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| author |   Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> | 2020-11-27 10:14:14 +0530 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2020-12-04 01:01:26 +1100 |
| commit | d5fa30e6993ffcdd1859d8dab1a07a6f6c6e7c3f (patch) | |
| tree | 69bb6b2eb8e0488a5228288cc2073d47ac706191 /arch/powerpc/include/asm/book3s/64 | |
| parent | powerpc/book3s64/pkeys: Inherit correctly on fork. (diff) | |
| download | linux-dev-d5fa30e6993ffcdd1859d8dab1a07a6f6c6e7c3f.tar.xz linux-dev-d5fa30e6993ffcdd1859d8dab1a07a6f6c6e7c3f.zip | |
powerpc/book3s64/pkeys: Reset userspace AMR correctly on exec
On fork, we inherit from the parent and on exec, we should switch to default_amr values.
Also, avoid changing the AMR register value within the kernel. The kernel now runs with
different AMR values.
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/20201127044424.40686-13-aneesh.kumar@linux.ibm.com
Diffstat (limited to 'arch/powerpc/include/asm/book3s/64')
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/pkeys.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/pkeys.h b/arch/powerpc/include/asm/book3s/64/pkeys.h index b7d9f4267bcd..3b8640498f5b 100644 --- a/arch/powerpc/include/asm/book3s/64/pkeys.h +++ b/arch/powerpc/include/asm/book3s/64/pkeys.h @@ -6,6 +6,8 @@ #include <asm/book3s/64/hash-pkey.h> extern u64 __ro_after_init default_uamor; +extern u64 __ro_after_init default_amr; +extern u64 __ro_after_init default_iamr; static inline u64 vmflag_to_pte_pkey_bits(u64 vm_flags) { |