Messages in this thread |  | | From | Nick Desaulniers <> | Date | Mon, 1 Jun 2020 13:48:45 -0700 | Subject | Re: [PATCH v2 01/10] x86/percpu: Introduce size abstraction macros |
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On Sat, May 30, 2020 at 3:11 PM Brian Gerst <brgerst@gmail.com> wrote: > > In preparation for cleaning up the percpu operations, define macros for > abstraction based on the width of the operation. > > Signed-off-by: Brian Gerst <brgerst@gmail.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
> --- > arch/x86/include/asm/percpu.h | 30 ++++++++++++++++++++++++++++++ > 1 file changed, 30 insertions(+) > > diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h > index 2278797c769d..19838e4f7a8f 100644 > --- a/arch/x86/include/asm/percpu.h > +++ b/arch/x86/include/asm/percpu.h > @@ -87,6 +87,36 @@ > * don't give an lvalue though). */ > extern void __bad_percpu_size(void); > > +#define __pcpu_type_1 u8 > +#define __pcpu_type_2 u16 > +#define __pcpu_type_4 u32 > +#define __pcpu_type_8 u64 > + > +#define __pcpu_cast_1(val) ((u8)(((unsigned long) val) & 0xff)) > +#define __pcpu_cast_2(val) ((u16)(((unsigned long) val) & 0xffff)) > +#define __pcpu_cast_4(val) ((u32)(((unsigned long) val) & 0xffffffff)) > +#define __pcpu_cast_8(val) ((u64)(val)) > + > +#define __pcpu_op1_1(op, dst) op "b " dst > +#define __pcpu_op1_2(op, dst) op "w " dst > +#define __pcpu_op1_4(op, dst) op "l " dst > +#define __pcpu_op1_8(op, dst) op "q " dst > + > +#define __pcpu_op2_1(op, src, dst) op "b " src ", " dst > +#define __pcpu_op2_2(op, src, dst) op "w " src ", " dst > +#define __pcpu_op2_4(op, src, dst) op "l " src ", " dst > +#define __pcpu_op2_8(op, src, dst) op "q " src ", " dst > + > +#define __pcpu_reg_1(mod, x) mod "q" (x) > +#define __pcpu_reg_2(mod, x) mod "r" (x) > +#define __pcpu_reg_4(mod, x) mod "r" (x) > +#define __pcpu_reg_8(mod, x) mod "r" (x) > + > +#define __pcpu_reg_imm_1(x) "qi" (x) > +#define __pcpu_reg_imm_2(x) "ri" (x) > +#define __pcpu_reg_imm_4(x) "ri" (x) > +#define __pcpu_reg_imm_8(x) "re" (x) > + > #define percpu_to_op(qual, op, var, val) \ > do { \ > typedef typeof(var) pto_T__; \ > -- > 2.25.4 >
-- Thanks, ~Nick Desaulniers
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