feat: HWP scaling, C1E, closed-loop thermal governor for Intel CPUs

kernel/src/ACPI/AcpiSleep.cpp

@@ -19,6 +19,7 @@
 #include <Hal/Apic/IoApic.hpp>
 #include <Hal/Apic/Pic.hpp>
 #include <Timekeeping/ApicTimer.hpp>
+#include <Hal/CpuPower.hpp>
 #include <Drivers/Graphics/IntelGPU.hpp>
 #include <Drivers/PS2/PS2Controller.hpp>
 #include <Graphics/Framebuffer.hpp>
@@ -435,6 +436,9 @@ namespace Hal {
             }
             reinitProgress(0x04);  // PAT
             Hal::InitializePAT();
+            // HWP enable and POWER_CTL reset across S3; re-apply them and
+            // bump the policy epoch so APs re-apply on their next tick.
+            Hal::CpuPower::ReapplyAfterWake();
             reinitProgress(0x05);  // PIC
             Hal::DisableLegacyPic();
             reinitProgress(0x06);  // Local APIC