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authorChristophe Leroy <christophe.leroy@csgroup.eu>2021-06-02 06:42:10 +0000
committerMichael Ellerman <mpe@ellerman.id.au>2021-06-17 00:09:07 +1000
commit10248dcba1205042a3a0ea65eb441030702d97cd (patch)
tree47e29ca6d4f4828409d3c64d9a4f5493d13608fa /arch/powerpc/platforms
parentc0ca0fe08c9213a5187e4513b5506667f249030f (diff)
downloadlinux-10248dcba1205042a3a0ea65eb441030702d97cd.tar.bz2
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 <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/169310e08152aa1d96c979770291d165ec6896ae.1622616032.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/platforms')
-rw-r--r--arch/powerpc/platforms/Kconfig.cputype1
1 files changed, 1 insertions, 0 deletions
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