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 X-Spam-Level: X-Spam-Status: No, score=-17.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 05327C433ED for ; Thu, 22 Apr 2021 14:57:59 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 937906141C for ; Thu, 22 Apr 2021 14:57:58 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 937906141C Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=suse.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.115580.220563 (Exim 4.92) (envelope-from ) id 1lZam4-0006m8-7m; Thu, 22 Apr 2021 14:57:48 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 115580.220563; Thu, 22 Apr 2021 14:57:48 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lZam4-0006m0-4S; Thu, 22 Apr 2021 14:57:48 +0000 Received: by outflank-mailman (input) for mailman id 115580; Thu, 22 Apr 2021 14:57:46 +0000 Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lZam2-0006lp-BK for xen-devel@lists.xenproject.org; Thu, 22 Apr 2021 14:57:46 +0000 Received: from mx2.suse.de (unknown [195.135.220.15]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id 751cc7ac-e603-4a1f-a002-1c66535d470c; Thu, 22 Apr 2021 14:57:45 +0000 (UTC) Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 4F834B16A; Thu, 22 Apr 2021 14:57:44 +0000 (UTC) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 751cc7ac-e603-4a1f-a002-1c66535d470c X-Virus-Scanned: by amavisd-new at test-mx.suse.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1619103464; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=0Kar8c0Mm+YFIHWmPbC+8g9omJWrv1zJZFI3hL51bIQ=; b=eBoUDSl4ml+KE6JjGdKtVsKE+2Wx9sR4QP1+q10TA8kbXIfKcC+zm84gssNoZHJdr0UWB7 sitgryWGEKbPDgd8TyrxPV2p9gvlA5b/Q48G/JA25MSVpy6bdgCyvyj0tdfcnLXqLXTa+Q Tdxo0rzbhLGtMx+1soYolNUJIghEpzY= Subject: [PATCH v3 22/22] x86: permit guests to use AMX and XFD From: Jan Beulich To: "xen-devel@lists.xenproject.org" Cc: Andrew Cooper , George Dunlap , Wei Liu , =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= References: <322de6db-e01f-0b57-5777-5d94a13c441a@suse.com> Message-ID: Date: Thu, 22 Apr 2021 16:57:44 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.10.0 MIME-Version: 1.0 In-Reply-To: <322de6db-e01f-0b57-5777-5d94a13c441a@suse.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit These features are marked experimental (for only parts of the code actually having got tested yet, while other parts require respective hardware) and opt-in for guests. Signed-off-by: Jan Beulich --- v3: New. --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -6,6 +6,9 @@ The format is based on [Keep a Changelog ## [unstable UNRELEASED](https://xenbits.xen.org/gitweb/?p=xen.git;a=shortlog;h=staging) - TBD +### Added / support upgraded + - x86 AMX and XFD (Experimental) + ## [4.15.0 UNRELEASED](https://xenbits.xen.org/gitweb/?p=xen.git;a=shortlog;h=RELEASE-4.15.0) - TBD ### Added / support upgraded --- a/SUPPORT.md +++ b/SUPPORT.md @@ -61,6 +61,10 @@ For the Cortex A57 r0p0 - r1p1, see Erra Status: Tech Preview +### x86 AMX and XFD + + Status: Experimental + ### IOMMU Status, AMD IOMMU: Supported --- a/xen/include/public/arch-x86/cpufeatureset.h +++ b/xen/include/public/arch-x86/cpufeatureset.h @@ -191,7 +191,7 @@ XEN_CPUFEATURE(XSAVEOPT, 4*32+ 0) / XEN_CPUFEATURE(XSAVEC, 4*32+ 1) /*A XSAVEC/XRSTORC instructions */ XEN_CPUFEATURE(XGETBV1, 4*32+ 2) /*A XGETBV with %ecx=1 */ XEN_CPUFEATURE(XSAVES, 4*32+ 3) /*S XSAVES/XRSTORS instructions */ -XEN_CPUFEATURE(XFD, 4*32+ 4) /* XFD / XFD_ERR MSRs */ +XEN_CPUFEATURE(XFD, 4*32+ 4) /*a XFD / XFD_ERR MSRs */ /* Intel-defined CPU features, CPUID level 0x00000007:0.ebx, word 5 */ XEN_CPUFEATURE(FSGSBASE, 5*32+ 0) /*A {RD,WR}{FS,GS}BASE instructions */ @@ -269,9 +269,9 @@ XEN_CPUFEATURE(MD_CLEAR, 9*32+10) / XEN_CPUFEATURE(TSX_FORCE_ABORT, 9*32+13) /* MSR_TSX_FORCE_ABORT.RTM_ABORT */ XEN_CPUFEATURE(SERIALIZE, 9*32+14) /*a SERIALIZE insn */ XEN_CPUFEATURE(CET_IBT, 9*32+20) /* CET - Indirect Branch Tracking */ -XEN_CPUFEATURE(AMX_BF16, 9*32+22) /* AMX BFloat16 instructions */ -XEN_CPUFEATURE(AMX_TILE, 9*32+24) /* AMX tile architecture */ -XEN_CPUFEATURE(AMX_INT8, 9*32+25) /* AMX 8-bit integer instructions */ +XEN_CPUFEATURE(AMX_BF16, 9*32+22) /*a AMX BFloat16 instructions */ +XEN_CPUFEATURE(AMX_TILE, 9*32+24) /*a AMX tile architecture */ +XEN_CPUFEATURE(AMX_INT8, 9*32+25) /*a AMX 8-bit integer instructions */ XEN_CPUFEATURE(IBRSB, 9*32+26) /*A IBRS and IBPB support (used by Intel) */ XEN_CPUFEATURE(STIBP, 9*32+27) /*A STIBP */ XEN_CPUFEATURE(L1D_FLUSH, 9*32+28) /*S MSR_FLUSH_CMD and L1D flush. */