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x86: clean up cpu capabilities accesses

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introduce test_cpu_cap() for raw access to the real CPU
capabilities as they are present in x86_capability.

(cpu_has() will shortcut certain tests during build-time)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar
2008-02-26 08:34:21 +01:00
parent d32de19ca9
commit 0f8d2b926d
1 changed files with 5 additions and 1 deletions
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6
include/asm-x86/cpufeature.h
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@@ -120,6 +120,9 @@
extern const char * const x86_cap_flags[NCAPINTS*32]; extern const char * const x86_cap_flags[NCAPINTS*32];
extern const char * const x86_power_flags[32]; extern const char * const x86_power_flags[32];
#define test_cpu_cap(c, bit) \
test_bit(bit, (unsigned long *)((c)->x86_capability))
#define cpu_has(c, bit) \ #define cpu_has(c, bit) \
(__builtin_constant_p(bit) && \ (__builtin_constant_p(bit) && \
( (((bit)>>5)==0 && (1UL<<((bit)&31) & REQUIRED_MASK0)) || \ ( (((bit)>>5)==0 && (1UL<<((bit)&31) & REQUIRED_MASK0)) || \
@@ -131,7 +134,8 @@ extern const char * const x86_power_flags[32];
(((bit)>>5)==6 && (1UL<<((bit)&31) & REQUIRED_MASK6)) || \ (((bit)>>5)==6 && (1UL<<((bit)&31) & REQUIRED_MASK6)) || \
(((bit)>>5)==7 && (1UL<<((bit)&31) & REQUIRED_MASK7)) ) \ (((bit)>>5)==7 && (1UL<<((bit)&31) & REQUIRED_MASK7)) ) \
? 1 : \ ? 1 : \
test_bit(bit, (unsigned long *)((c)->x86_capability))) test_cpu_cap(c, bit))
#define boot_cpu_has(bit) cpu_has(&boot_cpu_data, bit) #define boot_cpu_has(bit) cpu_has(&boot_cpu_data, bit)
#define set_cpu_cap(c, bit) set_bit(bit, (unsigned long *)((c)->x86_capability)) #define set_cpu_cap(c, bit) set_bit(bit, (unsigned long *)((c)->x86_capability))