kernel/tools/testing/selftests/powerpc/mm/subpage_prot.c, branch linux-rolling-stable

selftests/powerpc: Fix 32-bit BE build errors on Ubuntu 24.04

2024-11-07T11:36:30Z

Starting with Ubuntu 24.04, building the selftests with the big endian compiler (which defaults to 32-bit) fails with errors: stack_expansion_ldst.c:178:37: error: format '%lx' expects argument of type 'long unsigned int', but argument 2 has type 'rlim_t' {aka 'long long unsigned int'} subpage_prot.c:214:38: error: format '%lx' expects argument of type 'long unsigned int', but argument 3 has type 'off_t' {aka 'long long int'} Prior to 24.04 rlim_t was long unsigned int, and off_t was long int. Cast to unsigned long long and long long before passing to printf to avoid the errors. Signed-off-by: Michael Ellerman Link: https://patch.msgid.link/20241106130453.1741013-3-mpe@ellerman.id.au

selftests/powerpc: Skip the subpage_prot tests if the syscall is unavailable

2018-03-02T00:37:04Z

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

selftests/powerpc: Fix subpage_prot test to return !0 on failure

2016-05-11T11:54:02Z

It's helpful for automated testing if the test returns error codes back to the calling program. While we're here fix all the usages of %p to remove the double 0x, ie. %p already includes 0x. Signed-off-by: Michael Ellerman Reviewed-by: Aneesh Kumar K.V

selftests/powerpc: Add subpage protection self test.

2015-01-23T03:02:49Z

Signed-off-by: Paul Mackerras Signed-off-by: Aneesh Kumar K.V mpe: Fix compile errors and formatting. Add tempfile logic to Makefile. Signed-off-by: Michael Ellerman