From patchwork Thu Jan 25 02:40:14 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiaoyao Li X-Patchwork-Id: 13529844 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 2A7E5C48260 for ; Thu, 25 Jan 2024 02:41:05 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rSpfN-0003UC-Eu; Wed, 24 Jan 2024 21:40:34 -0500 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 1rSpfG-0003Te-H8 for qemu-devel@nongnu.org; Wed, 24 Jan 2024 21:40:26 -0500 Received: from mgamail.intel.com ([192.55.52.115]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rSpfE-0007d2-Qh for qemu-devel@nongnu.org; Wed, 24 Jan 2024 21:40:26 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1706150424; x=1737686424; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=nblpklNzUZKD78eAt5m3cZr0n/f8GwIruXeYbHNh9Ok=; b=GNMj4WwjqCql2nsXhJFhjnK2sY3ph8jbPgUrD8fy8F+dHCt7yPTZUSnt 63goLi9xTnGuM0buD2nQblt0wq+DbE4GihSqAZkyyll6Bu0N9QOtHbvmy 2SIaWFhCjVI7bFTMI0zJYwqZBzzvqmY7/Uw0obVHUG9H7VuurIQfDEwhp PO/b3bdxACJgasXBtI/Pk3z/P5nxHzq6j8ssD5v8dMzCEJghrgOoI8vTI +kCVfAzwrUxJqT5Mf0ajxWlyr/zDi8zrn93pfWIFlr070lfXeTbbovpjs 98G+CByrUlKDzN3oI1VgSOEpTlW9AKeYNOUy+MqLBDGXtc08RkqKy05/Q A==; X-IronPort-AV: E=McAfee;i="6600,9927,10962"; a="401687453" X-IronPort-AV: E=Sophos;i="6.05,216,1701158400"; d="scan'208";a="401687453" Received: from orviesa003.jf.intel.com ([10.64.159.143]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jan 2024 18:40:22 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.05,216,1701158400"; d="scan'208";a="2120530" Received: from lxy-clx-4s.sh.intel.com ([10.239.48.52]) by orviesa003.jf.intel.com with ESMTP; 24 Jan 2024 18:40:21 -0800 From: Xiaoyao Li To: Paolo Bonzini , Marcelo Tosatti Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, xiaoyao.li@intel.com Subject: [PATCH v3 1/3] i386/cpuid: Decrease cpuid_i when skipping CPUID leaf 1F Date: Wed, 24 Jan 2024 21:40:14 -0500 Message-Id: <20240125024016.2521244-2-xiaoyao.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240125024016.2521244-1-xiaoyao.li@intel.com> References: <20240125024016.2521244-1-xiaoyao.li@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=192.55.52.115; envelope-from=xiaoyao.li@intel.com; helo=mgamail.intel.com X-Spam_score_int: -38 X-Spam_score: -3.9 X-Spam_bar: --- X-Spam_report: (-3.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.5, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, HK_RANDOM_ENVFROM=0.999, HK_RANDOM_FROM=1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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 Existing code misses a decrement of cpuid_i when skip leaf 0x1F. There's a blank CPUID entry(with leaf, subleaf as 0, and all fields stuffed 0s) left in the CPUID array. It conflicts with correct CPUID leaf 0. Signed-off-by: Xiaoyao Li Reviewed-by:Yang Weijiang --- target/i386/kvm/kvm.c | 1 + 1 file changed, 1 insertion(+) diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index 76a66246eb72..dff9dedbd761 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -1914,6 +1914,7 @@ int kvm_arch_init_vcpu(CPUState *cs) } case 0x1f: if (env->nr_dies < 2) { + cpuid_i--; break; } /* fallthrough */