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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cpu-info.h (3354B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
      4 */
      5#ifndef __ASM_CPU_INFO_H
      6#define __ASM_CPU_INFO_H
      7
      8#include <linux/cache.h>
      9#include <linux/types.h>
     10
     11#include <asm/loongarch.h>
     12
     13/*
     14 * Descriptor for a cache
     15 */
     16struct cache_desc {
     17	unsigned int waysize;	/* Bytes per way */
     18	unsigned short sets;	/* Number of lines per set */
     19	unsigned char ways;	/* Number of ways */
     20	unsigned char linesz;	/* Size of line in bytes */
     21	unsigned char waybit;	/* Bits to select in a cache set */
     22	unsigned char flags;	/* Flags describing cache properties */
     23};
     24
     25struct cpuinfo_loongarch {
     26	u64			asid_cache;
     27	unsigned long		asid_mask;
     28
     29	/*
     30	 * Capability and feature descriptor structure for LoongArch CPU
     31	 */
     32	unsigned long long	options;
     33	unsigned int		processor_id;
     34	unsigned int		fpu_vers;
     35	unsigned int		fpu_csr0;
     36	unsigned int		fpu_mask;
     37	unsigned int		cputype;
     38	int			isa_level;
     39	int			tlbsize;
     40	int			tlbsizemtlb;
     41	int			tlbsizestlbsets;
     42	int			tlbsizestlbways;
     43	struct cache_desc	icache; /* Primary I-cache */
     44	struct cache_desc	dcache; /* Primary D or combined I/D cache */
     45	struct cache_desc	vcache; /* Victim cache, between pcache and scache */
     46	struct cache_desc	scache; /* Secondary cache */
     47	struct cache_desc	tcache; /* Tertiary/split secondary cache */
     48	int			core;   /* physical core number in package */
     49	int			package;/* physical package number */
     50	int			vabits; /* Virtual Address size in bits */
     51	int			pabits; /* Physical Address size in bits */
     52	unsigned int		ksave_mask; /* Usable KSave mask. */
     53	unsigned int		watch_dreg_count;   /* Number data breakpoints */
     54	unsigned int		watch_ireg_count;   /* Number instruction breakpoints */
     55	unsigned int		watch_reg_use_cnt; /* min(NUM_WATCH_REGS, watch_dreg_count + watch_ireg_count), Usable by ptrace */
     56} __aligned(SMP_CACHE_BYTES);
     57
     58extern struct cpuinfo_loongarch cpu_data[];
     59#define boot_cpu_data cpu_data[0]
     60#define current_cpu_data cpu_data[smp_processor_id()]
     61#define raw_current_cpu_data cpu_data[raw_smp_processor_id()]
     62
     63extern void cpu_probe(void);
     64
     65extern const char *__cpu_family[];
     66extern const char *__cpu_full_name[];
     67#define cpu_family_string()	__cpu_family[raw_smp_processor_id()]
     68#define cpu_full_name_string()	__cpu_full_name[raw_smp_processor_id()]
     69
     70struct seq_file;
     71struct notifier_block;
     72
     73extern int register_proc_cpuinfo_notifier(struct notifier_block *nb);
     74extern int proc_cpuinfo_notifier_call_chain(unsigned long val, void *v);
     75
     76#define proc_cpuinfo_notifier(fn, pri)					\
     77({									\
     78	static struct notifier_block fn##_nb = {			\
     79		.notifier_call = fn,					\
     80		.priority = pri						\
     81	};								\
     82									\
     83	register_proc_cpuinfo_notifier(&fn##_nb);			\
     84})
     85
     86struct proc_cpuinfo_notifier_args {
     87	struct seq_file *m;
     88	unsigned long n;
     89};
     90
     91static inline bool cpus_are_siblings(int cpua, int cpub)
     92{
     93	struct cpuinfo_loongarch *infoa = &cpu_data[cpua];
     94	struct cpuinfo_loongarch *infob = &cpu_data[cpub];
     95
     96	if (infoa->package != infob->package)
     97		return false;
     98
     99	if (infoa->core != infob->core)
    100		return false;
    101
    102	return true;
    103}
    104
    105static inline unsigned long cpu_asid_mask(struct cpuinfo_loongarch *cpuinfo)
    106{
    107	return cpuinfo->asid_mask;
    108}
    109
    110static inline void set_cpu_asid_mask(struct cpuinfo_loongarch *cpuinfo,
    111				     unsigned long asid_mask)
    112{
    113	cpuinfo->asid_mask = asid_mask;
    114}
    115
    116#endif /* __ASM_CPU_INFO_H */