diff options
Diffstat (limited to 'arch/x86/include/asm/percpu.h')
| -rw-r--r-- | arch/x86/include/asm/percpu.h | 74 |
1 files changed, 68 insertions, 6 deletions
diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h index 13c0d63ed55e..4232fb246de0 100644 --- a/arch/x86/include/asm/percpu.h +++ b/arch/x86/include/asm/percpu.h @@ -210,6 +210,67 @@ do { \ (typeof(_var))(unsigned long) pco_old__; \ }) +#if defined(CONFIG_X86_32) && !defined(CONFIG_UML) +#define percpu_cmpxchg64_op(size, qual, _var, _oval, _nval) \ +({ \ + union { \ + u64 var; \ + struct { \ + u32 low, high; \ + }; \ + } old__, new__; \ + \ + old__.var = _oval; \ + new__.var = _nval; \ + \ + asm qual (ALTERNATIVE("leal %P[var], %%esi; call this_cpu_cmpxchg8b_emu", \ + "cmpxchg8b " __percpu_arg([var]), X86_FEATURE_CX8) \ + : [var] "+m" (_var), \ + "+a" (old__.low), \ + "+d" (old__.high) \ + : "b" (new__.low), \ + "c" (new__.high) \ + : "memory", "esi"); \ + \ + old__.var; \ +}) + +#define raw_cpu_cmpxchg64(pcp, oval, nval) percpu_cmpxchg64_op(8, , pcp, oval, nval) +#define this_cpu_cmpxchg64(pcp, oval, nval) percpu_cmpxchg64_op(8, volatile, pcp, oval, nval) +#endif + +#ifdef CONFIG_X86_64 +#define raw_cpu_cmpxchg64(pcp, oval, nval) percpu_cmpxchg_op(8, , pcp, oval, nval); +#define this_cpu_cmpxchg64(pcp, oval, nval) percpu_cmpxchg_op(8, volatile, pcp, oval, nval); + +#define percpu_cmpxchg128_op(size, qual, _var, _oval, _nval) \ +({ \ + union { \ + u128 var; \ + struct { \ + u64 low, high; \ + }; \ + } old__, new__; \ + \ + old__.var = _oval; \ + new__.var = _nval; \ + \ + asm qual (ALTERNATIVE("leaq %P[var], %%rsi; call this_cpu_cmpxchg16b_emu", \ + "cmpxchg16b " __percpu_arg([var]), X86_FEATURE_CX16) \ + : [var] "+m" (_var), \ + "+a" (old__.low), \ + "+d" (old__.high) \ + : "b" (new__.low), \ + "c" (new__.high) \ + : "memory", "rsi"); \ + \ + old__.var; \ +}) + +#define raw_cpu_cmpxchg128(pcp, oval, nval) percpu_cmpxchg128_op(16, , pcp, oval, nval) +#define this_cpu_cmpxchg128(pcp, oval, nval) percpu_cmpxchg128_op(16, volatile, pcp, oval, nval) +#endif + /* * this_cpu_read() makes gcc load the percpu variable every time it is * accessed while this_cpu_read_stable() allows the value to be cached. @@ -341,12 +402,13 @@ do { \ bool __ret; \ typeof(pcp1) __o1 = (o1), __n1 = (n1); \ typeof(pcp2) __o2 = (o2), __n2 = (n2); \ - alternative_io("leaq %P1,%%rsi\n\tcall this_cpu_cmpxchg16b_emu\n\t", \ - "cmpxchg16b " __percpu_arg(1) "\n\tsetz %0\n\t", \ - X86_FEATURE_CX16, \ - ASM_OUTPUT2("=a" (__ret), "+m" (pcp1), \ - "+m" (pcp2), "+d" (__o2)), \ - "b" (__n1), "c" (__n2), "a" (__o1) : "rsi"); \ + asm volatile (ALTERNATIVE("leaq %P1, %%rsi; call this_cpu_cmpxchg16b_emu", \ + "cmpxchg16b " __percpu_arg(1), X86_FEATURE_CX16) \ + "setz %0" \ + : "=a" (__ret), "+m" (pcp1) \ + : "b" (__n1), "c" (__n2), \ + "a" (__o1), "d" (__o2) \ + : "memory", "rsi"); \ __ret; \ }) |