linux-kernel - [PATCH 0/5] selftests/mm: Implement support for arm64 on va

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Message-Id: <20230323105243.2807166-1-chaitanyas.prakash@arm.com>
Date:   Thu, 23 Mar 2023 16:22:38 +0530
From:   Chaitanya S Prakash <chaitanyas.prakash@....com>
To:     linux-mm@...ck.org, linux-kernel@...r.kernel.org
Cc:     Chaitanya S Prakash <chaitanyas.prakash@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Aneesh Kumar K . V" <aneesh.kumar@...ux.ibm.com>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        Shuah Khan <shuah@...nel.org>, linux-kselftest@...r.kernel.org
Subject: [PATCH 0/5] selftests/mm: Implement support for arm64 on va

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@...ux-foundation.org>
Cc: Aneesh Kumar K.V <aneesh.kumar@...ux.ibm.com>
Cc: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
Cc: Shuah Khan <shuah@...nel.org>
Cc: linux-mm@...ck.org
Cc: linux-kselftest@...r.kernel.org
Cc: linux-kernel@...r.kernel.org 

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