include/linux/set_memory.h

Source file repositories/reference/linux-study-clean/include/linux/set_memory.h

File Facts

System
Linux kernel
Corpus path
include/linux/set_memory.h
Extension
.h
Size
2114 bytes
Lines
88
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

static inline int __must_check set_memory_ro(unsigned long addr, int numpages) { return 0; }
static inline int __must_check set_memory_rw(unsigned long addr, int numpages) { return 0; }
static inline int __must_check set_memory_x(unsigned long addr,  int numpages) { return 0; }
static inline int __must_check set_memory_nx(unsigned long addr, int numpages) { return 0; }
#endif

#ifndef set_memory_rox
static inline int set_memory_rox(unsigned long addr, int numpages)
{
	int ret = set_memory_ro(addr, numpages);
	if (ret)
		return ret;
	return set_memory_x(addr, numpages);
}
#endif

#ifndef CONFIG_ARCH_HAS_SET_DIRECT_MAP
static inline int set_direct_map_invalid_noflush(struct page *page)
{
	return 0;
}
static inline int set_direct_map_default_noflush(struct page *page)
{
	return 0;
}

static inline int set_direct_map_valid_noflush(struct page *page,
					       unsigned nr, bool valid)
{
	return 0;
}

static inline bool kernel_page_present(struct page *page)
{
	return true;
}
#else /* CONFIG_ARCH_HAS_SET_DIRECT_MAP */
/*
 * Some architectures, e.g. ARM64 can disable direct map modifications at
 * boot time. Let them overrive this query.
 */
#ifndef can_set_direct_map
static inline bool can_set_direct_map(void)
{
	return true;
}
#define can_set_direct_map can_set_direct_map
#endif
#endif /* CONFIG_ARCH_HAS_SET_DIRECT_MAP */

#ifdef CONFIG_X86_64
int set_mce_nospec(unsigned long pfn);
int clear_mce_nospec(unsigned long pfn);
#else
static inline int set_mce_nospec(unsigned long pfn)
{
	return 0;
}
static inline int clear_mce_nospec(unsigned long pfn)
{
	return 0;
}
#endif

#ifndef CONFIG_ARCH_HAS_MEM_ENCRYPT
static inline int set_memory_encrypted(unsigned long addr, int numpages)
{
	return 0;
}

static inline int set_memory_decrypted(unsigned long addr, int numpages)
{
	return 0;
}
#endif /* CONFIG_ARCH_HAS_MEM_ENCRYPT */

#endif /* _LINUX_SET_MEMORY_H_ */

Annotation

Implementation Notes