linux-kernel - [RFC PATCH 6/7] security: enable system call isolation in kernel config

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Date:   Fri, 26 Apr 2019 00:45:53 +0300
From:   Mike Rapoport <rppt@...ux.ibm.com>
To:     linux-kernel@...r.kernel.org
Cc:     Alexandre Chartre <alexandre.chartre@...cle.com>,
        Andy Lutomirski <luto@...nel.org>,
        Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
        James Bottomley <James.Bottomley@...senpartnership.com>,
        Jonathan Adams <jwadams@...gle.com>,
        Kees Cook <keescook@...omium.org>,
        Paul Turner <pjt@...gle.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>, linux-mm@...ck.org,
        linux-security-module@...r.kernel.org, x86@...nel.org,
        Mike Rapoport <rppt@...ux.ibm.com>
Subject: [RFC PATCH 6/7] security: enable system call isolation in kernel config

Add SYSCALL_ISOLATION Kconfig option to enable build of SCI infrastructure.

Signed-off-by: Mike Rapoport <rppt@...ux.ibm.com>
---
 security/Kconfig | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/security/Kconfig b/security/Kconfig
index e4fe2f3..0c6929a 100644
--- a/security/Kconfig
+++ b/security/Kconfig
@@ -65,6 +65,16 @@ config PAGE_TABLE_ISOLATION
 
 	  See Documentation/x86/pti.txt for more details.
 
+config SYSCALL_ISOLATION
+	bool "System call isolation"
+	default n
+	depends on PAGE_TABLE_ISOLATION && !X86_PAE
+	help
+	  This is an experimental feature to allow executing system
+	  calls in an isolated address space.
+
+	  If you are unsure how to answer this question, answer N.
+
 config SECURITY_INFINIBAND
 	bool "Infiniband Security Hooks"
 	depends on SECURITY && INFINIBAND
-- 
2.7.4