mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git
synced 2026-04-18 03:23:53 -04:00
6319c4f442
The test supports arm64 as well so the comment is incorrect. And there's a check for arm64 in va_high_addr_switch.c. Link: https://lkml.kernel.org/r/20251221040025.3159990-5-chuhu@redhat.com Fixes:983e760bcd("selftest/mm: va_high_addr_switch: add ppc64 support check") Fixes:f556acc2fa("selftests/mm: skip test for non-LPA2 and non-LVA systems") Signed-off-by: Chunyu Hu <chuhu@redhat.com> Reviewed-by: Luiz Capitulino <luizcap@redhat.com> Cc: "David Hildenbrand (Red Hat)" <david@kernel.org> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Shuah Khan <shuah@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
120 lines
3.0 KiB
Bash
Executable File
120 lines
3.0 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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orig_nr_hugepages=0
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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 "$0: HugePages are not enabled, required for some tests"
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fi
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}
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check_test_requirements()
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{
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# The test supports x86_64, powerpc64 and arm64. There's check for arm64
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# in va_high_addr_switch.c. The test itself will reject other architectures.
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case `uname -m` in
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"x86_64")
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check_supported_x86_64
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;;
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"ppc64le"|"ppc64")
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check_supported_ppc64
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;;
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*)
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return 0
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;;
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esac
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}
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save_nr_hugepages()
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{
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orig_nr_hugepages=$(cat /proc/sys/vm/nr_hugepages)
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}
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restore_nr_hugepages()
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{
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echo "$orig_nr_hugepages" > /proc/sys/vm/nr_hugepages
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}
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setup_nr_hugepages()
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{
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local needpgs=$1
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while read -r name size unit; do
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if [ "$name" = "HugePages_Free:" ]; then
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freepgs="$size"
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break
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fi
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done < /proc/meminfo
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if [ "$freepgs" -ge "$needpgs" ]; then
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return
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fi
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local hpgs=$((orig_nr_hugepages + needpgs))
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echo $hpgs > /proc/sys/vm/nr_hugepages
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local nr_hugepgs=$(cat /proc/sys/vm/nr_hugepages)
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if [ "$nr_hugepgs" != "$hpgs" ]; then
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restore_nr_hugepages
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skip "$0: no enough hugepages for testing"
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fi
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}
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check_test_requirements
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save_nr_hugepages
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# The HugeTLB tests require 6 pages
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setup_nr_hugepages 6
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./va_high_addr_switch --run-hugetlb
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retcode=$?
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restore_nr_hugepages
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exit $retcode
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