diff mbox series

[RFC,v6,24/26] mm/mmap: Add Shadow stack pages to memory accounting

Message ID 20181119214809.6086-25-yu-cheng.yu@intel.com (mailing list archive)
State New, archived
Headers show
Series Control-flow Enforcement: Shadow Stack | expand

Commit Message

Yu-cheng Yu Nov. 19, 2018, 9:48 p.m. UTC 
Add shadow stack pages to memory accounting.

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

Patch

diff --git a/mm/mmap.c b/mm/mmap.c
index 30836512ca79..9560d69fa08c 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1701,6 +1701,9 @@  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->data_vm += npages;
 }
 
 static vm_fault_t special_mapping_fault(struct vm_fault *vmf);