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 E94601CFEB3; Wed, 2 Oct 2024 14:26:49 +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=1727879210; cv=none; b=uXef5yQSx4Swvxd4LJ/5Tc9g/8er/p7tGaUtNT7F/3F9hgLE2oZ2rkYWwV92V+VWmnUQXQCaP59mDBMrgzJmanIT7ojiOzUa6wlaDWwfQ01J7uqukMXnzRMnh121exN7c5IiYWJ7UiGhWrt5xovKgVRaPAQB9Y3eEU2ntI4sE0E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727879210; c=relaxed/simple; bh=S+OGtZeO6pDfqJfM7nOvAm+dAcCKqt1XQHEwSe0IuNI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=k0R4pH8o8e8OsOy7KyPjvGAtHWiN6P++fFe6x6F/d+cv9IZ2BD5crJgZarWmtnyr3QypqkFgnx/4A6lpucQqrwLxz6yZ2uSdRprg1m/VS7DL4jjgF9/txUyvgd/oNZpnz1UbZzlecCHxZJ32HblBqgU+NAovoeN7RX//wPN7MPA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Vz0ziNNZ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Vz0ziNNZ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1534EC4CEC2; Wed, 2 Oct 2024 14:26:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1727879209; bh=S+OGtZeO6pDfqJfM7nOvAm+dAcCKqt1XQHEwSe0IuNI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Vz0ziNNZRLIEQjEUXkLRrUu2eQlIi+hiIsKiITlVek6avAfdsyYsWikqLMQi//Oja +iv/l9fkdBT/lrJvgjTOwNmx6qsQzEadNYw4fQ6IfSiR1cZIuDAUOjlzBAw3y6Kdr/ S9qSI7OBjp6JB38VW6HMuggvOm2rnNRjgM84PkQ4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Robin Murphy , Will Deacon , Sasha Levin Subject: [PATCH 6.6 041/538] perf/arm-cmn: Ensure dtm_idx is big enough Date: Wed, 2 Oct 2024 14:54:40 +0200 Message-ID: <20241002125753.650493217@linuxfoundation.org> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241002125751.964700919@linuxfoundation.org> References: <20241002125751.964700919@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Robin Murphy [ Upstream commit 359414b33e00bae91e4eabf3e4ef8e76024c7673 ] While CMN_MAX_DIMENSION was bumped to 12 for CMN-650, that only supports up to a 10x10 mesh, so bumping dtm_idx to 256 bits at the time worked out OK in practice. However CMN-700 did finally support up to 144 XPs, and thus needs a worst-case 288 bits of dtm_idx for an aggregated XP event on a maxed-out config. Oops. Fixes: 23760a014417 ("perf/arm-cmn: Add CMN-700 support") Signed-off-by: Robin Murphy Link: https://lore.kernel.org/r/e771b358526a0d7fc06efee2c3a2fdc0c9f51d44.1725296395.git.robin.murphy@arm.com Signed-off-by: Will Deacon Signed-off-by: Sasha Levin --- drivers/perf/arm-cmn.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c index 3926586685cb4..7d5e8cb96e9bf 100644 --- a/drivers/perf/arm-cmn.c +++ b/drivers/perf/arm-cmn.c @@ -35,6 +35,9 @@ #define CMN_MAX_XPS (CMN_MAX_DIMENSION * CMN_MAX_DIMENSION) #define CMN_MAX_DTMS (CMN_MAX_XPS + (CMN_MAX_DIMENSION - 1) * 4) +/* Currently XPs are the node type we can have most of; others top out at 128 */ +#define CMN_MAX_NODES_PER_EVENT CMN_MAX_XPS + /* The CFG node has various info besides the discovery tree */ #define CMN_CFGM_PERIPH_ID_01 0x0008 #define CMN_CFGM_PID0_PART_0 GENMASK_ULL(7, 0) @@ -565,7 +568,7 @@ static void arm_cmn_debugfs_init(struct arm_cmn *cmn, int id) {} struct arm_cmn_hw_event { struct arm_cmn_node *dn; - u64 dtm_idx[4]; + u64 dtm_idx[DIV_ROUND_UP(CMN_MAX_NODES_PER_EVENT * 2, 64)]; s8 dtc_idx[CMN_MAX_DTCS]; u8 num_dns; u8 dtm_offset; -- 2.43.0