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 C4D46FD9E22 for ; Thu, 26 Feb 2026 23:26:52 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 70A3710E0CF; Thu, 26 Feb 2026 23:26:52 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="Epi7DvMi"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.14]) by gabe.freedesktop.org (Postfix) with ESMTPS id CC90910E0CF for ; Thu, 26 Feb 2026 23:26:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1772148411; x=1803684411; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=n4XUo+2Xvy8NJH5NPodUql7J6n8zxZ8+jB8Tv8Q+c1U=; b=Epi7DvMie68RSzZd+sdWHlQqJA+GpH+Q6n+WbJj5fnnNRKeIJXMLZW1E b2T2Zj6Ch30M4d/quOElafNpXV0UtV1yn8slU9DSzjZuZLNL3C0t7kNp+ RyfV8Ov/CPHoV6BhTwYjAlyEqvEPRwmUo88kieU+9p7L4T3N4o8GupkkZ nAC0goFxK0QpOJfabNmfzFPy5BDD5VppvUmP3B6sf+FNPpJ490Zie3LuW PWQKz8fZvmMIUcuLf9cS8DPoMYvndmkJJAjXz/KIqEZga9pqszMxf5kVE CWodloUVpYxjNKVFIteY22MwG6IfRuCjLOJvBHEAXlpQhm2O8Ie379cY1 Q==; X-CSE-ConnectionGUID: NZe6S3doQ66G2LIVrWwzJQ== X-CSE-MsgGUID: tJbBHtixRKqeg7Io6LQfhw== X-IronPort-AV: E=McAfee;i="6800,10657,11713"; a="77061619" X-IronPort-AV: E=Sophos;i="6.21,313,1763452800"; d="scan'208";a="77061619" Received: from orviesa004.jf.intel.com ([10.64.159.144]) by orvoesa106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Feb 2026 15:26:50 -0800 X-CSE-ConnectionGUID: h/uTrmcjR565aW80n3Ghww== X-CSE-MsgGUID: yUtMCYZuQM6BnXMH3m+ZYg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,313,1763452800"; d="scan'208";a="221230328" Received: from dut4480arlh.fm.intel.com ([10.105.8.53]) by orviesa004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Feb 2026 15:26:50 -0800 From: Stuart Summers To: Cc: shuicheng.lin@intel.com, matthew.d.roper@intel.com, intel-xe@lists.freedesktop.org, John Harrison , Stuart Summers Subject: [PATCH] drm/xe/guc: Add support for NPK as a GuC log target Date: Thu, 26 Feb 2026 23:26:48 +0000 Message-Id: <20260226232648.675128-1-stuart.summers@intel.com> X-Mailer: git-send-email 2.34.1 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" From: John Harrison GuC provides the ability to gather logs through a hardware interface called NPK. For certain debugging scenarios this can be advantageous over getting logs from memory (or in addition to). Add a hook for this alternate debugging mode via a configfs. This translates into a parameter passed to GuC during load time. v2: Convert to configfs from modparam (Matt) Signed-off-by: John Harrison Signed-off-by: Stuart Summers --- drivers/gpu/drm/xe/xe_configfs.c | 60 ++++++++++++++++++++++++++++++++ drivers/gpu/drm/xe/xe_configfs.h | 5 +++ drivers/gpu/drm/xe/xe_defaults.h | 1 + drivers/gpu/drm/xe/xe_guc.c | 7 +++- 4 files changed, 72 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/xe/xe_configfs.c b/drivers/gpu/drm/xe/xe_configfs.c index 078dee985d24..e0c21328af75 100644 --- a/drivers/gpu/drm/xe/xe_configfs.c +++ b/drivers/gpu/drm/xe/xe_configfs.c @@ -83,6 +83,16 @@ * * This attribute can only be set before binding to the device. * + * GuC log target: + * ------------- + * + * Set the destination for the GuC log. 0 - memory only (default), + * 1 - NPK only, 2 - memory + NPK. + * + * # echo 2 > /sys/kernel/config/xe/0000:03:00.0/guc_log_target + * + * This attribute can only be set before binding to the device. + * * Allowed GT types: * ----------------- * @@ -256,6 +266,7 @@ struct xe_config_group_device { struct config_group sriov; struct xe_config_device { + u8 guc_log_target; u64 gt_types_allowed; u64 engines_allowed; struct wa_bb ctx_restore_post_bb[XE_ENGINE_CLASS_MAX]; @@ -277,6 +288,7 @@ struct xe_config_group_device { }; static const struct xe_config_device device_defaults = { + .guc_log_target = XE_DEFAULT_GUC_LOG_TARGET, .gt_types_allowed = U64_MAX, .engines_allowed = U64_MAX, .survivability_mode = false, @@ -357,6 +369,37 @@ static bool is_bound(struct xe_config_group_device *dev) return ret; } +static ssize_t guc_log_target_show(struct config_item *item, char *page) +{ + struct xe_config_device *dev = to_xe_config_device(item); + + return sprintf(page, "%d\n", dev->guc_log_target); +} + +static ssize_t guc_log_target_store(struct config_item *item, const char *page, size_t len) +{ + struct xe_config_group_device *dev = to_xe_config_group_device(item); + u8 guc_log_target; + int ret; + + ret = kstrtou8(page, 0, &guc_log_target); + if (ret) + return ret; + +#define GUC_LOG_TARGET_MAX 2 + if (guc_log_target > GUC_LOG_TARGET_MAX) + return -EINVAL; +#undef GUC_LOG_TARGET_MAX + + guard(mutex)(&dev->lock); + if (is_bound(dev)) + return -EBUSY; + + dev->config.guc_log_target = guc_log_target; + + return len; +} + static ssize_t survivability_mode_show(struct config_item *item, char *page) { struct xe_config_device *dev = to_xe_config_device(item); @@ -814,6 +857,7 @@ CONFIGFS_ATTR(, ctx_restore_mid_bb); CONFIGFS_ATTR(, ctx_restore_post_bb); CONFIGFS_ATTR(, enable_psmi); CONFIGFS_ATTR(, engines_allowed); +CONFIGFS_ATTR(, guc_log_target); CONFIGFS_ATTR(, gt_types_allowed); CONFIGFS_ATTR(, survivability_mode); @@ -822,6 +866,7 @@ static struct configfs_attribute *xe_config_device_attrs[] = { &attr_ctx_restore_post_bb, &attr_enable_psmi, &attr_engines_allowed, + &attr_guc_log_target, &attr_gt_types_allowed, &attr_survivability_mode, NULL, @@ -1094,6 +1139,7 @@ static void dump_custom_dev_config(struct pci_dev *pdev, dev->config.attr_); \ } while (0) + PRI_CUSTOM_ATTR("%d", guc_log_target); PRI_CUSTOM_ATTR("%llx", gt_types_allowed); PRI_CUSTOM_ATTR("%llx", engines_allowed); PRI_CUSTOM_ATTR("%d", enable_psmi); @@ -1146,6 +1192,20 @@ bool xe_configfs_get_survivability_mode(struct pci_dev *pdev) return mode; } +u8 xe_configfs_get_guc_log_target(struct pci_dev *pdev) +{ + struct xe_config_group_device *dev = find_xe_config_group_device(pdev); + u8 target; + + if (!dev) + return device_defaults.guc_log_target; + + target = dev->config.guc_log_target; + config_group_put(&dev->group); + + return target; +} + static u64 get_gt_types_allowed(struct pci_dev *pdev) { struct xe_config_group_device *dev = find_xe_config_group_device(pdev); diff --git a/drivers/gpu/drm/xe/xe_configfs.h b/drivers/gpu/drm/xe/xe_configfs.h index 07d62bf0c152..fb5cb7c57e75 100644 --- a/drivers/gpu/drm/xe/xe_configfs.h +++ b/drivers/gpu/drm/xe/xe_configfs.h @@ -19,6 +19,7 @@ int xe_configfs_init(void); void xe_configfs_exit(void); void xe_configfs_check_device(struct pci_dev *pdev); bool xe_configfs_get_survivability_mode(struct pci_dev *pdev); +u8 xe_configfs_get_guc_log_target(struct pci_dev *pdev); bool xe_configfs_primary_gt_allowed(struct pci_dev *pdev); bool xe_configfs_media_gt_allowed(struct pci_dev *pdev); u64 xe_configfs_get_engines_allowed(struct pci_dev *pdev); @@ -38,6 +39,10 @@ static inline int xe_configfs_init(void) { return 0; } static inline void xe_configfs_exit(void) { } static inline void xe_configfs_check_device(struct pci_dev *pdev) { } static inline bool xe_configfs_get_survivability_mode(struct pci_dev *pdev) { return false; } +static inline u8 xe_configfs_get_guc_log_target(struct pci_dev *pdev) +{ + return XE_DEFAULT_GUC_LOG_TARGET; +} static inline bool xe_configfs_primary_gt_allowed(struct pci_dev *pdev) { return true; } static inline bool xe_configfs_media_gt_allowed(struct pci_dev *pdev) { return true; } static inline u64 xe_configfs_get_engines_allowed(struct pci_dev *pdev) { return U64_MAX; } diff --git a/drivers/gpu/drm/xe/xe_defaults.h b/drivers/gpu/drm/xe/xe_defaults.h index c8ae1d5f3d60..fbe670668a04 100644 --- a/drivers/gpu/drm/xe/xe_defaults.h +++ b/drivers/gpu/drm/xe/xe_defaults.h @@ -12,6 +12,7 @@ #else #define XE_DEFAULT_GUC_LOG_LEVEL 1 #endif +#define XE_DEFAULT_GUC_LOG_TARGET 0 #define XE_DEFAULT_PROBE_DISPLAY IS_ENABLED(CONFIG_DRM_XE_DISPLAY) #define XE_DEFAULT_VRAM_BAR_SIZE 0 diff --git a/drivers/gpu/drm/xe/xe_guc.c b/drivers/gpu/drm/xe/xe_guc.c index 54d2fc780127..d98d5d051f1b 100644 --- a/drivers/gpu/drm/xe/xe_guc.c +++ b/drivers/gpu/drm/xe/xe_guc.c @@ -73,13 +73,18 @@ static u32 guc_bo_ggtt_addr(struct xe_guc *guc, static u32 guc_ctl_debug_flags(struct xe_guc *guc) { + struct pci_dev *pdev = to_pci_dev(guc_to_xe(guc)->drm.dev); u32 level = xe_guc_log_get_level(&guc->log); u32 flags = 0; if (!GUC_LOG_LEVEL_IS_VERBOSE(level)) flags |= GUC_LOG_DISABLED; else - flags |= FIELD_PREP(GUC_LOG_VERBOSITY, GUC_LOG_LEVEL_TO_VERBOSITY(level)); + flags |= FIELD_PREP(GUC_LOG_VERBOSITY, + GUC_LOG_LEVEL_TO_VERBOSITY(level)); + + flags |= FIELD_PREP(GUC_LOG_DESTINATION, + xe_configfs_get_guc_log_target(pdev)); return flags; } -- 2.34.1