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selftests/mm: skip hugevm test if kernel config file is not present

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When running hugevm tests in a machine without kernel config present,
e.g., a VM running a kernel without CONFIG_IKCONFIG_PROC nor
/boot/config-*, skip hugevm tests, which reads kernel config to get page
table level information.

Link: https://lkml.kernel.org/r/20250516132938.356627-3-ziy@nvidia.com
Signed-off-by: Zi Yan <ziy@nvidia.com>
Acked-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Adam Sindelar <adam@wowsignal.io>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Pedro Falcato <pfalcato@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Zi Yan 2025-05-16 09:29:38 -04:00 committed by Andrew Morton
parent 6d21130312
commit 115155901d
1 changed files with 9 additions and 17 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

26
tools/testing/selftests/mm/va_high_addr_switch.sh
View file

@ -7,23 +7,20 @@
# real test to check that the kernel is configured to support at least 5
# pagetable levels.
# 1 means the test failed
exitcode=1
# Kselftest framework requirement - SKIP code is 4.
ksft_skip=4
fail()
skip()
{
echo "$1"
exit $exitcode
exit $ksft_skip
}
check_supported_x86_64()
{
local config="/proc/config.gz"
[[ -f "${config}" ]] || config="/boot/config-$(uname -r)"
[[ -f "${config}" ]] || fail "Cannot find kernel config in /proc or /boot"
[[ -f "${config}" ]] || skip "Cannot find kernel config in /proc or /boot"
# gzip -dcfq automatically handles both compressed and plaintext input.
# See man 1 gzip under '-f'.
@ -33,11 +30,9 @@ check_supported_x86_64()
else {print 1}; exit}' /proc/cpuinfo 2>/dev/null)
if [[ "${pg_table_levels}" -lt 5 ]]; then
echo "$0: PGTABLE_LEVELS=${pg_table_levels}, must be >= 5 to run this test"
exit $ksft_skip
skip "$0: PGTABLE_LEVELS=${pg_table_levels}, must be >= 5 to run this test"
elif [[ "${cpu_supports_pl5}" -ne 0 ]]; then
echo "$0: CPU does not have the necessary la57 flag to support page table level 5"
exit $ksft_skip
skip "$0: CPU does not have the necessary la57 flag to support page table level 5"
fi
}
@ -45,24 +40,21 @@ check_supported_ppc64()
{
local config="/proc/config.gz"
[[ -f "${config}" ]] || config="/boot/config-$(uname -r)"
[[ -f "${config}" ]] || fail "Cannot find kernel config in /proc or /boot"
[[ -f "${config}" ]] || skip "Cannot find kernel config in /proc or /boot"
local pg_table_levels=$(gzip -dcfq "${config}" | grep PGTABLE_LEVELS | cut -d'=' -f 2)
if [[ "${pg_table_levels}" -lt 5 ]]; then
echo "$0: PGTABLE_LEVELS=${pg_table_levels}, must be >= 5 to run this test"
exit $ksft_skip
skip "$0: PGTABLE_LEVELS=${pg_table_levels}, must be >= 5 to run this test"
fi
local mmu_support=$(grep -m1 "mmu" /proc/cpuinfo | awk '{print $3}')
if [[ "$mmu_support" != "radix" ]]; then
echo "$0: System does not use Radix MMU, required for 5-level paging"
exit $ksft_skip
skip "$0: System does not use Radix MMU, required for 5-level paging"
fi
local hugepages_total=$(awk '/HugePages_Total/ {print $2}' /proc/meminfo)
if [[ "${hugepages_total}" -eq 0 ]]; then
echo "$0: HugePages are not enabled, required for some tests"
exit $ksft_skip
skip "$0: HugePages are not enabled, required for some tests"
fi
}