From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- arch/um/include/asm/mmu_context.h | 78 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 arch/um/include/asm/mmu_context.h (limited to 'arch/um/include/asm/mmu_context.h') diff --git a/arch/um/include/asm/mmu_context.h b/arch/um/include/asm/mmu_context.h new file mode 100644 index 000000000..17ddd4edf --- /dev/null +++ b/arch/um/include/asm/mmu_context.h @@ -0,0 +1,78 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) + */ + +#ifndef __UM_MMU_CONTEXT_H +#define __UM_MMU_CONTEXT_H + +#include +#include +#include + +#include + +extern void uml_setup_stubs(struct mm_struct *mm); +/* + * Needed since we do not use the asm-generic/mm_hooks.h: + */ +static inline int arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm) +{ + uml_setup_stubs(mm); + return 0; +} +extern void arch_exit_mmap(struct mm_struct *mm); +static inline void arch_unmap(struct mm_struct *mm, + unsigned long start, unsigned long end) +{ +} +static inline bool arch_vma_access_permitted(struct vm_area_struct *vma, + bool write, bool execute, bool foreign) +{ + /* by default, allow everything */ + return true; +} + +/* + * end asm-generic/mm_hooks.h functions + */ + +#define deactivate_mm(tsk,mm) do { } while (0) + +extern void force_flush_all(void); + +static inline void activate_mm(struct mm_struct *old, struct mm_struct *new) +{ + /* + * This is called by fs/exec.c and sys_unshare() + * when the new ->mm is used for the first time. + */ + __switch_mm(&new->context.id); + mmap_write_lock_nested(new, SINGLE_DEPTH_NESTING); + uml_setup_stubs(new); + mmap_write_unlock(new); +} + +static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, + struct task_struct *tsk) +{ + unsigned cpu = smp_processor_id(); + + if(prev != next){ + cpumask_clear_cpu(cpu, mm_cpumask(prev)); + cpumask_set_cpu(cpu, mm_cpumask(next)); + if(next != &init_mm) + __switch_mm(&next->context.id); + } +} + +static inline void enter_lazy_tlb(struct mm_struct *mm, + struct task_struct *tsk) +{ +} + +extern int init_new_context(struct task_struct *task, struct mm_struct *mm); + +extern void destroy_context(struct mm_struct *mm); + +#endif -- cgit v1.2.3