mirror of
https://github.com/torvalds/linux.git
synced 2026-05-01 21:12:29 -04:00
0c6378a715
Add an API that will allow updates of the direct/linear map for a set of physically contiguous pages. It will be used in the following patches. Link: https://lkml.kernel.org/r/20241023162711.2579610-6-rppt@kernel.org Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> Tested-by: kdevops <kdevops@lists.linux.dev> Cc: Andreas Larsson <andreas@gaisler.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov (AMD) <bp@alien8.de> Cc: Brian Cain <bcain@quicinc.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Dinh Nguyen <dinguyen@kernel.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Guo Ren <guoren@kernel.org> Cc: Helge Deller <deller@gmx.de> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Kent Overstreet <kent.overstreet@linux.dev> Cc: Liam R. Howlett <Liam.Howlett@Oracle.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Masami Hiramatsu (Google) <mhiramat@kernel.org> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Richard Weinberger <richard@nod.at> Cc: Russell King <linux@armlinux.org.uk> Cc: Song Liu <song@kernel.org> Cc: Stafford Horne <shorne@gmail.com> Cc: Steven Rostedt (Google) <rostedt@goodmis.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Uladzislau Rezki (Sony) <urezki@gmail.com> Cc: Vineet Gupta <vgupta@kernel.org> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
98 lines
4.0 KiB
C
98 lines
4.0 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_p(unsigned long addr, int numpages);
|
|
int set_memory_4k(unsigned long addr, int numpages);
|
|
|
|
bool set_memory_enc_stop_conversion(void);
|
|
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);
|
|
int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid);
|
|
bool kernel_page_present(struct page *page);
|
|
|
|
extern int kernel_set_to_readonly;
|
|
|
|
#endif /* _ASM_X86_SET_MEMORY_H */
|