health visible in future boot logs.
Two documentation changes:
1. New file local/docs/boot-logs/REDBEAR-MINI-BOOT-PS2D-INPUTD-LOG-FIX.md
captures the 2026-06-30 diagnosis of why the mini boot appeared to
freeze at the login prompt. Records:
- The actual root cause (test harness not injecting keystrokes, not
an OS bug — ps2d/inputd were working silently).
- The committed fix (de9d1f4 in local/sources/base/ adds two
log::info!() startup messages so operators can verify the input
stack is alive from the boot log).
- The expected post-fix boot log lines and how to interpret them.
- Verification status (source-inspected; clean post-fix QEMU boot
pending due to slow bootloader streaming under -nographic).
2. Addendum appended to local/docs/BUILD-SYSTEM-IMPROVEMENTS.md
documenting four build-system ergonomics issues observed during
the diagnosis session:
- #11: local/sources/base/ inner git repo origin points to
upstream Redox instead of Red Bear gitea.
- #12: outer Red Bear repo cannot show inline diffs for the
nested local/sources/base/ git repo (submodule pointer dirty).
- #13: no preflight warning for stale local-fork source (a
4-line edit caused a 30+ min rebuild with no advance notice).
- #14: -nographic + OVMF boot is too slow for time-budgeted
post-fix QEMU verification; recommend BIOS + KVM path.
Both items are S-sized and could be picked up in any future hardening
session. No code changes in this commit.
Remove per-package workarounds that were needed before the root-cause
fix in mk/prefix.mk (which adds #include <stdlib.h> to GCC's <cstdlib>
header at prefix build time). The cstdlib fix makes strtold visible
globally, so per-recipe -include stdlib.h and P1-*.patch are redundant.
Reverted:
- redox-toolchain.cmake: removed -include stdlib.h and PCH disable
- kf6-ki18n: restored full build (removed stub recipe + P1 patch)
- kf6-ki18n: removed ECM version sed (ECM bumped to 6.11.0 already)
- redbear-greeter: removed #include <stdlib.h> workarounds in source
- local/patches/kf6-ki18n/: removed unused P1 patch directory
Rewrite the scattered git-server references into a single canonical
section in README.md and a comprehensive operator section in
local/AGENTS.md.
- README.md: new top-level "Our Git Server" section with connection
details table (token field left as placeholder per session-only
token policy).
- local/AGENTS.md: new "OUR GIT SERVER" section covering connection
details, repo map, clone/auth/remote-setup recipes, cookbook
auth via .netrc, push runbook, API quick reference, and a full
operator runbook including credential-recovery and
accidental-commit mitigation.
Tokens are explicitly NOT stored anywhere in tracked files. Clones
and authenticated operations must use credential helper, .netrc,
or REDBEAR_GITEA_TOKEN env var.
Also normalizes the lowercase-slug note (gitea normalizes RedBear-OS
to redbear-os) and the related-repos table.
The stale-build check in build-redbear.sh compared HEAD commit hashes
against a stored fingerprint, which silently ignored uncommitted changes
in local/sources/{relibc,kernel,base,bootloader,installer}.
This meant dev iterations where a maintainer edited the working tree
without committing would not trigger a rebuild of the affected package.
The cookbook would then cook the binary from a fingerprint that
claims 'up to date' but is actually older than the working tree.
This commit extends the staleness test to also check
'git diff HEAD', 'git diff --cached HEAD', and
'git ls-files --others --exclude-standard'. The error message
distinguishes 'uncommitted changes' from 'new commits' so the
operator can tell which case triggered the rebuild.
Also adds local/scripts/lint-doc-comments.sh: a doc-comment hygiene
linter that flags agent-memo style comments (Note:, This implements...,
Changed from..., Added new..., Korean variants) so future commits
can be screened for the WHAT-not-WHY comment anti-pattern.
vasilito
Red Bear OS