cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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microcode_intel.h (2519B)

      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            reserved[3];
     18};
     19
     20struct microcode_intel {
     21	struct microcode_header_intel hdr;
     22	unsigned int            bits[];
     23};
     24
     25/* microcode format is extended from prescott processors */
     26struct extended_signature {
     27	unsigned int            sig;
     28	unsigned int            pf;
     29	unsigned int            cksum;
     30};
     31
     32struct extended_sigtable {
     33	unsigned int            count;
     34	unsigned int            cksum;
     35	unsigned int            reserved[3];
     36	struct extended_signature sigs[];
     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
     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
     72extern void __init load_ucode_intel_bsp(void);
     73extern void load_ucode_intel_ap(void);
     74extern void show_ucode_info_early(void);
     75extern int __init save_microcode_in_initrd_intel(void);
     76void reload_ucode_intel(void);
     77#else
     78static inline __init void load_ucode_intel_bsp(void) {}
     79static inline void load_ucode_intel_ap(void) {}
     80static inline void show_ucode_info_early(void) {}
     81static inline int __init save_microcode_in_initrd_intel(void) { return -EINVAL; }
     82static inline void reload_ucode_intel(void) {}
     83#endif
     84
     85#endif /* _ASM_X86_MICROCODE_INTEL_H */