Merge tag '4.17-SMB3-Fixes' of git://git.samba.org/sfrench/cifs-2.6

[linux-2.6-microblaze.git] / arch / sparc / include / asm / mman.h

diff --git a/arch/sparc/include/asm/mman.h b/arch/sparc/include/asm/mman.h
index 7e94721..f94532f 100644 (file)
--- a/arch/sparc/include/asm/mman.h
+++ b/arch/sparc/include/asm/mman.h
@@ -7,5 +7,87 @@
 #ifndef __ASSEMBLY__
 #define arch_mmap_check(addr,len,flags)        sparc_mmap_check(addr,len)
 int sparc_mmap_check(unsigned long addr, unsigned long len);
-#endif
+
+#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;
+       if (prot & PROT_ADI) {
+               if (!adi_capable())
+                       return 0;
+
+               if (addr) {
+                       struct vm_area_struct *vma;
+
+                       vma = find_vma(current->mm, addr);
+                       if (vma) {
+                               /* ADI can not be enabled on PFN
+                                * mapped pages
+                                */
+                               if (vma->vm_flags & (VM_PFNMAP | VM_MIXEDMAP))
+                                       return 0;
+
+                               /* 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 (vma->vm_flags & VM_MERGEABLE)
+                                       return 0;
+                       }
+               }
+       }
+       return 1;
+}
+#endif /* CONFIG_SPARC64 */
+
+#endif /* __ASSEMBLY__ */
 #endif /* __SPARC_MMAN_H__ */