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>,
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Mike Kravetz <mike.kravetz@oracle.com>,
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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 v17 1/7] x86/cet/ibt: Update Kconfig for user-mode Indirect Branch Tracking
Date: Tue, 29 Dec 2020 13:33:44 -0800 [thread overview]
Message-ID: <20201229213350.17010-2-yu-cheng.yu@intel.com> (raw)
In-Reply-To: <20201229213350.17010-1-yu-cheng.yu@intel.com>
Indirect branch tracking is a hardware security feature that verifies near
indirect call/jump instructions arrive at intended targets, which are
labeled by the compiler with ENDBR opcodes. If such instructions reach
unlabeled locations, the processor raises control-protection faults.
Check the compiler is up-to-date at config time.
Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com>
---
arch/x86/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index b26c79c87558..d19f8aa381db 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1961,6 +1961,7 @@ config X86_CET_USER
def_bool n
depends on CPU_SUP_INTEL && X86_64
depends on AS_WRUSS
+ depends on $(cc-option,-fcf-protection)
select ARCH_USES_HIGH_VMA_FLAGS
select ARCH_HAS_SHADOW_STACK
select ARCH_MAYBE_MKWRITE
--
2.21.0
next prev parent reply other threads:[~2020-12-29 21:35 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-29 21:33 [PATCH v17 0/7] Control-flow Enforcement: Indirect Branch Tracking Yu-cheng Yu
2020-12-29 21:33 ` Yu-cheng Yu [this message]
2020-12-29 21:33 ` [PATCH v17 2/7] x86/cet/ibt: User-mode Indirect Branch Tracking support Yu-cheng Yu
2020-12-29 21:33 ` [PATCH v17 3/7] x86/cet/ibt: Handle signals for Indirect Branch Tracking Yu-cheng Yu
2020-12-29 21:33 ` [PATCH v17 4/7] x86/cet/ibt: Update ELF header parsing " Yu-cheng Yu
2020-12-29 21:33 ` [PATCH v17 5/7] x86/cet/ibt: Update arch_prctl functions " Yu-cheng Yu
2020-12-29 21:33 ` [PATCH v17 6/7] x86/vdso/32: Add ENDBR32 to __kernel_vsyscall entry point Yu-cheng Yu
2020-12-29 21:33 ` [PATCH v17 7/7] x86/vdso: Insert endbr32/endbr64 to vDSO Yu-cheng Yu
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