From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8C3774F30CE; Sat, 5 Sep 2026 18:13:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788632020; cv=none; b=e0XwSYzH15k+tolR1UwDZxV2k4AMl1C9BAl+epj9SabPRDeyD7K9dzWehpDxSuKs5WgsoS6R4koUJVbNsIaTTk3GQHtP3e+I+UxSj/g1NpcAYWMx6zoEpPlR/a9tePltBX4ALzyOF1o3PQj4Nl0GGlLlC7bYVlT5M3BRTw9V8PM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788632020; c=relaxed/simple; bh=RSw5o1xgKCoo1dJ08Kg1Z5PCGcfPAJMSdIT3pzgp3aw=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=ONc1MrGTsLzXL+smRUZ2+e+Vn3ZCMzds9kaVzuLrLC0t73MJuInCqNWxtJ47lV73Jqo1KNTKDOMdkZ+sTQaNZIXoPZQ0jgugy5w7z7QxNenia6RI8YJIqardMC4cG/I9pRV1p9R9AeBsnuqmIMsc+hTrgksqwHOjQT47aE5OEto= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=t27HNNFF; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="t27HNNFF" Received: by smtp.kernel.org (Postfix) with ESMTPS id 692FBC2BCF4; Sat, 5 Sep 2026 18:13:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1788632020; bh=RSw5o1xgKCoo1dJ08Kg1Z5PCGcfPAJMSdIT3pzgp3aw=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=t27HNNFFRZUb9frmqS5MhpUjRLpRrHWsXBpQe0klKUTcQmY/Ysa5YA7K7E5bbeSJs cVzx/PqSGlbae6J/0STGP1t9u1ZQ5v/pXrmERA0MR4iu4faCvvfdafWs/3jTmPxQGJ tU5SKNJ5vsYeWrIGzpxqDOgXr+iWYZGpHshzC02Jb4+l9hEbR9TDllMT27dkG42J2M YcWJkDbvnaJeuvzIC+YfXsKfPP2HU+96WaGRpZ1gZ2TJ4dYyEOByF+VDG564itK+Qa inJb7CFWVCWlxW6a/FUzlGn8QCPpm98UrxMhFqnE0s2yaDJ8d2gcVtMJazq9H7eJs7 wTC+8OUyW3+5Q== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4DD0BC624DB; Sat, 5 Sep 2026 18:13:40 +0000 (UTC) From: Jim Cromie via B4 Relay Date: Sat, 05 Sep 2026 12:13:27 -0600 Subject: [PATCH v8 13/43] dyndbg-API: remove DD_CLASS_TYPE_(DISJOINT|LEVEL)_NAMES and code Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260905-dd-cmap-part2-clean-v8-13-a4cc0674f6fd@gmail.com> References: <20260905-dd-cmap-part2-clean-v8-0-a4cc0674f6fd@gmail.com> In-Reply-To: <20260905-dd-cmap-part2-clean-v8-0-a4cc0674f6fd@gmail.com> To: Jason Baron , Shuah Khan , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Arnd Bergmann , Luis Chamberlain , Petr Pavlu , Daniel Gomez , Sami Tolvanen , Aaron Tomlin , Andrew Morton , Jonathan Corbet , Shuah Khan , Greg Kroah-Hartman , Nathan Chancellor , Nicolas Schier Cc: linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arch@vger.kernel.org, linux-modules@vger.kernel.org, linux-doc@vger.kernel.org, linux-kbuild@vger.kernel.org, Jim Cromie , Louis Chauvet X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1788632017; l=9445; i=jim.cromie@gmail.com; s=20260203; h=from:subject:message-id; bh=yDvzvB8YVbmO6VW0QKeb3yhTVxl3ejf4y3zaiiJFZSM=; b=SemczUtadf0DiZAEhreh/v2IhnROyOt9oyDoGRd/008ljs2/guDwfDPrV5uEX3RAiljrqvN/X tUAzhJOM+GRBS49hbWiHGFJDgz9mXbf1kJmztWsgobBaLvHylmsmo8u X-Developer-Key: i=jim.cromie@gmail.com; a=ed25519; pk=C6E5ODlPQo7ZBynATXH9wg7K6HxP0pIXyf4s38Qw0XE= X-Endpoint-Received: by B4 Relay for jim.cromie@gmail.com/20260203 with auth_id=958 X-Original-From: Jim Cromie Reply-To: jim.cromie@gmail.com From: Jim Cromie Remove the DD_CLASS_TYPE_*_NAMES classmap types and code. These 2 classmap types accept class names at the PARAM interface, for example: echo +DRM_UT_CORE,-DRM_UT_KMS > /sys/module/drm/parameters/debug_names The code works, but its only used by test-dynamic-debug, and wasn't asked for by anyone else, so reduce LOC & test-surface; simplify things. Also rename enum class_map_type to enum ddebug_class_map_type. Signed-off-by: Jim Cromie Reviewed-by: Louis Chauvet --- v3: fix name of enum in kdoc also change name of struct (to future name) v2: move RvB after SoB respect const instr in param_set_dyndbg_module_classes, return -EINVAL on classtype err. --- include/linux/dynamic_debug.h | 28 ++++--------- lib/dynamic_debug.c | 98 +++---------------------------------------- lib/test_dynamic_debug.c | 26 ------------ 3 files changed, 15 insertions(+), 137 deletions(-) diff --git a/include/linux/dynamic_debug.h b/include/linux/dynamic_debug.h index a10adac8e8f0..9607121c3072 100644 --- a/include/linux/dynamic_debug.h +++ b/include/linux/dynamic_debug.h @@ -59,27 +59,17 @@ struct _ddebug { #endif } __attribute__((aligned(8))); -enum class_map_type { +enum ddebug_class_map_type { DD_CLASS_TYPE_DISJOINT_BITS, /** - * DD_CLASS_TYPE_DISJOINT_BITS: classes are independent, one per bit. - * expecting hex input. Built for drm.debug, basis for other types. + * DD_CLASS_TYPE_DISJOINT_BITS: classes are independent, + * mapped to bits[0..N]. Expects hex input. Built for + * drm.debug, basis for other types. */ DD_CLASS_TYPE_LEVEL_NUM, /** - * DD_CLASS_TYPE_LEVEL_NUM: input is numeric level, 0-N. - * N turns on just bits N-1 .. 0, so N=0 turns all bits off. - */ - DD_CLASS_TYPE_DISJOINT_NAMES, - /** - * DD_CLASS_TYPE_DISJOINT_NAMES: input is a CSV of [+-]CLASS_NAMES, - * classes are independent, like _DISJOINT_BITS. - */ - DD_CLASS_TYPE_LEVEL_NAMES, - /** - * DD_CLASS_TYPE_LEVEL_NAMES: input is a CSV of [+-]CLASS_NAMES, - * intended for names like: INFO,DEBUG,TRACE, with a module prefix - * avoid EMERG,ALERT,CRIT,ERR,WARNING: they're not debug + * DD_CLASS_TYPE_LEVEL_NUM: input is numeric level, 0..N. + * Input N turns on bits 0..N-1 */ }; @@ -90,7 +80,7 @@ struct ddebug_class_map { const char **class_names; const int length; const int base; /* index of 1st .class_id, allows split/shared space */ - enum class_map_type map_type; + enum ddebug_class_map_type map_type; }; /* encapsulate linker provided built-in (or module) dyndbg data */ @@ -119,8 +109,8 @@ struct ddebug_class_param { /** * DECLARE_DYNDBG_CLASSMAP - declare classnames known by a module - * @_var: a struct ddebug_class_map, passed to module_param_cb - * @_type: enum class_map_type, chooses bits/verbose, numeric/symbolic + * @_var: a struct _ddebug_class_map, passed to module_param_cb + * @_maptype: enum ddebug_class_map_type, chooses bits/verbose * @_base: offset of 1st class-name. splits .class_id space * @classes: class-names used to control class'd prdbgs */ diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c index 8d710c74309a..cb768157db08 100644 --- a/lib/dynamic_debug.c +++ b/lib/dynamic_debug.c @@ -653,76 +653,6 @@ static int ddebug_apply_class_bitmap(const struct ddebug_class_param *dcp, #define CLASSMAP_BITMASK(width) ((1UL << (width)) - 1) -/* accept comma-separated-list of [+-] classnames */ -static int param_set_dyndbg_classnames(const char *instr, const struct kernel_param *kp) -{ - const struct ddebug_class_param *dcp = kp->arg; - const struct ddebug_class_map *map = dcp->map; - unsigned long curr_bits, old_bits; - char *cl_str, *p, *tmp; - int cls_id, totct = 0; - bool wanted; - - cl_str = tmp = kstrdup_and_replace(instr, '\n', '\0', GFP_KERNEL); - if (!tmp) - return -ENOMEM; - - /* start with previously set state-bits, then modify */ - curr_bits = old_bits = *dcp->bits; - vpr_info("\"%s\" > %s:0x%lx\n", cl_str, KP_NAME(kp), curr_bits); - - for (; cl_str; cl_str = p) { - p = strchr(cl_str, ','); - if (p) - *p++ = '\0'; - - if (*cl_str == '-') { - wanted = false; - cl_str++; - } else { - wanted = true; - if (*cl_str == '+') - cl_str++; - } - cls_id = match_string(map->class_names, map->length, cl_str); - if (cls_id < 0) { - pr_err("%s unknown to %s\n", cl_str, KP_NAME(kp)); - continue; - } - - /* have one or more valid class_ids of one *_NAMES type */ - switch (map->map_type) { - case DD_CLASS_TYPE_DISJOINT_NAMES: - /* the +/- pertains to a single bit */ - if (test_bit(cls_id, &curr_bits) == wanted) { - v3pr_info("no change on %s\n", cl_str); - continue; - } - curr_bits ^= BIT(cls_id); - totct += ddebug_apply_class_bitmap(dcp, &curr_bits, dcp->bits); - *dcp->bits = curr_bits; - v2pr_info("%s: changed bit %d:%s\n", KP_NAME(kp), cls_id, - map->class_names[cls_id]); - break; - case DD_CLASS_TYPE_LEVEL_NAMES: - /* cls_id = N in 0..max. wanted +/- determines N or N-1 */ - old_bits = CLASSMAP_BITMASK(*dcp->lvl); - curr_bits = CLASSMAP_BITMASK(cls_id + (wanted ? 1 : 0 )); - - totct += ddebug_apply_class_bitmap(dcp, &curr_bits, &old_bits); - *dcp->lvl = (cls_id + (wanted ? 1 : 0)); - v2pr_info("%s: changed bit-%d: \"%s\" %lx->%lx\n", KP_NAME(kp), cls_id, - map->class_names[cls_id], old_bits, curr_bits); - break; - default: - pr_err("illegal map-type value %d\n", map->map_type); - } - } - kfree(tmp); - vpr_info("total matches: %d\n", totct); - return 0; -} - /** * param_set_dyndbg_classes - class FOO >control * @instr: string echo>d to sysfs, input depends on map_type @@ -741,28 +671,15 @@ int param_set_dyndbg_classes(const char *instr, const struct kernel_param *kp) unsigned long inrep, new_bits, old_bits; int rc, totct = 0; - switch (map->map_type) { - - case DD_CLASS_TYPE_DISJOINT_NAMES: - case DD_CLASS_TYPE_LEVEL_NAMES: - /* handle [+-]classnames list separately, we are done here */ - return param_set_dyndbg_classnames(instr, kp); + rc = kstrtoul(instr, 0, &inrep); + if (rc) { + int len = strcspn(instr, "\n"); - case DD_CLASS_TYPE_DISJOINT_BITS: - case DD_CLASS_TYPE_LEVEL_NUM: - /* numeric input, accept and fall-thru */ - rc = kstrtoul(instr, 0, &inrep); - if (rc) { - pr_err("expecting numeric input: %s > %s\n", instr, KP_NAME(kp)); - return -EINVAL; - } - break; - default: - pr_err("%s: bad map type: %d\n", KP_NAME(kp), map->map_type); + pr_err("expecting numeric input, not: %.*s > %s\n", + len, instr, KP_NAME(kp)); return -EINVAL; } - /* only _BITS,_NUM (numeric) map-types get here */ switch (map->map_type) { case DD_CLASS_TYPE_DISJOINT_BITS: /* expect bits. mask and warn if too many */ @@ -790,6 +707,7 @@ int param_set_dyndbg_classes(const char *instr, const struct kernel_param *kp) break; default: pr_warn("%s: bad map type: %d\n", KP_NAME(kp), map->map_type); + return -EINVAL; } vpr_info("%s: total matches: %d\n", KP_NAME(kp), totct); return 0; @@ -811,12 +729,8 @@ int param_get_dyndbg_classes(char *buffer, const struct kernel_param *kp) const struct ddebug_class_map *map = dcp->map; switch (map->map_type) { - - case DD_CLASS_TYPE_DISJOINT_NAMES: case DD_CLASS_TYPE_DISJOINT_BITS: return scnprintf(buffer, PAGE_SIZE, "0x%lx\n", *dcp->bits); - - case DD_CLASS_TYPE_LEVEL_NAMES: case DD_CLASS_TYPE_LEVEL_NUM: return scnprintf(buffer, PAGE_SIZE, "%d\n", *dcp->lvl); default: diff --git a/lib/test_dynamic_debug.c b/lib/test_dynamic_debug.c index 77c2a669b6af..74d183ebf3e0 100644 --- a/lib/test_dynamic_debug.c +++ b/lib/test_dynamic_debug.c @@ -74,13 +74,6 @@ DECLARE_DYNDBG_CLASSMAP(map_disjoint_bits, DD_CLASS_TYPE_DISJOINT_BITS, 0, DD_SYS_WRAP(disjoint_bits, p); DD_SYS_WRAP(disjoint_bits, T); -/* symbolic input, independent bits */ -enum cat_disjoint_names { LOW = 11, MID, HI }; -DECLARE_DYNDBG_CLASSMAP(map_disjoint_names, DD_CLASS_TYPE_DISJOINT_NAMES, 10, - "LOW", "MID", "HI"); -DD_SYS_WRAP(disjoint_names, p); -DD_SYS_WRAP(disjoint_names, T); - /* numeric verbosity, V2 > V1 related */ enum cat_level_num { V0 = 14, V1, V2, V3, V4, V5, V6, V7 }; DECLARE_DYNDBG_CLASSMAP(map_level_num, DD_CLASS_TYPE_LEVEL_NUM, 14, @@ -88,13 +81,6 @@ DECLARE_DYNDBG_CLASSMAP(map_level_num, DD_CLASS_TYPE_LEVEL_NUM, 14, DD_SYS_WRAP(level_num, p); DD_SYS_WRAP(level_num, T); -/* symbolic verbosity */ -enum cat_level_names { L0 = 22, L1, L2, L3, L4, L5, L6, L7 }; -DECLARE_DYNDBG_CLASSMAP(map_level_names, DD_CLASS_TYPE_LEVEL_NAMES, 22, - "L0", "L1", "L2", "L3", "L4", "L5", "L6", "L7"); -DD_SYS_WRAP(level_names, p); -DD_SYS_WRAP(level_names, T); - /* stand-in for all pr_debug etc */ #define prdbg(SYM) __pr_debug_cls(SYM, #SYM " msg\n") @@ -102,10 +88,6 @@ static void do_cats(void) { pr_debug("doing categories\n"); - prdbg(LOW); - prdbg(MID); - prdbg(HI); - prdbg(D2_CORE); prdbg(D2_DRIVER); prdbg(D2_KMS); @@ -129,14 +111,6 @@ static void do_levels(void) prdbg(V5); prdbg(V6); prdbg(V7); - - prdbg(L1); - prdbg(L2); - prdbg(L3); - prdbg(L4); - prdbg(L5); - prdbg(L6); - prdbg(L7); } static void do_prints(void) -- 2.55.0