From nobody Sat Feb 7 07:31:16 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=pass(p=quarantine dis=none) header.from=suse.com ARC-Seal: i=1; a=rsa-sha256; t=1619103042; cv=none; d=zohomail.com; s=zohoarc; b=ByEjVjd4LwIDcsj+wGmV2tVzdSz/jsz8HoscwrtIulAIC4qXiyYjBZdeduvKvvtrCcpiBGfl6nbph6o4eVFXxr8KiLzK7rNHtzDwNPla1+wk5Xb9VxWPR/88g+8KBSUQawjGsbcO15M0JdsMFWGyiX+yb8nmgoQ/9weNzyd6nSg= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1619103042; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=+QdQWxNcKE7APKYxJnP/WcIc9s52TlEnJpEVbzCgqbg=; b=jCKJ/ond0dFp6CRI5zHorLuOwJeYXVpHOF7CqXwskGu+WDw1ZIr33L+hsDRKrYnJTpcdC0IkotlXpT7Si3prNERO3YGhHm3CwoVhyfBLw+HdZdC89SnlDpOHvr4i5jOwS+oDZvvD+mqU07qLPXaPF4NRbTVIxSQWD3Fvy7oZg00= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=pass header.from= (p=quarantine dis=none) header.from= Return-Path: Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) by mx.zohomail.com with SMTPS id 1619103042356636.5303890838265; Thu, 22 Apr 2021 07:50:42 -0700 (PDT) Received: from list by lists.xenproject.org with outflank-mailman.115504.220392 (Exim 4.92) (envelope-from ) id 1lZaek-0004xw-OR; Thu, 22 Apr 2021 14:50:14 +0000 Received: by outflank-mailman (output) from mailman id 115504.220392; Thu, 22 Apr 2021 14:50:14 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lZaek-0004xp-KF; Thu, 22 Apr 2021 14:50:14 +0000 Received: by outflank-mailman (input) for mailman id 115504; Thu, 22 Apr 2021 14:50:13 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lZaej-0004xj-E9 for xen-devel@lists.xenproject.org; Thu, 22 Apr 2021 14:50:13 +0000 Received: from mx2.suse.de (unknown [195.135.220.15]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id c9b0d180-a439-4877-9c45-42c6449251d1; Thu, 22 Apr 2021 14:50:12 +0000 (UTC) Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id DBFB9B177; Thu, 22 Apr 2021 14:50:11 +0000 (UTC) X-Outflank-Mailman: Message body and most headers restored to incoming version 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: c9b0d180-a439-4877-9c45-42c6449251d1 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=1619103012; 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=+QdQWxNcKE7APKYxJnP/WcIc9s52TlEnJpEVbzCgqbg=; b=e3PtmwVNBCYQunHtm0GS0/Knk0Q82wV/Vg2een4wPBNxR2Xuc8jPezfKm2//rVxqgIm88k EEVMG6y5gJKG6tkSNyGQjb6/b6KqFe3XdYwtL0U0S6Z9j+QflvW/uBqSpxE+fwWfXC1mjE JPCbTjuL8H4Z1M5Mb+slvDTIQZP+7l4= Subject: [PATCH v3 10/22] x86/CPUID: adjust extended leaves out of range clearing 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 16:50:12 +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: quoted-printable X-ZohoMail-DKIM: pass (identity @suse.com) A maximum extended leaf input value with the high half different from 0x8000 should not be considered valid - all leaves should be cleared in this case. Signed-off-by: Jan Beulich Reviewed-by: Roger Pau Monn=C3=A9 --- TBD: Andrew suggested to drop this patch, but that sub-thread still has a loose end. Hence, until I'm convinced otherwise, I've retained this patch here. I don't think it conflicts with any of the subsequent ones. --- v2: Integrate into series. --- a/tools/tests/cpu-policy/test-cpu-policy.c +++ b/tools/tests/cpu-policy/test-cpu-policy.c @@ -519,11 +519,22 @@ static void test_cpuid_out_of_range_clea }, }, { + .name =3D "no extd", + .nr_markers =3D 0, + .p =3D { + /* Clears all markers. */ + .extd.max_leaf =3D 0, + + .extd.vendor_ebx =3D 0xc2, + .extd.raw_fms =3D 0xc2, + }, + }, + { .name =3D "extd", .nr_markers =3D 1, .p =3D { /* Retains marker in leaf 0. Clears others. */ - .extd.max_leaf =3D 0, + .extd.max_leaf =3D 0x80000000, .extd.vendor_ebx =3D 0xc2, =20 .extd.raw_fms =3D 0xc2, --- a/xen/lib/x86/cpuid.c +++ b/xen/lib/x86/cpuid.c @@ -232,7 +232,9 @@ void x86_cpuid_policy_clear_out_of_range ARRAY_SIZE(p->xstate.raw) - 1); } =20 - zero_leaves(p->extd.raw, (p->extd.max_leaf & 0xffff) + 1, + zero_leaves(p->extd.raw, + ((p->extd.max_leaf >> 16) =3D=3D 0x8000 + ? (p->extd.max_leaf & 0xffff) + 1 : 0), ARRAY_SIZE(p->extd.raw) - 1); } =20