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author | Ingo Molnar <mingo@kernel.org> | 2019-11-20 17:33:57 +0300 |
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committer | Ingo Molnar <mingo@kernel.org> | 2019-12-10 12:12:55 +0300 |
commit | eb243d1d28663c9b92010973a6a3ffa947f682ba (patch) | |
tree | b60706ed6277facc8e8c362a20b464509a0c8631 /arch/x86/include/asm/memtype.h | |
parent | ecdd6ee77b73d11fcf2ca6739e4d1fe590446599 (diff) | |
download | linux-eb243d1d28663c9b92010973a6a3ffa947f682ba.tar.xz |
x86/mm/pat: Rename <asm/pat.h> => <asm/memtype.h>
pat.h is a file whose main purpose is to provide the memtype_*() APIs.
PAT is the low level hardware mechanism - but the high level abstraction
is memtype.
So name the header <memtype.h> as well - this goes hand in hand with memtype.c
and memtype_interval.c.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/memtype.h')
-rw-r--r-- | arch/x86/include/asm/memtype.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/x86/include/asm/memtype.h b/arch/x86/include/asm/memtype.h new file mode 100644 index 000000000000..ec18e38ae391 --- /dev/null +++ b/arch/x86/include/asm/memtype.h @@ -0,0 +1,27 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_X86_MEMTYPE_H +#define _ASM_X86_MEMTYPE_H + +#include <linux/types.h> +#include <asm/pgtable_types.h> + +bool pat_enabled(void); +void pat_disable(const char *reason); +extern void pat_init(void); +extern void init_cache_modes(void); + +extern int memtype_reserve(u64 start, u64 end, + enum page_cache_mode req_pcm, enum page_cache_mode *ret_pcm); +extern int memtype_free(u64 start, u64 end); + +extern int memtype_kernel_map_sync(u64 base, unsigned long size, + enum page_cache_mode pcm); + +int memtype_reserve_io(resource_size_t start, resource_size_t end, + enum page_cache_mode *pcm); + +void memtype_free_io(resource_size_t start, resource_size_t end); + +bool pat_pfn_immune_to_uc_mtrr(unsigned long pfn); + +#endif /* _ASM_X86_MEMTYPE_H */ |