From patchwork Thu Mar 27 11:48:13 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Li Wang X-Patchwork-Id: 14031089 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AF2D01F94A for ; Thu, 27 Mar 2025 11:48:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743076136; cv=none; b=IOxXOh3pjyhY24wbBmKfa4cPswMrBGVgIIpMwmkD6P4RwsSy9jdmxl1Ol9wlmxwgfMb5lK56U3XRxy0y1s1R/9uOiO7H2/fyf38MMWFMkj7Ng+pDAP2ihNed4K/A31zDV94h5ezPeNuAEDl6YnhnPkY61TyZZWXuwuOH074vgpA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743076136; c=relaxed/simple; bh=4S7F/d9su9LzjlR5dj2aL2tJ/+5xonvREXzs/WKvQmg=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=qcaVmTXvSZPuWD6NsIfoxcekMcvakvV95trNU/4AwwilZhIbDUl57Uzx5wIXggcCrkiNk5SD2/ZuzaK8n4GO5Q+f0JKOPcVCG37IbqnVx2a/5UOPukAtz0Bi7Sz+b5oI03Qe51yMUMXfEkWdgvKaj8gB5qCFi7kM6N62P7Z8zp4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=DZK3KoUp; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="DZK3KoUp" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1743076129; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=6Vn8ptHkbVBgcEoRHm+SOkDwT5dKBmy9TUadNzB62es=; b=DZK3KoUpyd85rWVzehtcnX7Iy+6PgO3wcOb67CaMjEEMcJbse9N5sWMTHsn0+LyzC6q4sg vfs1YK+baohbpPGeyxl11+Y1qyIEzjcOp3z1QZRFtXl/lWuqFD17Ba1vp+mQ3Sa/vCScbr AJWcjZolgxaa+9TkmVYvpcKWCyYRb4o= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-147-1XMZTIR4MwCv_GrpO4ut1w-1; Thu, 27 Mar 2025 07:48:24 -0400 X-MC-Unique: 1XMZTIR4MwCv_GrpO4ut1w-1 X-Mimecast-MFC-AGG-ID: 1XMZTIR4MwCv_GrpO4ut1w_1743076103 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 44D97195E92A; 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> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 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 ;;