1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _X86_MICROCODE_INTERNAL_H 3 #define _X86_MICROCODE_INTERNAL_H 4 5 #include <linux/earlycpio.h> 6 #include <linux/initrd.h> 7 8 #include <asm/cpu.h> 9 #include <asm/microcode.h> 10 11 struct device; 12 13 enum ucode_state { 14 UCODE_OK = 0, 15 UCODE_NEW, 16 UCODE_NEW_SAFE, 17 UCODE_UPDATED, 18 UCODE_NFOUND, 19 UCODE_ERROR, 20 UCODE_TIMEOUT, 21 UCODE_OFFLINE, 22 }; 23 24 struct microcode_ops { 25 enum ucode_state (*request_microcode_fw)(int cpu, struct device *dev); 26 void (*microcode_fini_cpu)(int cpu); 27 28 /* 29 * The generic 'microcode_core' part guarantees that the callbacks 30 * below run on a target CPU when they are being called. 31 * See also the "Synchronization" section in microcode_core.c. 32 */ 33 enum ucode_state (*apply_microcode)(int cpu); 34 void (*stage_microcode)(void); 35 int (*collect_cpu_info)(int cpu, struct cpu_signature *csig); 36 void (*finalize_late_load)(int result); 37 unsigned int nmi_safe : 1, 38 use_nmi : 1, 39 use_staging : 1; 40 }; 41 42 struct early_load_data { 43 u32 old_rev; 44 u32 new_rev; 45 }; 46 47 extern struct early_load_data early_data; 48 extern struct ucode_cpu_info ucode_cpu_info[]; 49 extern u32 microcode_rev[NR_CPUS]; 50 extern u32 base_rev; 51 52 struct cpio_data find_microcode_in_initrd(const char *path); 53 54 #define MAX_UCODE_COUNT 128 55 56 #define QCHAR(a, b, c, d) ((a) + ((b) << 8) + ((c) << 16) + ((d) << 24)) 57 #define CPUID_INTEL1 QCHAR('G', 'e', 'n', 'u') 58 #define CPUID_INTEL2 QCHAR('i', 'n', 'e', 'I') 59 #define CPUID_INTEL3 QCHAR('n', 't', 'e', 'l') 60 #define CPUID_AMD1 QCHAR('A', 'u', 't', 'h') 61 #define CPUID_AMD2 QCHAR('e', 'n', 't', 'i') 62 #define CPUID_AMD3 QCHAR('c', 'A', 'M', 'D') 63 64 #define CPUID_IS(a, b, c, ebx, ecx, edx) \ 65 (!(((ebx) ^ (a)) | ((edx) ^ (b)) | ((ecx) ^ (c)))) 66 67 /* 68 * In early loading microcode phase on BSP, boot_cpu_data is not set up yet. 69 * x86_cpuid_vendor() gets vendor id for BSP. 70 * 71 * In 32 bit AP case, accessing boot_cpu_data needs linear address. To simplify 72 * coding, we still use x86_cpuid_vendor() to get vendor id for AP. 73 * 74 * x86_cpuid_vendor() gets vendor information directly from CPUID. 75 */ 76 static inline int x86_cpuid_vendor(void) 77 { 78 u32 eax = 0x00000000; 79 u32 ebx, ecx = 0, edx; 80 81 native_cpuid(&eax, &ebx, &ecx, &edx); 82 83 if (CPUID_IS(CPUID_INTEL1, CPUID_INTEL2, CPUID_INTEL3, ebx, ecx, edx)) 84 return X86_VENDOR_INTEL; 85 86 if (CPUID_IS(CPUID_AMD1, CPUID_AMD2, CPUID_AMD3, ebx, ecx, edx)) 87 return X86_VENDOR_AMD; 88 89 return X86_VENDOR_UNKNOWN; 90 } 91 92 static inline unsigned int x86_cpuid_family(void) 93 { 94 u32 eax = 0x00000001; 95 u32 ebx, ecx = 0, edx; 96 97 native_cpuid(&eax, &ebx, &ecx, &edx); 98 99 return x86_family(eax); 100 } 101 102 extern bool force_minrev; 103 104 #ifdef CONFIG_CPU_SUP_AMD 105 void load_ucode_amd_bsp(struct early_load_data *ed, unsigned int family); 106 void load_ucode_amd_ap(unsigned int family); 107 void reload_ucode_amd(unsigned int cpu); 108 struct microcode_ops *init_amd_microcode(void); 109 void exit_amd_microcode(void); 110 #else /* CONFIG_CPU_SUP_AMD */ 111 static inline void load_ucode_amd_bsp(struct early_load_data *ed, unsigned int family) { } 112 static inline void load_ucode_amd_ap(unsigned int family) { } 113 static inline void reload_ucode_amd(unsigned int cpu) { } 114 static inline struct microcode_ops *init_amd_microcode(void) { return NULL; } 115 static inline void exit_amd_microcode(void) { } 116 #endif /* !CONFIG_CPU_SUP_AMD */ 117 118 #ifdef CONFIG_CPU_SUP_INTEL 119 void load_ucode_intel_bsp(struct early_load_data *ed); 120 void load_ucode_intel_ap(void); 121 void reload_ucode_intel(void); 122 struct microcode_ops *init_intel_microcode(void); 123 #else /* CONFIG_CPU_SUP_INTEL */ 124 static inline void load_ucode_intel_bsp(struct early_load_data *ed) { } 125 static inline void load_ucode_intel_ap(void) { } 126 static inline void reload_ucode_intel(void) { } 127 static inline struct microcode_ops *init_intel_microcode(void) { return NULL; } 128 #endif /* !CONFIG_CPU_SUP_INTEL */ 129 130 #define ucode_dbg(fmt, ...) \ 131 ({ \ 132 if (IS_ENABLED(CONFIG_MICROCODE_DBG)) \ 133 pr_info(fmt, ##__VA_ARGS__); \ 134 }) 135 136 #endif /* _X86_MICROCODE_INTERNAL_H */ 137