93 lines
3.8 KiB
C
93 lines
3.8 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
|
#ifndef _ASM_X86_SET_MEMORY_H
|
||
|
|
#define _ASM_X86_SET_MEMORY_H
|
||
|
|
|
||
|
|
#include <linux/mm.h>
|
||
|
|
#include <asm/page.h>
|
||
|
|
#include <asm-generic/set_memory.h>
|
||
|
|
|
||
|
|
#define set_memory_rox set_memory_rox
|
||
|
|
int set_memory_rox(unsigned long addr, int numpages);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The set_memory_* API can be used to change various attributes of a virtual
|
||
|
|
* address range. The attributes include:
|
||
|
|
* Cacheability : UnCached, WriteCombining, WriteThrough, WriteBack
|
||
|
|
* Executability : eXecutable, NoteXecutable
|
||
|
|
* Read/Write : ReadOnly, ReadWrite
|
||
|
|
* Presence : NotPresent
|
||
|
|
* Encryption : Encrypted, Decrypted
|
||
|
|
*
|
||
|
|
* Within a category, the attributes are mutually exclusive.
|
||
|
|
*
|
||
|
|
* The implementation of this API will take care of various aspects that
|
||
|
|
* are associated with changing such attributes, such as:
|
||
|
|
* - Flushing TLBs
|
||
|
|
* - Flushing CPU caches
|
||
|
|
* - Making sure aliases of the memory behind the mapping don't violate
|
||
|
|
* coherency rules as defined by the CPU in the system.
|
||
|
|
*
|
||
|
|
* What this API does not do:
|
||
|
|
* - Provide exclusion between various callers - including callers that
|
||
|
|
* operation on other mappings of the same physical page
|
||
|
|
* - Restore default attributes when a page is freed
|
||
|
|
* - Guarantee that mappings other than the requested one are
|
||
|
|
* in any state, other than that these do not violate rules for
|
||
|
|
* the CPU you have. Do not depend on any effects on other mappings,
|
||
|
|
* CPUs other than the one you have may have more relaxed rules.
|
||
|
|
* The caller is required to take care of these.
|
||
|
|
*/
|
||
|
|
|
||
|
|
int __set_memory_prot(unsigned long addr, int numpages, pgprot_t prot);
|
||
|
|
int _set_memory_uc(unsigned long addr, int numpages);
|
||
|
|
int _set_memory_wc(unsigned long addr, int numpages);
|
||
|
|
int _set_memory_wt(unsigned long addr, int numpages);
|
||
|
|
int _set_memory_wb(unsigned long addr, int numpages);
|
||
|
|
int set_memory_uc(unsigned long addr, int numpages);
|
||
|
|
int set_memory_wc(unsigned long addr, int numpages);
|
||
|
|
int set_memory_wb(unsigned long addr, int numpages);
|
||
|
|
int set_memory_np(unsigned long addr, int numpages);
|
||
|
|
int set_memory_4k(unsigned long addr, int numpages);
|
||
|
|
int set_memory_encrypted(unsigned long addr, int numpages);
|
||
|
|
int set_memory_decrypted(unsigned long addr, int numpages);
|
||
|
|
int set_memory_np_noalias(unsigned long addr, int numpages);
|
||
|
|
int set_memory_nonglobal(unsigned long addr, int numpages);
|
||
|
|
int set_memory_global(unsigned long addr, int numpages);
|
||
|
|
|
||
|
|
int set_pages_array_uc(struct page **pages, int addrinarray);
|
||
|
|
int set_pages_array_wc(struct page **pages, int addrinarray);
|
||
|
|
int set_pages_array_wb(struct page **pages, int addrinarray);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* For legacy compatibility with the old APIs, a few functions
|
||
|
|
* are provided that work on a "struct page".
|
||
|
|
* These functions operate ONLY on the 1:1 kernel mapping of the
|
||
|
|
* memory that the struct page represents, and internally just
|
||
|
|
* call the set_memory_* function. See the description of the
|
||
|
|
* set_memory_* function for more details on conventions.
|
||
|
|
*
|
||
|
|
* These APIs should be considered *deprecated* and are likely going to
|
||
|
|
* be removed in the future.
|
||
|
|
* The reason for this is the implicit operation on the 1:1 mapping only,
|
||
|
|
* making this not a generally useful API.
|
||
|
|
*
|
||
|
|
* Specifically, many users of the old APIs had a virtual address,
|
||
|
|
* called virt_to_page() or vmalloc_to_page() on that address to
|
||
|
|
* get a struct page* that the old API required.
|
||
|
|
* To convert these cases, use set_memory_*() on the original
|
||
|
|
* virtual address, do not use these functions.
|
||
|
|
*/
|
||
|
|
|
||
|
|
int set_pages_uc(struct page *page, int numpages);
|
||
|
|
int set_pages_wb(struct page *page, int numpages);
|
||
|
|
int set_pages_ro(struct page *page, int numpages);
|
||
|
|
int set_pages_rw(struct page *page, int numpages);
|
||
|
|
|
||
|
|
int set_direct_map_invalid_noflush(struct page *page);
|
||
|
|
int set_direct_map_default_noflush(struct page *page);
|
||
|
|
bool kernel_page_present(struct page *page);
|
||
|
|
|
||
|
|
extern int kernel_set_to_readonly;
|
||
|
|
|
||
|
|
#endif /* _ASM_X86_SET_MEMORY_H */
|