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From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Michael Ellerman <mpe@ellerman.id.au>
Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v2 10/12] powerpc/32s: Activate KUAP and KUEP by default
Date: Thu,  3 Jun 2021 08:41:45 +0000 (UTC)	[thread overview]
Message-ID: <86c7c74a3ba5312daea7e9658b096e2bcc6f4b64.1622708530.git.christophe.leroy@csgroup.eu> (raw)
In-Reply-To: <cover.1622708530.git.christophe.leroy@csgroup.eu>

Now that KUAP and KUEP have been significantly optimised and can be
disabled at boot time using 'nosmap' and 'nosmep' kernel parameters,
them can be active by default like in other powerpc platforms.

It is still possible to disable them completely in the configuration.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
 arch/powerpc/platforms/Kconfig.cputype | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index 885140055b7a..52f533b19518 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -389,7 +389,7 @@ config PPC_HAVE_KUEP
 config PPC_KUEP
 	bool "Kernel Userspace Execution Prevention"
 	depends on PPC_HAVE_KUEP
-	default y if !PPC_BOOK3S_32
+	default y
 	help
 	  Enable support for Kernel Userspace Execution Prevention (KUEP)
 
@@ -401,7 +401,7 @@ config PPC_HAVE_KUAP
 config PPC_KUAP
 	bool "Kernel Userspace Access Protection"
 	depends on PPC_HAVE_KUAP
-	default y if !PPC_BOOK3S_32
+	default y
 	help
 	  Enable support for Kernel Userspace Access Protection (KUAP)
 
-- 
2.25.0


WARNING: multiple messages have this Message-ID (diff)
From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Michael Ellerman <mpe@ellerman.id.au>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2 10/12] powerpc/32s: Activate KUAP and KUEP by default
Date: Thu,  3 Jun 2021 08:41:45 +0000 (UTC)	[thread overview]
Message-ID: <86c7c74a3ba5312daea7e9658b096e2bcc6f4b64.1622708530.git.christophe.leroy@csgroup.eu> (raw)
In-Reply-To: <cover.1622708530.git.christophe.leroy@csgroup.eu>

Now that KUAP and KUEP have been significantly optimised and can be
disabled at boot time using 'nosmap' and 'nosmep' kernel parameters,
them can be active by default like in other powerpc platforms.

It is still possible to disable them completely in the configuration.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
 arch/powerpc/platforms/Kconfig.cputype | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index 885140055b7a..52f533b19518 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -389,7 +389,7 @@ config PPC_HAVE_KUEP
 config PPC_KUEP
 	bool "Kernel Userspace Execution Prevention"
 	depends on PPC_HAVE_KUEP
-	default y if !PPC_BOOK3S_32
+	default y
 	help
 	  Enable support for Kernel Userspace Execution Prevention (KUEP)
 
@@ -401,7 +401,7 @@ config PPC_HAVE_KUAP
 config PPC_KUAP
 	bool "Kernel Userspace Access Protection"
 	depends on PPC_HAVE_KUAP
-	default y if !PPC_BOOK3S_32
+	default y
 	help
 	  Enable support for Kernel Userspace Access Protection (KUAP)
 
-- 
2.25.0


  parent reply	other threads:[~2021-06-03  8:42 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-03  8:41 [PATCH v2 00/12] powerpc: Optimise KUAP on book3s/32 Christophe Leroy
2021-06-03  8:41 ` Christophe Leroy
2021-06-03  8:41 ` [PATCH v2 01/12] powerpc/32s: Move setup_{kuep/kuap}() into {kuep/kuap}.c Christophe Leroy
2021-06-03  8:41   ` Christophe Leroy
2021-06-03  8:41 ` [PATCH v2 02/12] powerpc/32s: Refactor update of user segment registers Christophe Leroy
2021-06-03  8:41   ` Christophe Leroy
2021-06-03  8:41 ` [PATCH v2 03/12] powerpc/32s: move CTX_TO_VSID() into mmu-hash.h Christophe Leroy
2021-06-03  8:41   ` Christophe Leroy
2021-06-03  8:41 ` [PATCH v2 04/12] powerpc/32s: Convert switch_mmu_context() to C Christophe Leroy
2021-06-03  8:41   ` Christophe Leroy
2021-06-03  8:41 ` [PATCH v2 05/12] powerpc/32s: Simplify calculation of segment register content Christophe Leroy
2021-06-03  8:41   ` Christophe Leroy
2021-06-03  8:41 ` [PATCH v2 06/12] powerpc/32s: Initialise KUAP and KUEP in C Christophe Leroy
2021-06-03  8:41   ` Christophe Leroy
2021-06-03  8:41 ` [PATCH v2 07/12] powerpc/32s: Allow disabling KUEP at boot time Christophe Leroy
2021-06-03  8:41   ` Christophe Leroy
2021-06-03  8:41 ` [PATCH v2 08/12] powerpc/32s: Allow disabling KUAP " Christophe Leroy
2021-06-03  8:41   ` Christophe Leroy
2021-06-12  6:18   ` Christophe Leroy
2021-06-03  8:41 ` [PATCH v2 09/12] powerpc/32s: Rework Kernel Userspace Access Protection Christophe Leroy
2021-06-03  8:41   ` Christophe Leroy
2021-06-03  8:41 ` Christophe Leroy [this message]
2021-06-03  8:41   ` [PATCH v2 10/12] powerpc/32s: Activate KUAP and KUEP by default Christophe Leroy
2021-06-03  8:41 ` [PATCH v2 11/12] powerpc/kuap: Remove KUAP_CURRENT_XXX Christophe Leroy
2021-06-03  8:41   ` Christophe Leroy
2021-06-03  8:41 ` [PATCH v2 12/12] powerpc/kuap: Remove to/from/size parameters of prevent_user_access() Christophe Leroy
2021-06-03  8:41   ` Christophe Leroy
2021-06-18  3:51 ` [PATCH v2 00/12] powerpc: Optimise KUAP on book3s/32 Michael Ellerman

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