From patchwork Wed Nov 25 14:48:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Punit Agrawal X-Patchwork-Id: 332691 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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, 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 89150C6379D for ; Wed, 25 Nov 2020 14:49:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2BF1920872 for ; Wed, 25 Nov 2020 14:49:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="V6OKSBNQ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730062AbgKYOtS (ORCPT ); Wed, 25 Nov 2020 09:49:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42834 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730060AbgKYOtR (ORCPT ); Wed, 25 Nov 2020 09:49:17 -0500 Received: from mail-pg1-x544.google.com (mail-pg1-x544.google.com [IPv6:2607:f8b0:4864:20::544]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B2940C0613D4; Wed, 25 Nov 2020 06:49:17 -0800 (PST) Received: by mail-pg1-x544.google.com with SMTP id w4so2602754pgg.13; Wed, 25 Nov 2020 06:49:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=M1I3F4x93QBnka2nDGMC5JfGYk1bQ37Bl9iSSpmaDtM=; b=V6OKSBNQAvJAezd5Hag6RU+goMxEycQIFMoSvwEDmtYjQTm4niWguaDLAlkBibiR/V meOjPykv6FOs3DnqRC1QTqE7M2xEHc6eXCw6pLVlKrZwdXL85Qt4CmR7p9076J6wR7YG RQUnnkdBAQDle5moSc/Y3+GfSvgmc4hXU1jLZE2niBI9iXxTB8YVM0EVRnklvdgo46T9 LAb9pUsgjky9JeGXJhKCnteIZ+juI+LVRlkRrRDYrwaoXG+z57wCHwIFoKuVTpzZEJ5o A5nSDhHUoNw6tH+SThvpHDoCaC+HBsV30hgEifYoql/vjXxhTFQMq2v6dmeZWq3fAeyP bxJw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=M1I3F4x93QBnka2nDGMC5JfGYk1bQ37Bl9iSSpmaDtM=; b=G9gcUZrCmmBpWumGAxjwWxwfbtB3VhzK78pUcdaMqzkLvYzt6p67Z8Cd8ToWYSEo3H e6TWtoS3uIZqfEaOMA0/ezIQ3Sks2W3zIME6IMMQVwGuaKOoVxg8pIxKFAyuBxi236Z8 HoIxgTAAl5qkF30/M4hd0QePVfTnBG9gnaOqx3vBvgz6WazqV5RN0FxtX43WGAnoCtwm g2vkkfOOAGSUKjuMnQHYZ03Zah9TvLw55Szl0c3bXrzX10UzC6UJlkWSSZhuhfIBbgRZ tyRgIxlfW5D420COAgW12tTs5c1cyxR0QfmykgyrQxcHdBmgDAsdTU4q93LgEBYWS5ON vjCQ== X-Gm-Message-State: AOAM531aD9NDiP2D8HjPOc+u4MvwpFp9s98OrolfIgF2NxUM+zt2LO8N fn2Br0pr9GlC7Ef6C2DKmVg= X-Google-Smtp-Source: ABdhPJys2pndSbrJqWCmE3inBNlXC1mcUssPb95pqUUsVTS32Fiue1SiOq0yd36BjrpnyWawhAuDUg== X-Received: by 2002:a17:90a:e018:: with SMTP id u24mr4649278pjy.189.1606315757273; Wed, 25 Nov 2020 06:49:17 -0800 (PST) Received: from localhost ([2405:6580:31a1:500:1ac0:4dff:fe39:5426]) by smtp.gmail.com with ESMTPSA id p6sm3385984pjt.13.2020.11.25.06.49.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 25 Nov 2020 06:49:16 -0800 (PST) From: Punit Agrawal To: rjw@rjwysocki.net Cc: Punit Agrawal , wei.huang2@amd.com, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, bp@alien8.de, x86@kernel.org Subject: [RFC PATCH 2/4] cpufreq: acpi-cpufreq: Add processor to the ignore PSD override list Date: Wed, 25 Nov 2020 23:48:45 +0900 Message-Id: <20201125144847.3920-3-punitagrawal@gmail.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201125144847.3920-1-punitagrawal@gmail.com> References: <20201125144847.3920-1-punitagrawal@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Booting Linux on a Zen2 based processor (family: 0x17, model: 0x60, stepping: 0x1) shows the following message in the logs - acpi_cpufreq: overriding BIOS provided _PSD data Although commit 5368512abe08 ("acpi-cpufreq: Honor _PSD table setting on new AMD CPUs") indicates that the override is not required for Zen3 onwards, it seems that domain information can be trusted even on certain earlier systems. Update the check, to skip the override for Zen2 processors known to work without the override. Signed-off-by: Punit Agrawal Cc: Wei Huang --- drivers/cpufreq/acpi-cpufreq.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c index b1e7df96d428..29f1cd93541e 100644 --- a/drivers/cpufreq/acpi-cpufreq.c +++ b/drivers/cpufreq/acpi-cpufreq.c @@ -198,8 +198,13 @@ static int override_acpi_psd(unsigned int cpu_id) if (c->x86_vendor == X86_VENDOR_AMD) { if (!check_amd_hwpstate_cpu(cpu_id)) return false; - - return c->x86 < 0x19; + /* + * CPU's before Zen3 (except some Zen2) need the + * override. + */ + return (c->x86 < 0x19) && + !(c->x86 == 0x17 && c->x86_model == 0x60 && + c->x86_stepping == 0x1); } return false;