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 Received: from phobos.denx.de (phobos.denx.de [85.214.62.61]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8C1DBE77197 for ; Thu, 9 Jan 2025 14:56:34 +0000 (UTC) Received: from h2850616.stratoserver.net (localhost [IPv6:::1]) by phobos.denx.de (Postfix) with ESMTP id B7CC78005B; Thu, 9 Jan 2025 15:56:32 +0100 (CET) Authentication-Results: phobos.denx.de; dmarc=pass (p=none dis=none) header.from=konsulko.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de Authentication-Results: phobos.denx.de; dkim=pass (1024-bit key; unprotected) header.d=konsulko.com header.i=@konsulko.com header.b="fCnepTFJ"; dkim-atps=neutral Received: by phobos.denx.de (Postfix, from userid 109) id 0034080107; Thu, 9 Jan 2025 15:56:31 +0100 (CET) Received: from mail-qk1-x730.google.com (mail-qk1-x730.google.com [IPv6:2607:f8b0:4864:20::730]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits)) (No client certificate requested) by phobos.denx.de (Postfix) with ESMTPS id 143C88001F for ; Thu, 9 Jan 2025 15:56:27 +0100 (CET) Authentication-Results: phobos.denx.de; dmarc=pass (p=none dis=none) header.from=konsulko.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=trini@konsulko.com Received: by mail-qk1-x730.google.com with SMTP id af79cd13be357-7b6f95d2eafso99352885a.3 for ; Thu, 09 Jan 2025 06:56:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=konsulko.com; s=google; t=1736434586; x=1737039386; darn=lists.denx.de; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=88QFJ7FndWa2DAxUZeLndShv6LLRuXyCkDG+5mi7eOk=; b=fCnepTFJi8oFt8mgFtBBoYR163/V5+SGy3DDGKocgLb8TXGk/p697KDv6p8WNsoyYR z1+pydB7xmAX1hni71FWiyojvrYgcqw1NenZS6v5FVV3uS13qvN07uil5P/RK4BSmEyv I+e6TywNpE9HppP0b2Pf3Bo6g/dPqSBk+gP5E= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1736434586; x=1737039386; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=88QFJ7FndWa2DAxUZeLndShv6LLRuXyCkDG+5mi7eOk=; b=SsWnhu4MKlprtgjEEk9SGG96wrBnmjNXR0cT/iB7Ayt2gEEJdLGadUS9Dw+kEN9y+f ut9ivMiFL8G+hm76R1CeFJ6uE49+3v1C0DU5KPjJUrIeJ8nkw7GpFziFTLE7DY1eR3se h8yMKmjGJhbDuHNcf+VH2LY/CvoHPIhRKKS2luAVJiioV1xLQVwmGJyUkv2U4cf7giq1 CgrfdsZ/yYGH5rIqsthECAAz/tnO5of1eBGh9/VsngL+WcXEimpYzH7l1isC4qTuHGF2 4mYo6OS0czJg1qp7AHXjgvKRvzsb3U6oUdj6unPgeioLMgTLYZLpz8dHZw013i4cSHCk E05g== X-Forwarded-Encrypted: i=1; AJvYcCW/kczOQCzj76ZO1BWfphahcELNWJH2x3VUmQpWcPf0ai1L7TVnpyR2YwdNb1c6qsrodeAnV84=@lists.denx.de X-Gm-Message-State: AOJu0YzW8b177mOaSMCDGNH8GRaG1zSQTmA3geNiGI11xuW4RULhm6ON GpKOL5LfTiGn8TsXE7V5Xn1rAktr5FY9KL1K65IDGiL3ezxdjqjqx6z7ZEC91Xo= X-Gm-Gg: ASbGnctI+uEpyzGF9y+NFcf6jtNPnOWH/BgWQGo72yozYjd7+Vgv7uRMtaVgNpoAquu 0/EuRzHrmYOukfukwlyIJdJw6C7bShABz6dWYcQKqeuZxrLg5fldQgxeEA5J0BzSWomxHRqsx4X lOtNUW1CvfEoUTAm8eUUqlak9xXLTj9rBFe90LmX1rCcIDiKrxMn2pU7jt20K4Yj1aI+e7IFaId MkdS5JgXCuxdlTLjUCOtvwSjioiHRePAluZ1fuZ/4PZN5g0rYTDzBI= X-Google-Smtp-Source: AGHT+IEnYVsWD6OM2EcMQTbUWdEk8PrDZUgOLqqHOWzNXHYxPgA5KSJuSjmd7MTtE1TFau/GZ58avQ== X-Received: by 2002:a05:620a:2699:b0:7b6:d70a:86d6 with SMTP id af79cd13be357-7bcd9716786mr1110841085a.36.1736434586205; Thu, 09 Jan 2025 06:56:26 -0800 (PST) Received: from bill-the-cat ([187.144.0.100]) by smtp.gmail.com with ESMTPSA id af79cd13be357-7bce3503258sm73439685a.85.2025.01.09.06.56.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 09 Jan 2025 06:56:24 -0800 (PST) Date: Thu, 9 Jan 2025 08:56:20 -0600 From: Tom Rini To: Simon Glass Cc: Heinrich Schuchardt , U-Boot Mailing List , Bin Meng , Caleb Connolly , Ilias Apalodimas , Jiaxun Yang , Marek Vasut , Mattijs Korpershoek , Nathan Barrett-Morrison , Oliver Gaskell , Patrick Rudolph , Robert Marko , Sam Protsenko , Sumit Garg Subject: Re: [PATCH 01/18] scripts: Add a script for building and booting QEMU Message-ID: <20250109145620.GS3476@bill-the-cat> References: <20241112135911.630586-1-sjg@chromium.org> <20241112135911.630586-2-sjg@chromium.org> <1529CE41-E674-400F-BB4E-00C27711F523@gmx.de> <20241113005447.GF3600562@bill-the-cat> <20241115151403.GW3600562@bill-the-cat> <20250106145517.GY3476@bill-the-cat> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="EvCNKSPS32wuvGTx" Content-Disposition: inline In-Reply-To: X-Clacks-Overhead: GNU Terry Pratchett X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.39 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.8 at phobos.denx.de X-Virus-Status: Clean --EvCNKSPS32wuvGTx Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Jan 09, 2025 at 05:36:34AM -0700, Simon Glass wrote: > Hi Tom, >=20 > On Mon, 6 Jan 2025 at 07:55, Tom Rini wrote: > > > > On Fri, Nov 15, 2024 at 09:14:03AM -0600, Tom Rini wrote: > > > On Fri, Nov 15, 2024 at 07:21:47AM -0700, Simon Glass wrote: > > > > Hi Tom, > > > > > > > > On Tue, 12 Nov 2024 at 17:54, Tom Rini wrote: > > > > > > > > > > On Wed, Nov 13, 2024 at 01:49:30AM +0100, Heinrich Schuchardt wro= te: > > > > > > Am 12. November 2024 14:58:54 MEZ schrieb Simon Glass : > > > > > > >It is handy to be able to quickly build and boot a QEMU image = for a > > > > > > >particular architecture and distro. > > > > > > > > > > > > > >Add a script for this purpose. It supports only arm and x86 at= present. > > > > > > >For distros it only supports Ubuntu. Both 32- and 64-bit build= s are > > > > > > >supported. > > > > > > > > > > > > > >Signed-off-by: Simon Glass > > > > > > >--- > > > > > > > > > > > > > > MAINTAINERS | 8 ++ > > > > > > > doc/board/emulation/index.rst | 1 + > > > > > > > doc/board/emulation/script.rst | 61 ++++++++++++ > > > > > > > scripts/build-qemu.sh | 175 ++++++++++++++++++++++++= +++++++++ > > > > > > > 4 files changed, 245 insertions(+) > > > > > > > create mode 100644 doc/board/emulation/script.rst > > > > > > > create mode 100755 scripts/build-qemu.sh > > > > > > > > > > > > > >diff --git a/MAINTAINERS b/MAINTAINERS > > > > > > >index 0399ed1dbf6..b45bb96d5a5 100644 > > > > > > >--- a/MAINTAINERS > > > > > > >+++ b/MAINTAINERS > > > > > > >@@ -1110,6 +1110,14 @@ F: tools/efivar.py > > > > > > > F: tools/file2include.c > > > > > > > F: tools/mkeficapsule.c > > > > > > > > > > > > > >+EMULATION > > > > > > >+M: Simon Glass > > > > > > >+S: Maintained > > > > > > >+W: https://docs.u-boot.org/en/latest/board/emulation/script.= html > > > > > > >+F: configs/qemu_x86* > > > > > > >+F: doc/board/emulation/script.rst > > > > > > >+F: scripts/build-qemu.sh > > > > > > > > > > > > Please, avoid misnomers. This script does not build QEMU. > > > > > > > > > > > > >+ > > > > > > > ENVIRONMENT > > > > > > > M: Joe Hershberger > > > > > > > S: Maintained > > > > > > >diff --git a/doc/board/emulation/index.rst b/doc/board/emulati= on/index.rst > > > > > > >index f8908166276..5a2a00ae225 100644 > > > > > > >--- a/doc/board/emulation/index.rst > > > > > > >+++ b/doc/board/emulation/index.rst > > > > > > >@@ -8,6 +8,7 @@ Emulation > > > > > > > > > > > > > > acpi > > > > > > > blkdev > > > > > > >+ script > > > > > > > qemu-arm > > > > > > > qemu-mips > > > > > > > qemu-ppce500 > > > > > > >diff --git a/doc/board/emulation/script.rst b/doc/board/emulat= ion/script.rst > > > > > > > > > > > > Just another misnomer. This page is not about script.sh. > > > > > > > > > > > > >new file mode 100644 > > > > > > >index 00000000000..23981e333cb > > > > > > >--- /dev/null > > > > > > >+++ b/doc/board/emulation/script.rst > > > > > > >@@ -0,0 +1,61 @@ > > > > > > >+.. SPDX-License-Identifier: GPL-2.0+ > > > > > > > > > > > > This is not a valid SPDX identifier. > > > > > > > > > > > > >+ > > > > > > >+Script for building and running > > > > > > >+=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > > > > > > >+ > > > > > > >+You may find the script `scripts/build-qemu.sh` helpful for b= uilding and testing > > > > > > >+U-Boot on QEMU. > > > > > > >+ > > > > > > >+If uses a environment variables to control how it works: > > > > > > >+ > > > > > > >+ubdir > > > > > > >+ base directory for building U-Boot, with each board being= in its own > > > > > > >+ subdirectory > > > > > > >+ > > > > > > >+imagedir > > > > > > >+ directory containing OS images, containin a subdirectory = for each distro > > > > > > >+ type (e.g. ubuntu/ > > > > > > >+ > > > > > > >+Once configured, you can build and run QEMU for arm64 like th= is:: > > > > > > > > > > > > This downloads the QEMU source and builds it? > > > > > > > > > > > > >+ > > > > > > >+ scripts/build-qemu.sh -rsw > > > > > > >+ > > > > > > >+No support is currently included for specifying a root disk, = so this script can > > > > > > >+only be used to start installers. > > > > > > >+ > > > > > > >+Options > > > > > > >+~~~~~~~ > > > > > > >+ > > > > > > >+Options are available to control the script: > > > > > > >+ > > > > > > >+-a > > > > > > >+ Select architecture (default arm, x86) > > > > > > >+ > > > > > > >+-B > > > > > > >+ Don't build; assume a build exists > > > > > > >+ > > > > > > >+-k > > > > > > >+ Use kvm - kernel-based Virtual Machine. By default QEMU u= ses its own > > > > > > >+ emulator > > > > > > >+ > > > > > > >+-o > > > > > > >+ Run an Operating System. For now this only supports 'ubun= tu'. The name of > > > > > > >+ the OS file must remain unchanged from its standard name = on the Ubuntu > > > > > > >+ website. > > > > > > > > > > > > The U-Boot project should remain open to all operating systems.= How will this work with OpenBSD? > > > > > > > > > > > > Use the URL of the image as argument. > > > > > > > > > > > > >+ > > > > > > >+-r > > > > > > >+ Run QEMU with the image (by default this is not done) > > > > > > >+ > > > > > > >+-R > > > > > > >+ Select OS release (e.g. 24.04). > > > > > > >+ > > > > > > >+-s > > > > > > >+ Use serial only (no display) > > > > > > >+ > > > > > > >+-w > > > > > > >+ Use word version (32-bit). By default, 64-bit is used > > > > > > > > > > > > "word version" is not helpful as explanation. > > > > > > > > > > > > Look at which says a word is 64 bit on a 64-bit system and 16 bit on a 16-b= it system. > > > > > > > > > > > > >+ > > > > > > >+.. note:: > > > > > > >+ > > > > > > >+ Note: For now this is a shell script, but if it expands i= t might be better > > > > > > >+ as Python, accepting the slower startup. > > > > > > >diff --git a/scripts/build-qemu.sh b/scripts/build-qemu.sh > > > > > > >new file mode 100755 > > > > > > >index 00000000000..0ff53593cf9 > > > > > > >--- /dev/null > > > > > > >+++ b/scripts/build-qemu.sh > > > > > > >@@ -0,0 +1,175 @@ > > > > > > >+#!/bin/bash > > > > > > >+# SPDX-License-Identifier: GPL-2.0+ > > > > > > > > > > > > This is not a valid SPDX identifier. > > > > > > > > > > > > >+# > > > > > > >+# Script to build U-Boot suitable for booting with QEMU, poss= ibly running > > > > > > >+# it, possibly with an OS image > > > > > > >+ > > > > > > >+# This just an example. It assumes that > > > > > > >+ > > > > > > >+# - you build U-Boot in ${ubdir}/ where is the U= -Boot board config > > > > > > >+# - your OS images are in ${imagedir}/{distroname}/... > > > > > > >+ > > > > > > >+# So far the script supports only ARM and x86. > > > > > > > > > > > > Why support obsolete i386 but not riscv64? > > > > > > > > > > > > >+ > > > > > > >+set -e > > > > > > >+ > > > > > > >+usage() { > > > > > > >+ ( > > > > > > >+ if [[ -n "$1" ]]; then > > > > > > >+ echo "$1" > > > > > > >+ echo > > > > > > >+ fi > > > > > > >+ echo "Usage: $0 -aBkrsw" > > > > > > >+ echo > > > > > > >+ echo " -a - Select architecture (arm, x86)" > > > > > > >+ echo " -B - Don't build; assume a build exists" > > > > > > >+ echo " -k - Use kvm (kernel-based Virtual Machine)" > > > > > > >+ echo " -o - Run Operating System ('ubuntu' only for n= ow)" > > > > > > >+ echo " -r - Run QEMU with the image" > > > > > > >+ echo " -R - Select OS release (e.g. 24.04)" > > > > > > >+ echo " -s - Use serial only (no display)" > > > > > > >+ echo " -w - Use word version (32-bit)" ) >&2 > > > > > > >+ exit 1 > > > > > > >+} > > > > > > >+ > > > > > > >+# Directory tree for OS images > > > > > > >+imagedir=3D${imagedir-/vid/software/linux} > > > > > > >+ > > > > > > >+# architecture (arm or x86) > > > > > > >+arch=3Darm > > > > > > >+ > > > > > > >+# 32- or 64-bit build > > > > > > >+bitness=3D64 > > > > > > >+ > > > > > > >+# Build U-Boot > > > > > > >+build=3Dyes > > > > > > >+ > > > > > > >+# Extra setings > > > > > > >+extra=3D > > > > > > >+ > > > > > > >+# Operating System to boot (ubuntu) > > > > > > >+os=3D > > > > > > >+ > > > > > > >+release=3D24.04.1 > > > > > > >+ > > > > > > >+# run the image with QEMU > > > > > > >+run=3D > > > > > > >+ > > > > > > >+# run QEMU without a display (U-Boot must be set to stdout=3D= serial) > > > > > > >+serial=3D > > > > > > >+ > > > > > > >+# Use kvm > > > > > > >+kvm=3D > > > > > > >+ > > > > > > >+# Set ubdir to the build directory where you build U-Boot out= -of-tree > > > > > > >+# We avoid in-tree build because it gets confusing trying dif= ferent builds > > > > > > >+ubdir=3D${ubdir-/tmp/b} > > > > > > >+ > > > > > > >+while getopts "a:Bko:rR:sw" opt; do > > > > > > >+ case "${opt}" in > > > > > > >+ a) > > > > > > >+ arch=3D$OPTARG > > > > > > >+ ;; > > > > > > >+ B) > > > > > > >+ build=3D > > > > > > >+ ;; > > > > > > >+ k) > > > > > > >+ kvm=3D"-enable-kvm" > > > > > > >+ ;; > > > > > > >+ o) > > > > > > >+ os=3D$OPTARG > > > > > > >+ > > > > > > >+ # Expand memory and CPUs > > > > > > >+ extra+=3D" -m 4G -smp 4" > > > > > > >+ ;; > > > > > > >+ r) > > > > > > >+ run=3D1 > > > > > > >+ ;; > > > > > > >+ R) > > > > > > >+ release=3D$OPTARG > > > > > > >+ ;; > > > > > > >+ s) > > > > > > >+ serial=3D1 > > > > > > >+ ;; > > > > > > >+ w) > > > > > > >+ bitness=3D32 > > > > > > >+ ;; > > > > > > >+ *) > > > > > > >+ usage > > > > > > >+ ;; > > > > > > >+ esac > > > > > > >+done > > > > > > >+ > > > > > > >+# Build U-Boot for the selected board > > > > > > >+build_u_boot() { > > > > > > >+ buildman -w -o $DIR --board $BOARD -I || exit $? > > > > > > >+} > > > > > > >+ > > > > > > >+# Run QEMU with U-Boot > > > > > > >+run_qemu() { > > > > > > >+ if [[ -n "${os_image}" ]]; then > > > > > > >+ extra+=3D" -drive if=3Dvirtio,file=3D${os_image},= format=3Draw,id=3Dhd0" > > > > > > >+ fi > > > > > > >+ if [[ -n "${serial}" ]]; then > > > > > > >+ extra+=3D" -display none -serial mon:stdio" > > > > > > >+ else > > > > > > >+ extra+=3D" -serial mon:stdio" > > > > > > >+ fi > > > > > > >+ echo "Running ${qemu} ${extra}" > > > > > > >+ "${qemu}" -bios "$DIR/${BIOS}" \ > > > > > > >+ -m 512 \ > > > > > > > > > > > > Ubuntu suggests 4 GiB as minimum for a desktop. > > > > > > > > > > > > >+ -nic none \ > > > > > > > > > > > > Who wants to run without network? > > > > > > Use the virtio nic. > > > > > > > > > > > > >+ ${kvm} \ > > > > > > >+ ${extra} > > > > > > >+} > > > > > > >+ > > > > > > >+# Check architecture > > > > > > >+case "${arch}" in > > > > > > >+arm) > > > > > > >+ BOARD=3D"qemu_arm" > > > > > > >+ BIOS=3D"u-boot.bin" > > > > > > >+ qemu=3Dqemu-system-arm > > > > > > >+ extra+=3D" -machine virt" > > > > > > >+ suffix=3D"arm" > > > > > > >+ if [[ "${bitness}" =3D=3D "64" ]]; then > > > > > > >+ BOARD=3D"qemu_arm64" > > > > > > >+ qemu=3Dqemu-system-aarch64 > > > > > > >+ extra+=3D" -cpu cortex-a57" > > > > > > > > > > > > That CPU is 12 years old and not all distros are stuck on ARM v= 8.0. See . > > > > > > > > > > > > -cpu max works fine with both tcg and kvm. > > > > > > > > > > > > >+ suffix=3D"arm64" > > > > > > > > > > > > >+ fi > > > > > > >+ ;; > > > > > > >+x86) > > > > > > >+ BOARD=3D"qemu-x86" > > > > > > >+ BIOS=3D"u-boot.rom" > > > > > > >+ qemu=3Dqemu-system-i386 > > > > > > >+ suffix=3D"i386" > > > > > > >+ if [[ "${bitness}" =3D=3D "64" ]]; then > > > > > > >+ BOARD=3D"qemu-x86_64" > > > > > > >+ qemu=3Dqemu-system-x86_64 > > > > > > >+ suffix=3D"amd64" > > > > > > >+ fi > > > > > > >+ ;; > > > > > > >+*) > > > > > > >+ usage "Unknown architecture '${arch}'" > > > > > > >+esac > > > > > > >+ > > > > > > >+# Check OS > > > > > > >+case "${os}" in > > > > > > >+ubuntu) > > > > > > >+ os_image=3D"${imagedir}/${os}/${os}-${release}-desktop-${= suffix}.iso" > > > > > > > > > > > > There is no ARM 32-bit Ubuntu desktop. And for i386 there is no= image in 24.04.1. > > > > > > > > > > > > Running a foreign architecture desktop with tcg is not enjoyabl= e. > > > > > > > > > > > > For testing U-Boot a server image is all it takes. > > > > > > > > > > And _all_ of this is why I don't want to add a useful personal sc= ript > > > > > as an additional tool we support. I've seen how much work goes in= to the > > > > > OpenEmbedded runqemu script, we don't have the spare cycles for > > > > > something like that. Doubly so when ultimately I believe we would= be > > > > > well served by having a document that says (in much more words) t= o look > > > > > at u-boot-test-hooks for how to invoke QEMU for a large number of > > > > > architectures and platforms and to then further leverage general = QEMU > > > > > tips and guides on how to run an OS of your choice with that. > > > > > > > > I'm not sure it matters that much. Everyone is going to have their > > > > preference as to how this script should look, but no one else has > > > > taken the time to write one... > > > > > > > > People are free to send patches to enhance it. But I believe it is > > > > helpful, e.g. for repeating problems caused by recent lmb patches. > > > > > > > > Re the test hooks, I just get tired of looking them up and trying to > > > > figure out what to do. Every board name and arch is slightly > > > > different. Just a hassle that I don't need. > > > > > > > > We can put it in scripts/contrib if you like. > > > > > > It's handy to point people to scripts, yes. I frequently point people= at > > > my wrappers around buildman for example for "how do I find code bloat= ?" > > > and similar. But no, I don't think this rises to the level of > > > "scripts/contrib". > > > > Coming back to this question again. I'd be willing to make a new > > top-level repository for "contributor tooling" and also make that more > > widely writable. But I also think you're underestimating the level of > > work required to have a "generic" script here that works on arbitrary > > developer machines. >=20 > Having it in a separate repo seems like too much of a pain, to me. > When things change in U-Boot I would want to update the script (e.g. > to add UPL support, booting Ubuntu and the like). Being external means it's easier to use for bisect'ing problems and you still have to handle UPL / no UPL and so on. --=20 Tom --EvCNKSPS32wuvGTx Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQGzBAABCgAdFiEEGjx/cOCPqxcHgJu/FHw5/5Y0tywFAmd/45EACgkQFHw5/5Y0 tywaLAv/SF7NHZrmgOh6/G2ORrENfFfV5AKBeLcpD5ltAyGBXDYeoq5iG+Y0c4YW iwFLWPB7uxJzdKnt114/HOg8oG4EYyLvBMJCCIDXfwTnJ5CqM4YQc0SddM+eZhTE OPdWxw3+2vAoXQJf81p2PB0yMdaG4f+W+sQke/fxGcXJ9KvFf1bo0sCC9H3qVUoP QOufKEaPbtRdrc0XHivwZ7kG+ZI9QgCDaeKJzBzi8AOcYhkwnVwliqNrR+FN5JUQ H9zmSPV9pbvKYGmE6kl/SdcD6XTzSfv5QBJkRL8tVFRdLcyTikJ8mjL1C+s5NglC sI7HNfckhY5O8/nPCULLaTfuXLPyDMsXhb4OqRpWC+MGVa6gIpy0zstoPabqp9ZL uOBS91VRRaSkPI2YTtIAKLbtlaWE2lmvIS983nQ3yK/SonAFh5AzXYouEdJVMNF/ uz7q7s7PcCwTH7fvenAxA6Lxcr5h3eBsyf0Eu81tKWWL8JD68nbOsXTiaqib3eBr t2hS28Ib =K6AE -----END PGP SIGNATURE----- --EvCNKSPS32wuvGTx--