projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 4f2930c6 AS |
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 | |
| 11 | exitcode=1 | |
| 12 | ||
| 13 | # Kselftest framework requirement - SKIP code is 4. | |
| 14 | ksft_skip=4 | |
| 15 | ||
| 16 | fail() | |
| 17 | { | |
| 18 | echo "$1" | |
| 19 | exit $exitcode | |
| 20 | } | |
| 21 | ||
| 22 | check_supported_x86_64() | |
| 23 | { | |
| 24 | local config="/proc/config.gz" | |
| 25 | [[ -f "${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 | ||
| 38 | check_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 | ||
| 53 | check_test_requirements | |
| 54 | ./va_128TBswitch |