From nobody Tue Dec 24 13:13:18 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass header.i=@intel.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=intel.com ARC-Seal: i=1; a=rsa-sha256; t=1734607018; cv=none; d=zohomail.com; s=zohoarc; b=HUqb1WOLFf7Oy/fSt0euD4AkhywDfbD3/BPzQxq/yOgHSVS6mvpNksc3drgquy3fDG68QHrX7HA7SS2F6siq1GaTqkN4mmnYYTCg2aP7epb3fRHTJOgGCoveskFrkymd8SWXC871c1oTZmb+6U1sgWSSm8sxu8UShgMxiKAOmpA= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1734607018; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=pRmyf6PuJU7G1EngztAsMgaCBL0SYHM2x620Jf5AN5Q=; b=JGGUHZEZFGA4KjOOWrLJiaEcBqWGSPdp7CcC4vHajH75F5C3tWB1x1f7/YDl4kjhHFlEGtremJe8SscZE65mdUSs0xvcDzAXliMjWagJqM5lGLFE7deFJJh/GAbmzjJlQroedvrLUkWMQgLgUzwbTD2MhE3+OIvA2cwZ6Fwijnc= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=@intel.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1734607018288847.3716687288254; Thu, 19 Dec 2024 03:16:58 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1tOEVy-0004lC-6b; Thu, 19 Dec 2024 06:16:22 -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 1tOEVu-0004cD-4I for qemu-devel@nongnu.org; Thu, 19 Dec 2024 06:16:19 -0500 Received: from mgamail.intel.com ([198.175.65.19]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tOEVs-0005Kx-Di for qemu-devel@nongnu.org; Thu, 19 Dec 2024 06:16:17 -0500 Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by orvoesa111.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Dec 2024 03:16:16 -0800 Received: from lxy-clx-4s.sh.intel.com ([10.239.48.52]) by fmviesa006.fm.intel.com with ESMTP; 19 Dec 2024 03:16:13 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1734606977; x=1766142977; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=MHgdNVgv8JU4EXomJN5hU+EHD1vfrDJJzg4gGCEl33Y=; b=CB5/rBGKLwHDOn+b9CWfz4Y8Y/EeCiWOb+bHbN+XsEIx15n4r4QjJV/E VWoBTS76/G5AW7G+EPEK2+eT6YFAhcQ9PywyWbs+5ki3h1a6rQS7wiql6 K51DwDT7ciSX3VGUjep9YD3vVT9uK41TJFcVir7Y42PoIRSUwBeQ/lv9d 816l2XwUbCvGtQ7HmHjiorAa9yWPj9mJixqTFXkrXYwmOspEdzAyIq12b uOiDMqXRYDmVtu+L1xnQOAyhnH/8jPpS1mSTEEFrLXaVLY3MbW6kB8KJw qDUOrUtfGssBTPSygRMfVdsQ/3jx7WD5l+gryzkArrJc6dP+NF4lId2Fu A==; X-CSE-ConnectionGUID: WWiYbFKKTGGYWoJu9vYWUA== X-CSE-MsgGUID: 1MW9reJDRV265Krrk8NEdw== X-IronPort-AV: E=McAfee;i="6700,10204,11290"; a="34994988" X-IronPort-AV: E=Sophos;i="6.12,247,1728975600"; d="scan'208";a="34994988" X-CSE-ConnectionGUID: +MY+tXIkTxakM5AkCiefYg== X-CSE-MsgGUID: KvXn05KtSXe/drhSwlIZ9Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,247,1728975600"; d="scan'208";a="97956195" From: Xiaoyao Li To: Paolo Bonzini , Igor Mammedov , Marcel Apfelbaum , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Cc: qemu-devel@nongnu.org, Yanan Wang , Zhao Liu , "Michael S. Tsirkin" , Marcelo Tosatti , xiaoyao.li@intel.com Subject: [PATCH v2 09/10] i386/cpu: Set up CPUID_HT in x86_cpu_expand_features() instead of cpu_x86_cpuid() Date: Thu, 19 Dec 2024 06:01:24 -0500 Message-Id: <20241219110125.1266461-10-xiaoyao.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241219110125.1266461-1-xiaoyao.li@intel.com> References: <20241219110125.1266461-1-xiaoyao.li@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=198.175.65.19; envelope-from=xiaoyao.li@intel.com; helo=mgamail.intel.com X-Spam_score_int: -33 X-Spam_score: -3.4 X-Spam_bar: --- X-Spam_report: (-3.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.998, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @intel.com) X-ZM-MESSAGEID: 1734607019051116600 Content-Type: text/plain; charset="utf-8" Currently CPUID_HT is evaluated in cpu_x86_cpuid() each time. It's not a correct usage of how feature bit is maintained and evaluated. The expected practice is that features are tracked in env->features[] and cpu_x86_cpuid() should be the consumer of env->features[]. Track CPUID_HT in env->features[FEAT_1_EDX] instead and evaluate it in cpu's realizefn(). Signed-off-by: Xiaoyao Li --- There is one issue[1] of CPUID_HT being user settable that when "-cpu xxx,-ht" with "-smp 2", HT flag is still exposed to guest. However, the issue is not irrelevant to this patch. If anyone has interest to reslove it please go ahead. [1] https://lore.kernel.org/qemu-devel/Z1FUDGnenETEFV6Z@intel.com/ --- target/i386/cpu.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index fd59da5d445d..bee494bdd029 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -6537,7 +6537,6 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, = uint32_t count, *edx =3D env->features[FEAT_1_EDX]; if (threads_per_pkg > 1) { *ebx |=3D threads_per_pkg << 16; - *edx |=3D CPUID_HT; } if (!cpu->enable_pmu) { *ecx &=3D ~CPUID_EXT_PDCM; @@ -7528,6 +7527,10 @@ void x86_cpu_expand_features(X86CPU *cpu, Error **er= rp) } } =20 + if (x86_threads_per_pkg(&env->topo_info) > 1) { + env->features[FEAT_1_EDX] |=3D CPUID_HT; + } + for (i =3D 0; i < ARRAY_SIZE(feature_dependencies); i++) { FeatureDep *d =3D &feature_dependencies[i]; if (!(env->features[d->from.index] & d->from.mask)) { --=20 2.34.1