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 74565F433D2 for ; Wed, 15 Apr 2026 23:02:47 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 3D53210E770; Wed, 15 Apr 2026 23:02:47 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="Fq3uL0M6"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.12]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4560D10E0BA for ; Wed, 15 Apr 2026 23:02:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1776294162; x=1807830162; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=yES1X9/LGqsDKhtNoDGP3Ch2U48exhmH2x/MJCEkgGs=; b=Fq3uL0M6zdQ6lfTqh835NHF9r37nfW3FXlFg9NfPFpgQXQu95Hc5Z0V6 kZEO7LpqRH75y7QYCQ/xKLkyZJmA5SnLpVyPIN8JFuh5rXnmij/MLo3NG lXzaj9x7R1tWeCgBZUCeI2IE7VaRqHB3D03O8nhJW3pURJjKHxC9RG3jN zlYxEwmFVrILUtUQsfl91nCvXyrUv7IJZeJspcfTytSAjRFqDaz/HWg/F 5Fqs3XvF4r+5svox9WCy99490xnKKpDcP221oHvwFL4Zk+mqyAV6FKpY2 fp4qDHJ9RzIeLHqIX/oMsB/rVA5G9OAOqmFXeA2wjYGJ8Ek8hNpi6Ihcz Q==; X-CSE-ConnectionGUID: 0IDDXpUIR3OLdg76sToY1A== X-CSE-MsgGUID: 7YCmO3ZbSleQCEaLW9nKCg== X-IronPort-AV: E=McAfee;i="6800,10657,11760"; a="81165865" X-IronPort-AV: E=Sophos;i="6.23,181,1770624000"; d="scan'208";a="81165865" Received: from fmviesa004.fm.intel.com ([10.60.135.144]) by fmvoesa106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Apr 2026 16:02:41 -0700 X-CSE-ConnectionGUID: t5USXhCIQCKMFb34ZI2SnA== X-CSE-MsgGUID: T7GqYqDuTwCYhEsqmi9qbw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,181,1770624000"; d="scan'208";a="232287519" Received: from xwang-desk.fm.intel.com ([10.121.64.134]) by fmviesa004.fm.intel.com with ESMTP; 15 Apr 2026 16:02:41 -0700 From: Xin Wang To: intel-xe@lists.freedesktop.org Cc: Xin Wang , Matthew Auld , Matt Roper Subject: [PATCH v4 2/3] drm/xe/pat: Default XE_CACHE_NONE_COMPRESSION to invalid Date: Wed, 15 Apr 2026 16:02:39 -0700 Message-ID: <20260415230240.411826-3-x.wang@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260415230240.411826-1-x.wang@intel.com> References: <20260415230240.411826-1-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