From patchwork Fri Oct 13 22:48:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Cromie X-Patchwork-Id: 13421855 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 80CF9CDB47E for ; Fri, 13 Oct 2023 22:49:33 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D8D6410E68B; Fri, 13 Oct 2023 22:48:56 +0000 (UTC) Received: from mail-il1-x131.google.com (mail-il1-x131.google.com [IPv6:2607:f8b0:4864:20::131]) by gabe.freedesktop.org (Postfix) with ESMTPS id 04D1010E67B; Fri, 13 Oct 2023 22:48:50 +0000 (UTC) Received: by mail-il1-x131.google.com with SMTP id e9e14a558f8ab-35135f69de2so9146975ab.2; Fri, 13 Oct 2023 15:48:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1697237329; x=1697842129; darn=lists.freedesktop.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=gKUPZJG7I4VMa4iERW/Xn8lzZwDxy57eOqc/z/Cxr40=; b=GJJDBiewk/ZhGhSPpsVGb/xJ+NfJnn9iL5TU0LejL3ObmIl/+M0GfBNc7MQyyz6nxI aW8CG2y3OK6il85HPY/S/DM2mBcQztc3DpvKP2bP+g8KSO58+E5AE6YJM4xyesV+4jkI L1j2j2zNXS5jSfJ5tOHtFWxBHLvuo/gIPfHW7frNTqHlM983SDr7Hv0QDveQwuvBcODq e9IequOrcyRF0DdsycIhhC/qyDxvWWcgdr/hfVD/rGxf+Z9xyWhxdGv7GnewA+6buBbr +je4Y6mfA6K8C80tiinOeyT0QkeNy8mfLP2CBTbffaSMVwf5AcFRYKG+Ylm9k+qO4xIW c9Uw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1697237329; x=1697842129; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=gKUPZJG7I4VMa4iERW/Xn8lzZwDxy57eOqc/z/Cxr40=; b=WrClfZrLgSSMIFmJZVN5lswjqFZoSehscRoTINXqxY+BZWFR5G8Kp9OOASw1vPbcic UJBKFf7liQqXTMB7cRhg779Bu5rLQyuGobIHW1M4mvylEVJSfswMNWSQmi1pw40pbSgF T5Bk8tsRGoHavLRGGWlECz7SujznjJxF9tSQ9aFl9maFCpH02ViZaDo5gN94RV9OIAY5 KN3saROVYC7YNhueznBBBOUoHjapK1dPcgwMPLgAZLaSi0J89NiRUR9MyuhQL2Sk4YOp 2zW3JHNzuQb/bXyS+vlY2mR1OdHYL47svCvYtB02u9634P5vS2g3gEIRJvC+fOp510kU Xy8A== X-Gm-Message-State: AOJu0Yzl+4RMnmZEjAGH7VSgOL/K7hyvDOUMfnmpqDlj6+LJi44lTPVS nCN3zjp1oGox4ApJoEHgTWc= X-Google-Smtp-Source: AGHT+IGSKIllwM49YRqlNVGZtgj+TN/j6aWgVZnO86Ra+J1BMtA4A7WNswHWnbyBVDbd9A7EaPausA== X-Received: by 2002:a92:c7d1:0:b0:357:47a3:adb8 with SMTP id g17-20020a92c7d1000000b0035747a3adb8mr9967408ilk.29.1697237329218; Fri, 13 Oct 2023 15:48:49 -0700 (PDT) Received: from frodo.. (c-73-78-62-130.hsd1.co.comcast.net. [73.78.62.130]) by smtp.googlemail.com with ESMTPSA id t10-20020a92dc0a000000b003512c3e8809sm1683071iln.71.2023.10.13.15.48.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Oct 2023 15:48:48 -0700 (PDT) From: Jim Cromie To: linux-kernel@vger.kernel.org, jbaron@akamai.com, gregkh@linuxfoundation.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH v7b 16/25] dyndbg: refactor ddebug_classparam_clamp_input Date: Fri, 13 Oct 2023 16:48:08 -0600 Message-ID: <20231013224818.3456409-17-jim.cromie@gmail.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231013224818.3456409-1-jim.cromie@gmail.com> References: <20231013224818.3456409-1-jim.cromie@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: lb@semihalf.com, groeck@google.com, linux-doc@vger.kernel.org, jani.nikula@intel.com, daniel.vetter@ffwll.ch, linux@rasmusvillemoes.dk, mcgrof@kernel.org, seanpaul@chromium.org, joe@perches.com, bleung@google.com, yanivt@google.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Extract input validation code, from param_set_dyndbg_module_classes() (the sys-node >handler) to new: ddebug_classparam_clamp_input(kp), call it from former. It takes kernel-param arg, so it can complain about "foo: bad input". Reuse ddparam_clamp_input(kp) in ddebug_sync_classbits(), to validate inputs from parent's params, just like our own. To support that reuse, alter ddebug_sync_classbits() and caller to pass kp instead of kp->arg. Signed-off-by: Jim Cromie --- lib/dynamic_debug.c | 70 ++++++++++++++++++++++++++++++--------------- 1 file changed, 47 insertions(+), 23 deletions(-) diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c index c11feca70d6f..17eefb35ac96 100644 --- a/lib/dynamic_debug.c +++ b/lib/dynamic_debug.c @@ -656,6 +656,30 @@ static int ddebug_apply_class_bitmap(const struct ddebug_class_param *dcp, #define CLASSMAP_BITMASK(width) ((1UL << (width)) - 1) +static void ddebug_class_param_clamp_input(unsigned long *inrep, const struct kernel_param *kp) +{ + const struct ddebug_class_param *dcp = kp->arg; + const struct ddebug_class_map *map = dcp->map; + + switch (map->map_type) { + case DD_CLASS_TYPE_DISJOINT_BITS: + /* expect bits. mask and warn if too many */ + if (*inrep & ~CLASSMAP_BITMASK(map->length)) { + pr_warn("%s: input: 0x%lx exceeds mask: 0x%lx, masking\n", + KP_NAME(kp), *inrep, CLASSMAP_BITMASK(map->length)); + *inrep &= CLASSMAP_BITMASK(map->length); + } + break; + case DD_CLASS_TYPE_LEVEL_NUM: + /* input is bitpos, of highest verbosity to be enabled */ + if (*inrep > map->length) { + pr_warn("%s: level:%ld exceeds max:%d, clamping\n", + KP_NAME(kp), *inrep, map->length); + *inrep = map->length; + } + break; + } +} static int param_set_dyndbg_module_classes(const char *instr, const struct kernel_param *kp, const char *modnm) @@ -674,26 +698,15 @@ static int param_set_dyndbg_module_classes(const char *instr, pr_err("expecting numeric input, not: %s > %s\n", instr, KP_NAME(kp)); return -EINVAL; } + ddebug_class_param_clamp_input(&inrep, kp); switch (map->map_type) { case DD_CLASS_TYPE_DISJOINT_BITS: - /* expect bits. mask and warn if too many */ - if (inrep & ~CLASSMAP_BITMASK(map->length)) { - pr_warn("%s: input: 0x%lx exceeds mask: 0x%lx, masking\n", - KP_NAME(kp), inrep, CLASSMAP_BITMASK(map->length)); - inrep &= CLASSMAP_BITMASK(map->length); - } v2pr_info("bits:0x%lx > %s.%s\n", inrep, modnm ?: "*", KP_NAME(kp)); totct += ddebug_apply_class_bitmap(dcp, &inrep, *dcp->bits, modnm); *dcp->bits = inrep; break; case DD_CLASS_TYPE_LEVEL_NUM: - /* input is bitpos, of highest verbosity to be enabled */ - if (inrep > map->length) { - pr_warn("%s: level:%ld exceeds max:%d, clamping\n", - KP_NAME(kp), inrep, map->length); - inrep = map->length; - } old_bits = CLASSMAP_BITMASK(*dcp->lvl); new_bits = CLASSMAP_BITMASK(inrep); v2pr_info("lvl:%ld bits:0x%lx > %s\n", inrep, new_bits, KP_NAME(kp)); @@ -1160,16 +1173,27 @@ static const char * const ddebug_classmap_typenames[] = { ddebug_classmap_typenames[_cm->map_type]); \ }) -static void ddebug_sync_classbits(const struct ddebug_class_param *dcp, const char *modname) +static void ddebug_sync_classbits(const struct kernel_param *kp, const char *modname) { - /* clamp initial bitvec, mask off hi-bits */ - if (*dcp->bits & ~CLASSMAP_BITMASK(dcp->map->length)) { - *dcp->bits &= CLASSMAP_BITMASK(dcp->map->length); - v2pr_info("preset classbits: %lx\n", *dcp->bits); + struct ddebug_class_param *dcp = kp->arg; + unsigned long new_bits; + + ddebug_class_param_clamp_input(dcp->bits, kp); + + switch (dcp->map->map_type) { + case DD_CLASS_TYPE_DISJOINT_BITS: + v2pr_info(" %s: classbits: 0x%lx\n", KP_NAME(kp), *dcp->bits); + ddebug_apply_class_bitmap(dcp, dcp->bits, 0UL, modname); + break; + case DD_CLASS_TYPE_LEVEL_NUM: + new_bits = CLASSMAP_BITMASK(*dcp->lvl); + v2pr_info(" %s: lvl:%ld bits:0x%lx\n", KP_NAME(kp), *dcp->lvl, new_bits); + ddebug_apply_class_bitmap(dcp, &new_bits, 0UL, modname); + break; + default: + pr_err("bad map type %d\n", dcp->map->map_type); + return; } - /* force class'd prdbgs (in USEr module) to match (DEFINEr module) class-param */ - ddebug_apply_class_bitmap(dcp, dcp->bits, ~0, modname); - ddebug_apply_class_bitmap(dcp, dcp->bits, 0, modname); } static void ddebug_match_apply_kparam(const struct kernel_param *kp, @@ -1184,9 +1208,9 @@ static void ddebug_match_apply_kparam(const struct kernel_param *kp, dcp = (struct ddebug_class_param *)kp->arg; if (map == dcp->map) { - v2pr_info("found kp:%s =0x%lx", kp->name, *dcp->bits); - vpr_cm_info(map, "mapped to:"); - ddebug_sync_classbits(dcp, modnm); + v2pr_info(" found kp:%s =0x%lx", kp->name, *dcp->bits); + vpr_cm_info(map, " mapped to:"); + ddebug_sync_classbits(kp, modnm); } }