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| author | Johannes Berg <johannes.berg@intel.com> | 2020-12-05 23:50:17 +0300 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2020-12-14 00:38:06 +0300 |
| commit | 963285b0b47a1b8e1dfa5481717855a7057ccec6 (patch) | |
| tree | 5cc496b11441604641ded80b7fc1b8551993f7c5 /arch/um/include | |
| parent | 58b09f68697066dfde948153c82dd5d85e10f127 (diff) | |
| download | linux-963285b0b47a1b8e1dfa5481717855a7057ccec6.tar.xz | |
um: support some of ARCH_HAS_SET_MEMORY
For now, only support set_memory_ro()/rw() which we need for
the stack protection in the next patch.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/um/include')
| -rw-r--r-- | arch/um/include/asm/pgtable.h | 3 | ||||
| -rw-r--r-- | arch/um/include/asm/set_memory.h | 1 |
2 files changed, 4 insertions, 0 deletions
diff --git a/arch/um/include/asm/pgtable.h b/arch/um/include/asm/pgtable.h index def376194dce..39376bb63abf 100644 --- a/arch/um/include/asm/pgtable.h +++ b/arch/um/include/asm/pgtable.h @@ -55,12 +55,15 @@ extern unsigned long end_iomem; #define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY) #define __PAGE_KERNEL_EXEC \ (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED) +#define __PAGE_KERNEL_RO \ + (_PAGE_PRESENT | _PAGE_DIRTY | _PAGE_ACCESSED) #define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED) #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED) #define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED) #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED) #define PAGE_KERNEL __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED) #define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC) +#define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO) /* * The i386 can't do page protection for execute, and considers that the same diff --git a/arch/um/include/asm/set_memory.h b/arch/um/include/asm/set_memory.h new file mode 100644 index 000000000000..24266c63720d --- /dev/null +++ b/arch/um/include/asm/set_memory.h @@ -0,0 +1 @@ +#include <asm-generic/set_memory.h> |