1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0 3# 4# Copyright (C) 2022 Adam Sindelar (Meta) <adam@wowsignal.io> 5# 6# This is a test for mmap behavior with 5-level paging. This script wraps the 7# real test to check that the kernel is configured to support at least 5 8# pagetable levels. 9 10# 1 means the test failed 11exitcode=1 12 13# Kselftest framework requirement - SKIP code is 4. 14ksft_skip=4 15 16fail() 17{ 18 echo "$1" 19 exit $exitcode 20} 21 22check_supported_x86_64() 23{ 24 local config="/proc/config.gz" 25 [[ -f "${config}" ]] || config="/boot/config-$(uname -r)" 26 [[ -f "${config}" ]] || fail "Cannot find kernel config in /proc or /boot" 27 28 # gzip -dcfq automatically handles both compressed and plaintext input. 29 # See man 1 gzip under '-f'. 30 local pg_table_levels=$(gzip -dcfq "${config}" | grep PGTABLE_LEVELS | cut -d'=' -f 2) 31 32 if [[ "${pg_table_levels}" -lt 5 ]]; then 33 echo "$0: PGTABLE_LEVELS=${pg_table_levels}, must be >= 5 to run this test" 34 exit $ksft_skip 35 fi 36} 37 38check_test_requirements() 39{ 40 # The test supports x86_64 and powerpc64. We currently have no useful 41 # eligibility check for powerpc64, and the test itself will reject other 42 # architectures. 43 case `uname -m` in 44 "x86_64") 45 check_supported_x86_64 46 ;; 47 *) 48 return 0 49 ;; 50 esac 51} 52 53check_test_requirements 54./va_high_addr_switch 55 56# In order to run hugetlb testcases, "--run-hugetlb" must be appended 57# to the binary. 58./va_high_addr_switch --run-hugetlb 59