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=-2.4 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 9F32EC2BA83 for ; Fri, 14 Feb 2020 11:32:22 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 66F2F206ED for ; Fri, 14 Feb 2020 11:32:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Xp9vWCC+" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 66F2F206ED Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:37506 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j2ZCn-0006Vl-JM for qemu-devel@archiver.kernel.org; Fri, 14 Feb 2020 06:32:21 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:51798) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j2ZCE-00064M-Me for qemu-devel@nongnu.org; Fri, 14 Feb 2020 06:31:47 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1j2ZCC-0008HE-SS for qemu-devel@nongnu.org; Fri, 14 Feb 2020 06:31:45 -0500 Received: from us-smtp-1.mimecast.com ([205.139.110.61]:38953) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1j2ZCC-0008E3-O0 for qemu-devel@nongnu.org; Fri, 14 Feb 2020 06:31:44 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1581679903; h=from:from:reply-to:subject:subject: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=2kKwne0l91n6b++i5o1pYI7JOMkmZR48qyhHt26Mn8g=; b=Xp9vWCC+/kpy5qzGyN5iS1ZhQXPF2fXW1JER0UUX9gT/snE9jf5uGc8bfRm6gLfndbEpAn PbdXnNSOArCK6M74Fa1RzI6M33c/3QO7Kb2jXjTQWNgTA0AquZnK9EJLnrc1qr6miwb8Uj W+Vs8crEGqbQsiu90ziPjiZYEA6nzSY= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-8-escSIMK4PM2_yB1OGZTOXw-1; Fri, 14 Feb 2020 06:31:38 -0500 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id AF1E713E4; Fri, 14 Feb 2020 11:31:37 +0000 (UTC) Received: from work-vm (unknown [10.36.118.141]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 01A235DA85; Fri, 14 Feb 2020 11:31:36 +0000 (UTC) Date: Fri, 14 Feb 2020 11:31:34 +0000 From: "Dr. David Alan Gilbert" To: Muhui Jiang Subject: Re: Mapping between Host virtual address and guest physical address Message-ID: <20200214113134.GA3329@work-vm> References: MIME-Version: 1.0 In-Reply-To: User-Agent: Mutt/1.13.3 (2020-01-12) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-MC-Unique: escSIMK4PM2_yB1OGZTOXw-1 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Content-Disposition: inline X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 205.139.110.61 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" * Muhui Jiang (jiangmuhui@gmail.com) wrote: > Dear All >=20 > I am recently using qemu-system-arm to boot a linux uImage. >=20 > I would like to do some dynamic instrumentation on the uncompressed kerne= l. > It seems that I need to focus on two key points. >=20 > Firstly, I need to know when the kernel is uncompressed, which means the > compression process is finished. By analyzing the vmlinux.elf and the > trace I can figure it out. >=20 > Secondly, I need to know where the uncompressed is, which means where the > uncompressed linux kernel (Before translated into tcg) stores in the > virtual address of qemu. Does anyone have ideas? Many Thanks There's are some existing HMP monitor commands for this type of debugging: gpa2hpa addr -- print the host physical address corresponding to a guest ph= ysical address gpa2hva addr -- print the host virtual address corresponding to a guest phy= sical address gva2gpa addr -- print the guest physical address corresponding to a guest v= irtual address so I think you're saying you want gpa2hva Dave > Regards > Muhui -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK