From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg1-f198.google.com (mail-pg1-f198.google.com [209.85.215.198]) by kanga.kvack.org (Postfix) with ESMTP id 6CE7E6B0276 for ; Thu, 11 Oct 2018 11:21:01 -0400 (EDT) Received: by mail-pg1-f198.google.com with SMTP id s15-v6so6275016pgv.9 for ; Thu, 11 Oct 2018 08:21:01 -0700 (PDT) Received: from mga06.intel.com (mga06.intel.com. [134.134.136.31]) by mx.google.com with ESMTPS id y62-v6si29748088pfy.139.2018.10.11.08.21.00 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 11 Oct 2018 08:21:00 -0700 (PDT) From: Yu-cheng Yu Subject: [PATCH v5 25/27] mm/mmap: Add Shadow stack pages to memory accounting Date: Thu, 11 Oct 2018 08:15:21 -0700 Message-Id: <20181011151523.27101-26-yu-cheng.yu@intel.com> In-Reply-To: <20181011151523.27101-1-yu-cheng.yu@intel.com> References: <20181011151523.27101-1-yu-cheng.yu@intel.com> Sender: owner-linux-mm@kvack.org List-ID: To: x86@kernel.org, "H. Peter Anvin" , Thomas Gleixner , Ingo Molnar , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-api@vger.kernel.org, Arnd Bergmann , Andy Lutomirski , Balbir Singh , Cyrill Gorcunov , Dave Hansen , Eugene Syromiatnikov , Florian Weimer , "H.J. Lu" , Jann Horn , Jonathan Corbet , Kees Cook , Mike Kravetz , Nadav Amit , Oleg Nesterov , Pavel Machek , Peter Zijlstra , Randy Dunlap , "Ravi V. Shankar" , Vedvyas Shanbhogue Cc: Yu-cheng Yu Add shadow stack pages to memory accounting. Signed-off-by: Yu-cheng Yu --- mm/mmap.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/mm/mmap.c b/mm/mmap.c index b85292014ec9..fa581ced3f56 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1677,6 +1677,9 @@ 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; } @@ -3267,6 +3270,8 @@ 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); -- 2.17.1