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=-5.1 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_2 autolearn=no 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 5B582C11F64 for ; Thu, 1 Jul 2021 15:00:36 +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 0557661221 for ; Thu, 1 Jul 2021 15:00:35 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0557661221 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=aepfle.de 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.148913.275225 (Exim 4.92) (envelope-from ) id 1lyyAu-0008MI-5b; Thu, 01 Jul 2021 15:00:20 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 148913.275225; Thu, 01 Jul 2021 15:00:20 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lyyAu-0008MB-2Y; Thu, 01 Jul 2021 15:00:20 +0000 Received: by outflank-mailman (input) for mailman id 148913; Thu, 01 Jul 2021 15:00:19 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lyyAt-0008M5-1l for xen-devel@lists.xenproject.org; Thu, 01 Jul 2021 15:00:19 +0000 Received: from mo4-p01-ob.smtp.rzone.de (unknown [81.169.146.164]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 68fc91ca-6281-4814-93ea-fcf68e3bd5db; Thu, 01 Jul 2021 15:00:18 +0000 (UTC) Received: from sender by smtp.strato.de (RZmta 47.28.1 AUTH) with ESMTPSA id 30791cx61F0G7NZ (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate); Thu, 1 Jul 2021 17:00:16 +0200 (CEST) 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: 68fc91ca-6281-4814-93ea-fcf68e3bd5db DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1625151616; s=strato-dkim-0002; d=aepfle.de; h=References:In-Reply-To:Message-ID:Subject:Cc:To:From:Date:Cc:Date: From:Subject:Sender; bh=1FRUTA3lx1xmpOp1mKwuBsgpUX+KYHxPk64HZkc7MTI=; b=g/z5yD0aJ3oSy0UuR/Wra5UCgZdzo9XYOnqfa10HvSojgcWl5dxTVtKSK3CUFPloeJ upFEiKVN7QwYHNGzv9bi7BofWM6I1o9blVSLWEB1XbMTW5wkiHxRa1JxwQx7Blymj7qx SO1zVjPQ0bBoO/BO6SAL+zTabDIH9fZdp6FJpzh9DDUARMzb0vwHkHUvrV4w5qi1oshC f9B5+/nCk3NRDpzm5rE8gg7toFMnrMZ72pVpqZNljhfT51yqW20SA+pJuDZnN13GXyMd HMTwmSoiTV3FpHRo+56eWLfZ60oPm5OqSpjVnQFXzP41ckIC0JekOYbOhPOdyMe/v1L7 UgWw== Authentication-Results: strato.com; dkim=none X-RZG-AUTH: ":P2EQZWCpfu+qG7CngxMFH1J+3q8wa/QLpd5ylWvMDX3y/OuD5rXVisQsBBSIa03sY9BUY2ao0oygRsMfcqA6zjDLeeWXNg==" X-RZG-CLASS-ID: mo00 Date: Thu, 1 Jul 2021 17:00:09 +0200 From: Olaf Hering To: Andrew Cooper Cc: Subject: Re: XEN_SYSCTL_cpu_policy_hvm_default truncates leaf count Message-ID: <20210701170009.5a8be33f.olaf@aepfle.de> In-Reply-To: <20e828c9-e7dc-4401-9307-a6d72eb618d8@citrix.com> References: <20210701125623.593fe3ae.olaf@aepfle.de> <20e828c9-e7dc-4401-9307-a6d72eb618d8@citrix.com> X-Mailer: Claws Mail 2021.05.27 (GTK+ 2.24.32; x86_64-suse-linux-gnu) MIME-Version: 1.0 Content-Type: multipart/signed; boundary="Sig_/_MbKKWyEwa/888gyYOByhSd"; protocol="application/pgp-signature"; micalg=pgp-sha256 --Sig_/_MbKKWyEwa/888gyYOByhSd Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Am Thu, 1 Jul 2021 12:19:24 +0100 schrieb Andrew Cooper : > Where is the 51 leaves coming in? I suspect the bug is this line, and the magic "0x1c" value: p->extd.max_leaf =3D min(p->extd.max_leaf, 0x1cu); In my testing basic remains at 13, while extd is truncated from 0x80000008 = to 28. I think it should be truncated to CPUID_GUEST_NR_EXTD_INTEL? Olaf --Sig_/_MbKKWyEwa/888gyYOByhSd Content-Type: application/pgp-signature Content-Description: Digitale Signatur von OpenPGP -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEE97o7Um30LT3B+5b/86SN7mm1DoAFAmDd2HkACgkQ86SN7mm1 DoAt5RAAi7YY8rPut4dXconVpm/h1wjL1WGHXNCYK5cNxb7vUjo5nzcWyvUWYGyW f50OsYYJTtLUt7pjuvymmPNPMomOAnYu6E3lYJ5zNu0yGW4FmB8ekh5IohMeFEdi RDT725qmdE4vofiR+Apnk6OQ59t0a4u2g2FEPnomsk0Vmj0p9fz3wrbbTNBWPPr+ N61Irs6OtspnBZ/I+qwL5jSCBhE9JvxB+Ni52O0HwTU015zOJQAlqkDpl+bVMrkl ZZgEmbTs5kKZ/0JvqRm+TMNK0fCHm/f6Olt5lNu4wyDaZEmzjDBgOEGO1WlcASXf hCzv0WSL5opHRc8GwdHuOipiVR4s2L4w1TCo7+J16+g+96Ctkx10vTKKUjat+xxj PfZi/+MMeqcKcAmQOoMbcloXBYssW+dDNf9pc3DYxLpMtThC8cn9YX//nEVyLeeg yHQXxg1usZQLqrcx7Jyj3w6oMsrRPG1jE4vkUtfRBXJ4WGLG4+ObHQw8seyA6KIU J3oJY1fV0ZAR1kfbnw4w/CreiyKZ86TpBMNx5r2JZPNX9r0xusG3WCrwZneOcnHT nUoNx8D4+0gnowP8JLSWgAdvl5jrZ/Sd8opSE9muh+6pI0eIsjNFYTJJpUic3sLM iHkuawfChvXN54vWpEAhnQYACTxgEWPuMLdK2MQJP9aVyDKsjqE= =Zc2q -----END PGP SIGNATURE----- --Sig_/_MbKKWyEwa/888gyYOByhSd--