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Merge feat/power-events: ACPI events + system power (M21)

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The QMP harness channel, the SCI + power button published from ring 3,
Notify/GPE dispatch in the AML interpreter, and orderly shutdown — init's
M17 stop cascade into a ring-3 S5 write. Proven by injecting a real ACPI
power-button event; QEMU powers off through the whole chain.

# Conflicts:
#	system/services/init/init.zig
This commit is contained in:
Daniel Samson
2026-07-13 06:27:18 +01:00
parent 6e60daed6a 446f655c69
commit dd22bfbc48
13 changed files with 713 additions and 94 deletions
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system/kernel/tests.zig
+25
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@@ -152,6 +152,10 @@ pub fn run(case: []const u8, boot_information: *const BootInformation) void {
acpiReportTest(boot_information);
} else if (eql(case, "acpi-ps2")) {
acpiReportTest(boot_information); // same spawn; the harness regex differs
} else if (eql(case, "power-button")) {
acpiReportTest(boot_information); // boot the manager (spawns the acpi service); harness injects the button
} else if (eql(case, "orderly-shutdown")) {
orderlyShutdownTest(boot_information);
} else if (eql(case, "initial-ramdisk")) {
initialRamdiskTest(boot_information);
} else if (eql(case, "vfs")) {
@@ -1929,6 +1933,27 @@ fn pciScanTest(boot_information: *const BootInformation) void {
result();
}
/// M21.3 capstone: orderly shutdown. Boot init with the initial-ramdisk
/// published, so init spawns the full service tree (vfs, input, device-manager
/// -> discovery/acpi); the harness injects a real power-button event via QMP;
/// the acpi service publishes it; init runs the stop sequence over its children
/// and asks the power service for S5; the machine powers off (QEMU exits). The
/// kernel test only spawns init — the ordered chain is the harness assertion.
fn orderlyShutdownTest(boot_information: *const BootInformation) void {
log("DANOS-TEST-BEGIN: orderly-shutdown\n", .{});
if (boot_information.init_len == 0 or boot_information.initial_ramdisk_len == 0) {
check("bootloader handed over init and the initial_ramdisk", false);
result();
return;
}
const ramdisk = @as([*]const u8, @ptrFromInt(boot_handoff.physicalToVirtual(boot_information.initial_ramdisk_base)))[0..boot_information.initial_ramdisk_len];
process.setInitialRamdisk(ramdisk);
const image = @as([*]const u8, @ptrFromInt(boot_handoff.physicalToVirtual(boot_information.init_base)))[0..boot_information.init_len];
const spawned = if (process.spawnProcess(image, 4, &.{"/system/services/init"})) true else |_| false;
check("init spawned as PID root of user space", spawned);
result();
}
/// M20.2: the acpi service registers + reports its _HID devices. Boot normally
/// (the manager spawns discovery); the harness's expect regex requires the two
/// PS/2 nodes among the service's report lines, each with its _CRS resources —