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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __SPARC_MMAN_H__ #define __SPARC_MMAN_H__ #include <uapi/asm/mman.h> #ifndef __ASSEMBLY__ #define arch_mmap_check(addr,len,flags) sparc_mmap_check(addr,len) int sparc_mmap_check(unsigned long addr, unsigned long len); #ifdef CONFIG_SPARC64 #include <asm/adi_64.h> static inline void ipi_set_tstate_mcde(void *arg) { struct mm_struct *mm = arg; /* Set TSTATE_MCDE for the task using address map that ADI has been * enabled on if the task is running. If not, it will be set * automatically at the next context switch */ if (current->mm == mm) { struct pt_regs *regs; regs = task_pt_regs(current); regs->tstate |= TSTATE_MCDE; } } #define arch_calc_vm_prot_bits(prot, pkey) sparc_calc_vm_prot_bits(prot) static inline unsigned long sparc_calc_vm_prot_bits(unsigned long prot) { if (adi_capable() && (prot & PROT_ADI)) { struct pt_regs *regs; if (!current->mm->context.adi) { regs = task_pt_regs(current); regs->tstate |= TSTATE_MCDE; current->mm->context.adi = true; on_each_cpu_mask(mm_cpumask(current->mm), ipi_set_tstate_mcde, current->mm, 0); } return VM_SPARC_ADI; } else { return 0; } } #define arch_vm_get_page_prot(vm_flags) sparc_vm_get_page_prot(vm_flags) static inline pgprot_t sparc_vm_get_page_prot(unsigned long vm_flags) { return (vm_flags & VM_SPARC_ADI) ? __pgprot(_PAGE_MCD_4V) : __pgprot(0); } #define arch_validate_prot(prot, addr) sparc_validate_prot(prot, addr) static inline int sparc_validate_prot(unsigned long prot, unsigned long addr) { if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_ADI)) return 0; return 1; } #define arch_validate_flags(vm_flags) arch_validate_flags(vm_flags) /* arch_validate_flags() - Ensure combination of flags is valid for a * VMA. */ static inline bool arch_validate_flags(unsigned long vm_flags) { /* If ADI is being enabled on this VMA, check for ADI * capability on the platform and ensure VMA is suitable * for ADI */ if (vm_flags & VM_SPARC_ADI) { if (!adi_capable()) return false; /* ADI can not be enabled on PFN mapped pages */ if (vm_flags & (VM_PFNMAP | VM_MIXEDMAP)) return false; /* Mergeable pages can become unmergeable * if ADI is enabled on them even if they * have identical data on them. This can be * because ADI enabled pages with identical * data may still not have identical ADI * tags on them. Disallow ADI on mergeable * pages. */ if (vm_flags & VM_MERGEABLE) return false; } return true; } #endif /* CONFIG_SPARC64 */ #endif /* __ASSEMBLY__ */ #endif /* __SPARC_MMAN_H__ */
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