From patchwork Thu Jul 4 11:25:07 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: EwanHai X-Patchwork-Id: 13723643 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 03B13C30653 for ; Thu, 4 Jul 2024 11:25:48 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sPKah-0007Yt-Pb; Thu, 04 Jul 2024 07:25:31 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sPKad-0007VC-Hk for qemu-devel@nongnu.org; Thu, 04 Jul 2024 07:25:27 -0400 Received: from mx2.zhaoxin.com ([203.110.167.99]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sPKab-0002tR-0h for qemu-devel@nongnu.org; Thu, 04 Jul 2024 07:25:27 -0400 X-ASG-Debug-ID: 1720092313-1eb14e2e5ecaa20001-jgbH7p Received: from ZXSHMBX3.zhaoxin.com (ZXSHMBX3.zhaoxin.com [10.28.252.165]) by mx2.zhaoxin.com with ESMTP id CJEZi5r4SAuZ5IKy (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NO); Thu, 04 Jul 2024 19:25:13 +0800 (CST) X-Barracuda-Envelope-From: EwanHai-oc@zhaoxin.com X-Barracuda-RBL-Trusted-Forwarder: 10.28.252.165 Received: from zxbjmbx1.zhaoxin.com (10.29.252.163) by ZXSHMBX3.zhaoxin.com (10.28.252.165) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Thu, 4 Jul 2024 19:25:12 +0800 Received: from ewan-server.zhaoxin.com (10.28.66.62) by zxbjmbx1.zhaoxin.com (10.29.252.163) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Thu, 4 Jul 2024 19:25:12 +0800 X-Barracuda-RBL-Trusted-Forwarder: 10.28.252.165 From: EwanHai X-Barracuda-RBL-Trusted-Forwarder: 10.29.252.163 To: , , CC: , , , , , , Subject: [PATCH v2 0/4] Add support for Zhaoxin Yongfeng CPU model and other improvements Date: Thu, 4 Jul 2024 07:25:07 -0400 X-ASG-Orig-Subj: [PATCH v2 0/4] Add support for Zhaoxin Yongfeng CPU model and other improvements Message-ID: <20240704112511.184257-1-ewanhai-oc@zhaoxin.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Originating-IP: [10.28.66.62] X-ClientProxiedBy: zxbjmbx1.zhaoxin.com (10.29.252.163) To zxbjmbx1.zhaoxin.com (10.29.252.163) X-Barracuda-Connect: ZXSHMBX3.zhaoxin.com[10.28.252.165] X-Barracuda-Start-Time: 1720092313 X-Barracuda-Encrypted: ECDHE-RSA-AES128-GCM-SHA256 X-Barracuda-URL: https://10.28.252.36:4443/cgi-mod/mark.cgi X-Virus-Scanned: by bsmtpd at zhaoxin.com X-Barracuda-Scan-Msg-Size: 1528 X-Barracuda-BRTS-Status: 1 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using global scores of TAG_LEVEL=1000.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=9.0 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.3.127154 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- Received-SPF: pass client-ip=203.110.167.99; envelope-from=EwanHai-oc@zhaoxin.com; helo=mx2.zhaoxin.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org ### Summary of changes EwanHai (4): target/i386: Add support for Zhaoxin CPU vendor identification target/i386: Add CPUID leaf 0xC000_0001 EDX definitions target/i386: Introduce Zhaoxin Yongfeng CPU model target/i386: Update CMPLegacy handling for Zhaoxin CPUs target/i386/cpu.c | 128 ++++++++++++++++++++++++++++++++++++++++++++-- target/i386/cpu.h | 41 ++++++++++++++- 2 files changed, 165 insertions(+), 4 deletions(-) ### Changes since v1 1. Removed VIA-related information from the patch description to avoid misunderstanding. 2. Replaced CPUID_VENDOR_VIA with CPUID_VENDOR_ZHAOXIN1 because the "Centaurhauls" vendor ID now belongs to Zhaoxin.The previous CPUID_VENDOR_VIA macro was only defined but never used in QEMU, making this change straightforward. v1 link: https://lore.kernel.org/qemu-devel/20240625091905.1325205-1-ewanhai- oc@zhaoxin.com/ ### Known Issues 1. Issue with VMX Preemption Timer Rate on Yongfeng CPU: - Description: On Yongfeng CPUs, the VMX preemption timer rate is 128, meaning that bits 4:0 of MSR_IA32_VMX_MISC_CTLS should be set to 7. However, due to Intel's rate being 5, the Linux kernel has hardcoded this value as 5: `#define VMX_MISC_EMULATED_PREEMPTION_TIMER_RATE 5`. - Impact: This discrepancy can cause incorrect behavior in the VMX preemption timer on Yongfeng CPUs. - Workaround: A patch to correct this issue in the Linux kernel is currently being prepared and will be submitted soon.