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143 lines
3.6 KiB
143 lines
3.6 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ASM_X86_MICROCODE_H |
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#define _ASM_X86_MICROCODE_H |
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#include <asm/cpu.h> |
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#include <linux/earlycpio.h> |
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#include <linux/initrd.h> |
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struct ucode_patch { |
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struct list_head plist; |
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void *data; /* Intel uses only this one */ |
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u32 patch_id; |
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u16 equiv_cpu; |
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}; |
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extern struct list_head microcode_cache; |
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struct cpu_signature { |
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unsigned int sig; |
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unsigned int pf; |
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unsigned int rev; |
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}; |
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struct device; |
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enum ucode_state { |
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UCODE_OK = 0, |
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UCODE_NEW, |
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UCODE_UPDATED, |
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UCODE_NFOUND, |
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UCODE_ERROR, |
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}; |
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struct microcode_ops { |
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enum ucode_state (*request_microcode_user) (int cpu, |
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const void __user *buf, size_t size); |
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enum ucode_state (*request_microcode_fw) (int cpu, struct device *, |
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bool refresh_fw); |
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void (*microcode_fini_cpu) (int cpu); |
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/* |
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* The generic 'microcode_core' part guarantees that |
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* the callbacks below run on a target cpu when they |
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* are being called. |
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* See also the "Synchronization" section in microcode_core.c. |
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*/ |
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enum ucode_state (*apply_microcode) (int cpu); |
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int (*collect_cpu_info) (int cpu, struct cpu_signature *csig); |
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}; |
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struct ucode_cpu_info { |
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struct cpu_signature cpu_sig; |
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int valid; |
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void *mc; |
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}; |
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extern struct ucode_cpu_info ucode_cpu_info[]; |
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struct cpio_data find_microcode_in_initrd(const char *path, bool use_pa); |
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#ifdef CONFIG_MICROCODE_INTEL |
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extern struct microcode_ops * __init init_intel_microcode(void); |
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#else |
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static inline struct microcode_ops * __init init_intel_microcode(void) |
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{ |
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return NULL; |
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} |
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#endif /* CONFIG_MICROCODE_INTEL */ |
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#ifdef CONFIG_MICROCODE_AMD |
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extern struct microcode_ops * __init init_amd_microcode(void); |
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extern void __exit exit_amd_microcode(void); |
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#else |
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static inline struct microcode_ops * __init init_amd_microcode(void) |
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{ |
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return NULL; |
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} |
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static inline void __exit exit_amd_microcode(void) {} |
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#endif |
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#define MAX_UCODE_COUNT 128 |
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#define QCHAR(a, b, c, d) ((a) + ((b) << 8) + ((c) << 16) + ((d) << 24)) |
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#define CPUID_INTEL1 QCHAR('G', 'e', 'n', 'u') |
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#define CPUID_INTEL2 QCHAR('i', 'n', 'e', 'I') |
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#define CPUID_INTEL3 QCHAR('n', 't', 'e', 'l') |
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#define CPUID_AMD1 QCHAR('A', 'u', 't', 'h') |
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#define CPUID_AMD2 QCHAR('e', 'n', 't', 'i') |
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#define CPUID_AMD3 QCHAR('c', 'A', 'M', 'D') |
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#define CPUID_IS(a, b, c, ebx, ecx, edx) \ |
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(!((ebx ^ (a))|(edx ^ (b))|(ecx ^ (c)))) |
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/* |
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* In early loading microcode phase on BSP, boot_cpu_data is not set up yet. |
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* x86_cpuid_vendor() gets vendor id for BSP. |
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* |
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* In 32 bit AP case, accessing boot_cpu_data needs linear address. To simplify |
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* coding, we still use x86_cpuid_vendor() to get vendor id for AP. |
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* |
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* x86_cpuid_vendor() gets vendor information directly from CPUID. |
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*/ |
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static inline int x86_cpuid_vendor(void) |
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{ |
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u32 eax = 0x00000000; |
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u32 ebx, ecx = 0, edx; |
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native_cpuid(&eax, &ebx, &ecx, &edx); |
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if (CPUID_IS(CPUID_INTEL1, CPUID_INTEL2, CPUID_INTEL3, ebx, ecx, edx)) |
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return X86_VENDOR_INTEL; |
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if (CPUID_IS(CPUID_AMD1, CPUID_AMD2, CPUID_AMD3, ebx, ecx, edx)) |
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return X86_VENDOR_AMD; |
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return X86_VENDOR_UNKNOWN; |
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} |
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static inline unsigned int x86_cpuid_family(void) |
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{ |
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u32 eax = 0x00000001; |
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u32 ebx, ecx = 0, edx; |
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native_cpuid(&eax, &ebx, &ecx, &edx); |
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return x86_family(eax); |
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} |
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#ifdef CONFIG_MICROCODE |
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extern void __init load_ucode_bsp(void); |
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extern void load_ucode_ap(void); |
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void reload_early_microcode(void); |
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extern bool get_builtin_firmware(struct cpio_data *cd, const char *name); |
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extern bool initrd_gone; |
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#else |
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static inline void __init load_ucode_bsp(void) { } |
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static inline void load_ucode_ap(void) { } |
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static inline void reload_early_microcode(void) { } |
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static inline bool |
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get_builtin_firmware(struct cpio_data *cd, const char *name) { return false; } |
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#endif |
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#endif /* _ASM_X86_MICROCODE_H */
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