diff options
Diffstat (limited to 'tools/testing/selftests/mm/va_high_addr_switch.sh')
| -rwxr-xr-x | tools/testing/selftests/mm/va_high_addr_switch.sh | 85 |
1 files changed, 72 insertions, 13 deletions
diff --git a/tools/testing/selftests/mm/va_high_addr_switch.sh b/tools/testing/selftests/mm/va_high_addr_switch.sh index 2c725773cd79..9492c2d72634 100755 --- a/tools/testing/selftests/mm/va_high_addr_switch.sh +++ b/tools/testing/selftests/mm/va_high_addr_switch.sh @@ -7,23 +7,21 @@ # 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 +orig_nr_hugepages=0 -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 "${config}" ]] || skip "Cannot find kernel config in /proc or /boot" # gzip -dcfq automatically handles both compressed and plaintext input. # See man 1 gzip under '-f'. @@ -33,28 +31,89 @@ check_supported_x86_64() else {print 1}; exit}' /proc/cpuinfo 2>/dev/null) if [[ "${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 "$0: CPU does not have the necessary la57 flag to support page table level 5" + fi +} + +check_supported_ppc64() +{ + local config="/proc/config.gz" + [[ -f "${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 "$0: HugePages are not enabled, required for some tests" fi } check_test_requirements() { - # The test supports x86_64 and powerpc64. We currently have no useful - # eligibility check for powerpc64, and the test itself will reject other - # architectures. + # The test supports x86_64, powerpc64 and arm64. There's check for arm64 + # in va_high_addr_switch.c. The test itself will reject other architectures. + case `uname -m` in "x86_64") check_supported_x86_64 ;; + "ppc64le"|"ppc64") + check_supported_ppc64 + ;; *) return 0 ;; esac } +save_nr_hugepages() +{ + orig_nr_hugepages=$(cat /proc/sys/vm/nr_hugepages) +} + +restore_nr_hugepages() +{ + echo "$orig_nr_hugepages" > /proc/sys/vm/nr_hugepages +} + +setup_nr_hugepages() +{ + local needpgs=$1 + while read -r name size unit; do + if [ "$name" = "HugePages_Free:" ]; then + freepgs="$size" + break + fi + done < /proc/meminfo + if [ "$freepgs" -ge "$needpgs" ]; then + return + fi + local hpgs=$((orig_nr_hugepages + needpgs)) + echo $hpgs > /proc/sys/vm/nr_hugepages + + local nr_hugepgs=$(cat /proc/sys/vm/nr_hugepages) + if [ "$nr_hugepgs" != "$hpgs" ]; then + restore_nr_hugepages + skip "$0: no enough hugepages for testing" + fi +} + check_test_requirements +save_nr_hugepages +# The HugeTLB tests require 6 pages +setup_nr_hugepages 6 ./va_high_addr_switch --run-hugetlb +retcode=$? +restore_nr_hugepages +exit $retcode |