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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CEF4EC433F5 for ; Wed, 22 Dec 2021 14:52:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237161AbhLVOwE (ORCPT ); Wed, 22 Dec 2021 09:52:04 -0500 Received: from mga02.intel.com ([134.134.136.20]:51223 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232073AbhLVOwE (ORCPT ); Wed, 22 Dec 2021 09:52:04 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1640184724; x=1671720724; h=subject:to:cc:references:from:message-id:date: mime-version:in-reply-to:content-transfer-encoding; bh=4xtn6EPbwVHkHyVB1KSElYHsfFLKGvF4/J0qCuOQMsk=; b=VUxYS4ku8mQ94rXyF+ZuUegIUm6+KI11IzClom3FK8j/jocam69PpRgk jtXpyM3e0k5/rOxROXL4qLlwr40FGBSqBVP71g9gmQqt5r8RiklcpbPfr Jq6cav73MyWoowvwV5DqWRF8ZxmxL7U8nTExUn4wwvrYyN6Fqd/UA+9bJ nTjRF//BmrOmXHs2CtcvpOyWbqZvzB3TM9KYzZ2rbXrz5vzXyKbGJ7Dyg YwCBveHUE2SRfREwozZ8wej3h2LIP+HvNc4ADivWxduczGy2Zv/m4kjSt LATsih0N2HKpjbC1RCTmZ/FeYdw9Sqyyl0jC9SS5UeUzrRcaEdGYcuPwQ Q==; X-IronPort-AV: E=McAfee;i="6200,9189,10205"; a="227927819" X-IronPort-AV: E=Sophos;i="5.88,226,1635231600"; d="scan'208";a="227927819" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Dec 2021 06:52:03 -0800 X-IronPort-AV: E=Sophos;i="5.88,226,1635231600"; d="scan'208";a="484776260" Received: from drakemat-mobl.amr.corp.intel.com (HELO [10.212.179.136]) ([10.212.179.136]) by orsmga002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Dec 2021 06:52:03 -0800 Subject: Re: State Component 18 and Palette 1 (Re: [PATCH 16/19] kvm: x86: Introduce KVM_{G|S}ET_XSAVE2 ioctl) To: "Nakajima, Jun" , Paolo Bonzini Cc: "Zhong, Yang" , "x86@kernel.org" , "kvm@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "tglx@linutronix.de" , "mingo@redhat.com" , "bp@alien8.de" , "dave.hansen@linux.intel.com" , "Christopherson,, Sean" , "Tian, Kevin" , "jing2.liu@linux.intel.com" , "Liu, Jing2" References: <20211208000359.2853257-1-yang.zhong@intel.com> <20211208000359.2853257-17-yang.zhong@intel.com> <26ea7039-3186-c23f-daba-d039bb8d6f48@redhat.com> <24CFD156-5093-4833-8516-526A90FF350E@intel.com> From: Dave Hansen Autocrypt: addr=dave.hansen@intel.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <24CFD156-5093-4833-8516-526A90FF350E@intel.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 12/20/21 9:54 AM, Nakajima, Jun wrote: >> So, I hope that save state 18 will be frozen to 8k. In that case, >> and if palette 1 is frozen to the same values as today, >> implementing migration will not be a problem; it will be >> essentially the same as SSE->AVX (horizontal extension of existing >> registers) and/or AVX->AVX512 (both horizontal and vertical >> extension). > > I would like to confirm that the state component 18 will remain 8KB > and palette 1 will remain the same. Is that an architectural statement that will soon be making its way into the SDM?