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 extern bool hypervisor_present; 52 53 struct cpio_data find_microcode_in_initrd(const char *path); 54 55 #define MAX_UCODE_COUNT 128 56 57 #define QCHAR(a, b, c, d) ((a) + ((b) << 8) + ((c) << 16) + ((d) << 24)) 58 #define CPUID_INTEL1 QCHAR('G', 'e', 'n', 'u') 59 #define CPUID_INTEL2 QCHAR('i', 'n', 'e', 'I') 60 #define CPUID_INTEL3 QCHAR('n', 't', 'e', 'l') 61 #define CPUID_AMD1 QCHAR('A', 'u', 't', 'h') 62 #define CPUID_AMD2 QCHAR('e', 'n', 't', 'i') 63 #define CPUID_AMD3 QCHAR('c', 'A', 'M', 'D') 64 65 #define CPUID_IS(a, b, c, ebx, ecx, edx) \ 66 (!(((ebx) ^ (a)) | ((edx) ^ (b)) | ((ecx) ^ (c)))) 67 68 /* 69 * In early loading microcode phase on BSP, boot_cpu_data is not set up yet. 70 * x86_cpuid_vendor() gets vendor id for BSP. 71 * 72 * In 32 bit AP case, accessing boot_cpu_data needs linear address. To simplify 73 * coding, we still use x86_cpuid_vendor() to get vendor id for AP. 74 * 75 * x86_cpuid_vendor() gets vendor information directly from CPUID. 76 */ 77 static inline int x86_cpuid_vendor(void) 78 { 79 u32 eax = 0x00000000; 80 u32 ebx, ecx = 0, edx; 81 82 native_cpuid(&eax, &ebx, &ecx, &edx); 83 84 if (CPUID_IS(CPUID_INTEL1, CPUID_INTEL2, CPUID_INTEL3, ebx, ecx, edx)) 85 return X86_VENDOR_INTEL; 86 87 if (CPUID_IS(CPUID_AMD1, CPUID_AMD2, CPUID_AMD3, ebx, ecx, edx)) 88 return X86_VENDOR_AMD; 89 90 return X86_VENDOR_UNKNOWN; 91 } 92 93 static inline unsigned int x86_cpuid_family(void) 94 { 95 u32 eax = 0x00000001; 96 u32 ebx, ecx = 0, edx; 97 98 native_cpuid(&eax, &ebx, &ecx, &edx); 99 100 return x86_family(eax); 101 } 102 103 extern bool force_minrev; 104 105 #ifdef CONFIG_CPU_SUP_AMD 106 void load_ucode_amd_bsp(struct early_load_data *ed, unsigned int family); 107 void load_ucode_amd_ap(unsigned int family); 108 void reload_ucode_amd(unsigned int cpu); 109 struct microcode_ops *init_amd_microcode(void); 110 void exit_amd_microcode(void); 111 #else /* CONFIG_CPU_SUP_AMD */ 112 static inline void load_ucode_amd_bsp(struct early_load_data *ed, unsigned int family) { } 113 static inline void load_ucode_amd_ap(unsigned int family) { } 114 static inline void reload_ucode_amd(unsigned int cpu) { } 115 static inline struct microcode_ops *init_amd_microcode(void) { return NULL; } 116 static inline void exit_amd_microcode(void) { } 117 #endif /* !CONFIG_CPU_SUP_AMD */ 118 119 #ifdef CONFIG_CPU_SUP_INTEL 120 void load_ucode_intel_bsp(struct early_load_data *ed); 121 void load_ucode_intel_ap(void); 122 void reload_ucode_intel(void); 123 struct microcode_ops *init_intel_microcode(void); 124 #else /* CONFIG_CPU_SUP_INTEL */ 125 static inline void load_ucode_intel_bsp(struct early_load_data *ed) { } 126 static inline void load_ucode_intel_ap(void) { } 127 static inline void reload_ucode_intel(void) { } 128 static inline struct microcode_ops *init_intel_microcode(void) { return NULL; } 129 #endif /* !CONFIG_CPU_SUP_INTEL */ 130 131 #define ucode_dbg(fmt, ...) \ 132 ({ \ 133 if (IS_ENABLED(CONFIG_MICROCODE_DBG)) \ 134 pr_info(fmt, ##__VA_ARGS__); \ 135 }) 136 137 #endif /* _X86_MICROCODE_INTERNAL_H */ 138