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85e8bcb419
Patch series "Restructure va_high_addr_switch". The va_high_addr_switch memory selftest tests out some corner cases related to allocation and page/hugepage faulting around the switch boundary. Currently, the page size and hugepage size have been statically defined. Post FEAT_LPA2, the Aarch64 Linux kernel adds support for 4k and 16k translation granules on higher addresses; we restructure the test to support the same. In addition, we avoid invocation of the binary twice, in the shell script, to reduce test noise. This patch (of 2): When invoking the binary with "--run-hugetlb" flag, the testcases involving the base page are anyways going to be run. Therefore, remove duplication by invoking the binary only once. Link: https://lkml.kernel.org/r/20240522070435.773918-1-dev.jain@arm.com Link: https://lkml.kernel.org/r/20240522070435.773918-2-dev.jain@arm.com Signed-off-by: Dev Jain <dev.jain@arm.com> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
61 lines
1.5 KiB
Bash
Executable File
61 lines
1.5 KiB
Bash
Executable File
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# Copyright (C) 2022 Adam Sindelar (Meta) <adam@wowsignal.io>
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#
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# This is a test for mmap behavior with 5-level paging. This script wraps the
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# real test to check that the kernel is configured to support at least 5
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# pagetable levels.
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# 1 means the test failed
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exitcode=1
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# Kselftest framework requirement - SKIP code is 4.
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ksft_skip=4
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fail()
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{
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echo "$1"
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exit $exitcode
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}
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check_supported_x86_64()
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{
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local config="/proc/config.gz"
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[[ -f "${config}" ]] || config="/boot/config-$(uname -r)"
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[[ -f "${config}" ]] || fail "Cannot find kernel config in /proc or /boot"
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# gzip -dcfq automatically handles both compressed and plaintext input.
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# See man 1 gzip under '-f'.
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local pg_table_levels=$(gzip -dcfq "${config}" | grep PGTABLE_LEVELS | cut -d'=' -f 2)
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local cpu_supports_pl5=$(awk '/^flags/ {if (/la57/) {print 0;}
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else {print 1}; exit}' /proc/cpuinfo 2>/dev/null)
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if [[ "${pg_table_levels}" -lt 5 ]]; then
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echo "$0: PGTABLE_LEVELS=${pg_table_levels}, must be >= 5 to run this test"
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exit $ksft_skip
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elif [[ "${cpu_supports_pl5}" -ne 0 ]]; then
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echo "$0: CPU does not have the necessary la57 flag to support page table level 5"
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exit $ksft_skip
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fi
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}
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check_test_requirements()
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{
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# The test supports x86_64 and powerpc64. We currently have no useful
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# eligibility check for powerpc64, and the test itself will reject other
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# architectures.
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case `uname -m` in
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"x86_64")
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check_supported_x86_64
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;;
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*)
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return 0
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;;
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esac
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}
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check_test_requirements
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./va_high_addr_switch --run-hugetlb
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