From 10248dcba1205042a3a0ea65eb441030702d97cd Mon Sep 17 00:00:00 2001 From: Christophe Leroy Date: Wed, 2 Jun 2021 06:42:10 +0000 Subject: powerpc/44x: Implement Kernel Userspace Exec Protection (KUEP) Powerpc 44x has two bits for exec protection in TLBs: one for user (UX) and one for superviser (SX). Clear SX on user pages in TLB miss handlers to provide KUEP. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/169310e08152aa1d96c979770291d165ec6896ae.1622616032.git.christophe.leroy@csgroup.eu --- arch/powerpc/platforms/Kconfig.cputype | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/powerpc/platforms/Kconfig.cputype') diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype index dc7c46f92302..d4acba7551c2 100644 --- a/arch/powerpc/platforms/Kconfig.cputype +++ b/arch/powerpc/platforms/Kconfig.cputype @@ -61,6 +61,7 @@ config 44x select 4xx_SOC select HAVE_PCI select PHYS_64BIT + select PPC_HAVE_KUEP endchoice -- cgit v1.2.3