1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _ASM_X86_MICROCODE_H |
3 | #define _ASM_X86_MICROCODE_H |
4 | |
5 | struct cpu_signature { |
6 | unsigned int sig; |
7 | unsigned int pf; |
8 | unsigned int rev; |
9 | }; |
10 | |
11 | struct ucode_cpu_info { |
12 | struct cpu_signature cpu_sig; |
13 | void *mc; |
14 | }; |
15 | |
16 | #ifdef CONFIG_MICROCODE |
17 | void load_ucode_bsp(void); |
18 | void load_ucode_ap(void); |
19 | void microcode_bsp_resume(void); |
20 | #else |
21 | static inline void load_ucode_bsp(void) { } |
22 | static inline void load_ucode_ap(void) { } |
23 | static inline void microcode_bsp_resume(void) { } |
24 | #endif |
25 | |
26 | extern unsigned long initrd_start_early; |
27 | |
28 | #ifdef CONFIG_CPU_SUP_INTEL |
29 | /* Intel specific microcode defines. Public for IFS */ |
30 | struct { |
31 | unsigned int ; |
32 | unsigned int ; |
33 | unsigned int ; |
34 | unsigned int ; |
35 | unsigned int ; |
36 | unsigned int ; |
37 | unsigned int ; |
38 | unsigned int ; |
39 | unsigned int ; |
40 | unsigned int ; |
41 | unsigned int ; |
42 | unsigned int ; |
43 | }; |
44 | |
45 | struct microcode_intel { |
46 | struct microcode_header_intel hdr; |
47 | unsigned int bits[]; |
48 | }; |
49 | |
50 | #define DEFAULT_UCODE_DATASIZE (2000) |
51 | #define (sizeof(struct microcode_header_intel)) |
52 | #define 1 |
53 | #define 2 |
54 | |
55 | static inline int intel_microcode_get_datasize(struct microcode_header_intel *hdr) |
56 | { |
57 | return hdr->datasize ? : DEFAULT_UCODE_DATASIZE; |
58 | } |
59 | |
60 | static inline u32 intel_get_microcode_revision(void) |
61 | { |
62 | u32 rev, dummy; |
63 | |
64 | native_wrmsrl(MSR_IA32_UCODE_REV, 0); |
65 | |
66 | /* As documented in the SDM: Do a CPUID 1 here */ |
67 | native_cpuid_eax(op: 1); |
68 | |
69 | /* get the current revision from MSR 0x8B */ |
70 | native_rdmsr(MSR_IA32_UCODE_REV, dummy, rev); |
71 | |
72 | return rev; |
73 | } |
74 | #endif /* !CONFIG_CPU_SUP_INTEL */ |
75 | |
76 | bool microcode_nmi_handler(void); |
77 | void microcode_offline_nmi_handler(void); |
78 | |
79 | #ifdef CONFIG_MICROCODE_LATE_LOADING |
80 | DECLARE_STATIC_KEY_FALSE(microcode_nmi_handler_enable); |
81 | static __always_inline bool microcode_nmi_handler_enabled(void) |
82 | { |
83 | return static_branch_unlikely(µcode_nmi_handler_enable); |
84 | } |
85 | #else |
86 | static __always_inline bool microcode_nmi_handler_enabled(void) { return false; } |
87 | #endif |
88 | |
89 | #endif /* _ASM_X86_MICROCODE_H */ |
90 | |