From mboxrd@z Thu Jan 1 00:00:00 1970 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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS 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 7AED0ECDFB8 for ; Tue, 24 Jul 2018 18:14:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 38C7C20874 for ; Tue, 24 Jul 2018 18:14:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 38C7C20874 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388566AbeGXTWT (ORCPT ); Tue, 24 Jul 2018 15:22:19 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:50864 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S2388366AbeGXTWT (ORCPT ); Tue, 24 Jul 2018 15:22:19 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 818197D84D; Tue, 24 Jul 2018 18:14:36 +0000 (UTC) Received: from [10.36.117.134] (ovpn-117-134.ams2.redhat.com [10.36.117.134]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 61CAB178BC; Tue, 24 Jul 2018 18:14:30 +0000 (UTC) Subject: Re: [PATCH v2 01/17] x86/cpu: create Dhyana init file and register new cpu_dev to system To: Pu Wen , tglx@linutronix.de, bp@alien8.de, thomas.lendacky@amd.com, mingo@redhat.com, hpa@zytor.com, peterz@infradead.org, tony.luck@intel.com, rkrcmar@redhat.com, boris.ostrovsky@oracle.com, jgross@suse.com, rjw@rjwysocki.net, lenb@kernel.org, viresh.kumar@linaro.org, mchehab@kernel.org, trenn@suse.com, shuah@kernel.org, JBeulich@suse.com, x86@kernel.org Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org References: <1532352037-7151-1-git-send-email-puwen@hygon.cn> <1532352037-7151-2-git-send-email-puwen@hygon.cn> From: Paolo Bonzini Openpgp: preference=signencrypt Autocrypt: addr=pbonzini@redhat.com; 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Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.8.0 MIME-Version: 1.0 In-Reply-To: <1532352037-7151-2-git-send-email-puwen@hygon.cn> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.11.54.5 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.2]); Tue, 24 Jul 2018 18:14:36 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.2]); Tue, 24 Jul 2018 18:14:36 +0000 (UTC) for IP:'10.11.54.5' DOMAIN:'int-mx05.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'pbonzini@redhat.com' RCPT:'' Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 23/07/2018 15:20, Pu Wen wrote: > Add x86 architecture support for new processor Hygon Dhyana Family 18h. > Rework to create a separated file(arch/x86/kernel/cpu/hygon.c) from the > AMD init one(arch/x86/kernel/cpu/amd.c) to initialize Dhyana CPU. In > this way we can remove old AMD architecture support codes from Hygon > code path and generate a clear initialization flow for Hygon processors, > it also reduce long-term maintenance effort. > Also add hygon.c Maintainer information in accordance. > > To identify Hygon processors, add a new vendor type X86_VENDOR_HYGON(9) > for system recognition. > > To enable Hygon processor config, add a separated Kconfig entry(CPU_SUP_ > HYGON) for Dhyana CPU in kernel config setup. If Hygon processors are currently the same as AMD, I don't see the point in creating a new file just for them. Likewise for example in patch 6 + case X86_VENDOR_HYGON: + ideal_nops = p6_nops; + return; + case X86_VENDOR_AMD: if (boot_cpu_data.x86 > 0xf) { ideal_nops = p6_nops; Should only need to add "case X86_VENDOR_HYGON:". Or you could even reuse X86_VENDOR_AMD. Paolo