[PATCH v8 25/27] mm/mmap: Add Shadow stack pages to memory accounting

[Yu-cheng Yu]

Add shadow stack pages to memory accounting.

Signed-off-by: Yu-cheng Yu <yu-cheng...@intel.com>
---
 mm/mmap.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/mm/mmap.c b/mm/mmap.c
index b1a921c0de63..1acded00f003 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1703,6 +1703,9 @@ static inline int accountable_mapping(struct file *file, 
vm_flags_t vm_flags)
        if (file && is_file_hugepages(file))
                return 0;
 
+       if (arch_copy_pte_mapping(vm_flags))
+               return 1;
+
        return (vm_flags & (VM_NORESERVE | VM_SHARED | VM_WRITE)) == VM_WRITE;
 }
 
@@ -3319,6 +3322,8 @@ void vm_stat_account(struct mm_struct *mm, vm_flags_t 
flags, long npages)
                mm->stack_vm += npages;
        else if (is_data_mapping(flags))
                mm->data_vm += npages;
+       else if (arch_copy_pte_mapping(flags))
+               mm->stack_vm += npages;
 }
 
 static vm_fault_t special_mapping_fault(struct vm_fault *vmf);
-- 
2.17.1