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 */ 147