Commit 11515590 authored by Zi Yan's avatar Zi Yan Committed by Andrew Morton
Browse files

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

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: default avatarZi Yan <ziy@nvidia.com>
Acked-by: default avatarLorenzo 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: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 6d211303

tools/testing/selftests/mm/va_high_addr_switch.sh

+9 −17
Original line number Diff line number Diff line
@@ -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

}