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| author | Sandipan Das <sandipan@linux.ibm.com> | 2020-06-04 14:56:08 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-06-30 06:37:47 +0200 |
| commit | 828ca4320d130bbe1d12866152600c49ff6a9f79 (patch) | |
| tree | 19669711fd35c984590e4e6cb434cdbf11474ff8 /tools/testing/selftests/powerpc/ptrace/ptrace-pkey.c | |
| parent | powerpc/8xx: Modify ptep_get() (diff) | |
| download | linux-828ca4320d130bbe1d12866152600c49ff6a9f79.tar.xz linux-828ca4320d130bbe1d12866152600c49ff6a9f79.zip | |
selftests/powerpc: Fix pkey access right updates
The Power ISA mandates that all writes to the Authority
Mask Register (AMR) must always be preceded as well as
succeeded by a context synchronizing instruction.
This makes sure that the tests follow this requirement
when attempting to update a pkey's access rights.
Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200604125610.649668-2-sandipan@linux.ibm.com
Diffstat (limited to 'tools/testing/selftests/powerpc/ptrace/ptrace-pkey.c')
| -rw-r--r-- | tools/testing/selftests/powerpc/ptrace/ptrace-pkey.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-pkey.c b/tools/testing/selftests/powerpc/ptrace/ptrace-pkey.c index bdbbbe8431e0..904c04f8c919 100644 --- a/tools/testing/selftests/powerpc/ptrace/ptrace-pkey.c +++ b/tools/testing/selftests/powerpc/ptrace/ptrace-pkey.c @@ -126,7 +126,7 @@ static int child(struct shared_info *info) printf("%-30s AMR: %016lx pkey1: %d pkey2: %d pkey3: %d\n", user_write, info->amr1, pkey1, pkey2, pkey3); - mtspr(SPRN_AMR, info->amr1); + set_amr(info->amr1); /* Wait for parent to read our AMR value and write a new one. */ ret = prod_parent(&info->child_sync); |