82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright 2017, Michael Ellerman, IBM Corporation.
|
|
*/
|
|
#ifndef _LINUX_SET_MEMORY_H_
|
|
#define _LINUX_SET_MEMORY_H_
|
|
|
|
#ifdef CONFIG_ARCH_HAS_SET_MEMORY
|
|
#include <asm/set_memory.h>
|
|
#else
|
|
static inline int set_memory_ro(unsigned long addr, int numpages) { return 0; }
|
|
static inline int set_memory_rw(unsigned long addr, int numpages) { return 0; }
|
|
static inline int set_memory_x(unsigned long addr, int numpages) { return 0; }
|
|
static inline int 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 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_ */
|