linux-kernel - [tip:x86/pti] x86/pti: Allow CONFIG_PAGE_TABLE_ISOLATION for x86

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Date:   Thu, 19 Jul 2018 16:37:48 -0700
From:   tip-bot for Joerg Roedel <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     jpoimboe@...hat.com, hpa@...or.com, aarcange@...hat.com,
        tglx@...utronix.de, linux-kernel@...r.kernel.org,
        boris.ostrovsky@...cle.com, brgerst@...il.com, bp@...en8.de,
        jgross@...e.com, luto@...nel.org, jkosina@...e.cz,
        peterz@...radead.org, will.deacon@....com,
        torvalds@...ux-foundation.org, jroedel@...e.de,
        dhgutteridge@...patico.ca, David.Laight@...lab.com,
        dvlasenk@...hat.com, mingo@...nel.org, eduval@...zon.com,
        gregkh@...uxfoundation.org, llong@...hat.com, pavel@....cz,
        dave.hansen@...el.com
Subject: [tip:x86/pti] x86/pti: Allow CONFIG_PAGE_TABLE_ISOLATION for x86_32

Commit-ID:  7757d607c6b31867777de42e1fb0210b9c5d8b70
Gitweb:     https://git.kernel.org/tip/7757d607c6b31867777de42e1fb0210b9c5d8b70
Author:     Joerg Roedel <jroedel@...e.de>
AuthorDate: Wed, 18 Jul 2018 11:41:14 +0200
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Fri, 20 Jul 2018 01:11:48 +0200

x86/pti: Allow CONFIG_PAGE_TABLE_ISOLATION for x86_32

Allow PTI to be compiled on x86_32.

Signed-off-by: Joerg Roedel <jroedel@...e.de>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Tested-by: Pavel Machek <pavel@....cz>
Cc: "H . Peter Anvin" <hpa@...or.com>
Cc: linux-mm@...ck.org
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Dave Hansen <dave.hansen@...el.com>
Cc: Josh Poimboeuf <jpoimboe@...hat.com>
Cc: Juergen Gross <jgross@...e.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Jiri Kosina <jkosina@...e.cz>
Cc: Boris Ostrovsky <boris.ostrovsky@...cle.com>
Cc: Brian Gerst <brgerst@...il.com>
Cc: David Laight <David.Laight@...lab.com>
Cc: Denys Vlasenko <dvlasenk@...hat.com>
Cc: Eduardo Valentin <eduval@...zon.com>
Cc: Greg KH <gregkh@...uxfoundation.org>
Cc: Will Deacon <will.deacon@....com>
Cc: aliguori@...zon.com
Cc: daniel.gruss@...k.tugraz.at
Cc: hughd@...gle.com
Cc: keescook@...gle.com
Cc: Andrea Arcangeli <aarcange@...hat.com>
Cc: Waiman Long <llong@...hat.com>
Cc: "David H . Gutteridge" <dhgutteridge@...patico.ca>
Cc: joro@...tes.org
Link: https://lkml.kernel.org/r/1531906876-13451-38-git-send-email-joro@8bytes.org

---
 security/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/security/Kconfig b/security/Kconfig
index c4302067a3ad..afa91c6f06bb 100644
--- a/security/Kconfig
+++ b/security/Kconfig
@@ -57,7 +57,7 @@ config SECURITY_NETWORK
 config PAGE_TABLE_ISOLATION
 	bool "Remove the kernel mapping in user mode"
 	default y
-	depends on X86_64 && !UML
+	depends on X86 && !UML
 	help
 	  This feature reduces the number of hardware side channels by
 	  ensuring that the majority of kernel addresses are not mapped