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Thu, 27 Mar 2025 11:48:23 +0000 (UTC) Received: from dell-per7425-02.rhts.eng.pek2.redhat.com (dell-per7425-02.rhts.eng.pek2.redhat.com [10.73.116.18]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 6F78319541A5; Thu, 27 Mar 2025 11:48:17 +0000 (UTC) From: Li Wang To: linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, akpm@linux-foundation.org, shuah@kernel.org Cc: dev.jain@arm.com, anshuman.khandual@arm.com, kirill.shutemov@linux.intel.com Subject: [PATCH] selftest/mm: va_high_addr_switch: add ppc64 support check Date: Thu, 27 Mar 2025 19:48:13 +0800 Message-ID: <20250327114813.25980-1-liwang@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 X-Rspamd-Server: rspam01 X-Stat-Signature: 8qaerwp9qmr5itr8gdjj4duartxy55zq X-Rspam-User: X-Rspamd-Queue-Id: B2F824000E X-HE-Tag: 1743076134-35046 X-HE-Meta: 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 ql/j8YTV haY1Rc9hwDMBxCXT/1/PP6oSawNU9So9UlHsMi+oERdlhSIEHIffReFfsc4c9F9gT/adwywdOwSr7awqyNhVQfGYAnMylLQGsi9QoRZOlsXvYAoFqtYMW45YOIfz+ZezOH3uvoD4OGRZQbeeccu0paL16xizmzkBqqUTFBWjmeAohpSmUxs1rlgHAhqWuxztHGuvtJuVE7pORdZ6sgckrLKU1AQ8GSq8JUzXmAMgu3d+g82MUAow6aoK8NnTsmOAkqN6o+LQfZHeQhbz1kXAd1BzLFd8Z9d4YM3DLAeJYui1kVO2BhXKMa9n8dDfMRLFj74z2NNdfBwxrBzNIdVElIikWTH1GmySYXZ9qV4HIJE0EvR03GJxDpBROqjCGsMYePLj9 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: This patch adds PPC64 Radix MMU support to the va_high_addr_switch.sh by introducing check_supported_ppc64(). The function verifies: - 5-level paging (PGTABLE_LEVELS >= 5) enable in kernel config - Radix MMU (required for PPC64 5-level translation) - HugePages availability (needed for some tests) If any check fails, the test is skipped (ksft_skip). This ensures compatibility with Power9/Power10 systems running in Radix MMU mode. Avoid failures on 4-level paging system: # mmap(NULL, MAP_HUGETLB): 0xffffffffffffffff - FAILED # mmap(LOW_ADDR, MAP_HUGETLB): 0xffffffffffffffff - FAILED # mmap(HIGH_ADDR, MAP_HUGETLB): 0xffffffffffffffff - FAILED # mmap(HIGH_ADDR, MAP_HUGETLB) again: 0xffffffffffffffff - FAILED # mmap(HIGH_ADDR, MAP_FIXED | MAP_HUGETLB): 0xffffffffffffffff - FAILED # mmap(-1, MAP_HUGETLB): 0xffffffffffffffff - FAILED # mmap(-1, MAP_HUGETLB) again: 0xffffffffffffffff - FAILED # mmap(ADDR_SWITCH_HINT - PAGE_SIZE, 2*HUGETLB_SIZE, MAP_HUGETLB): 0xffffffffffffffff - FAILED # mmap(ADDR_SWITCH_HINT , 2*HUGETLB_SIZE, MAP_FIXED | MAP_HUGETLB): 0xffffffffffffffff - FAILED Signed-off-by: Li Wang --- .../selftests/mm/va_high_addr_switch.sh | 28 +++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/tools/testing/selftests/mm/va_high_addr_switch.sh b/tools/testing/selftests/mm/va_high_addr_switch.sh index 2c725773cd79..1f92e8caceac 100755 --- a/tools/testing/selftests/mm/va_high_addr_switch.sh +++ b/tools/testing/selftests/mm/va_high_addr_switch.sh @@ -41,6 +41,31 @@ check_supported_x86_64() fi } +check_supported_ppc64() +{ + local config="/proc/config.gz" + [[ -f "${config}" ]] || config="/boot/config-$(uname -r)" + [[ -f "${config}" ]] || fail "Cannot find kernel config in /proc or /boot" + + local pg_table_levels=$(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 $ksft_skip + fi + + local mmu_support=$(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 $ksft_skip + fi + + local hugepages_total=$(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 + fi +} + check_test_requirements() { # The test supports x86_64 and powerpc64. We currently have no useful @@ -50,6 +75,9 @@ check_test_requirements() "x86_64") check_supported_x86_64 ;; + "ppc64le"|"ppc64") + check_supported_ppc64 + ;; *) return 0 ;;