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| author | Ingo Molnar <mingo@kernel.org> | 2012-04-14 15:18:27 +0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-04-14 15:19:04 +0400 |
| commit | 6ac1ef482d7ae0c690f1640bf6eb818ff9a2d91e (patch) | |
| tree | 021cc9f6b477146fcebe6f3be4752abfa2ba18a9 /arch/arm/mm/mm.h | |
| parent | 682968e0c425c60f0dde37977e5beb2b12ddc4cc (diff) | |
| parent | a385ec4f11bdcf81af094c03e2444ee9b7fad2e5 (diff) | |
| download | linux-6ac1ef482d7ae0c690f1640bf6eb818ff9a2d91e.tar.xz | |
Merge branch 'perf/core' into perf/uprobes
Merge in latest upstream (and the latest perf development tree),
to prepare for tooling changes, and also to pick up v3.4 MM
changes that the uprobes code needs to take care of.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/arm/mm/mm.h')
| -rw-r--r-- | arch/arm/mm/mm.h | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/arch/arm/mm/mm.h b/arch/arm/mm/mm.h index 70f6d3ea4834..27f4a619b35d 100644 --- a/arch/arm/mm/mm.h +++ b/arch/arm/mm/mm.h @@ -3,7 +3,31 @@ /* the upper-most page table pointer */ extern pmd_t *top_pmd; -#define TOP_PTE(x) pte_offset_kernel(top_pmd, x) +/* + * 0xffff8000 to 0xffffffff is reserved for any ARM architecture + * specific hacks for copying pages efficiently, while 0xffff4000 + * is reserved for VIPT aliasing flushing by generic code. + * + * Note that we don't allow VIPT aliasing caches with SMP. + */ +#define COPYPAGE_MINICACHE 0xffff8000 +#define COPYPAGE_V6_FROM 0xffff8000 +#define COPYPAGE_V6_TO 0xffffc000 +/* PFN alias flushing, for VIPT caches */ +#define FLUSH_ALIAS_START 0xffff4000 + +static inline void set_top_pte(unsigned long va, pte_t pte) +{ + pte_t *ptep = pte_offset_kernel(top_pmd, va); + set_pte_ext(ptep, pte, 0); + local_flush_tlb_kernel_page(va); +} + +static inline pte_t get_top_pte(unsigned long va) +{ + pte_t *ptep = pte_offset_kernel(top_pmd, va); + return *ptep; +} static inline pmd_t *pmd_off_k(unsigned long virt) { |