Michael Ellerman <mpe@xxxxxxxxxxxxxx> writes:
> Thiago Jung Bauermann <bauerman@xxxxxxxxxxxxxxxxxx> writes:
>
>> This test exercises read and write access to the AMR, IAMR and UAMOR.
>>
>> Signed-off-by: Thiago Jung Bauermann <bauerman@xxxxxxxxxxxxxxxxxx>
>> ---
>> 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.
I just sent a v2 which implements your suggestion above.
--
Thiago Jung Bauermann
IBM Linux Technology Center
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