diff options
Diffstat (limited to 'arch/arm64/include/asm/mmu_context.h')
| -rw-r--r-- | arch/arm64/include/asm/mmu_context.h | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/mmu_context.h b/arch/arm64/include/asm/mmu_context.h index c768d16b81a4..f0fe2d09d139 100644 --- a/arch/arm64/include/asm/mmu_context.h +++ b/arch/arm64/include/asm/mmu_context.h @@ -20,13 +20,41 @@ #include <asm/cpufeature.h> #include <asm/daifflags.h> #include <asm/proc-fns.h> -#include <asm-generic/mm_hooks.h> #include <asm/cputype.h> #include <asm/sysreg.h> #include <asm/tlbflush.h> extern bool rodata_full; +static inline int arch_dup_mmap(struct mm_struct *oldmm, + struct mm_struct *mm) +{ + return 0; +} + +static inline 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) +{ + if (IS_ENABLED(CONFIG_ARM64_WXN) && execute && + (vma->vm_flags & (VM_WRITE | VM_EXEC)) == (VM_WRITE | VM_EXEC)) { + pr_warn_ratelimited( + "process %s (%d) attempted to execute from writable memory\n", + current->comm, current->pid); + /* disallow unless the nowxn override is set */ + return !arm64_wxn_enabled(); + } + return true; +} + static inline void contextidr_thread_switch(struct task_struct *next) { if (!IS_ENABLED(CONFIG_PID_IN_CONTEXTIDR)) |