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 int (*collect_cpu_info)(int cpu, struct cpu_signature *csig); 35 void (*finalize_late_load)(int result); 36 unsigned int nmi_safe : 1, 37 use_nmi : 1; 38 }; 39 40 struct early_load_data { 41 u32 old_rev; 42 u32 new_rev; 43 }; 44 45 extern struct early_load_data early_data; 46 extern struct ucode_cpu_info ucode_cpu_info[]; 47 struct cpio_data find_microcode_in_initrd(const char *path); 48 49 #define MAX_UCODE_COUNT 128 50 51 #define QCHAR(a, b, c, d) ((a) + ((b) << 8) + ((c) << 16) + ((d) << 24)) 52 #define CPUID_INTEL1 QCHAR('G', 'e', 'n', 'u') 53 #define CPUID_INTEL2 QCHAR('i', 'n', 'e', 'I') 54 #define CPUID_INTEL3 QCHAR('n', 't', 'e', 'l') 55 #define CPUID_AMD1 QCHAR('A', 'u', 't', 'h') 56 #define CPUID_AMD2 QCHAR('e', 'n', 't', 'i') 57 #define CPUID_AMD3 QCHAR('c', 'A', 'M', 'D') 58 59 #define CPUID_IS(a, b, c, ebx, ecx, edx) \ 60 (!(((ebx) ^ (a)) | ((edx) ^ (b)) | ((ecx) ^ (c)))) 61 62 /* 63 * In early loading microcode phase on BSP, boot_cpu_data is not set up yet. 64 * x86_cpuid_vendor() gets vendor id for BSP. 65 * 66 * In 32 bit AP case, accessing boot_cpu_data needs linear address. To simplify 67 * coding, we still use x86_cpuid_vendor() to get vendor id for AP. 68 * 69 * x86_cpuid_vendor() gets vendor information directly from CPUID. 70 */ 71 static inline int x86_cpuid_vendor(void) 72 { 73 u32 eax = 0x00000000; 74 u32 ebx, ecx = 0, edx; 75 76 native_cpuid(&eax, &ebx, &ecx, &edx); 77 78 if (CPUID_IS(CPUID_INTEL1, CPUID_INTEL2, CPUID_INTEL3, ebx, ecx, edx)) 79 return X86_VENDOR_INTEL; 80 81 if (CPUID_IS(CPUID_AMD1, CPUID_AMD2, CPUID_AMD3, ebx, ecx, edx)) 82 return X86_VENDOR_AMD; 83 84 return X86_VENDOR_UNKNOWN; 85 } 86 87 static inline unsigned int x86_cpuid_family(void) 88 { 89 u32 eax = 0x00000001; 90 u32 ebx, ecx = 0, edx; 91 92 native_cpuid(&eax, &ebx, &ecx, &edx); 93 94 return x86_family(eax); 95 } 96 97 extern bool dis_ucode_ldr; 98 extern bool force_minrev; 99 100 #ifdef CONFIG_CPU_SUP_AMD 101 void load_ucode_amd_bsp(struct early_load_data *ed, unsigned int family); 102 void load_ucode_amd_ap(unsigned int family); 103 int save_microcode_in_initrd_amd(unsigned int family); 104 void reload_ucode_amd(unsigned int cpu); 105 struct microcode_ops *init_amd_microcode(void); 106 void exit_amd_microcode(void); 107 #else /* CONFIG_CPU_SUP_AMD */ 108 static inline void load_ucode_amd_bsp(struct early_load_data *ed, unsigned int family) { } 109 static inline void load_ucode_amd_ap(unsigned int family) { } 110 static inline int save_microcode_in_initrd_amd(unsigned int family) { return -EINVAL; } 111 static inline void reload_ucode_amd(unsigned int cpu) { } 112 static inline struct microcode_ops *init_amd_microcode(void) { return NULL; } 113 static inline void exit_amd_microcode(void) { } 114 #endif /* !CONFIG_CPU_SUP_AMD */ 115 116 #ifdef CONFIG_CPU_SUP_INTEL 117 void load_ucode_intel_bsp(struct early_load_data *ed); 118 void load_ucode_intel_ap(void); 119 void reload_ucode_intel(void); 120 struct microcode_ops *init_intel_microcode(void); 121 #else /* CONFIG_CPU_SUP_INTEL */ 122 static inline void load_ucode_intel_bsp(struct early_load_data *ed) { } 123 static inline void load_ucode_intel_ap(void) { } 124 static inline void reload_ucode_intel(void) { } 125 static inline struct microcode_ops *init_intel_microcode(void) { return NULL; } 126 #endif /* !CONFIG_CPU_SUP_INTEL */ 127 128 #endif /* _X86_MICROCODE_INTERNAL_H */ 129