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