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Thu, 10 Mar 2022 11:26:45 -0600 From: Alex Sierra To: CC: , , , , , , , , , , , , Subject: [PATCH v1 2/3] tools: add more gup configs to hmm_gup selftests Date: Thu, 10 Mar 2022 11:26:32 -0600 Message-ID: <20220310172633.9151-3-alex.sierra@amd.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220310172633.9151-1-alex.sierra@amd.com> References: <20220310172633.9151-1-alex.sierra@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 7edfc9fe-5d1b-481a-0d46-08da02bb2733 X-MS-TrafficTypeDiagnostic: BYAPR12MB4982:EE_ X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 9VHFhXQVTro1PivJPVHcG2Fhdh66kxS4HpoSgNTIv6UAmCHlgMHtX+DcFIjLpYhk0d10CIb+u/DtnqroJszg0kt2ZNrQ2u3zkqPpSM0ZaG/j/MrNJ24NssydSaSAgW6Lb8hb3OM9K7QuagLSKKDdKssHzT77exOj9RX+CqiDQguqy2WhUMpzRlKkQBlf/KrH83QOo6qpKKF5eJabmvqq9W14lBo9rOGML7xZ9guW6hV0inTngnNFEzqdH87ZGrVH1MUdr1lwGo1968tc7UdohXcQZXrGSFfpvKlq+l0qwvH5ODcur3YVMZCiTIqZ7OyewiFyCcPDpiZ6ZhJ54H00nrHtHXYCXSOK1Snwa7SHffxUB3l5RYI2BEQTjOoHVza6lNjwAyIEvMaho+6MOB08NcctafV1QBqQYWKm5ByxlqVTz3hBqYa0O7XGG3ujJ7qfZReWl1aYILwe+AdzKA5NwYZdVwj5kx9n+38kUEyBlssroD779CnM4PzxD+oQeeUYvYu+Xj8dLQpqJmrySFjFVKuz0nwDTQn7ihTmjFkLoXKHXnJnz6CBiR2suXKKVFd8JQjymqSFW2lep59t8KO6JkGVzSE0Odknwh+dVlllFnyav73V8MKfRsSkzDBqrR88CechEJdIBAvv1hICr0Zjpvy5NILHHNQ8DDyGWWAvb24x/OZ7IboV83N3sLJ3E3tZX6gjHbCPT42faL1t7r4PSg== X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230001)(4636009)(36840700001)(46966006)(40470700004)(2616005)(82310400004)(81166007)(508600001)(186003)(26005)(8676002)(70206006)(16526019)(70586007)(6666004)(356005)(86362001)(44832011)(5660300002)(47076005)(7696005)(36860700001)(83380400001)(4326008)(36756003)(8936002)(316002)(6916009)(54906003)(7416002)(426003)(336012)(1076003)(2906002)(40460700003)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Mar 2022 17:26:46.4737 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7edfc9fe-5d1b-481a-0d46-08da02bb2733 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT010.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR12MB4982 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org Test device pages with get_user_pages and get_user_pages_fast. The motivation is to test device coherent type pages in the gup and gup fast paths, after vm_normal_pages was split into LRU and non-LRU handled. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling --- tools/testing/selftests/vm/hmm-tests.c | 65 +++++++++++++++++--------- 1 file changed, 44 insertions(+), 21 deletions(-) diff --git a/tools/testing/selftests/vm/hmm-tests.c b/tools/testing/selftests/vm/hmm-tests.c index 11b83a8084fe..65e30ab6494c 100644 --- a/tools/testing/selftests/vm/hmm-tests.c +++ b/tools/testing/selftests/vm/hmm-tests.c @@ -1769,6 +1769,24 @@ TEST_F(hmm, exclusive_cow) hmm_buffer_free(buffer); } +static int gup_test_exec(int gup_fd, unsigned long addr, + int cmd, int npages, int size) +{ + struct gup_test gup = { + .nr_pages_per_call = npages, + .addr = addr, + .gup_flags = FOLL_WRITE, + .size = size, + }; + + if (ioctl(gup_fd, cmd, &gup)) { + perror("ioctl on error\n"); + return errno; + } + + return 0; +} + /* * Test get user device pages through gup_test. Setting PIN_LONGTERM flag. * This should trigger a migration back to system memory for both, private @@ -1779,7 +1797,6 @@ TEST_F(hmm, exclusive_cow) TEST_F(hmm, hmm_gup_test) { struct hmm_buffer *buffer; - struct gup_test gup; int gup_fd; unsigned long npages; unsigned long size; @@ -1792,8 +1809,7 @@ TEST_F(hmm, hmm_gup_test) if (gup_fd == -1) SKIP(return, "Skipping test, could not find gup_test driver"); - npages = 4; - ASSERT_NE(npages, 0); + npages = 3; size = npages << self->page_shift; buffer = malloc(sizeof(*buffer)); @@ -1822,28 +1838,35 @@ TEST_F(hmm, hmm_gup_test) for (i = 0, ptr = buffer->mirror; i < size / sizeof(*ptr); ++i) ASSERT_EQ(ptr[i], i); - gup.nr_pages_per_call = npages; - gup.addr = (unsigned long)buffer->ptr; - gup.gup_flags = FOLL_WRITE; - gup.size = size; - /* - * Calling gup_test ioctl. It will try to PIN_LONGTERM these device pages - * causing a migration back to system memory for both, private and coherent - * type pages. - */ - if (ioctl(gup_fd, PIN_LONGTERM_BENCHMARK, &gup)) { - perror("ioctl on PIN_LONGTERM_BENCHMARK\n"); - goto out_test; - } - - /* Take snapshot to make sure pages have been migrated to sys memory */ + ASSERT_EQ(gup_test_exec(gup_fd, + (unsigned long)buffer->ptr, + GUP_BASIC_TEST, 1, self->page_size), 0); + ASSERT_EQ(gup_test_exec(gup_fd, + (unsigned long)buffer->ptr + 1 * self->page_size, + GUP_FAST_BENCHMARK, 1, self->page_size), 0); + ASSERT_EQ(gup_test_exec(gup_fd, + (unsigned long)buffer->ptr + 2 * self->page_size, + PIN_LONGTERM_BENCHMARK, 1, self->page_size), 0); + + /* Take snapshot to CPU pagetables */ ret = hmm_dmirror_cmd(self->fd, HMM_DMIRROR_SNAPSHOT, buffer, npages); ASSERT_EQ(ret, 0); ASSERT_EQ(buffer->cpages, npages); m = buffer->mirror; - for (i = 0; i < npages; i++) - ASSERT_EQ(m[i], HMM_DMIRROR_PROT_WRITE); -out_test: + if (hmm_is_coherent_type(variant->device_number)) { + ASSERT_EQ(HMM_DMIRROR_PROT_DEV_COHERENT_LOCAL | HMM_DMIRROR_PROT_WRITE, m[0]); + ASSERT_EQ(HMM_DMIRROR_PROT_DEV_COHERENT_LOCAL | HMM_DMIRROR_PROT_WRITE, m[1]); + } else { + ASSERT_EQ(HMM_DMIRROR_PROT_WRITE, m[0]); + ASSERT_EQ(HMM_DMIRROR_PROT_WRITE, m[1]); + } + ASSERT_EQ(HMM_DMIRROR_PROT_WRITE, m[2]); + /* Check again the content on the pages. Make sure there's no + * corrupted data. + */ + for (i = 0, ptr = buffer->ptr; i < size / sizeof(*ptr); ++i) + ASSERT_EQ(ptr[i], i); + close(gup_fd); hmm_buffer_free(buffer); }