selftests/powerpc: Skip the subpage_prot tests if the syscall is unavailable
authorMichael Ellerman <mpe@ellerman.id.au>
Mon, 26 Feb 2018 04:22:22 +0000 (15:22 +1100)
committerMichael Ellerman <mpe@ellerman.id.au>
Fri, 2 Mar 2018 00:37:04 +0000 (11:37 +1100)
commitcd4a6f3ab4d80cb919d15897eb3cbc85c2009d4b
tree43faf9b8906c7cc12ed01e060c856876e833e176
parentb7abbd5a3533a31a1e7d4696ea275df543440c51
selftests/powerpc: Skip the subpage_prot tests if the syscall is unavailable

The subpage_prot syscall is only functional when the system is using
the Hash MMU. Since commit 5b2b80714796 ("powerpc/mm: Invalidate
subpage_prot() system call on radix platforms") it returns ENOENT when
the Radix MMU is active. Currently this just makes the test fail.

Additionally the syscall is not available if the kernel is built with
4K pages, or if CONFIG_PPC_SUBPAGE_PROT=n, in which case it returns
ENOSYS because the syscall is missing entirely.

So check explicitly for ENOENT and ENOSYS and skip if we see either of
those.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
tools/testing/selftests/powerpc/mm/subpage_prot.c