x86/mm/pat: Don't report PAT on CPUs that don't support it
[linux/fpc-iii.git] / arch / x86 / include / asm / microcode.h
blobdaadeeea00b1ec97dd04f2eea2c9e2fab50c7086
1 #ifndef _ASM_X86_MICROCODE_H
2 #define _ASM_X86_MICROCODE_H
4 #include <asm/cpu.h>
5 #include <linux/earlycpio.h>
6 #include <linux/initrd.h>
8 #define native_rdmsr(msr, val1, val2) \
9 do { \
10 u64 __val = __rdmsr((msr)); \
11 (void)((val1) = (u32)__val); \
12 (void)((val2) = (u32)(__val >> 32)); \
13 } while (0)
15 #define native_wrmsr(msr, low, high) \
16 __wrmsr(msr, low, high)
18 #define native_wrmsrl(msr, val) \
19 __wrmsr((msr), (u32)((u64)(val)), \
20 (u32)((u64)(val) >> 32))
22 struct ucode_patch {
23 struct list_head plist;
24 void *data; /* Intel uses only this one */
25 u32 patch_id;
26 u16 equiv_cpu;
29 extern struct list_head microcode_cache;
31 struct cpu_signature {
32 unsigned int sig;
33 unsigned int pf;
34 unsigned int rev;
37 struct device;
39 enum ucode_state { UCODE_ERROR, UCODE_OK, UCODE_NFOUND };
41 struct microcode_ops {
42 enum ucode_state (*request_microcode_user) (int cpu,
43 const void __user *buf, size_t size);
45 enum ucode_state (*request_microcode_fw) (int cpu, struct device *,
46 bool refresh_fw);
48 void (*microcode_fini_cpu) (int cpu);
51 * The generic 'microcode_core' part guarantees that
52 * the callbacks below run on a target cpu when they
53 * are being called.
54 * See also the "Synchronization" section in microcode_core.c.
56 int (*apply_microcode) (int cpu);
57 int (*collect_cpu_info) (int cpu, struct cpu_signature *csig);
60 struct ucode_cpu_info {
61 struct cpu_signature cpu_sig;
62 int valid;
63 void *mc;
65 extern struct ucode_cpu_info ucode_cpu_info[];
66 struct cpio_data find_microcode_in_initrd(const char *path, bool use_pa);
68 #ifdef CONFIG_MICROCODE_INTEL
69 extern struct microcode_ops * __init init_intel_microcode(void);
70 #else
71 static inline struct microcode_ops * __init init_intel_microcode(void)
73 return NULL;
75 #endif /* CONFIG_MICROCODE_INTEL */
77 #ifdef CONFIG_MICROCODE_AMD
78 extern struct microcode_ops * __init init_amd_microcode(void);
79 extern void __exit exit_amd_microcode(void);
80 #else
81 static inline struct microcode_ops * __init init_amd_microcode(void)
83 return NULL;
85 static inline void __exit exit_amd_microcode(void) {}
86 #endif
88 #define MAX_UCODE_COUNT 128
90 #define QCHAR(a, b, c, d) ((a) + ((b) << 8) + ((c) << 16) + ((d) << 24))
91 #define CPUID_INTEL1 QCHAR('G', 'e', 'n', 'u')
92 #define CPUID_INTEL2 QCHAR('i', 'n', 'e', 'I')
93 #define CPUID_INTEL3 QCHAR('n', 't', 'e', 'l')
94 #define CPUID_AMD1 QCHAR('A', 'u', 't', 'h')
95 #define CPUID_AMD2 QCHAR('e', 'n', 't', 'i')
96 #define CPUID_AMD3 QCHAR('c', 'A', 'M', 'D')
98 #define CPUID_IS(a, b, c, ebx, ecx, edx) \
99 (!((ebx ^ (a))|(edx ^ (b))|(ecx ^ (c))))
102 * In early loading microcode phase on BSP, boot_cpu_data is not set up yet.
103 * x86_cpuid_vendor() gets vendor id for BSP.
105 * In 32 bit AP case, accessing boot_cpu_data needs linear address. To simplify
106 * coding, we still use x86_cpuid_vendor() to get vendor id for AP.
108 * x86_cpuid_vendor() gets vendor information directly from CPUID.
110 static inline int x86_cpuid_vendor(void)
112 u32 eax = 0x00000000;
113 u32 ebx, ecx = 0, edx;
115 native_cpuid(&eax, &ebx, &ecx, &edx);
117 if (CPUID_IS(CPUID_INTEL1, CPUID_INTEL2, CPUID_INTEL3, ebx, ecx, edx))
118 return X86_VENDOR_INTEL;
120 if (CPUID_IS(CPUID_AMD1, CPUID_AMD2, CPUID_AMD3, ebx, ecx, edx))
121 return X86_VENDOR_AMD;
123 return X86_VENDOR_UNKNOWN;
126 static inline unsigned int x86_cpuid_family(void)
128 u32 eax = 0x00000001;
129 u32 ebx, ecx = 0, edx;
131 native_cpuid(&eax, &ebx, &ecx, &edx);
133 return x86_family(eax);
136 #ifdef CONFIG_MICROCODE
137 int __init microcode_init(void);
138 extern void __init load_ucode_bsp(void);
139 extern void load_ucode_ap(void);
140 void reload_early_microcode(void);
141 extern bool get_builtin_firmware(struct cpio_data *cd, const char *name);
142 extern bool initrd_gone;
143 #else
144 static inline int __init microcode_init(void) { return 0; };
145 static inline void __init load_ucode_bsp(void) { }
146 static inline void load_ucode_ap(void) { }
147 static inline void reload_early_microcode(void) { }
148 static inline bool
149 get_builtin_firmware(struct cpio_data *cd, const char *name) { return false; }
150 #endif
152 #endif /* _ASM_X86_MICROCODE_H */