mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-05 16:54:27 +00:00
115155901d
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>
80 lines
2.3 KiB
Bash
Executable file
80 lines
2.3 KiB
Bash
Executable file
#!/bin/bash
|
|
# SPDX-License-Identifier: GPL-2.0
|
|
#
|
|
# Copyright (C) 2022 Adam Sindelar (Meta) <adam@wowsignal.io>
|
|
#
|
|
# This is a test for mmap behavior with 5-level paging. This script wraps the
|
|
# real test to check that the kernel is configured to support at least 5
|
|
# pagetable levels.
|
|
|
|
# Kselftest framework requirement - SKIP code is 4.
|
|
ksft_skip=4
|
|
|
|
skip()
|
|
{
|
|
echo "$1"
|
|
exit $ksft_skip
|
|
}
|
|
|
|
check_supported_x86_64()
|
|
{
|
|
local config="/proc/config.gz"
|
|
[[ -f "${config}" ]] || config="/boot/config-$(uname -r)"
|
|
[[ -f "${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'.
|
|
local pg_table_levels=$(gzip -dcfq "${config}" | grep PGTABLE_LEVELS | cut -d'=' -f 2)
|
|
|
|
local cpu_supports_pl5=$(awk '/^flags/ {if (/la57/) {print 0;}
|
|
else {print 1}; exit}' /proc/cpuinfo 2>/dev/null)
|
|
|
|
if [[ "${pg_table_levels}" -lt 5 ]]; then
|
|
skip "$0: PGTABLE_LEVELS=${pg_table_levels}, must be >= 5 to run this test"
|
|
elif [[ "${cpu_supports_pl5}" -ne 0 ]]; then
|
|
skip "$0: CPU does not have the necessary la57 flag to support page table level 5"
|
|
fi
|
|
}
|
|
|
|
check_supported_ppc64()
|
|
{
|
|
local config="/proc/config.gz"
|
|
[[ -f "${config}" ]] || config="/boot/config-$(uname -r)"
|
|
[[ -f "${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
|
|
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
|
|
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
|
|
skip "$0: HugePages are not enabled, required for some tests"
|
|
fi
|
|
}
|
|
|
|
check_test_requirements()
|
|
{
|
|
# The test supports x86_64 and powerpc64. We currently have no useful
|
|
# eligibility check for powerpc64, and the test itself will reject other
|
|
# architectures.
|
|
case `uname -m` in
|
|
"x86_64")
|
|
check_supported_x86_64
|
|
;;
|
|
"ppc64le"|"ppc64")
|
|
check_supported_ppc64
|
|
;;
|
|
*)
|
|
return 0
|
|
;;
|
|
esac
|
|
}
|
|
|
|
check_test_requirements
|
|
./va_high_addr_switch --run-hugetlb
|