From nobody Tue Nov 26 09:47:21 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=linux.intel.com ARC-Seal: i=1; a=rsa-sha256; t=1709029317; cv=none; d=zohomail.com; s=zohoarc; b=Kb5iBzLrSG5WbUi54p1K2su8bXwTqyJSy16fJVSPwPBHkTjKbyZ8PYFm0b5P/6l3Mp16fn40tHY5f4OTy6fFGrGvxPIJYW375tLDzZhn/2q3uTB1Msmhf9WnwPfSHWcAM9MGs9qA3sbTE9v1si+Beg1BBQbM8hB2mkG5ybOYGeA= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1709029317; 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=0SzFsAeqZqkLS043sXQArZ1uAhSP5Id1Twqlp9bq89w=; b=NXBdiP72qvi6nu0/p9VBdONPbM0UAc4nicwWKJznqZBVG70T785djtOPy1M9mW/fx/5aqJvTGP61wSQVshLVL3Bl/0J4incxt7d19XXplyRiNTgqJg5MKMBtWNjbOs3pu9h5V0+rgOCQtXMdfBpmroVtX/un8Se1eazZFZOZiJQ= 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 1709029317530549.986749180914; Tue, 27 Feb 2024 02:21:57 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1reuZv-0000kN-Vc; Tue, 27 Feb 2024 05:20:51 -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 1reuZu-0000e8-C2 for qemu-devel@nongnu.org; Tue, 27 Feb 2024 05:20:50 -0500 Received: from mgamail.intel.com ([192.198.163.13]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1reuZs-0003lx-Pe for qemu-devel@nongnu.org; Tue, 27 Feb 2024 05:20:50 -0500 Received: from fmviesa010.fm.intel.com ([10.60.135.150]) by fmvoesa107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Feb 2024 02:20:37 -0800 Received: from liuzhao-optiplex-7080.sh.intel.com ([10.239.160.36]) by fmviesa010.fm.intel.com with ESMTP; 27 Feb 2024 02:20:32 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1709029248; x=1740565248; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=51yZIIBumqpl0Pci1JIC2Mbj/bgzNe6l2iPevAtFhp0=; b=OH0YAGM90BJ++AXtv5LRt/9QhF2veTO8H6JTF+qTfHLYfzGKuIoF/8jx RD2y1/iP0Q/fiiY59A9v1GxGvixF7LV8KeAmmCTxakmHRub5TLokpqh4B N3EftqSh8spSECzhg2MotQ8UuvT0TMWfWS8Ss7yjkllJBY9TrEhK6ueOz sWirOq666kg2BaWuHxCnrJ3pQncGBLcf/DyqvhhpT4OWjc3Adh0hDFEiE zTHSMTnq6Nk132utp6dewg2Jft61s9QM4k7bq/cQjbqIClZQQ6zjLz5Sa qnQBArsTFkx0dXX+52BrKP0TVG98t4B/eA4xOs9sH3gRjP/ELG4a0eTHJ Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10996"; a="6310502" X-IronPort-AV: E=Sophos;i="6.06,187,1705392000"; d="scan'208";a="6310502" X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.06,187,1705392000"; d="scan'208";a="6955300" From: Zhao Liu To: Eduardo Habkost , Marcel Apfelbaum , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Yanan Wang , "Michael S . Tsirkin" , Richard Henderson , Paolo Bonzini , Eric Blake , Markus Armbruster , Marcelo Tosatti , =?UTF-8?q?Daniel=20P=20=2E=20Berrang=C3=A9?= , Xiaoyao Li Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, Zhenyu Wang , Zhuocheng Ding , Babu Moger , Yongwei Ma , Zhao Liu Subject: [PATCH v9 21/21] i386/cpu: Use CPUCacheInfo.share_level to encode CPUID[0x8000001D].EAX[bits 25:14] Date: Tue, 27 Feb 2024 18:32:31 +0800 Message-Id: <20240227103231.1556302-22-zhao1.liu@linux.intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240227103231.1556302-1-zhao1.liu@linux.intel.com> References: <20240227103231.1556302-1-zhao1.liu@linux.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: none client-ip=192.198.163.13; envelope-from=zhao1.liu@linux.intel.com; helo=mgamail.intel.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.014, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_NONE=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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @intel.com) X-ZM-MESSAGEID: 1709029319108100003 Content-Type: text/plain; charset="utf-8" From: Zhao Liu CPUID[0x8000001D].EAX[bits 25:14] NumSharingCache: number of logical processors sharing cache. The number of logical processors sharing this cache is NumSharingCache + 1. After cache models have topology information, we can use CPUCacheInfo.share_level to decide which topology level to be encoded into CPUID[0x8000001D].EAX[bits 25:14]. Cc: Babu Moger Tested-by: Yongwei Ma Signed-off-by: Zhao Liu Reviewed-by: Babu Moger --- Changes since v7: * Renamed max_processor_ids_for_cache() to max_thread_ids_for_cache(). * Dropped Michael/Babu's ACKed/Tested tags since the code change. * Re-added Yongwei's Tested tag For his re-testing. Changes since v3: * Explained what "CPUID[0x8000001D].EAX[bits 25:14]" means in the commit message. (Babu) Changes since v1: * Used cache->share_level as the parameter in max_processor_ids_for_cache(). --- target/i386/cpu.c | 10 +--------- 1 file changed, 1 insertion(+), 9 deletions(-) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 07cd729c3524..bc21c2d537b3 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -481,20 +481,12 @@ static void encode_cache_cpuid8000001d(CPUCacheInfo *= cache, uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx) { - uint32_t num_sharing_cache; assert(cache->size =3D=3D cache->line_size * cache->associativity * cache->partitions * cache->sets); =20 *eax =3D CACHE_TYPE(cache->type) | CACHE_LEVEL(cache->level) | (cache->self_init ? CACHE_SELF_INIT_LEVEL : 0); - - /* L3 is shared among multiple cores */ - if (cache->level =3D=3D 3) { - num_sharing_cache =3D 1 << apicid_die_offset(topo_info); - } else { - num_sharing_cache =3D 1 << apicid_core_offset(topo_info); - } - *eax |=3D (num_sharing_cache - 1) << 14; + *eax |=3D max_thread_ids_for_cache(topo_info, cache->share_level) << 1= 4; =20 assert(cache->line_size > 0); assert(cache->partitions > 0); --=20 2.34.1