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3 commits

Author SHA1 Message Date
Christophe Leroy
4589a2b789 powerpc/kuap: MMU_FTR_BOOK3S_KUAP becomes MMU_FTR_KUAP 
In order to reuse MMU_FTR_BOOK3S_KUAP for other targets than BOOK3S,
rename it MMU_FTR_KUAP.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/c8b6f7b8cd0eeaace96879ed0e0a157faa619451.1689091022.git.christophe.leroy@csgroup.eu
 2023-08-02 22:22:18 +10:00
Aneesh Kumar K.V
d94b827e89 powerpc/book3s64/kuap: Use Key 3 for kernel mapping with hash translation 
This patch updates kernel hash page table entries to use storage key 3
for its mapping. This implies all kernel access will now use key 3 to
control READ/WRITE. The patch also prevents the allocation of key 3 from
userspace and UAMOR value is updated such that userspace cannot modify key 3.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reviewed-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-9-aneesh.kumar@linux.ibm.com
 2020-12-04 01:01:25 +11:00
Aneesh Kumar K.V
b9658f83e7 powerpc/book3s64/pkeys: pkeys are supported only on hash on book3s. 
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200709032946.881753-4-aneesh.kumar@linux.ibm.com
 2020-07-20 22:57:57 +10:00