From patchwork Thu Aug 20 09:20:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 265321 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4D12DC433EC for ; Thu, 20 Aug 2020 13:23:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1DA18208DB for ; Thu, 20 Aug 2020 13:23:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597929782; bh=0pkLbZ3ecE1PW8MfK1EZfq9ZmaccVL2nFYhP+U3ugMU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=F7rBtkb0o0KyPM5I5j+YzFbxum4SKY1LKgoGUC0dfyg2eqgX9wVozvO8zKqtnyeEG qeWD4tQZMKrEB9lnCncrOvbmJkKn75qXNfWnncXb+pWn7A+nSbaUEqoDxuTOy1t+YY o9F9ZlohMmiNIqUD1GXuMe8tTDpHUd35gqNvmx+I= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729600AbgHTNXA (ORCPT ); Thu, 20 Aug 2020 09:23:00 -0400 Received: from mail.kernel.org ([198.145.29.99]:45002 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728405AbgHTJd0 (ORCPT ); Thu, 20 Aug 2020 05:33:26 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id CB9A822BEF; Thu, 20 Aug 2020 09:33:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597915993; bh=0pkLbZ3ecE1PW8MfK1EZfq9ZmaccVL2nFYhP+U3ugMU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Bo5aqiUCvvmFnpok/m7u/8NaniYKQlT3inDMT939nVGBQAHdXcYAiKbuvPQR7TARf oA7Giwk7NMruK3mNqB+lKwxNnhm+HFX4EBZMktl6UfC5FJwuSqyer8GLn5y5Yb5U/6 0hPDIzmh2WYJlddqwR9q12UaX3gpBf2MaCmiE2cY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dilip Kota , Ingo Molnar , Andy Shevchenko , Sasha Levin Subject: [PATCH 5.8 189/232] x86/tsr: Fix tsc frequency enumeration bug on Lightning Mountain SoC Date: Thu, 20 Aug 2020 11:20:40 +0200 Message-Id: <20200820091621.948589440@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200820091612.692383444@linuxfoundation.org> References: <20200820091612.692383444@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Dilip Kota [ Upstream commit 7d98585860d845e36ee612832a5ff021f201dbaf ] Frequency descriptor of Lightning Mountain SoC doesn't have all the frequency entries so resulting in the below failure causing a kernel hang: Error MSR_FSB_FREQ index 15 is unknown tsc: Fast TSC calibration failed So, add all the frequency entries in the Lightning Mountain SoC frequency descriptor. Fixes: 0cc5359d8fd45 ("x86/cpu: Update init data for new Airmont CPU model") Fixes: 812c2d7506fd ("x86/tsc_msr: Use named struct initializers") Signed-off-by: Dilip Kota Signed-off-by: Ingo Molnar Reviewed-by: Andy Shevchenko Link: https://lore.kernel.org/r/211c643ae217604b46cbec43a2c0423946dc7d2d.1596440057.git.eswara.kota@linux.intel.com Signed-off-by: Sasha Levin --- arch/x86/kernel/tsc_msr.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/tsc_msr.c b/arch/x86/kernel/tsc_msr.c index 4fec6f3a1858b..a654a9b4b77c0 100644 --- a/arch/x86/kernel/tsc_msr.c +++ b/arch/x86/kernel/tsc_msr.c @@ -133,10 +133,15 @@ static const struct freq_desc freq_desc_ann = { .mask = 0x0f, }; -/* 24 MHz crystal? : 24 * 13 / 4 = 78 MHz */ +/* + * 24 MHz crystal? : 24 * 13 / 4 = 78 MHz + * Frequency step for Lightning Mountain SoC is fixed to 78 MHz, + * so all the frequency entries are 78000. + */ static const struct freq_desc freq_desc_lgm = { .use_msr_plat = true, - .freqs = { 78000, 78000, 78000, 78000, 78000, 78000, 78000, 78000 }, + .freqs = { 78000, 78000, 78000, 78000, 78000, 78000, 78000, 78000, + 78000, 78000, 78000, 78000, 78000, 78000, 78000, 78000 }, .mask = 0x0f, };