From patchwork Sun Aug 14 14:55:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: WANG Xuerui X-Patchwork-Id: 12942907 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 1760DC25B0F for ; Sun, 14 Aug 2022 14:57:30 +0000 (UTC) Received: from localhost ([::1]:41036 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oNF3R-0004cp-5l for qemu-devel@archiver.kernel.org; Sun, 14 Aug 2022 10:57:29 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48096) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oNF28-0002HI-Rq for qemu-devel@nongnu.org; Sun, 14 Aug 2022 10:56:08 -0400 Received: from mail.xen0n.name ([115.28.160.31]:54612 helo=mailbox.box.xen0n.name) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oNF25-0007P8-U5 for qemu-devel@nongnu.org; Sun, 14 Aug 2022 10:56:08 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=xen0n.name; s=mail; t=1660488955; bh=xtOi84D7gwtPt2qpdJhKaRrxyW1/rWu6BSRb/i6isgs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eYVPUZnnunLOumcu1kWPpyTPRuLrB7ItLB8L942cxJdEHjE/TPL9gPzMG9xecEknM y6gVSjmWRZc9dC7X+CEc/fW88DbM/32EZ/nSygofSf1x5iczKb+k7SOXKQlWQZRV+j j69uytOND0V1O0t6Ve7dQCefEQFQjSQ7b00pPH34= Received: from ld50.lan (unknown [101.88.24.16]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mailbox.box.xen0n.name (Postfix) with ESMTPSA id F02266068A; Sun, 14 Aug 2022 22:55:53 +0800 (CST) From: WANG Xuerui To: qemu-devel@nongnu.org Cc: WANG Xuerui , Richard Henderson , Song Gao , Xiaojuan Yang , WANG Xuerui Subject: [PATCH for-7.1 4/4] docs, target/loongarch: Rewrite the LoongArch docs Date: Sun, 14 Aug 2022 22:55:22 +0800 Message-Id: <20220814145522.1474927-5-i.qemu@xen0n.name> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220814145351.1474753-1-git@xen0n.name> References: <20220814145351.1474753-1-git@xen0n.name> MIME-Version: 1.0 Received-SPF: pass client-ip=115.28.160.31; envelope-from=i.qemu@xen0n.name; helo=mailbox.box.xen0n.name X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: WANG Xuerui Much information is already outdated in its current form, not to mention the hard-to-understand Chinglish. Rewrite to hopefully de-duplicate and re-organize things, and reflect the latest status of LoongArch at upstream. Signed-off-by: WANG Xuerui --- docs/system/loongarch/loongson3.rst | 41 ------------ docs/system/loongarch/virt.rst | 41 ++++++++++++ target/loongarch/README | 99 ----------------------------- target/loongarch/README.md | 75 ++++++++++++++++++++++ 4 files changed, 116 insertions(+), 140 deletions(-) delete mode 100644 docs/system/loongarch/loongson3.rst create mode 100644 docs/system/loongarch/virt.rst delete mode 100644 target/loongarch/README create mode 100644 target/loongarch/README.md diff --git a/docs/system/loongarch/loongson3.rst b/docs/system/loongarch/loongson3.rst deleted file mode 100644 index fa3acd01c0..0000000000 --- a/docs/system/loongarch/loongson3.rst +++ /dev/null @@ -1,41 +0,0 @@ -:orphan: - -========================================== -loongson3 virt generic platform (``virt``) -========================================== - -The ``virt`` machine use gpex host bridge, and there are some -emulated devices on virt board, such as loongson7a RTC device, -IOAPIC device, ACPI device and so on. - -Supported devices ------------------ - -The ``virt`` machine supports: -- Gpex host bridge -- Ls7a RTC device -- Ls7a IOAPIC device -- Ls7a ACPI device -- Fw_cfg device -- PCI/PCIe devices -- Memory device -- CPU device. Type: Loongson-3A5000. - -CPU and machine Type --------------------- - -The ``qemu-system-loongarch64`` provides emulation for virt -machine. You can specify the machine type ``virt`` and -cpu type ``Loongson-3A5000``. - -Boot options ------------- - -Now the ``virt`` machine can run test program in ELF format and the -method of compiling is in target/loongarch/README. - -.. code-block:: bash - - $ qemu-system-loongarch64 -machine virt -m 4G -cpu Loongson-3A5000 \ - -smp 1 -kernel hello -monitor none -display none \ - -chardev file,path=hello.out,id=output -serial chardev:output diff --git a/docs/system/loongarch/virt.rst b/docs/system/loongarch/virt.rst new file mode 100644 index 0000000000..2d8f7e1db5 --- /dev/null +++ b/docs/system/loongarch/virt.rst @@ -0,0 +1,41 @@ +:orphan: + +================================================= +LoongArch generic virtualized platform (``virt``) +================================================= + +The ``virt`` machine has a GPEX host bridge, and some more emulated devices +such as the LS7A RTC, IOAPIC, ACPI device and so on. + +Being a machine type designed for virtualized use cases, the machine resembles +a Loongson 3A5000 + LS7A1000 board, but is not an exact emulation. +For example, only cascading of the EXTIOI interrupt is implemented. +Also, only the RTC block of the LS7A1000 is emulated; for the other devices +the QEMU models are used. +Normally you do not need to care about any of these. + +Supported devices +----------------- + +The ``virt`` machine supports: + +- GPEX host bridge +- LS7A RTC device +- LS7A IOAPIC device +- LS7A ACPI device +- fw_cfg device +- PCI/PCIe devices +- Memory device +- CPU device. Defaults to ``qemu64-v1.00``. + +Boot options +------------ + +Some more information could be found in the QEMU sources at +``target/loongarch/README.md``. A simple example being: + +.. code-block:: bash + + $ qemu-system-loongarch64 -machine virt -m 4G -smp 1 -kernel hello \ + -monitor none -display none \ + -chardev file,path=hello.out,id=output -serial chardev:output diff --git a/target/loongarch/README b/target/loongarch/README deleted file mode 100644 index 1823375d04..0000000000 --- a/target/loongarch/README +++ /dev/null @@ -1,99 +0,0 @@ -- Introduction - - LoongArch is the general processor architecture of Loongson. - - The following versions of the LoongArch core are supported - core: 3A5000 - https://github.com/loongson/LoongArch-Documentation/releases/download/2021.08.17/LoongArch-Vol1-v1.00-EN.pdf - - We can get the latest loongarch documents at https://github.com/loongson/LoongArch-Documentation/tags. - - -- System emulation - - Mainly emulate a virt 3A5000 board and ls7a bridge that is not exactly the same as the host. - 3A5000 support multiple interrupt cascading while here we just emulate the extioi interrupt - cascading. LS7A1000 host bridge support multiple devices, such as sata, gmac, uart, rtc - and so on. But we just realize the rtc. Others use the qemu common devices. It does not affect - the general use. We also introduced the emulation of devices at docs/system/loongarch/virt.rst. - - This version only supports running binary files in ELF format, and does not depend on BIOS and kernel file. - You can compile the test program with 'make & make check-tcg' and run the test case with the following command: - - 1. Install LoongArch cross-tools on X86 machines. - - Download cross-tools. - - wget https://github.com/loongson/build-tools/releases/download/2022.05.29/loongarch64-clfs-5.0-cross-tools-gcc-full.tar.xz - - tar -vxf loongarch64-clfs-5.0-cross-tools-gcc-full.tar.xz -C /opt - - Config cross-tools env. - - . setenv.sh - - setenv.sh: - - #!/bin/sh - set -x - CC_PREFIX=/opt/cross-tools - - export PATH=$CC_PREFIX/bin:$PATH - export LD_LIBRARY_PATH=$CC_PREFIX/lib:$LD_LIBRARY_PATH - export LD_LIBRARY_PATH=$CC_PREFIX/loongarch64-unknown-linux-gnu/lib/:$LD_LIBRARY_PATH - set +x - - 2. Test tests/tcg/multiarch. - - ./configure --disable-rdma --disable-pvrdma --prefix=/usr \ - --target-list="loongarch64-softmmu" \ - --disable-libiscsi --disable-libnfs --disable-libpmem \ - --disable-glusterfs --enable-libusb --enable-usb-redir \ - --disable-opengl --disable-xen --enable-spice --disable-werror \ - --enable-debug --disable-capstone --disable-kvm --enable-profiler - - cd build/ - - make && make check-tcg - - or - - ./build/qemu-system-loongarch64 -machine virt -m 4G -cpu Loongson-3A5000 -smp 1 -kernel build/tests/tcg/loongarch64-softmmu/hello -monitor none -display none -chardev file,path=hello.out,id=output -serial chardev:output - -- Linux-user emulation - - We already support Linux user emulation. We can use LoongArch cross-tools to build LoongArch executables on X86 machines, - and We can also use qemu-loongarch64 to run LoongArch executables. - - 1. Config cross-tools env. - - see System emulation. - - 2. Test tests/tcg/multiarch. - - ./configure --static --prefix=/usr --disable-werror --target-list="loongarch64-linux-user" --enable-debug - - cd build - - make && make check-tcg - - 3. Run LoongArch system basic command with loongarch-clfs-system. - - - Config clfs env. - - wget https://github.com/loongson/build-tools/releases/download/2022.05.29/loongarch64-clfs-system-5.0.tar.bz2 - - tar -vxf loongarch64-clfs-system-5.0.tar.bz2 -C /opt/clfs - - cp /opt/clfs/lib64/ld-linux-loongarch-lp64d.so.1 /lib64 - - export LD_LIBRARY_PATH="/opt/clfs/lib64" - - - Run LoongArch system basic command. - - ./qemu-loongarch64 /opt/clfs/usr/bin/bash - ./qemu-loongarch64 /opt/clfs/usr/bin/ls - ./qemu-loongarch64 /opt/clfs/usr/bin/pwd - -- Note. - We can get the latest LoongArch documents or LoongArch tools at https://github.com/loongson/ diff --git a/target/loongarch/README.md b/target/loongarch/README.md new file mode 100644 index 0000000000..6a5ff8acd5 --- /dev/null +++ b/target/loongarch/README.md @@ -0,0 +1,75 @@ +# QEMU LoongArch target + +## Introduction + +LoongArch is the general-purpose instruction set architecture developed by +Loongson. Documentation can be found at [the LoongArch Documentation repository][docs-repo]. + +[docs-repo]: https://github.com/loongson/LoongArch-Documentation + +Currently the following CPU models are supported: + +|`-cpu name`|Description| +|:----------|:----------| +|`qemu64-v1.00`|Virtual model similar to the Loongson 3A5000, compatible with LoongArch64 v1.00.| + +## Trying out + +For some of the steps or development/debug purposes, you may have to set up +cross toolchains if you are not running on native LoongArch hardware. + +Now that LoongArch support has been merged in the GNU toolchain packages and +Linux, you may make your own toolchains like with any other architectures; +Loongson also has made available [their pre-compiled toolchain binaries for x86][build-tools]. +You may follow the respective instructions to set up your development +environment. + +[build-tools]: https://github.com/loongson/build-tools + +### System emulation + +Both raw ELF images and EFI stub kernels together with UEFI firmware image are +supported. + +For running raw ELF images with system emulation: + +```sh +# In the build directory: +./qemu-system-loongarch64 -m 4G -smp 1 \ + -kernel build/tests/tcg/loongarch64-softmmu/hello \ + -monitor none -display none \ + -chardev file,path=hello.out,id=output -serial chardev:output +``` + +For a more complete emulation with UEFI firmware, currently there is no +pre-compiled firmware blob yet, but in the meantime you may compile your own +firmware image with Loongson's forked [EDK II][edk2] and +[corresponding platform code][edk2-plat]. + +[edk2]: https://github.com/loongson/edk2-LoongarchVirt +[edk2-plat]: https://github.com/loongson/edk2-platforms + +Once you have the firmware image in place, you could boot EFI images with it. +For example: + +```sh +./qemu-system-loongarch64 -m 4G smp 4 \ + -bios path/to/your/QEMU_EFI.fd \ + -kernel path/to/your/vmlinux \ + -initrd path/to/your/initramfs/if/you/have/one \ + -append 'root=/dev/ram rdinit=/sbin/init console=ttyS0,115200' + -nographic +``` + +### Linux-user emulation + +Linux-user emulation is fully supported, and there are already several Linux +distributions available with ready-to-use sysroot tarballs, for example +[CLFS][clfs] and [Gentoo][gentoo]. + +You may compile static qemu-user binaries then follow suitable instructions +for your distribution (set up binfmt\_misc, etc.) to make yourself a LoongArch +chroot for experimentation. + +[clfs]: https://github.com/sunhaiyong1978/CLFS-for-LoongArch +[gentoo]: https://wiki.gentoo.org/wiki/Project:LoongArch