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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-06-02 06:42:10 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-06-17 00:09:07 +1000 |
| commit | 10248dcba1205042a3a0ea65eb441030702d97cd (patch) | |
| tree | 47e29ca6d4f4828409d3c64d9a4f5493d13608fa /arch/powerpc/platforms | |
| parent | c0ca0fe08c9213a5187e4513b5506667f249030f (diff) | |
| download | linux-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.cputype | 1 |
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 |