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| author |   Laura Abbott <lauraa@codeaurora.org> | 2013-06-17 10:29:13 -0700 |
|---|---|---|
| committer |   Russell King <rmk+kernel@arm.linux.org.uk> | 2013-12-11 09:53:19 +0000 |
| commit | 75374ad47c6465de6c098d7b913fe02d6131195c (patch) | |
| tree | ade5f83cf6baea175e6380c986777f0b7979d940 /arch/arm/mm | |
| parent | ARM: add definitions for pte_mkexec/pte_mknexec (diff) | |
| download | linux-dev-75374ad47c6465de6c098d7b913fe02d6131195c.tar.xz linux-dev-75374ad47c6465de6c098d7b913fe02d6131195c.zip | |
ARM: mm: Define set_memory_* functions for ARM
Other architectures define various set_memory functions to allow
attributes to be changed (e.g. set_memory_x, set_memory_rw, etc.)
Currently, these functions are missing on ARM. Define these in an
appropriate manner for ARM.
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm')
| -rw-r--r-- | arch/arm/mm/mmu.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index 9ec715f12224..09033890c8b0 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -345,6 +345,44 @@ const struct mem_type *get_mem_type(unsigned int type) } EXPORT_SYMBOL(get_mem_type); +#define PTE_SET_FN(_name, pteop) \ +static int pte_set_##_name(pte_t *ptep, pgtable_t token, unsigned long addr, \ + void *data) \ +{ \ + pte_t pte = pteop(*ptep); \ +\ + set_pte_ext(ptep, pte, 0); \ + return 0; \ +} \ + +#define SET_MEMORY_FN(_name, callback) \ +int set_memory_##_name(unsigned long addr, int numpages) \ +{ \ + unsigned long start = addr; \ + unsigned long size = PAGE_SIZE*numpages; \ + unsigned end = start + size; \ +\ + if (start < MODULES_VADDR || start >= MODULES_END) \ + return -EINVAL;\ +\ + if (end < MODULES_VADDR || end >= MODULES_END) \ + return -EINVAL; \ +\ + apply_to_page_range(&init_mm, start, size, callback, NULL); \ + flush_tlb_kernel_range(start, end); \ + return 0;\ +} + +PTE_SET_FN(ro, pte_wrprotect) +PTE_SET_FN(rw, pte_mkwrite) +PTE_SET_FN(x, pte_mkexec) +PTE_SET_FN(nx, pte_mknexec) + +SET_MEMORY_FN(ro, pte_set_ro) +SET_MEMORY_FN(rw, pte_set_rw) +SET_MEMORY_FN(x, pte_set_x) +SET_MEMORY_FN(nx, pte_set_nx) + /* * Adjust the PMD section entries according to the CPU in use. */ |