From: Yu-cheng Yu <yu-cheng.yu@intel.com>
To: x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
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 <arnd@arndb.de>,
Andy Lutomirski <luto@kernel.org>,
Balbir Singh <bsingharora@gmail.com>,
Borislav Petkov <bp@alien8.de>,
Cyrill Gorcunov <gorcunov@gmail.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Eugene Syromiatnikov <esyr@redhat.com>,
Florian Weimer <fweimer@redhat.com>,
"H.J. Lu" <hjl.tools@gmail.com>, Jann Horn <jannh@google.com>,
Jonathan Corbet <corbet@lwn.net>,
Kees Cook <keescook@chromium.org>,
Mike Kravetz <mike.kravetz@oracle.com>,
Nadav Amit <nadav.amit@gmail.com>,
Oleg Nesterov <oleg@redhat.com>, Pavel Machek <pavel@ucw.cz>,
Peter Zijlstra <peterz@infradead.org>,
Randy Dunlap <rdunlap@infradead.org>,
"Ravi V. Shankar" <ravi.v.shankar@intel.com>,
Vedvyas Shanbhogue <vedvyas.shanbhogue@intel.com>,
Dave Martin <Dave.Martin@arm.com>,
Weijiang Yang <weijiang.yang@intel.com>,
Pengfei Xu <pengfei.xu@intel.com>
Cc: Yu-cheng Yu <yu-cheng.yu@intel.com>
Subject: [PATCH v13 17/26] mm/mmap: Add shadow stack pages to memory accounting
Date: Fri, 25 Sep 2020 07:56:40 -0700 [thread overview]
Message-ID: <20200925145649.5438-18-yu-cheng.yu@intel.com> (raw)
In-Reply-To: <20200925145649.5438-1-yu-cheng.yu@intel.com>
Account shadow stack pages to stack memory.
Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com>
---
v10:
- Use arch_shadow_stack_mapping() to make meaning clear.
v8:
- Change shadow stake pages from data_vm to stack_vm.
arch/x86/mm/pgtable.c | 7 +++++++
include/linux/pgtable.h | 11 +++++++++++
mm/mmap.c | 5 +++++
3 files changed, 23 insertions(+)
diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index a9666b64bc05..68e98f70298b 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -893,3 +893,10 @@ int pmd_free_pte_page(pmd_t *pmd, unsigned long addr)
#endif /* CONFIG_X86_64 */
#endif /* CONFIG_HAVE_ARCH_HUGE_VMAP */
+
+#ifdef CONFIG_ARCH_HAS_SHADOW_STACK
+bool arch_shadow_stack_mapping(vm_flags_t vm_flags)
+{
+ return (vm_flags & VM_SHSTK);
+}
+#endif
diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h
index a665fc8c0eaf..dc3511316718 100644
--- a/include/linux/pgtable.h
+++ b/include/linux/pgtable.h
@@ -1380,6 +1380,17 @@ static inline pmd_t arch_maybe_pmd_mkwrite(pmd_t pmd, struct vm_area_struct *vma
#endif /* CONFIG_ARCH_MAYBE_MKWRITE */
#endif /* CONFIG_MMU */
+#ifdef CONFIG_MMU
+#ifdef CONFIG_ARCH_HAS_SHADOW_STACK
+bool arch_shadow_stack_mapping(vm_flags_t vm_flags);
+#else
+static inline bool arch_shadow_stack_mapping(vm_flags_t vm_flags)
+{
+ return false;
+}
+#endif /* CONFIG_ARCH_HAS_SHADOW_STACK */
+#endif /* CONFIG_MMU */
+
/*
* Architecture PAGE_KERNEL_* fallbacks
*
diff --git a/mm/mmap.c b/mm/mmap.c
index 40248d84ad5f..574b3f273462 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1682,6 +1682,9 @@ static inline int accountable_mapping(struct file *file, vm_flags_t vm_flags)
if (file && is_file_hugepages(file))
return 0;
+ if (arch_shadow_stack_mapping(vm_flags))
+ return 1;
+
return (vm_flags & (VM_NORESERVE | VM_SHARED | VM_WRITE)) == VM_WRITE;
}
@@ -3352,6 +3355,8 @@ 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_shadow_stack_mapping(flags))
+ mm->stack_vm += npages;
}
static vm_fault_t special_mapping_fault(struct vm_fault *vmf);
--
2.21.0
next prev parent reply other threads:[~2020-09-25 15:07 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200925145649.5438-1-yu-cheng.yu@intel.com>
2020-09-25 14:56 ` [PATCH v13 01/26] Documentation/x86: Add CET description Yu-cheng Yu
2020-09-25 14:56 ` [PATCH v13 02/26] x86/cpufeatures: Add CET CPU feature flags for Control-flow Enforcement Technology (CET) Yu-cheng Yu
2020-09-25 14:56 ` [PATCH v13 03/26] x86/fpu/xstate: Introduce CET MSR XSAVES supervisor states Yu-cheng Yu
2020-09-25 14:56 ` [PATCH v13 04/26] x86/cet: Add control-protection fault handler Yu-cheng Yu
2020-09-25 14:56 ` [PATCH v13 05/26] x86/cet/shstk: Add Kconfig option for user-mode Shadow Stack Yu-cheng Yu
2020-09-25 14:56 ` [PATCH v13 06/26] x86/mm: Change _PAGE_DIRTY to _PAGE_DIRTY_HW Yu-cheng Yu
2020-09-25 14:56 ` [PATCH v13 07/26] x86/mm: Remove _PAGE_DIRTY_HW from kernel RO pages Yu-cheng Yu
2020-09-25 14:56 ` [PATCH v13 08/26] x86/mm: Introduce _PAGE_COW Yu-cheng Yu
2020-09-25 14:56 ` [PATCH v13 09/26] drm/i915/gvt: Change _PAGE_DIRTY to _PAGE_DIRTY_BITS Yu-cheng Yu
2020-09-25 14:56 ` [PATCH v13 10/26] x86/mm: Update pte_modify for _PAGE_COW Yu-cheng Yu
2020-09-25 14:56 ` [PATCH v13 12/26] mm: Introduce VM_SHSTK for shadow stack memory Yu-cheng Yu
2020-09-25 14:56 ` [PATCH v13 13/26] x86/mm: Shadow Stack page fault error checking Yu-cheng Yu
2020-09-25 14:56 ` [PATCH v13 14/26] x86/mm: Update maybe_mkwrite() for shadow stack Yu-cheng Yu
2020-09-25 14:56 ` [PATCH v13 15/26] mm: Fixup places that call pte_mkwrite() directly Yu-cheng Yu
2020-09-25 14:56 ` [PATCH v13 16/26] mm: Add guard pages around a shadow stack Yu-cheng Yu
2020-09-25 14:56 ` Yu-cheng Yu [this message]
2020-09-25 14:56 ` [PATCH v13 18/26] mm: Update can_follow_write_pte() for " Yu-cheng Yu
2020-09-25 14:56 ` [PATCH v13 19/26] mm: Re-introduce do_mmap_pgoff() Yu-cheng Yu
2020-10-02 2:06 ` Peter Collingbourne
2020-10-02 15:58 ` Yu, Yu-cheng
2020-10-02 22:52 ` Peter Collingbourne
2020-10-02 22:57 ` Yu, Yu-cheng
2020-09-25 14:56 ` [PATCH v13 20/26] x86/cet/shstk: User-mode shadow stack support Yu-cheng Yu
2020-09-25 14:56 ` [PATCH v13 21/26] x86/cet/shstk: Handle signals for shadow stack Yu-cheng Yu
2020-09-25 14:56 ` [PATCH v13 22/26] binfmt_elf: Define GNU_PROPERTY_X86_FEATURE_1_AND properties Yu-cheng Yu
2020-09-25 14:56 ` [PATCH v13 23/26] ELF: Introduce arch_setup_elf_property() Yu-cheng Yu
2020-09-25 14:56 ` [PATCH v13 24/26] x86/cet/shstk: Handle thread shadow stack Yu-cheng Yu
2020-09-25 14:56 ` [PATCH v13 25/26] x86/cet/shstk: Add arch_prctl functions for " Yu-cheng Yu
2020-09-25 14:56 ` [PATCH v13 26/26] mm: Introduce PROT_SHSTK " Yu-cheng Yu
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