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 969D7F9D0EC for ; Tue, 14 Apr 2026 18:15:33 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5AD0110E089; Tue, 14 Apr 2026 18:15:33 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="YEJfZ5dc"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.11]) by gabe.freedesktop.org (Postfix) with ESMTPS id 17F9C10E063 for ; Tue, 14 Apr 2026 18:15:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1776190532; x=1807726532; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=yES1X9/LGqsDKhtNoDGP3Ch2U48exhmH2x/MJCEkgGs=; b=YEJfZ5dcUi66p6o9PeSdaxMcf8FRh/dnxK/FNTrQXHkygJ/SXwG+oycl wrQCl8IEfp10d/+p+XN0bqeO1IwGlcNdzbv56owvhr+d6g8yJC10O2KPS +XnJ0RUH7P/spJVYVLlk4Nz7PYKFfGVvqw76fjOHl+uTPtu+Gv1b9+q/B nze8cJMwCYfB5whkzmvBBoRRlfyZ2/kqaqgDXubRM26PKHrv3LnSAjA/G Vxft8r1W6ZwgdLQORTKoQ2hetBxXAzFjiSFucAXbVLWKFo1BlN4fx/PrS Mt4eI2ihPFxPVWGV+kNC39bXJMGkgxHLcPd/wz6B7GeTIUJilwrwF7Ghm g==; X-CSE-ConnectionGUID: zhWgTUyjQS2vXaoOcWjT7g== X-CSE-MsgGUID: DoFPuaViS6SLbqYmxBeTCA== X-IronPort-AV: E=McAfee;i="6800,10657,11759"; a="87464708" X-IronPort-AV: E=Sophos;i="6.23,179,1770624000"; d="scan'208";a="87464708" Received: from fmviesa002.fm.intel.com ([10.60.135.142]) by orvoesa103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Apr 2026 11:15:31 -0700 X-CSE-ConnectionGUID: 9IMsH8oDROKRjKpjJZ8PXw== X-CSE-MsgGUID: D3echMH5QTiBvncTvO4Jfg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,179,1770624000"; d="scan'208";a="253387937" Received: from xwang-desk.fm.intel.com ([10.121.64.134]) by fmviesa002.fm.intel.com with ESMTP; 14 Apr 2026 11:15:31 -0700 From: Xin Wang To: intel-xe@lists.freedesktop.org Cc: Xin Wang , Matthew Auld , Matt Roper Subject: [PATCH v2 2/3] drm/xe/pat: Default XE_CACHE_NONE_COMPRESSION to invalid Date: Tue, 14 Apr 2026 11:15:27 -0700 Message-ID: <20260414181528.282398-3-x.wang@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260414181528.282398-1-x.wang@intel.com> References: <20260414181528.282398-1-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