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Mike Rapoport (Microsoft)andAndrew Morton
e8a83b3a12
Since va_high_addr_switch takes care of setting up huge pages, there is no need to set them up in the va_high_addr_switch.sh wrapper script. Link: https://lore.kernel.org/20260511162840.375890-54-rppt@kernel.org Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Reviewed-by: Luiz Capitulino <luizcap@redhat.com> Tested-by: Luiz Capitulino <luizcap@redhat.com> Cc: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: Barry Song <baohua@kernel.org> Cc: David Hildenbrand <david@kernel.org> Cc: Dev Jain <dev.jain@arm.com> Cc: Donet Tom <donettom@linux.ibm.com> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Lance Yang <lance.yang@linux.dev> Cc: Leon Romanovsky <leon@kernel.org> Cc: Liam Howlett <liam@infradead.org> Cc: Li Wang <li.wang@linux.dev> Cc: Lorenzo Stoakes <ljs@kernel.org> Cc: Mark Brown <broonie@kernel.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Nico Pache <npache@redhat.com> Cc: Peter Xu <peterx@redhat.com> Cc: Ryan Roberts <ryan.roberts@arm.com> Cc: Sarthak Sharma <sarthak.sharma@arm.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@kernel.org> Cc: Zi Yan <ziy@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
81 lines
2.3 KiB
Bash
Executable File
81 lines
2.3 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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# Kselftest framework requirement - SKIP code is 4.
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ksft_skip=4
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skip()
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{
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echo "$1"
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exit $ksft_skip
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}
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check_supported_x86_64()
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{
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local config="/proc/config.gz"
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[[ -f "${config}" ]] || config="/boot/config-$(uname -r)"
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[[ -f "${config}" ]] || skip "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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skip "$0: PGTABLE_LEVELS=${pg_table_levels}, must be >= 5 to run this test"
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elif [[ "${cpu_supports_pl5}" -ne 0 ]]; then
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skip "$0: CPU does not have the necessary la57 flag to support page table level 5"
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fi
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}
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check_supported_ppc64()
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{
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local config="/proc/config.gz"
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[[ -f "${config}" ]] || config="/boot/config-$(uname -r)"
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[[ -f "${config}" ]] || skip "Cannot find kernel config in /proc or /boot"
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local pg_table_levels=$(gzip -dcfq "${config}" | grep PGTABLE_LEVELS | cut -d'=' -f 2)
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if [[ "${pg_table_levels}" -lt 5 ]]; then
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skip "$0: PGTABLE_LEVELS=${pg_table_levels}, must be >= 5 to run this test"
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fi
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local mmu_support=$(grep -m1 "mmu" /proc/cpuinfo | awk '{print $3}')
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if [[ "$mmu_support" != "radix" ]]; then
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skip "$0: System does not use Radix MMU, required for 5-level paging"
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fi
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local hugepages_total=$(awk '/HugePages_Total/ {print $2}' /proc/meminfo)
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if [[ "${hugepages_total}" -eq 0 ]]; then
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skip "$0: HugePages are not enabled, required for some tests"
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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, powerpc64 and arm64. There's check for arm64
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# in va_high_addr_switch.c. The test itself will reject other 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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"ppc64le"|"ppc64")
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check_supported_ppc64
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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
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