direct-io.hg

view xen/include/asm-x86/cpufeature.h @ 13800:01ec7dba9ff8

Hide RDTSCP feature flag from PV guests.

Linux 2.6.19 (x86-64) makes use of this feature if available, but Xen
(validly) fails the attempt to write the respective MSR. Hence the
feature must be hidden from PV guests.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
author kfraser@localhost.localdomain
date Fri Feb 02 16:07:13 2007 +0000 (2007-02-02)
parents 3ffb6cc6b8d2
children 0cbf1586a432
line source
1 /*
2 * cpufeature.h
3 *
4 * Defines x86 CPU feature bits
5 */
7 #ifndef __ASM_I386_CPUFEATURE_H
8 #define __ASM_I386_CPUFEATURE_H
10 #include <xen/bitops.h>
12 #define NCAPINTS 7 /* N 32-bit words worth of info */
14 /* Intel-defined CPU features, CPUID level 0x00000001 (edx), word 0 */
15 #define X86_FEATURE_FPU (0*32+ 0) /* Onboard FPU */
16 #define X86_FEATURE_VME (0*32+ 1) /* Virtual Mode Extensions */
17 #define X86_FEATURE_DE (0*32+ 2) /* Debugging Extensions */
18 #define X86_FEATURE_PSE (0*32+ 3) /* Page Size Extensions */
19 #define X86_FEATURE_TSC (0*32+ 4) /* Time Stamp Counter */
20 #define X86_FEATURE_MSR (0*32+ 5) /* Model-Specific Registers, RDMSR, WRMSR */
21 #define X86_FEATURE_PAE (0*32+ 6) /* Physical Address Extensions */
22 #define X86_FEATURE_MCE (0*32+ 7) /* Machine Check Architecture */
23 #define X86_FEATURE_CX8 (0*32+ 8) /* CMPXCHG8 instruction */
24 #define X86_FEATURE_APIC (0*32+ 9) /* Onboard APIC */
25 #define X86_FEATURE_SEP (0*32+11) /* SYSENTER/SYSEXIT */
26 #define X86_FEATURE_MTRR (0*32+12) /* Memory Type Range Registers */
27 #define X86_FEATURE_PGE (0*32+13) /* Page Global Enable */
28 #define X86_FEATURE_MCA (0*32+14) /* Machine Check Architecture */
29 #define X86_FEATURE_CMOV (0*32+15) /* CMOV instruction (FCMOVCC and FCOMI too if FPU present) */
30 #define X86_FEATURE_PAT (0*32+16) /* Page Attribute Table */
31 #define X86_FEATURE_PSE36 (0*32+17) /* 36-bit PSEs */
32 #define X86_FEATURE_PN (0*32+18) /* Processor serial number */
33 #define X86_FEATURE_CLFLSH (0*32+19) /* Supports the CLFLUSH instruction */
34 #define X86_FEATURE_DTES (0*32+21) /* Debug Trace Store */
35 #define X86_FEATURE_ACPI (0*32+22) /* ACPI via MSR */
36 #define X86_FEATURE_MMX (0*32+23) /* Multimedia Extensions */
37 #define X86_FEATURE_FXSR (0*32+24) /* FXSAVE and FXRSTOR instructions (fast save and restore */
38 /* of FPU context), and CR4.OSFXSR available */
39 #define X86_FEATURE_XMM (0*32+25) /* Streaming SIMD Extensions */
40 #define X86_FEATURE_XMM2 (0*32+26) /* Streaming SIMD Extensions-2 */
41 #define X86_FEATURE_SELFSNOOP (0*32+27) /* CPU self snoop */
42 #define X86_FEATURE_HT (0*32+28) /* Hyper-Threading */
43 #define X86_FEATURE_ACC (0*32+29) /* Automatic clock control */
44 #define X86_FEATURE_IA64 (0*32+30) /* IA-64 processor */
46 /* AMD-defined CPU features, CPUID level 0x80000001, word 1 */
47 /* Don't duplicate feature flags which are redundant with Intel! */
48 #define X86_FEATURE_SYSCALL (1*32+11) /* SYSCALL/SYSRET */
49 #define X86_FEATURE_MP (1*32+19) /* MP Capable. */
50 #define X86_FEATURE_NX (1*32+20) /* Execute Disable */
51 #define X86_FEATURE_MMXEXT (1*32+22) /* AMD MMX extensions */
52 #define X86_FEATURE_RDTSCP (1*32+27) /* RDTSCP */
53 #define X86_FEATURE_LM (1*32+29) /* Long Mode (x86-64) */
54 #define X86_FEATURE_3DNOWEXT (1*32+30) /* AMD 3DNow! extensions */
55 #define X86_FEATURE_3DNOW (1*32+31) /* 3DNow! */
57 /* Transmeta-defined CPU features, CPUID level 0x80860001, word 2 */
58 #define X86_FEATURE_RECOVERY (2*32+ 0) /* CPU in recovery mode */
59 #define X86_FEATURE_LONGRUN (2*32+ 1) /* Longrun power control */
60 #define X86_FEATURE_LRTI (2*32+ 3) /* LongRun table interface */
62 /* Other features, Linux-defined mapping, word 3 */
63 /* This range is used for feature bits which conflict or are synthesized */
64 #define X86_FEATURE_CXMMX (3*32+ 0) /* Cyrix MMX extensions */
65 #define X86_FEATURE_K6_MTRR (3*32+ 1) /* AMD K6 nonstandard MTRRs */
66 #define X86_FEATURE_CYRIX_ARR (3*32+ 2) /* Cyrix ARRs (= MTRRs) */
67 #define X86_FEATURE_CENTAUR_MCR (3*32+ 3) /* Centaur MCRs (= MTRRs) */
68 /* cpu types for specific tunings: */
69 #define X86_FEATURE_K8 (3*32+ 4) /* Opteron, Athlon64 */
70 #define X86_FEATURE_K7 (3*32+ 5) /* Athlon */
71 #define X86_FEATURE_P3 (3*32+ 6) /* P3 */
72 #define X86_FEATURE_P4 (3*32+ 7) /* P4 */
73 #define X86_FEATURE_CONSTANT_TSC (3*32+ 8) /* TSC ticks at a constant rate */
75 /* Intel-defined CPU features, CPUID level 0x00000001 (ecx), word 4 */
76 #define X86_FEATURE_XMM3 (4*32+ 0) /* Streaming SIMD Extensions-3 */
77 #define X86_FEATURE_MWAIT (4*32+ 3) /* Monitor/Mwait support */
78 #define X86_FEATURE_DSCPL (4*32+ 4) /* CPL Qualified Debug Store */
79 #define X86_FEATURE_VMXE (4*32+ 5) /* Virtual Machine Extensions */
80 #define X86_FEATURE_EST (4*32+ 7) /* Enhanced SpeedStep */
81 #define X86_FEATURE_TM2 (4*32+ 8) /* Thermal Monitor 2 */
82 #define X86_FEATURE_CID (4*32+10) /* Context ID */
83 #define X86_FEATURE_CX16 (4*32+13) /* CMPXCHG16B */
84 #define X86_FEATURE_XTPR (4*32+14) /* Send Task Priority Messages */
86 /* VIA/Cyrix/Centaur-defined CPU features, CPUID level 0xC0000001, word 5 */
87 #define X86_FEATURE_XSTORE (5*32+ 2) /* on-CPU RNG present (xstore insn) */
88 #define X86_FEATURE_XSTORE_EN (5*32+ 3) /* on-CPU RNG enabled */
89 #define X86_FEATURE_XCRYPT (5*32+ 6) /* on-CPU crypto (xcrypt insn) */
90 #define X86_FEATURE_XCRYPT_EN (5*32+ 7) /* on-CPU crypto enabled */
92 /* More extended AMD flags: CPUID level 0x80000001, ecx, word 6 */
93 #define X86_FEATURE_LAHF_LM (6*32+ 0) /* LAHF/SAHF in long mode */
94 #define X86_FEATURE_CMP_LEGACY (6*32+ 1) /* If yes HyperThreading not valid */
95 #define X86_FEATURE_SVME (6*32+ 2) /* Secure Virtual Machine */
97 #define cpu_has(c, bit) test_bit(bit, (c)->x86_capability)
98 #define boot_cpu_has(bit) test_bit(bit, boot_cpu_data.x86_capability)
100 #ifdef __i386__
101 #define cpu_has_vme boot_cpu_has(X86_FEATURE_VME)
102 #define cpu_has_de boot_cpu_has(X86_FEATURE_DE)
103 #define cpu_has_pse boot_cpu_has(X86_FEATURE_PSE)
104 #define cpu_has_tsc boot_cpu_has(X86_FEATURE_TSC)
105 #define cpu_has_pae boot_cpu_has(X86_FEATURE_PAE)
106 #define cpu_has_pge boot_cpu_has(X86_FEATURE_PGE)
107 #define cpu_has_apic boot_cpu_has(X86_FEATURE_APIC)
108 #define cpu_has_sep boot_cpu_has(X86_FEATURE_SEP)
109 #define cpu_has_mtrr boot_cpu_has(X86_FEATURE_MTRR)
110 #define cpu_has_mmx boot_cpu_has(X86_FEATURE_MMX)
111 #define cpu_has_fxsr boot_cpu_has(X86_FEATURE_FXSR)
112 #define cpu_has_xmm boot_cpu_has(X86_FEATURE_XMM)
113 #define cpu_has_xmm2 boot_cpu_has(X86_FEATURE_XMM2)
114 #define cpu_has_xmm3 boot_cpu_has(X86_FEATURE_XMM3)
115 #define cpu_has_ht boot_cpu_has(X86_FEATURE_HT)
116 #define cpu_has_mp boot_cpu_has(X86_FEATURE_MP)
117 #define cpu_has_nx boot_cpu_has(X86_FEATURE_NX)
118 #define cpu_has_k6_mtrr boot_cpu_has(X86_FEATURE_K6_MTRR)
119 #define cpu_has_cyrix_arr boot_cpu_has(X86_FEATURE_CYRIX_ARR)
120 #define cpu_has_centaur_mcr boot_cpu_has(X86_FEATURE_CENTAUR_MCR)
121 #define cpu_has_clflush boot_cpu_has(X86_FEATURE_CLFLSH)
122 #else /* __x86_64__ */
123 #define cpu_has_vme 0
124 #define cpu_has_de 1
125 #define cpu_has_pse 1
126 #define cpu_has_tsc 1
127 #define cpu_has_pae 1
128 #define cpu_has_pge 1
129 #define cpu_has_apic boot_cpu_has(X86_FEATURE_APIC)
130 #define cpu_has_sep 0
131 #define cpu_has_mtrr 1
132 #define cpu_has_mmx 1
133 #define cpu_has_fxsr 1
134 #define cpu_has_xmm 1
135 #define cpu_has_xmm2 1
136 #define cpu_has_xmm3 boot_cpu_has(X86_FEATURE_XMM3)
137 #define cpu_has_ht boot_cpu_has(X86_FEATURE_HT)
138 #define cpu_has_mp 1
139 #define cpu_has_nx boot_cpu_has(X86_FEATURE_NX)
140 #define cpu_has_k6_mtrr 0
141 #define cpu_has_cyrix_arr 0
142 #define cpu_has_centaur_mcr 0
143 #define cpu_has_clflush boot_cpu_has(X86_FEATURE_CLFLSH)
144 #endif
146 #endif /* __ASM_I386_CPUFEATURE_H */
148 /*
149 * Local Variables:
150 * mode:c
151 * comment-column:42
152 * End:
153 */