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From: Yu-cheng Yu <yu-cheng.yu@intel.com>
To: linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
	linux-mm@kvack.org, linux-arch@vger.kernel.org, x86@kernel.org,
	"H. Peter Anvin" <hpa@zytor.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, "H.J. Lu" <hjl.tools@gmail.com>,
	Vedvyas Shanbhogue <vedvyas.shanbhogue@intel.com>,
	"Ravi V. Shankar" <ravi.v.shankar@intel.com>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	Andy Lutomirski <luto@amacapital.net>,
	Jonathan Corbet <corbet@lwn.net>, Oleg Nesterov <oleg@redhat.com>,
	Arnd Bergmann <arnd@arndb.de>,
	Mike Kravetz <mike.kravetz@oracle.com>
Cc: Yu-cheng Yu <yu-cheng.yu@intel.com>
Subject: [PATCH 1/7] x86/cet: Add Kconfig option for user-mode Indirect Branch Tracking
Date: Thu,  7 Jun 2018 07:38:49 -0700	[thread overview]
Message-ID: <20180607143855.3681-2-yu-cheng.yu@intel.com> (raw)
In-Reply-To: <20180607143855.3681-1-yu-cheng.yu@intel.com>

The user-mode indirect branch tracking support is done mostly by
GCC to insert ENDBR64/ENDBR32 instructions at branch targets.
The kernel provides CPUID enumeration, feature MSR setup and
the allocation of legacy bitmap.

Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com>
---
 arch/x86/Kconfig | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 24339a5299da..27bfbd137fbe 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1953,6 +1953,18 @@ config X86_INTEL_SHADOW_STACK_USER
 
 	  If unsure, say y.
 
+config X86_INTEL_BRANCH_TRACKING_USER
+	prompt "Intel Indirect Branch Tracking for user-mode"
+	def_bool n
+	depends on CPU_SUP_INTEL && X86_64
+	select X86_INTEL_CET
+	select ARCH_HAS_PROGRAM_PROPERTIES
+	---help---
+	  Indirect Branch Tracking provides hardware protection against return-/jmp-
+	  oriented programing attacks.
+
+	  If unsure, say y
+
 config EFI
 	bool "EFI runtime service support"
 	depends on ACPI
-- 
2.15.1

  reply	other threads:[~2018-06-07 15:36 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-07 14:38 [PATCH 0/7] Control Flow Enforcement - Part (4) Yu-cheng Yu
2018-06-07 14:38 ` Yu-cheng Yu [this message]
2018-06-07 16:43   ` [PATCH 1/7] x86/cet: Add Kconfig option for user-mode Indirect Branch Tracking Randy Dunlap
2018-06-07 14:38 ` [PATCH 2/7] x86/cet: User-mode indirect branch tracking support Yu-cheng Yu
2018-06-07 14:38 ` [PATCH 3/7] mm/mmap: Add IBT bitmap size to address space limit check Yu-cheng Yu
2018-06-07 18:39   ` Andy Lutomirski
2018-06-07 14:38 ` [PATCH 4/7] x86/cet: add arcp_prctl functions for indirect branch tracking Yu-cheng Yu
2018-06-07 14:38 ` [PATCH 5/7] x86: Insert endbr32/endbr64 to vDSO Yu-cheng Yu
2018-06-07 20:50   ` Andy Lutomirski
2018-06-07 22:03     ` H.J. Lu
2018-06-07 23:00       ` Andy Lutomirski
2018-06-08  0:31         ` H.J. Lu
2018-06-08  0:47           ` Andy Lutomirski
2018-06-07 14:38 ` [PATCH 6/7] tools: Add cetcmd Yu-cheng Yu
2018-06-07 14:38 ` [PATCH 7/7] x86/cet: Add PTRACE interface for CET Yu-cheng Yu
2018-06-07 18:32   ` Andy Lutomirski

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