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 958EFCCA476 for ; Tue, 7 Oct 2025 20:49:00 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 56DDE10E389; Tue, 7 Oct 2025 20:49:00 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="TrV/AYau"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.16]) by gabe.freedesktop.org (Postfix) with ESMTPS id B8AE710E38D for ; Tue, 7 Oct 2025 20:48:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1759870130; x=1791406130; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=9pnOU8JtrEliZf5t2NwJ5Z1zgvoAeKYobiBHBRDDBsg=; b=TrV/AYauCF+j0xe5jDpnkPENx1B9tmPXolEpEtJIJjOh+sRQCyXnDfce kZOhIdE437cm2roXTfgJFJL0HXuFlUg4Ye7W6GIJrMXQ5N/pLzpzlL6Wo 1JZaj5MapW0zGGvqDqr23C/xr50dRM4zCyH4BJK+oeJAK0T1vB3DdlbLy JGsMqGMSdB5YjfJCLYtwDXQvauzEK6e0rwCGjpZLLy+NSPhuJ7oLMKRL7 U0uGT65FFYG50jxUckB/XxRIKTnIiZ60hy2uQ1nt88XCPPvSAxkbgW4Di ueiSNy2c9OADhDmDPQod/vsYZngr4YlRXhRnjpOTcBF/E4L1XJtB7bBXR g==; X-CSE-ConnectionGUID: Dr8RXj+yRxOBHMPb07Qh3g== X-CSE-MsgGUID: O42cqBo5Q2mbd38l6LG4zw== X-IronPort-AV: E=McAfee;i="6800,10657,11575"; a="49616746" X-IronPort-AV: E=Sophos;i="6.18,321,1751266800"; d="scan'208";a="49616746" Received: from fmviesa005.fm.intel.com ([10.60.135.145]) by fmvoesa110.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Oct 2025 13:48:49 -0700 X-CSE-ConnectionGUID: GD0umgpnS+awxJwgE7A7mA== X-CSE-MsgGUID: qDcY6cDfSc2jhKx3MLnSGg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.18,321,1751266800"; d="scan'208";a="184631084" Received: from mdroper-desk1.fm.intel.com ([10.1.39.133]) by fmviesa005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Oct 2025 13:48:48 -0700 From: Matt Roper To: intel-xe@lists.freedesktop.org Cc: matthew.d.roper@intel.com, Tejas Upadhyay Subject: [PATCH v4 09/23] drm/xe: Skip L2 / TDF cache flushes if primary GT is disabled Date: Tue, 7 Oct 2025 13:48:39 -0700 Message-ID: <20251007204829.1468209-34-matthew.d.roper@intel.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251007204829.1468209-25-matthew.d.roper@intel.com> References: <20251007204829.1468209-25-matthew.d.roper@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" If the primary GT is disabled via configfs, GT-side L2 and TD cache flushes are unnecessary since nothing is using/filling these caches. Signed-off-by: Matt Roper Reviewed-by: Tejas Upadhyay --- drivers/gpu/drm/xe/xe_device.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/xe/xe_device.c b/drivers/gpu/drm/xe/xe_device.c index 386940323630..d42d03b8ab3a 100644 --- a/drivers/gpu/drm/xe/xe_device.c +++ b/drivers/gpu/drm/xe/xe_device.c @@ -1062,6 +1062,8 @@ void xe_device_l2_flush(struct xe_device *xe) unsigned int fw_ref; gt = xe_root_mmio_gt(xe); + if (!gt) + return; if (!XE_GT_WA(gt, 16023588340)) return; @@ -1107,6 +1109,9 @@ void xe_device_td_flush(struct xe_device *xe) return; root_gt = xe_root_mmio_gt(xe); + if (!root_gt) + return; + if (XE_GT_WA(root_gt, 16023588340)) { /* A transient flush is not sufficient: flush the L2 */ xe_device_l2_flush(xe); -- 2.51.0