2 * Routines to indentify additional cpu features that are scattered in
8 #include <asm/processor.h>
27 void __cpuinit
init_scattered_cpuid_features(struct cpuinfo_x86
*c
)
31 const struct cpuid_bit
*cb
;
33 static const struct cpuid_bit __cpuinitconst cpuid_bits
[] = {
34 { X86_FEATURE_DTS
, CR_EAX
, 0, 0x00000006, 0 },
35 { X86_FEATURE_IDA
, CR_EAX
, 1, 0x00000006, 0 },
36 { X86_FEATURE_ARAT
, CR_EAX
, 2, 0x00000006, 0 },
37 { X86_FEATURE_PLN
, CR_EAX
, 4, 0x00000006, 0 },
38 { X86_FEATURE_PTS
, CR_EAX
, 6, 0x00000006, 0 },
39 { X86_FEATURE_APERFMPERF
, CR_ECX
, 0, 0x00000006, 0 },
40 { X86_FEATURE_EPB
, CR_ECX
, 3, 0x00000006, 0 },
41 { X86_FEATURE_XSAVEOPT
, CR_EAX
, 0, 0x0000000d, 1 },
42 { X86_FEATURE_CPB
, CR_EDX
, 9, 0x80000007, 0 },
43 { X86_FEATURE_NPT
, CR_EDX
, 0, 0x8000000a, 0 },
44 { X86_FEATURE_LBRV
, CR_EDX
, 1, 0x8000000a, 0 },
45 { X86_FEATURE_SVML
, CR_EDX
, 2, 0x8000000a, 0 },
46 { X86_FEATURE_NRIPS
, CR_EDX
, 3, 0x8000000a, 0 },
50 for (cb
= cpuid_bits
; cb
->feature
; cb
++) {
52 /* Verify that the level is valid */
53 max_level
= cpuid_eax(cb
->level
& 0xffff0000);
54 if (max_level
< cb
->level
||
55 max_level
> (cb
->level
| 0xffff))
58 cpuid_count(cb
->level
, cb
->sub_leaf
, ®s
[CR_EAX
],
59 ®s
[CR_EBX
], ®s
[CR_ECX
], ®s
[CR_EDX
]);
61 if (regs
[cb
->reg
] & (1 << cb
->bit
))
62 set_cpu_cap(c
, cb
->feature
);