From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yu-cheng Yu Subject: [RFC PATCH v6 24/26] mm/mmap: Add Shadow stack pages to memory accounting Date: Mon, 19 Nov 2018 13:48:07 -0800 Message-ID: <20181119214809.6086-25-yu-cheng.yu@intel.com> References: <20181119214809.6086-1-yu-cheng.yu@intel.com> Return-path: In-Reply-To: <20181119214809.6086-1-yu-cheng.yu@intel.com> Sender: linux-kernel-owner@vger.kernel.org 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 , Pa Cc: Yu-cheng Yu List-Id: linux-arch.vger.kernel.org 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 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); -- 2.17.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga09.intel.com ([134.134.136.24]:32103 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731607AbeKTIUN (ORCPT ); Tue, 20 Nov 2018 03:20:13 -0500 From: Yu-cheng Yu Subject: [RFC PATCH v6 24/26] mm/mmap: Add Shadow stack pages to memory accounting Date: Mon, 19 Nov 2018 13:48:07 -0800 Message-ID: <20181119214809.6086-25-yu-cheng.yu@intel.com> In-Reply-To: <20181119214809.6086-1-yu-cheng.yu@intel.com> References: <20181119214809.6086-1-yu-cheng.yu@intel.com> Sender: linux-arch-owner@vger.kernel.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 Message-ID: <20181119214807.cmEyNpmdh9992sgOx5AS3UVre8Sfai5EqeEw9EXOgBk@z> 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 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); -- 2.17.1