From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7146BCD3427 for ; Mon, 11 May 2026 03:54:09 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 17B2210E461; Mon, 11 May 2026 03:54:09 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="gftj4yAe"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.9]) by gabe.freedesktop.org (Postfix) with ESMTPS id D7DCB10E461 for ; Mon, 11 May 2026 03:53:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1778471618; x=1810007618; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=+B8sMFgZdDclEjcAiDyankSB4faGvA0j2h03Vlm+4O0=; b=gftj4yAePPvP6ujnuXUyYfrzDoHAZv6gFkA2/DPfHRBSNkLWBi8N5yMO +lLVPjpx9Trm4lZzptypk0pfg7QSWz3R5o0bjCJuB9y4pMoAoyWY2Gvv8 DacI29K678FhI+YGUR5sj5ftaSvkK34CLtsHp7By7b/mcNKMekzKZaaM1 Xu3px1wCuQRFO6C6TvNRViPjw6+fP6jTbe8l71XUjodwCjOcweoHj8rjj pBf0irq/0qU2YksDqSWhsBVT6KK9kY0cEG+M/J1ixecJVhBZ/k2iwNQuu p9C1nhZDXFtYoXjztPmsXK46nGe6aDAOVvA1dVdFCyIkRkZx/AHJmgE93 A==; X-CSE-ConnectionGUID: BN/QAbcFQYOrk1gBbVMNBA== X-CSE-MsgGUID: k59oPUecT3K71tgZhLrhCQ== X-IronPort-AV: E=McAfee;i="6800,10657,11782"; a="90053007" X-IronPort-AV: E=Sophos;i="6.23,228,1770624000"; d="scan'208";a="90053007" Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by fmvoesa103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 May 2026 20:53:37 -0700 X-CSE-ConnectionGUID: Ui6vHOQCQEuGt4RBiJPRTQ== X-CSE-MsgGUID: HKqQZFvpR02sN/O+bBfjDg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,228,1770624000"; d="scan'208";a="232857201" Received: from varungup-desk.iind.intel.com ([10.190.238.71]) by fmviesa006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 May 2026 20:53:36 -0700 From: Varun Gupta To: igt-dev@lists.freedesktop.org Cc: arvind.yadav@intel.com, himal.prasad.ghimiray@intel.com, nishit.sharma@intel.com Subject: [PATCH i-g-t v2 4/4] tests/intel/xe_madvise: Add atomic-cpu subtest Date: Mon, 11 May 2026 09:22:59 +0530 Message-ID: <20260511035310.32323-5-varun.gupta@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260511035310.32323-1-varun.gupta@intel.com> References: <20260511035310.32323-1-varun.gupta@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: igt-dev@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Development mailing list for IGT GPU Tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: igt-dev-bounces@lists.freedesktop.org Sender: "igt-dev" Validate that madvise ATOMIC_CPU blocks GPU atomic operations on SVM memory. The test sets ATOMIC_CPU on heap-allocated memory, then submits GPU MI_ATOMIC_INC which must fail because the page-fault handler returns -EACCES for CPU-only atomic mode, causing an engine reset. The fence wait times out (QUARTER_SEC) and the counter must remain 0. Only the first engine is tested to limit CAT errors from repeated resets. Signed-off-by: Varun Gupta v2: Add UNMAP of CPU_ADDR_MIRROR binding before xe_vm_destroy. Add comment explaining break after single-engine run (Nishit). --- tests/intel/xe_madvise.c | 83 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 83 insertions(+) diff --git a/tests/intel/xe_madvise.c b/tests/intel/xe_madvise.c index baf50774d..9a5b9eb31 100644 --- a/tests/intel/xe_madvise.c +++ b/tests/intel/xe_madvise.c @@ -959,6 +959,79 @@ static void test_atomic_global(int fd, struct drm_xe_engine_class_instance *eci) xe_vm_destroy(fd, vm); } +/** + * SUBTEST: atomic-cpu + * Description: madvise atomic cpu supports only CPU atomic operations, + * test verifies GPU MI_ATOMIC_INC is rejected by fault handler + * Test category: functionality test + */ +static void test_atomic_cpu(int fd, struct drm_xe_engine_class_instance *eci) +{ + struct drm_xe_sync sync[1] = { + { .type = DRM_XE_SYNC_TYPE_USER_FENCE, + .flags = DRM_XE_SYNC_FLAG_SIGNAL, + .timeline_value = USER_FENCE_VALUE }, + }; + struct drm_xe_exec exec = { + .num_batch_buffer = 1, + .num_syncs = 1, + .syncs = to_user_pointer(sync), + }; + struct atomic_data *data; + uint32_t vm, exec_queue; + uint64_t addr; + size_t bo_size; + int va_bits, err; + int64_t timeout = QUARTER_SEC; + + va_bits = xe_va_bits(fd); + vm = xe_vm_create(fd, DRM_XE_VM_CREATE_FLAG_LR_MODE | + DRM_XE_VM_CREATE_FLAG_FAULT_MODE, 0); + + bo_size = xe_bb_size(fd, sizeof(*data)); + data = aligned_alloc(bo_size, bo_size); + igt_assert(data); + memset(data, 0, bo_size); + + addr = to_user_pointer(data); + + sync[0].addr = to_user_pointer(&data->vm_sync); + __xe_vm_bind_assert(fd, vm, 0, 0, 0, 0, 0x1ull << va_bits, + DRM_XE_VM_BIND_OP_MAP, + DRM_XE_VM_BIND_FLAG_CPU_ADDR_MIRROR, + sync, 1, 0, 0); + xe_wait_ufence(fd, &data->vm_sync, USER_FENCE_VALUE, 0, FIVE_SEC); + data->vm_sync = 0; + + xe_vm_madvise(fd, vm, addr, bo_size, 0, + DRM_XE_MEM_RANGE_ATTR_ATOMIC, DRM_XE_ATOMIC_CPU, 0, 0); + + atomic_build_batch(data, addr); + + exec_queue = xe_exec_queue_create(fd, vm, eci, 0); + exec.exec_queue_id = exec_queue; + exec.address = addr + ((char *)&data->batch - (char *)data); + + /* + * GPU MI_ATOMIC_INC must fail: page-fault handler returns -EACCES + * for ATOMIC_CPU mode, causing engine reset. Wait with a short + * timeout — the fence should not signal. + */ + sync[0].addr = to_user_pointer(&data->exec_sync); + xe_exec(fd, &exec); + err = __xe_wait_ufence(fd, &data->exec_sync, USER_FENCE_VALUE, + exec_queue, &timeout); + + igt_assert_neq(err, 0); + igt_assert_eq(data->data, 0); + + xe_exec_queue_destroy(fd, exec_queue); + __xe_vm_bind_assert(fd, vm, 0, 0, 0, 0, 0x1ull << va_bits, + DRM_XE_VM_BIND_OP_UNMAP, 0, NULL, 0, 0, 0); + free(data); + xe_vm_destroy(fd, vm); +} + int igt_main() { struct drm_xe_engine_class_instance *hwe; @@ -1030,6 +1103,16 @@ int igt_main() igt_subtest("atomic-global") xe_for_each_engine(fd, hwe) test_atomic_global(fd, hwe); + + /* Run on a single engine — each rejection triggers an engine + * reset and CAT error, running on all engines would generate + * redundant resets without adding coverage. + */ + igt_subtest("atomic-cpu") + xe_for_each_engine(fd, hwe) { + test_atomic_cpu(fd, hwe); + break; + } } igt_fixture() { -- 2.43.0