x86, cpu: Package Level Thermal Control, Power Limit Notification definitions
[linux-2.6.git] / arch / x86 / kernel / cpu / scattered.c
1 /*
2  *      Routines to indentify additional cpu features that are scattered in
3  *      cpuid space.
4  */
5 #include <linux/cpu.h>
6
7 #include <asm/pat.h>
8 #include <asm/processor.h>
9
10 #include <asm/apic.h>
11
12 struct cpuid_bit {
13         u16 feature;
14         u8 reg;
15         u8 bit;
16         u32 level;
17         u32 sub_leaf;
18 };
19
20 enum cpuid_regs {
21         CR_EAX = 0,
22         CR_ECX,
23         CR_EDX,
24         CR_EBX
25 };
26
27 void __cpuinit init_scattered_cpuid_features(struct cpuinfo_x86 *c)
28 {
29         u32 max_level;
30         u32 regs[4];
31         const struct cpuid_bit *cb;
32
33         static const struct cpuid_bit __cpuinitconst cpuid_bits[] = {
34                 { X86_FEATURE_IDA,              CR_EAX, 1, 0x00000006, 0 },
35                 { X86_FEATURE_ARAT,             CR_EAX, 2, 0x00000006, 0 },
36                 { X86_FEATURE_PLN,              CR_EAX, 4, 0x00000006, 0 },
37                 { X86_FEATURE_PTS,              CR_EAX, 6, 0x00000006, 0 },
38                 { X86_FEATURE_APERFMPERF,       CR_ECX, 0, 0x00000006, 0 },
39                 { X86_FEATURE_EPB,              CR_ECX, 3, 0x00000006, 0 },
40                 { X86_FEATURE_XSAVEOPT,         CR_EAX, 0, 0x0000000d, 1 },
41                 { X86_FEATURE_CPB,              CR_EDX, 9, 0x80000007, 0 },
42                 { X86_FEATURE_NPT,              CR_EDX, 0, 0x8000000a, 0 },
43                 { X86_FEATURE_LBRV,             CR_EDX, 1, 0x8000000a, 0 },
44                 { X86_FEATURE_SVML,             CR_EDX, 2, 0x8000000a, 0 },
45                 { X86_FEATURE_NRIPS,            CR_EDX, 3, 0x8000000a, 0 },
46                 { 0, 0, 0, 0, 0 }
47         };
48
49         for (cb = cpuid_bits; cb->feature; cb++) {
50
51                 /* Verify that the level is valid */
52                 max_level = cpuid_eax(cb->level & 0xffff0000);
53                 if (max_level < cb->level ||
54                     max_level > (cb->level | 0xffff))
55                         continue;
56
57                 cpuid_count(cb->level, cb->sub_leaf, &regs[CR_EAX],
58                             &regs[CR_EBX], &regs[CR_ECX], &regs[CR_EDX]);
59
60                 if (regs[cb->reg] & (1 << cb->bit))
61                         set_cpu_cap(c, cb->feature);
62         }
63 }