arch/x86/include/asm/microcode.h

   1 #ifndef _ASM_X86_MICROCODE_H
   2 #define _ASM_X86_MICROCODE_H
   3
   4 #include <asm/cpu.h>
   5 #include <linux/earlycpio.h>
   6
   7 #define native_rdmsr(msr, val1, val2)                   \
   8 do {                                                    \
   9         u64 __val = native_read_msr((msr));             \
  10         (void)((val1) = (u32)__val);                    \
  11         (void)((val2) = (u32)(__val >> 32));            \
  12 } while (0)
  13
  14 #define native_wrmsr(msr, low, high)                    \
  15         native_write_msr(msr, low, high)
  16
  17 #define native_wrmsrl(msr, val)                         \
  18         native_write_msr((msr),                         \
  19                          (u32)((u64)(val)),             \
  20                          (u32)((u64)(val) >> 32))
  21
  22 struct cpu_signature {
  23         unsigned int sig;
  24         unsigned int pf;
  25         unsigned int rev;
  26 };
  27
  28 struct device;
  29
  30 enum ucode_state { UCODE_ERROR, UCODE_OK, UCODE_NFOUND };
  31
  32 struct microcode_ops {
  33         enum ucode_state (*request_microcode_user) (int cpu,
  34                                 const void __user *buf, size_t size);
  35
  36         enum ucode_state (*request_microcode_fw) (int cpu, struct device *,
  37                                                   bool refresh_fw);
  38
  39         void (*microcode_fini_cpu) (int cpu);
  40
  41         /*
  42          * The generic 'microcode_core' part guarantees that
  43          * the callbacks below run on a target cpu when they
  44          * are being called.
  45          * See also the "Synchronization" section in microcode_core.c.
  46          */
  47         int (*apply_microcode) (int cpu);
  48         int (*collect_cpu_info) (int cpu, struct cpu_signature *csig);
  49 };
  50
  51 struct ucode_cpu_info {
  52         struct cpu_signature    cpu_sig;
  53         int                     valid;
  54         void                    *mc;
  55 };
  56 extern struct ucode_cpu_info ucode_cpu_info[];
  57
  58 #ifdef CONFIG_MICROCODE
  59 int __init microcode_init(void);
  60 #else
  61 static inline int __init microcode_init(void)   { return 0; };
  62 #endif
  63
  64 #ifdef CONFIG_MICROCODE_INTEL
  65 extern struct microcode_ops * __init init_intel_microcode(void);
  66 #else
  67 static inline struct microcode_ops * __init init_intel_microcode(void)
  68 {
  69         return NULL;
  70 }
  71 #endif /* CONFIG_MICROCODE_INTEL */
  72
  73 #ifdef CONFIG_MICROCODE_AMD
  74 extern struct microcode_ops * __init init_amd_microcode(void);
  75 extern void __exit exit_amd_microcode(void);
  76 #else
  77 static inline struct microcode_ops * __init init_amd_microcode(void)
  78 {
  79         return NULL;
  80 }
  81 static inline void __exit exit_amd_microcode(void) {}
  82 #endif
  83
  84 #define MAX_UCODE_COUNT 128
  85
  86 #define QCHAR(a, b, c, d) ((a) + ((b) << 8) + ((c) << 16) + ((d) << 24))
  87 #define CPUID_INTEL1 QCHAR('G', 'e', 'n', 'u')
  88 #define CPUID_INTEL2 QCHAR('i', 'n', 'e', 'I')
  89 #define CPUID_INTEL3 QCHAR('n', 't', 'e', 'l')
  90 #define CPUID_AMD1 QCHAR('A', 'u', 't', 'h')
  91 #define CPUID_AMD2 QCHAR('e', 'n', 't', 'i')
  92 #define CPUID_AMD3 QCHAR('c', 'A', 'M', 'D')
  93
  94 #define CPUID_IS(a, b, c, ebx, ecx, edx)        \
  95                 (!((ebx ^ (a))|(edx ^ (b))|(ecx ^ (c))))
  96
  97 /*
  98  * In early loading microcode phase on BSP, boot_cpu_data is not set up yet.
  99  * x86_cpuid_vendor() gets vendor id for BSP.
 100  *
 101  * In 32 bit AP case, accessing boot_cpu_data needs linear address. To simplify
 102  * coding, we still use x86_cpuid_vendor() to get vendor id for AP.
 103  *
 104  * x86_cpuid_vendor() gets vendor information directly from CPUID.
 105  */
 106 static inline int x86_cpuid_vendor(void)
 107 {
 108         u32 eax = 0x00000000;
 109         u32 ebx, ecx = 0, edx;
 110
 111         native_cpuid(&eax, &ebx, &ecx, &edx);
 112
 113         if (CPUID_IS(CPUID_INTEL1, CPUID_INTEL2, CPUID_INTEL3, ebx, ecx, edx))
 114                 return X86_VENDOR_INTEL;
 115
 116         if (CPUID_IS(CPUID_AMD1, CPUID_AMD2, CPUID_AMD3, ebx, ecx, edx))
 117                 return X86_VENDOR_AMD;
 118
 119         return X86_VENDOR_UNKNOWN;
 120 }
 121
 122 static inline unsigned int x86_cpuid_family(void)
 123 {
 124         u32 eax = 0x00000001;
 125         u32 ebx, ecx = 0, edx;
 126
 127         native_cpuid(&eax, &ebx, &ecx, &edx);
 128
 129         return x86_family(eax);
 130 }
 131
 132 #ifdef CONFIG_MICROCODE
 133 extern void __init load_ucode_bsp(void);
 134 extern void load_ucode_ap(void);
 135 extern int __init save_microcode_in_initrd(void);
 136 void reload_early_microcode(void);
 137 extern bool get_builtin_firmware(struct cpio_data *cd, const char *name);
 138 #else
 139 static inline void __init load_ucode_bsp(void)                  { }
 140 static inline void load_ucode_ap(void)                          { }
 141 static inline int __init save_microcode_in_initrd(void)         { return 0; }
 142 static inline void reload_early_microcode(void)                 { }
 143 static inline bool
 144 get_builtin_firmware(struct cpio_data *cd, const char *name)    { return false; }
 145 #endif
 146 #endif /* _ASM_X86_MICROCODE_H */