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 8CD56F9D0F6 for ; Tue, 14 Apr 2026 21:14:55 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 4ED8810E0A6; Tue, 14 Apr 2026 21:14:55 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="Ocoo3qKy"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.11]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0B20810E0A6 for ; Tue, 14 Apr 2026 21:14:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1776201295; x=1807737295; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=yES1X9/LGqsDKhtNoDGP3Ch2U48exhmH2x/MJCEkgGs=; b=Ocoo3qKyMjSki6UTHSDL5xHaOpW4gVQa4f2i52iaFghxljhln87BHm6B V+TzZBb4W7V4+X9Bgx4cQqzZeDeCw7rQ76u/p1E2WOW3xhnRhCRWeDIat Hyw80zxNDzzkRYyIvKGq/6fFfCewmalA0tJa6MG3Uo6eXay78S6ZE0zbS IQX6XnVsfuUkkhsVt2KuTvXxeh+m7jyWvS89PWrdn/H0xsbX8W79bKESq QrKOA9Iql7bv1zA62++srbgAdJ1mVTYxltDd13V+U1LlcpLm39T3BYyLZ P0HuDI7KzpzkwAQoVWiydy1J+9TPiZUamoWRyuuhIycj1gU+bba34luom Q==; X-CSE-ConnectionGUID: i+D8mW07QYGo6wjvjJKMHg== X-CSE-MsgGUID: OB3d19MDQw2Xh1r5zwIvHg== X-IronPort-AV: E=McAfee;i="6800,10657,11759"; a="87795848" X-IronPort-AV: E=Sophos;i="6.23,179,1770624000"; d="scan'208";a="87795848" Received: from fmviesa002.fm.intel.com ([10.60.135.142]) by fmvoesa105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Apr 2026 14:14:54 -0700 X-CSE-ConnectionGUID: F/gVaaLrS1ereBjirqcCQg== X-CSE-MsgGUID: 6yzRx4fWSc6zrX/nFTpl9Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,179,1770624000"; d="scan'208";a="253422678" Received: from xwang-desk.fm.intel.com ([10.121.64.134]) by fmviesa002.fm.intel.com with ESMTP; 14 Apr 2026 14:14:54 -0700 From: Xin Wang To: intel-xe@lists.freedesktop.org Cc: Xin Wang , Matthew Auld , Matt Roper Subject: [PATCH v3 2/3] drm/xe/pat: Default XE_CACHE_NONE_COMPRESSION to invalid Date: Tue, 14 Apr 2026 14:14:52 -0700 Message-ID: <20260414211453.303679-3-x.wang@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260414211453.303679-1-x.wang@intel.com> References: <20260414211453.303679-1-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