diff options
| author | Catalin Marinas <catalin.marinas@arm.com> | 2012-03-05 15:49:27 +0400 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2012-09-17 16:41:57 +0400 |
| commit | 1d18c47c735e8adfe531fc41fae31e98f86b68fe (patch) | |
| tree | b63f253304e2d955e1a17d12e4f0dc94312f58ea /arch/arm64/mm/extable.c | |
| parent | c1cc1552616d0f354d040823151e61634e7ad01f (diff) | |
| download | linux-1d18c47c735e8adfe531fc41fae31e98f86b68fe.tar.xz | |
arm64: MMU fault handling and page table management
This patch adds support for the handling of the MMU faults (exception
entry code introduced by a previous patch) and page table management.
The user translation table is pointed to by TTBR0 and the kernel one
(swapper_pg_dir) by TTBR1. There is no translation information shared or
address space overlapping between user and kernel page tables.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm64/mm/extable.c')
| -rw-r--r-- | arch/arm64/mm/extable.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm64/mm/extable.c b/arch/arm64/mm/extable.c new file mode 100644 index 000000000000..79444279ba8c --- /dev/null +++ b/arch/arm64/mm/extable.c @@ -0,0 +1,17 @@ +/* + * Based on arch/arm/mm/extable.c + */ + +#include <linux/module.h> +#include <linux/uaccess.h> + +int fixup_exception(struct pt_regs *regs) +{ + const struct exception_table_entry *fixup; + + fixup = search_exception_tables(instruction_pointer(regs)); + if (fixup) + regs->pc = fixup->fixup; + + return fixup != NULL; +} |