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| author |   Jordan Niethe <jniethe5@gmail.com> | 2020-05-15 12:12:55 +1000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2020-05-19 00:10:39 +1000 |
| commit | 650b55b707fdfa764e9f2b81314d3eb4216fb962 (patch) | |
| tree | 33027daca271c94467f02d17945afc0517929171 /arch/powerpc/include/asm/uaccess.h | |
| parent | powerpc/optprobes: Add register argument to patch_imm64_load_insns() (diff) | |
| download | linux-dev-650b55b707fdfa764e9f2b81314d3eb4216fb962.tar.xz linux-dev-650b55b707fdfa764e9f2b81314d3eb4216fb962.zip | |
powerpc: Add prefixed instructions to instruction data type
For powerpc64, redefine the ppc_inst type so both word and prefixed
instructions can be represented. On powerpc32 the type will remain the
same. Update places which had assumed instructions to be 4 bytes long.
Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
Reviewed-by: Alistair Popple <alistair@popple.id.au>
[mpe: Rework the get_user_inst() macros to be parameterised, and don't
assign to the dest if an error occurred. Use CONFIG_PPC64 not
__powerpc64__ in a few places. Address other comments from
Christophe. Fix some sparse complaints.]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200506034050.24806-24-jniethe5@gmail.com
Diffstat (limited to 'arch/powerpc/include/asm/uaccess.h')
| -rw-r--r-- | arch/powerpc/include/asm/uaccess.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/uaccess.h b/arch/powerpc/include/asm/uaccess.h index 0d2d0c3dc527..c0523efa1458 100644 --- a/arch/powerpc/include/asm/uaccess.h +++ b/arch/powerpc/include/asm/uaccess.h @@ -105,6 +105,40 @@ static inline int __access_ok(unsigned long addr, unsigned long size, #define __put_user_inatomic(x, ptr) \ __put_user_nosleep((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr))) +#ifdef CONFIG_PPC64 + +#define ___get_user_instr(gu_op, dest, ptr) \ +({ \ + long __gui_ret = 0; \ + unsigned long __gui_ptr = (unsigned long)ptr; \ + struct ppc_inst __gui_inst; \ + unsigned int __prefix, __suffix; \ + __gui_ret = gu_op(__prefix, (unsigned int __user *)__gui_ptr); \ + if (__gui_ret == 0) { \ + if ((__prefix >> 26) == OP_PREFIX) { \ + __gui_ret = gu_op(__suffix, \ + (unsigned int __user *)__gui_ptr + 1); \ + __gui_inst = ppc_inst_prefix(__prefix, \ + __suffix); \ + } else { \ + __gui_inst = ppc_inst(__prefix); \ + } \ + if (__gui_ret == 0) \ + (dest) = __gui_inst; \ + } \ + __gui_ret; \ +}) + +#define get_user_instr(x, ptr) \ + ___get_user_instr(get_user, x, ptr) + +#define __get_user_instr(x, ptr) \ + ___get_user_instr(__get_user, x, ptr) + +#define __get_user_instr_inatomic(x, ptr) \ + ___get_user_instr(__get_user_inatomic, x, ptr) + +#else /* !CONFIG_PPC64 */ #define get_user_instr(x, ptr) \ get_user((x).val, (u32 __user *)(ptr)) @@ -114,6 +148,8 @@ static inline int __access_ok(unsigned long addr, unsigned long size, #define __get_user_instr_inatomic(x, ptr) \ __get_user_nosleep((x).val, (u32 __user *)(ptr), sizeof(u32)) +#endif /* CONFIG_PPC64 */ + extern long __put_user_bad(void); /* |