Received: by 2002:a25:1506:0:0:0:0:0 with SMTP id 6csp440316ybv; Wed, 19 Feb 2020 02:42:47 -0800 (PST) X-Google-Smtp-Source: APXvYqwg0Lzkh2oolihvrO3s8Rn58FMgFeY0o/cWVrOnsqiHg5O5jd8PAqfiixGkhzhcwDwf65fI X-Received: by 2002:aca:4ace:: with SMTP id x197mr4334825oia.23.1582108967325; Wed, 19 Feb 2020 02:42:47 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1582108967; cv=none; d=google.com; s=arc-20160816; b=c4YhDwOiora/fRrQZ9Xaw5k6ro8gQqDkXIaNSPKm1PEEmfXZzAOPWouHuV3vnGrQP+ 99QNBDco1j8ZbWTWtIshvIOcxr0GohWY6RS29NL1BjQBayTjS3YW2HLW4I6iZbrhj/+B QtxOJ0+MiUJ93exWtWth7RXwfcyWgQh7jz1rR4gL82sJ69iSlyJqodS62n1WkJLy9KZw dpqbHsSRQH+5mNk4cq7hx9JyQB6ea3jXe5mQMDvVY8YmrrNSujQQnFtSRqNuBv1BVcdQ Xgp3BrKL2y4VSDdwzTW6HsQRpcCIwAn6yqShDcmzevqWFz5kqPxBp8ax5oqL4R18+Y4o HKtA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-transfer-encoding:content-disposition:mime-version :references:message-id:subject:cc:to:from:date; bh=qmzbNA64Z9tGzpxAhvgWLs9i69wpPJRC0jS656vPrJk=; b=EI+uRu0oKgguz34NyIJDOx5C4qbNK1IwUuuMFiHVNz5TjJUMSpMcV7SUYZAs4tUFMZ /itM57/93KLu6LJYdcQm0m2+7f8/Rf8rmrQb1IjSTseyCbT4E1X7q9TRt0phvLoqOJ7P Z1G5t+PBYdgWw9y4wpeEIGvyMuQbC3ixGit7m4tbA3ab/52tjyjixwthl42qr+UQU4fw PcjyctaV7CE7V0bv07h4iAbIRFICUyHbC+B6O8PdZgveCphUE2j9HZO703QxBmtmLHpS 6rs26NLClB8xZstAnGq/XfM6qvEbus/l5ZUiWYShJ+/4oDPVUhQ7TKk1fPX4heqBih30 7rNA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=8bytes.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id d14si897076ote.195.2020.02.19.02.42.34; Wed, 19 Feb 2020 02:42:47 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=8bytes.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726671AbgBSKmR (ORCPT + 99 others); Wed, 19 Feb 2020 05:42:17 -0500 Received: from 8bytes.org ([81.169.241.247]:54872 "EHLO theia.8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726469AbgBSKmQ (ORCPT ); Wed, 19 Feb 2020 05:42:16 -0500 Received: by theia.8bytes.org (Postfix, from userid 1000) id ED39936A; Wed, 19 Feb 2020 11:42:14 +0100 (CET) Date: Wed, 19 Feb 2020 11:42:13 +0100 From: Joerg Roedel To: =?iso-8859-1?Q?J=FCrgen_Gro=DF?= Cc: Andy Lutomirski , Andy Lutomirski , X86 ML , "H. Peter Anvin" , Dave Hansen , Peter Zijlstra , Thomas Hellstrom , Jiri Slaby , Dan Williams , Tom Lendacky , Kees Cook , LKML , kvm list , Linux Virtualization , Joerg Roedel Subject: Re: [PATCH 23/62] x86/idt: Move IDT to data segment Message-ID: <20200219104213.GJ22063@8bytes.org> References: <20200212115516.GE20066@8bytes.org> <879ace44-cee3-98aa-0dff-549b69355096@suse.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <879ace44-cee3-98aa-0dff-549b69355096@suse.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi J?rgen, On Wed, Feb 12, 2020 at 05:28:21PM +0100, J?rgen Gro? wrote: > Xen-PV is clearing BSS as the very first action. In the kernel image? Or in the ELF loader before jumping to the kernel image? Regards, Joerg