From patchwork Wed Sep 15 20:30:59 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Reinette Chatre X-Patchwork-Id: 12497353 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 32F31C433FE for ; Wed, 15 Sep 2021 20:31:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1B94361130 for ; Wed, 15 Sep 2021 20:31:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232202AbhIOUco (ORCPT ); Wed, 15 Sep 2021 16:32:44 -0400 Received: from mga07.intel.com ([134.134.136.100]:13812 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231490AbhIOUcf (ORCPT ); Wed, 15 Sep 2021 16:32:35 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10108"; a="286109369" X-IronPort-AV: E=Sophos;i="5.85,296,1624345200"; d="scan'208";a="286109369" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Sep 2021 13:31:15 -0700 X-IronPort-AV: E=Sophos;i="5.85,296,1624345200"; d="scan'208";a="545092784" Received: from rchatre-ws.ostc.intel.com ([10.54.69.144]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Sep 2021 13:31:15 -0700 From: Reinette Chatre To: linux-sgx@vger.kernel.org, jarkko@kernel.org, shuah@kernel.org Cc: seanjc@google.com, bp@alien8.de, dave.hansen@linux.intel.com, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 09/14] selftests/sgx: Add a new kselftest: unclobbered_vdso_oversubscribed Date: Wed, 15 Sep 2021 13:30:59 -0700 Message-Id: <92680982d91b2e4bcbf58c831a606df8509576c4.1631731214.git.reinette.chatre@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Jarkko Sakkinen Add a variation of the unclobbered_vdso test. In the new test, create a heap for the test enclave, which has the same size as all available Enclave Page Cache (EPC) pages in the system. This will guarantee that all test_encl.elf pages *and* SGX Enclave Control Structure (SECS) have been swapped out by the page reclaimer during the load time.. This test will trigger both the page reclaimer and the page fault handler. The page reclaimer triggered, while the heap is being created during the load time. The page fault handler is triggered for all the required pages, while the test case is executing. Signed-off-by: Jarkko Sakkinen Signed-off-by: Reinette Chatre --- tools/testing/selftests/sgx/main.c | 59 ++++++++++++++++++++++++++++++ tools/testing/selftests/sgx/main.h | 1 + 2 files changed, 60 insertions(+) diff --git a/tools/testing/selftests/sgx/main.c b/tools/testing/selftests/sgx/main.c index f41fba919d06..2e0a6523c60c 100644 --- a/tools/testing/selftests/sgx/main.c +++ b/tools/testing/selftests/sgx/main.c @@ -245,6 +245,65 @@ TEST_F(enclave, unclobbered_vdso) EXPECT_EQ(self->run.user_data, 0); } +static bool sysfs_get_ulong(const char *path, unsigned long *value) +{ + struct stat sbuf; + char buf[128]; + ssize_t ret; + int fd; + + ret = stat(path, &sbuf); + if (ret) + return false; + + fd = open(path, O_RDONLY); + if (fd < 0) + return false; + + ret = read(fd, buf, sizeof(buf)); + if (ret < 0) { + close(fd); + return false; + } + + errno = 0; + *value = strtoul(buf, NULL, 0); + + close(fd); + + return errno ? false : true; +} + +TEST_F(enclave, unclobbered_vdso_oversubscribed) +{ + unsigned long total_mem; + struct encl_op op; + + ASSERT_TRUE(sysfs_get_ulong(SGX_TOTAL_MEM_PATH, &total_mem)); + ASSERT_TRUE(setup_test_encl(total_mem, &self->encl, _metadata)); + + memset(&self->run, 0, sizeof(self->run)); + self->run.tcs = self->encl.encl_base; + + op.type = ENCL_OP_PUT; + op.buffer = MAGIC; + + EXPECT_EQ(ENCL_CALL(&op, &self->run, false), 0); + + EXPECT_EEXIT(&self->run); + EXPECT_EQ(self->run.user_data, 0); + + op.type = ENCL_OP_GET; + op.buffer = 0; + + EXPECT_EQ(ENCL_CALL(&op, &self->run, false), 0); + + EXPECT_EQ(op.buffer, MAGIC); + EXPECT_EEXIT(&self->run); + EXPECT_EQ(self->run.user_data, 0); + +} + TEST_F(enclave, clobbered_vdso) { struct encl_op op; diff --git a/tools/testing/selftests/sgx/main.h b/tools/testing/selftests/sgx/main.h index b45c52ec7ab3..dd7767364107 100644 --- a/tools/testing/selftests/sgx/main.h +++ b/tools/testing/selftests/sgx/main.h @@ -7,6 +7,7 @@ #define MAIN_H #define ENCL_HEAP_SIZE_DEFAULT 4096 +#define SGX_TOTAL_MEM_PATH "/sys/kernel/debug/x86/sgx_total_mem" struct encl_segment { void *src;