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 B5603F433C7 for ; Thu, 16 Apr 2026 04:55:34 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 76C0410E7D4; Thu, 16 Apr 2026 04:55:34 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="Y6+JDfaq"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.16]) by gabe.freedesktop.org (Postfix) with ESMTPS id C6F3D10E179 for ; Thu, 16 Apr 2026 04:55:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1776315329; x=1807851329; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=yES1X9/LGqsDKhtNoDGP3Ch2U48exhmH2x/MJCEkgGs=; b=Y6+JDfaqKq3OCNGaBEPwIAffRNLLnpM0APGI8py/i5C5uWRr0StIT0Fg xeYjqjV0f/SC97++oK+cWFI+g6T/MSWvZatjCdbkI7lZONXccMHdd0Al0 10bdtqTN0xaPwRif3QHqt4PlWDRGvISBYPS3jrd046DS6+mU3jqimyP4n ltzmkzq9UzSkxA2XKzK4V7EHIo3veYs9SJVia02rgZsz7Xv9a5+5bIAtx ccxjTV2hip3W48tWG0bTnBj8ZhbXAT9IsR6c3xmNjVEvUB5XOb67JBAVO ygHQp6q9QdW5ltNg4Sm2TU1gjh3jgnuFXa20A7+pauDTn5PGMfEqZcs8y Q==; X-CSE-ConnectionGUID: AB1l7I1ASk6Lwf/nbqnMsQ== X-CSE-MsgGUID: s5FJA5mAS4Kq7Bf8+PKKiA== X-IronPort-AV: E=McAfee;i="6800,10657,11760"; a="77487478" X-IronPort-AV: E=Sophos;i="6.23,181,1770624000"; d="scan'208";a="77487478" Received: from fmviesa004.fm.intel.com ([10.60.135.144]) by orvoesa108.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Apr 2026 21:55:28 -0700 X-CSE-ConnectionGUID: YBOxFYlwToOFcFean572kA== X-CSE-MsgGUID: nIASI+q/RxaAvxWNrZ10zg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,181,1770624000"; d="scan'208";a="232356476" Received: from xwang-desk.fm.intel.com ([10.121.64.134]) by fmviesa004.fm.intel.com with ESMTP; 15 Apr 2026 21:55:27 -0700 From: Xin Wang To: intel-xe@lists.freedesktop.org Cc: Xin Wang , Matthew Auld , Matt Roper Subject: [PATCH v5 2/3] drm/xe/pat: Default XE_CACHE_NONE_COMPRESSION to invalid Date: Wed, 15 Apr 2026 21:55:25 -0700 Message-ID: <20260416045526.536497-3-x.wang@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260416045526.536497-1-x.wang@intel.com> References: <20260416045526.536497-1-x.wang@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" Initialize XE_CACHE_NONE_COMPRESSION PAT index to XE_PAT_INVALID_IDX by default, same as XE_CACHE_WB_COMPRESSION. Platforms that support this cache mode will override it in xe_pat_init_early(). This ensures that accidental use on unsupported platforms can be detected. A subsequent patch introduces a helper to assert on invalid PAT index access at all call sites. Suggested-by: Matthew Auld Cc: Matt Roper Reviewed-by: Matthew Auld Signed-off-by: Xin Wang --- drivers/gpu/drm/xe/xe_pat.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/xe/xe_pat.c b/drivers/gpu/drm/xe/xe_pat.c index 75aaae7b003d..fad5b5a5ed4a 100644 --- a/drivers/gpu/drm/xe/xe_pat.c +++ b/drivers/gpu/drm/xe/xe_pat.c @@ -559,6 +559,7 @@ static const struct xe_pat_ops xe3p_xpc_pat_ops = { void xe_pat_init_early(struct xe_device *xe) { xe->pat.idx[XE_CACHE_WB_COMPRESSION] = XE_PAT_INVALID_IDX; + xe->pat.idx[XE_CACHE_NONE_COMPRESSION] = XE_PAT_INVALID_IDX; if (GRAPHICS_VERx100(xe) == 3511) { xe->pat.ops = &xe3p_xpc_pat_ops; xe->pat.table = xe3p_xpc_pat_table; -- 2.43.0