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@amacapital.net>,
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>
Cc: Yu-cheng Yu <yu-cheng.yu@intel.com>
Subject: [PATCH v8 06/14] x86/cet/ibt: Add arch_prctl functions for IBT
Date: Tue, 13 Aug 2019 13:53:51 -0700 [thread overview]
Message-ID: <20190813205359.12196-7-yu-cheng.yu@intel.com> (raw)
In-Reply-To: <20190813205359.12196-1-yu-cheng.yu@intel.com>
From: "H.J. Lu" <hjl.tools@gmail.com>
Update ARCH_X86_CET_STATUS and ARCH_X86_CET_DISABLE to include
Indirect Branch Tracking features.
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com>
---
arch/x86/include/uapi/asm/prctl.h | 2 ++
arch/x86/kernel/cet_prctl.c | 4 ++++
2 files changed, 6 insertions(+)
diff --git a/arch/x86/include/uapi/asm/prctl.h b/arch/x86/include/uapi/asm/prctl.h
index d962f0ec9ccf..02243127dcf6 100644
--- a/arch/x86/include/uapi/asm/prctl.h
+++ b/arch/x86/include/uapi/asm/prctl.h
@@ -18,5 +18,7 @@
#define ARCH_X86_CET_DISABLE 0x3002
#define ARCH_X86_CET_LOCK 0x3003
#define ARCH_X86_CET_ALLOC_SHSTK 0x3004
+#define ARCH_X86_CET_GET_LEGACY_BITMAP 0x3005 /* deprecated */
+#define ARCH_X86_CET_SET_LEGACY_BITMAP 0x3006 /* deprecated */
#endif /* _ASM_X86_PRCTL_H */
diff --git a/arch/x86/kernel/cet_prctl.c b/arch/x86/kernel/cet_prctl.c
index 9c9d4262b07e..09d8c4ea935c 100644
--- a/arch/x86/kernel/cet_prctl.c
+++ b/arch/x86/kernel/cet_prctl.c
@@ -20,6 +20,8 @@ static int handle_get_status(unsigned long arg2)
if (current->thread.cet.shstk_enabled)
features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK;
+ if (current->thread.cet.ibt_enabled)
+ features |= GNU_PROPERTY_X86_FEATURE_1_IBT;
shstk_base = current->thread.cet.shstk_base;
shstk_size = current->thread.cet.shstk_size;
@@ -69,6 +71,8 @@ int prctl_cet(int option, unsigned long arg2)
return -EPERM;
if (arg2 & GNU_PROPERTY_X86_FEATURE_1_SHSTK)
cet_disable_free_shstk(current);
+ if (arg2 & GNU_PROPERTY_X86_FEATURE_1_IBT)
+ cet_disable_ibt();
return 0;
--
2.17.1
next prev parent reply other threads:[~2019-08-13 21:04 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-13 20:53 [PATCH v8 00/14] Control-flow Enforcement: Branch Tracking, PTRACE Yu-cheng Yu
2019-08-13 20:53 ` [PATCH v8 01/14] x86/cet/ibt: Add Kconfig option for user-mode Indirect Branch Tracking Yu-cheng Yu
2019-08-13 20:53 ` [PATCH v8 02/14] x86/cet/ibt: User-mode indirect branch tracking support Yu-cheng Yu
2019-08-13 20:53 ` [PATCH v8 03/14] x86/cet/ibt: Handle signals for end branch Yu-cheng Yu
2019-08-13 20:53 ` [PATCH v8 04/14] mm/mmap: Add IBT bitmap size to address space limit check Yu-cheng Yu
2019-08-13 20:53 ` [PATCH v8 05/14] x86/cet/ibt: ELF header parsing for IBT Yu-cheng Yu
2019-08-13 20:53 ` Yu-cheng Yu [this message]
2019-08-13 20:53 ` [PATCH v8 07/14] x86/cet/ibt: Add ENDBR to op-code-map Yu-cheng Yu
2019-11-08 13:19 ` Adrian Hunter
2019-08-13 20:53 ` [PATCH v8 08/14] x86/vdso: Insert endbr32/endbr64 to vDSO Yu-cheng Yu
2019-08-13 20:53 ` [PATCH v8 09/14] x86/vdso/32: Add ENDBR32 to __kernel_vsyscall entry point Yu-cheng Yu
2019-08-13 20:53 ` [PATCH v8 10/14] x86/vsyscall/64: Add ENDBR64 to vsyscall entry points Yu-cheng Yu
2019-08-13 20:53 ` [PATCH v8 11/14] x86/vsyscall/64: Fixup shadow stack and branch tracking for vsyscall Yu-cheng Yu
2019-08-13 20:53 ` [PATCH v8 12/14] x86/cet: Add PTRACE interface for CET Yu-cheng Yu
2019-08-13 20:53 ` [PATCH v8 13/14] x86: Discard .note.gnu.property sections Yu-cheng Yu
2019-08-13 20:53 ` [PATCH v8 14/14] Introduce arch_prctl(ARCH_X86_CET_MARK_LEGACY_CODE) Yu-cheng Yu
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