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