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yaml --- r: 58778 b: refs/heads/master c: 1d67953 h: refs/heads/master v: v3
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Venki Pallipadi
authored and
Linus Torvalds
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Jul 12, 2007
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@@ -1,2 +1,2 @@ | ||
--- | ||
refs/heads/master: e087db510cd96a75a614f6f6fcd5499ab21cb087 | ||
refs/heads/master: 1d67953f2bda8876045c24ae58841f27d9bb7572 |
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@@ -0,0 +1,50 @@ | ||
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/* | ||
* Routines to indentify additional cpu features that are scattered in | ||
* cpuid space. | ||
*/ | ||
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#include <linux/cpu.h> | ||
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#include <asm/processor.h> | ||
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struct cpuid_bit { | ||
u16 feature; | ||
u8 reg; | ||
u8 bit; | ||
u32 level; | ||
}; | ||
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enum cpuid_regs { | ||
CR_EAX = 0, | ||
CR_ECX, | ||
CR_EDX, | ||
CR_EBX | ||
}; | ||
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void __cpuinit init_scattered_cpuid_features(struct cpuinfo_x86 *c) | ||
{ | ||
u32 max_level; | ||
u32 regs[4]; | ||
const struct cpuid_bit *cb; | ||
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static const struct cpuid_bit cpuid_bits[] = { | ||
{ X86_FEATURE_IDA, CR_EAX, 1, 0x00000006 }, | ||
{ 0, 0, 0, 0 } | ||
}; | ||
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for (cb = cpuid_bits; cb->feature; cb++) { | ||
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/* Verify that the level is valid */ | ||
max_level = cpuid_eax(cb->level & 0xffff0000); | ||
if (max_level < cb->level || | ||
max_level > (cb->level | 0xffff)) | ||
continue; | ||
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cpuid(cb->level, ®s[CR_EAX], ®s[CR_EBX], | ||
®s[CR_ECX], ®s[CR_EDX]); | ||
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if (regs[cb->reg] & (1 << cb->bit)) | ||
set_bit(cb->feature, c->x86_capability); | ||
} | ||
} |
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Original file line number | Diff line number | Diff line change |
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@@ -50,5 +50,6 @@ | |
#define REQUIRED_MASK4 0 | ||
#define REQUIRED_MASK5 0 | ||
#define REQUIRED_MASK6 0 | ||
#define REQUIRED_MASK7 0 | ||
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#endif |
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@@ -41,5 +41,6 @@ | |
#define REQUIRED_MASK4 0 | ||
#define REQUIRED_MASK5 0 | ||
#define REQUIRED_MASK6 0 | ||
#define REQUIRED_MASK7 0 | ||
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#endif |