The va_128TBswitch selftest is designed and implemented for PowerPC and
x86 architectures which support a 128TB switch, up to 256TB of virtual
address space and hugepage sizes of 16MB and 2MB respectively. Arm64
platforms on the other hand support a 256Tb switch, up to 4PB of virtual
address space and a default hugepage size of 512MB when 64k pagesize is
enabled.
These architectural differences require introducing support for arm64
platforms, after which a more generic naming convention is suggested.
The in code comments are amended to provide a more platform independent
explanation of the working of the code and nr_hugepages are configured
as required. Finally, the file running the testcase is modified in order
to prevent skipping of hugetlb testcases of va_high_addr_switch.
This series has been tested on 6.3.0-rc3 kernel, both on arm64 and x86
platforms.
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxx>
Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Cc: linux-mm@xxxxxxxxx
Cc: linux-kselftest@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Chaitanya S Prakash (5):
selftests/mm: Add support for arm64 platform on va switch
selftests/mm: Rename va_128TBswitch to va_high_addr_switch
selftests/mm: Add platform independent in code comments
selftests/mm: Configure nr_hugepages for arm64
selftests/mm: Run hugetlb testcases of va switch
tools/testing/selftests/mm/Makefile | 4 +-
tools/testing/selftests/mm/run_vmtests.sh | 12 +++++-
...va_128TBswitch.c => va_high_addr_switch.c} | 41 +++++++++++++++----
..._128TBswitch.sh => va_high_addr_switch.sh} | 6 ++-
4 files changed, 49 insertions(+), 14 deletions(-)
rename tools/testing/selftests/mm/{va_128TBswitch.c => va_high_addr_switch.c} (86%)
rename tools/testing/selftests/mm/{va_128TBswitch.sh => va_high_addr_switch.sh} (89%)
--
2.30.2
