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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mmu_context.h (959B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2
      3#ifndef __ASM_CSKY_MMU_CONTEXT_H
      4#define __ASM_CSKY_MMU_CONTEXT_H
      5
      6#include <asm-generic/mm_hooks.h>
      7#include <asm/setup.h>
      8#include <asm/page.h>
      9#include <asm/cacheflush.h>
     10#include <asm/tlbflush.h>
     11
     12#include <linux/errno.h>
     13#include <linux/sched.h>
     14#include <abi/ckmmu.h>
     15
     16#define ASID_MASK		((1 << CONFIG_CPU_ASID_BITS) - 1)
     17#define cpu_asid(mm)		(atomic64_read(&mm->context.asid) & ASID_MASK)
     18
     19#define init_new_context(tsk,mm)	({ atomic64_set(&(mm)->context.asid, 0); 0; })
     20
     21void check_and_switch_context(struct mm_struct *mm, unsigned int cpu);
     22
     23static inline void
     24switch_mm(struct mm_struct *prev, struct mm_struct *next,
     25	  struct task_struct *tsk)
     26{
     27	unsigned int cpu = smp_processor_id();
     28
     29	if (prev != next)
     30		check_and_switch_context(next, cpu);
     31
     32	setup_pgd(next->pgd, next->context.asid.counter);
     33
     34	flush_icache_deferred(next);
     35}
     36
     37#include <asm-generic/mmu_context.h>
     38
     39#endif /* __ASM_CSKY_MMU_CONTEXT_H */