Thiago Jung Bauermann <bauerman@xxxxxxxxxxxxx> writes:
> Michael Ellerman <mpe@xxxxxxxxxxxxxx> writes:
>> Thiago Jung Bauermann <bauerman@xxxxxxxxxxxxxxxxxx> writes:
>>> tools/testing/selftests/powerpc/include/reg.h | 1 +
>>> tools/testing/selftests/powerpc/ptrace/Makefile | 5 +-
>>> tools/testing/selftests/powerpc/ptrace/child.h | 130 ++++++++
>>> .../testing/selftests/powerpc/ptrace/ptrace-pkey.c | 326 +++++++++++++++++++++
>>
>> This is failing on machines without pkeys:
>>
>> test: ptrace_pkey
>> tags: git_version:52e7d87
>> [FAIL] Test FAILED on line 117
>> [FAIL] Test FAILED on line 191
>> failure: ptrace_pkey
>>
>>
>> I think the first fail is in the child here:
>>
>> int ptrace_read_regs(pid_t child, unsigned long type, unsigned long regs[],
>> int n)
>> {
>> struct iovec iov;
>> long ret;
>>
>> FAIL_IF(start_trace(child));
>>
>> iov.iov_base = regs;
>> iov.iov_len = n * sizeof(unsigned long);
>>
>> ret = ptrace(PTRACE_GETREGSET, child, type, &iov);
>> FAIL_IF(ret != 0);
>>
>>
>> Which makes sense.
>
> Yes, that is indeed what is going on.
>
>> The test needs to skip if pkeys are not available/enabled. Using the
>> availability of the REGSET might actually be a nice way to detect that,
>> because it's read-only.
>
> I forgot to consider the case of pkeys not available or not enabled,
> sorry about that.
No worries.
> I just sent a v2 which implements your suggestion above.
Thanks.
cheers
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