From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.15]) (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 C941C372B32 for ; Fri, 27 Mar 2026 17:08:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.15 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774631292; cv=none; b=bGTh/1reMKCuTzz0jzHrq+HrywB9KodRmX66ZDhlQQ7HWSLG0SwgPkcKCp4RUhfbezTukdP+c/E4gbWKs6Ezmmv+tDregR8Bds+C9A4idUv3kmzwkBSrQtWf7HQI23s98lf5zPY77gsq510VVBZ8yqYC920jOno2TzTWebK/WKc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774631292; c=relaxed/simple; bh=jtoyvw8Q9Kn1mliaU05+k7f7HMXxYZSZkcjMw2THQKw=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Q8tOlvdOHPWINHOhg6WbiGHrjeSy72kB1ZSnKdJwiG0FdjB9rRVAudsskyog17kW8QOWzppydaYVMnNgwYXCeaWKYIaoP9oulaGBZniA6BzqJPWelUdBF8aZX1PsIe5zF++A3ODRYWBZvXZc/O929SMDlkEcMGOnoKjeBRztq0Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=k7ZqFK/q; arc=none smtp.client-ip=198.175.65.15 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="k7ZqFK/q" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1774631291; x=1806167291; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=jtoyvw8Q9Kn1mliaU05+k7f7HMXxYZSZkcjMw2THQKw=; b=k7ZqFK/q7639K+8yROpQBd3T91Q1vMXN/CfqMJ+QSwFMNu0xYjJN2r61 2eK4KAt9t769B1XnYPceylsRYdJ+UtUJgf/7CXz8f8RHFjXSQuSGgt4UR jBrxu6RtK4d7Tf3L39Z6KbAxjHanr22BHqrltmaCIychdbJ71tr8klYU5 x1xQynPfyzBEeq0JIaXa15AW+/uxoCmm3Np5vzcnzCQT9nx/MpwOtEhV+ BiNCirzDmH81s64YGXcQACMcvHyLSX3tIdbCOX+4uZ24TUNmcdsTG5xb7 qpgtsjMqUdCkQPp9yYGONKklrdjtxQkUWCX/5iH7e0QkwLMWpDMuT2xLw Q==; X-CSE-ConnectionGUID: pi/e1ReKTaGRi1xCzG3WzQ== X-CSE-MsgGUID: 5MgqkSJlRfeT+PD0hQW61A== X-IronPort-AV: E=McAfee;i="6800,10657,11742"; a="79315562" X-IronPort-AV: E=Sophos;i="6.23,144,1770624000"; d="scan'208";a="79315562" Received: from orviesa007.jf.intel.com ([10.64.159.147]) by orvoesa107.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Mar 2026 10:08:11 -0700 X-CSE-ConnectionGUID: LYmPpeheSTq93PgXWPCL/w== X-CSE-MsgGUID: U01MBGbdTn69g78mNXzj8g== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,144,1770624000"; d="scan'208";a="225625718" Received: from sghuge-mobl2.amr.corp.intel.com (HELO [10.125.110.180]) ([10.125.110.180]) by orviesa007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Mar 2026 10:08:10 -0700 Message-ID: <01236b78-2da5-4d51-a5cc-4619e11cf561@intel.com> Date: Fri, 27 Mar 2026 10:08:09 -0700 Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 8/9] tools/testing/cxl: Simulate auto-assembly failure To: Dan Williams Cc: patches@lists.linux.dev, linux-cxl@vger.kernel.org, alison.schofield@intel.com, Smita.KoralahalliChannabasappa@amd.com References: <20260327052821.440749-1-dan.j.williams@intel.com> <20260327052821.440749-9-dan.j.williams@intel.com> Content-Language: en-US From: Dave Jiang In-Reply-To: <20260327052821.440749-9-dan.j.williams@intel.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 3/26/26 10:28 PM, Dan Williams wrote: > Add a cxl_test module option to skip setting up one of the members of the > default auto-assembled region. > > This simulates a device failing between firmware setup and OS boot, or > region configuration interrupted by an event like kexec. > > Signed-off-by: Dan Williams Reviewed-by: Dave Jiang > --- > tools/testing/cxl/test/cxl.c | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/tools/testing/cxl/test/cxl.c b/tools/testing/cxl/test/cxl.c > index 81e2aef3627a..7deeb7ff7bdf 100644 > --- a/tools/testing/cxl/test/cxl.c > +++ b/tools/testing/cxl/test/cxl.c > @@ -16,6 +16,7 @@ > > static int interleave_arithmetic; > static bool extended_linear_cache; > +static bool fail_autoassemble; > > #define FAKE_QTG_ID 42 > > @@ -819,6 +820,12 @@ static void mock_init_hdm_decoder(struct cxl_decoder *cxld) > return; > } > > + /* Simulate missing cxl_mem.4 configuration */ > + if (hb0 && pdev->id == 4 && cxld->id == 0 && fail_autoassemble) { > + default_mock_decoder(cxld); > + return; > + } > + > base = window->base_hpa; > if (extended_linear_cache) > base += mock_auto_region_size; > @@ -1620,6 +1627,8 @@ module_param(interleave_arithmetic, int, 0444); > MODULE_PARM_DESC(interleave_arithmetic, "Modulo:0, XOR:1"); > module_param(extended_linear_cache, bool, 0444); > MODULE_PARM_DESC(extended_linear_cache, "Enable extended linear cache support"); > +module_param(fail_autoassemble, bool, 0444); > +MODULE_PARM_DESC(fail_autoassemble, "Simulate missing member of an auto-region"); > module_init(cxl_test_init); > module_exit(cxl_test_exit); > MODULE_LICENSE("GPL v2");