From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BDA8A606A31A for ; Thu, 22 Oct 2026 13:32:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=intel.com header.i=@intel.com header.a=rsa-sha256 header.s=Intel header.b=Nz4Cm5v7 Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 80D851125DC; Thu, 22 Oct 2026 13:32:30 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.17]) by gabe.freedesktop.org (Postfix) with ESMTPS id 17D8F1125DC for ; Thu, 22 Oct 2026 13:32:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1792675945; x=1824211945; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=BqgzjV6P9JzbLinClQG9HB40dysZOYXYUc3/BgDlCz0=; b=Nz4Cm5v7wd/QPZsZNVFqpXdWaExV+oVs9sNyy0t4Pjd7ZmHL5mQJ4Qwp 4dRtw82XLh5QhQCyaO5ugoFmaoMa2QMANXqMPegbXk3rsgUVfOgp3oUgW Mrd9IXI2zH6o1gZcCsmIASIRklnAinYlL/KU57FTQCHHE5HSFGauADRAv /nIa5CDyC9AEl+n+U9SyK2ElzfdKmP+ug9qMOyKpSB+59WQKPcR0hta+A okx2oNoYPkhevqrA3mOdEijUBMuBRQGN77ArOHcZRu+pvL9lZ44sMHUcP 3YJGEphssWqP5gwb+rxlO6sthneC4ekQAsOSMZ58hv7Mz8+lf3nmsTz4K g==; X-CSE-ConnectionGUID: m6ga5MfNTEqw+aEB7Es0hQ== X-CSE-MsgGUID: o6KfLrTjT46PEXMbbBUJxg== X-IronPort-AV: E=McAfee;i="6800,10657,11942"; a="1439219" X-IronPort-AV: E=Sophos;i="6.27,172,1787036400"; d="scan'208";a="1439219" Received: from fmviesa001.fm.intel.com ([10.60.135.141]) by orvoesa109.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Oct 2026 06:32:24 -0700 X-CSE-ConnectionGUID: ypxs+0FbQ8C6DgezZvMSQA== X-CSE-MsgGUID: Xpg7yeKfTFaQZCdVUamFpQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,172,1787036400"; d="scan'208";a="3700760" Received: from gfx-coremm-kmd15.iind.intel.com ([10.223.55.8]) by fmviesa001.fm.intel.com with ESMTP; 22 Oct 2026 06:32:23 -0700 From: Nareshkumar Gollakoti To: intel-xe@lists.freedesktop.org Cc: tejas.upadhyay@intel.com, Nareshkumar Gollakoti Subject: [PATCH v5 0/7] drm/xe: Capture additional HW register state in devcoredump Date: Thu, 22 Oct 2026 18:59:50 +0530 Message-ID: <20261022132957.2479469-1-naresh.kumar.g@intel.com> X-Mailer: git-send-email 2.43.0 X-Archived-By: 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-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Intel-xe" X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 This series extends the Xe devcoredump with additional hardware register state to improve post-mortem debugging of GPU hangs and faults on Xe3p. Today the devcoredump captures GuC log/CT, engine and submission state. When triaging hangs it is often necessary to also know the static HW configuration (fuses), GuC status/error state, GAM page-fault reporting and L3 node status at the time of the hang. Collecting these at capture time makes the dump self-contained and avoids relying on separate probe-time logging. To do this, the series adds a small generic MMIO register-dump helper (descriptor list -> snapshot -> print/free) and uses it for several register groups. Each group is captured for both the primary GT and, where applicable, the media GT, and is gated to Xe3p (GRAPHICS_VER >= 35). Registers requiring MCR steering are read through xe_gt_mcr_unicast_read_any(); the remaining GAM registers use INSTANCE0 default steering and are read directly. Snapshots are allocated with GFP_ATOMIC as capture runs inside the dma_fence signalling section, matching the surrounding captures, and are freed in the existing devcoredump teardown path. Patches: 1 Add the generic reg-dump helpers and capture GT/media fuse registers. 2 Capture GT and media GuC status/error registers. 3 Print register offsets alongside names in the GuC engine capture output (32- and 64-bit), easing cross-reference with the bspec. 4 Capture the GAM page-fault report head/tail registers. 5 Add the TDL gfx registers to the XeHPG extended GuC capture list. 6 Capture L3 node status registers (MCR, read via unicast_read_any()). 7 Capture additional engine state registers Sample devcoredump output gains the following sections: **** GT Fuse Register Dump **** **** Media GT Fuse Register Dump **** **** GT GuC Register Dump **** **** Media GT GuC Register Dump **** **** GAM PF Report **** **** Node Status **** **** Additional engine state registers **** v3:(Sashiko) - Use the LOW_DW MMIO offset when printing combined 64-bit register values in capture snapshots - Preserve the existing coredump register-name format and append register address as trailing metadata - Replace the render is not awake message with raw POWERGATE_ENABLE bit-state output - Move engine-class-specific registers out of COMMON_BASE_ENGINE_INSTANCE into class-specific capture lists v4: - optimized APIs and reduced few structs(Tejas) - Fixed CI hook error v5: - Fixed Null derefence possibilities and ensured proper forcewake scope - refactor struct member documentation(Tejas) Nareshkumar Gollakoti (7): drm/xe/devcoredump: Capture GT fuse registers in devcoredump drm/xe/devcoredump: Add GuC register snapshot to devcoredump drm/xe/guc: Print register addresses in capture snapshot output drm/xe: dump GAM page fault report registers in devcoredump drm/xe/guc: add TDL,SLICE gfx registers to capture list drm/xe: capture L3 node status registers in devcoredump drm/xe/guc: capture additional engine state registers drivers/gpu/drm/xe/regs/xe_engine_regs.h | 22 ++ drivers/gpu/drm/xe/regs/xe_gt_regs.h | 13 + drivers/gpu/drm/xe/regs/xe_guc_regs.h | 5 + drivers/gpu/drm/xe/xe_devcoredump.c | 328 +++++++++++++++++++++- drivers/gpu/drm/xe/xe_devcoredump_types.h | 66 +++++ drivers/gpu/drm/xe/xe_guc_capture.c | 78 ++++- 6 files changed, 503 insertions(+), 9 deletions(-) -- 2.43.0