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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_X86_MICROCODE_INTEL_H
3#define _ASM_X86_MICROCODE_INTEL_H
4
5#include <asm/microcode.h>
6
7struct microcode_header_intel {
8 unsigned int hdrver;
9 unsigned int rev;
10 unsigned int date;
11 unsigned int sig;
12 unsigned int cksum;
13 unsigned int ldrver;
14 unsigned int pf;
15 unsigned int datasize;
16 unsigned int totalsize;
17 unsigned int metasize;
18 unsigned int reserved[2];
19};
20
21struct microcode_intel {
22 struct microcode_header_intel hdr;
23 unsigned int bits[];
24};
25
26/* microcode format is extended from prescott processors */
27struct extended_signature {
28 unsigned int sig;
29 unsigned int pf;
30 unsigned int cksum;
31};
32
33struct extended_sigtable {
34 unsigned int count;
35 unsigned int cksum;
36 unsigned int reserved[3];
37 struct extended_signature sigs[];
38};
39
40#define DEFAULT_UCODE_DATASIZE (2000)
41#define MC_HEADER_SIZE (sizeof(struct microcode_header_intel))
42#define DEFAULT_UCODE_TOTALSIZE (DEFAULT_UCODE_DATASIZE + MC_HEADER_SIZE)
43#define EXT_HEADER_SIZE (sizeof(struct extended_sigtable))
44#define EXT_SIGNATURE_SIZE (sizeof(struct extended_signature))
45#define MC_HEADER_TYPE_MICROCODE 1
46#define MC_HEADER_TYPE_IFS 2
47
48#define get_totalsize(mc) \
49 (((struct microcode_intel *)mc)->hdr.datasize ? \
50 ((struct microcode_intel *)mc)->hdr.totalsize : \
51 DEFAULT_UCODE_TOTALSIZE)
52
53#define get_datasize(mc) \
54 (((struct microcode_intel *)mc)->hdr.datasize ? \
55 ((struct microcode_intel *)mc)->hdr.datasize : DEFAULT_UCODE_DATASIZE)
56
57#define exttable_size(et) ((et)->count * EXT_SIGNATURE_SIZE + EXT_HEADER_SIZE)
58
59static inline u32 intel_get_microcode_revision(void)
60{
61 u32 rev, dummy;
62
63 native_wrmsrl(MSR_IA32_UCODE_REV, 0);
64
65 /* As documented in the SDM: Do a CPUID 1 here */
66 native_cpuid_eax(1);
67
68 /* get the current revision from MSR 0x8B */
69 native_rdmsr(MSR_IA32_UCODE_REV, dummy, rev);
70
71 return rev;
72}
73
74#ifdef CONFIG_MICROCODE_INTEL
75extern void __init load_ucode_intel_bsp(void);
76extern void load_ucode_intel_ap(void);
77extern void show_ucode_info_early(void);
78extern int __init save_microcode_in_initrd_intel(void);
79void reload_ucode_intel(void);
80#else
81static inline __init void load_ucode_intel_bsp(void) {}
82static inline void load_ucode_intel_ap(void) {}
83static inline void show_ucode_info_early(void) {}
84static inline int __init save_microcode_in_initrd_intel(void) { return -EINVAL; }
85static inline void reload_ucode_intel(void) {}
86#endif
87
88#endif /* _ASM_X86_MICROCODE_INTEL_H */