arch/powerpc/include/asm/emulated_ops.h

File Facts

System

Linux kernel

Corpus path

arch/powerpc/include/asm/emulated_ops.h

Extension

.h

Size

2072 bytes

Lines

85

Domain

Architecture Layer

Bucket

arch/powerpc

Inferred role

Architecture Layer: implementation source

Status

source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

• CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/atomic.h
• linux/perf_event.h

Detected Declarations

• struct ppc_emulated_entry

Annotated Snippet

struct ppc_emulated_entry {
	const char *name;
	atomic_t val;
};

extern struct ppc_emulated {
#ifdef CONFIG_ALTIVEC
	struct ppc_emulated_entry altivec;
#endif
	struct ppc_emulated_entry dcba;
	struct ppc_emulated_entry dcbz;
	struct ppc_emulated_entry fp_pair;
	struct ppc_emulated_entry isel;
	struct ppc_emulated_entry mcrxr;
	struct ppc_emulated_entry mfpvr;
	struct ppc_emulated_entry multiple;
	struct ppc_emulated_entry popcntb;
	struct ppc_emulated_entry spe;
	struct ppc_emulated_entry string;
	struct ppc_emulated_entry sync;
	struct ppc_emulated_entry unaligned;
#ifdef CONFIG_MATH_EMULATION
	struct ppc_emulated_entry math;
#endif
#ifdef CONFIG_VSX
	struct ppc_emulated_entry vsx;
#endif
#ifdef CONFIG_PPC64
	struct ppc_emulated_entry mfdscr;
	struct ppc_emulated_entry mtdscr;
	struct ppc_emulated_entry lq_stq;
	struct ppc_emulated_entry lxvw4x;
	struct ppc_emulated_entry lxvh8x;
	struct ppc_emulated_entry lxvd2x;
	struct ppc_emulated_entry lxvb16x;
#endif
} ppc_emulated;

extern u32 ppc_warn_emulated;

extern void ppc_warn_emulated_print(const char *type);

#define __PPC_WARN_EMULATED(type)					 \
	do {								 \
		atomic_inc(&ppc_emulated.type.val);			 \
		if (ppc_warn_emulated)					 \
			ppc_warn_emulated_print(ppc_emulated.type.name); \
	} while (0)

#else /* !CONFIG_PPC_EMULATED_STATS */

#define __PPC_WARN_EMULATED(type)	do { } while (0)

#endif /* !CONFIG_PPC_EMULATED_STATS */

#define PPC_WARN_EMULATED(type, regs)					\
	do {								\
		perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS,		\
			1, regs, 0);					\
		__PPC_WARN_EMULATED(type);				\
	} while (0)

#define PPC_WARN_ALIGNMENT(type, regs)					\
	do {								\
		perf_sw_event(PERF_COUNT_SW_ALIGNMENT_FAULTS,		\
			1, regs, regs->dar);				\
		__PPC_WARN_EMULATED(type);				\
	} while (0)

#endif /* _ASM_POWERPC_EMULATED_OPS_H */

Annotation

• Immediate include surface: `linux/atomic.h`, `linux/perf_event.h`.
• Detected declarations: `struct ppc_emulated_entry`.
• Atlas domain: Architecture Layer / arch/powerpc.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.