How kimsultech/android_kernel_xiaomi_msm8953-4.9 works
Linux 4.x is a general-purpose operating-system kernel, not a single application. Its broad user-to-result workflow is applications making system requests that the kernel serves using architecture-specific and subsystem code, with hardware drivers mediating device operations. The sampled files show several distinct branches—graphics, crypto acceleration, USB, audio, storage, and power—but not a complete end-to-end request path. The README establishes the kernel’s broad capabilities; dashed edges mark workflows or subsystem relations not directly evidenced by the excerpts.
Main entry points: main.c Kernel entry · ccp-dmaengine.c CCP DMA · adf_accel_engine.c QAT accelerator · intel_engine_cs.c i915 engines
Components 16
Kernel runtime
- Kernel entry
init/main.c
Architecture and devices
- Alpha setup
arch/alpha/kernel/setup.c - ARM setup
arch/arm/kernel/devtree.c - DMA engine
drivers/dma/dmaengine.c
Compute and media
- Crypto engine
crypto/crypto_engine.c - CCP DMA
drivers/crypto/ccp/ccp-dmaengine.c - QAT accelerator
drivers/crypto/qat/qat_common/adf_accel_engine.c - i915 engines
drivers/gpu/drm/i915/intel_engine_cs.c - Audio DSP pipeline
drivers/isdn/mISDN/dsp_pipeline.c
Storage and connectivity
- USB mass storage
drivers/usb/gadget/function/f_mass_storage.c - USB PD policy
drivers/usb/pd/policy_engine.c - RomFS storage
fs/romfs/storage.c - Networking
net/mac80211/main.c
Platform services
- Power management
kernel/power/main.c - Charger manager
drivers/power/supply/charger-manager.c
Other components
- Applications
Connections 10
- Applications → Kernel entry: requests services
README - Kernel entry → Alpha setup: initializes platform
- Kernel entry → ARM setup: initializes platform
- CCP DMA → DMA engine: uses DMA API
drivers/crypto/ccp/ccp-dmaengine.c - QAT accelerator → Crypto engine: accelerates crypto
- i915 engines → Applications: serves graphics
- USB mass storage → Applications: serves storage
- RomFS storage → Applications: provides files
- Networking → Applications: provides networking
- USB PD policy → Charger manager: coordinates power