docs/system/loongarch: update loongson3.rst and rename it to virt.rst

Since the EDK2 had already support LoongArch, update build bios,
and update cpu type, cross-tools.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20230227035905.1290953-1-gaosong@loongson.cn>

docs/system/loongarch/virt.rst

@@ -19,14 +19,14 @@ The ``virt`` machine supports:
 - Fw_cfg device
 - PCI/PCIe devices
 - Memory device
-- CPU device. Type: la464-loongarch-cpu.
+- CPU device. Type: la464.
 
 CPU and machine Type
 --------------------
 
 The ``qemu-system-loongarch64`` provides emulation for virt
 machine. You can specify the machine type ``virt`` and
-cpu type ``la464-loongarch-cpu``.
+cpu type ``la464``.
 
 Boot options
 ------------
@@ -35,95 +35,74 @@ We can boot the LoongArch virt machine by specifying the uefi bios,
 initrd, and linux kernel. And those source codes and binary files
 can be accessed by following steps.
 
-(1) booting command:
+(1) Build qemu-system-loongarch64:
 
 .. code-block:: bash
 
-  $ qemu-system-loongarch64 -machine virt -m 4G -cpu la464-loongarch-cpu \
+  ./configure --disable-rdma --disable-pvrdma --prefix=/usr \
-      -smp 1 -bios QEMU_EFI.fd -kernel vmlinuz.efi -initrd initrd.img \
-      -append "root=/dev/ram rdinit=/sbin/init console=ttyS0,115200" \
-      --nographic
-
-Note: The running speed may be a little slow, as the performance of our
-qemu and uefi bios is not perfect, and it is being fixed.
-
-(2) cross compiler tools:
-
-.. code-block:: bash
-
-  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
-
-(3) qemu compile configure option:
-
-.. code-block:: bash
-
-  ./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 \
               --enable-debug --disable-capstone --disable-kvm \
               --enable-profiler
-  make
+  make -j8
 
-(4) uefi bios source code and compile method:
+(2) Set cross tools:
 
 .. code-block:: bash
 
-  git clone https://github.com/loongson/edk2-LoongarchVirt.git
+  wget https://github.com/loongson/build-tools/releases/download/2022.09.06/loongarch64-clfs-6.3-cross-tools-gcc-glibc.tar.xz
 
-  cd edk2-LoongarchVirt
+  tar -vxf loongarch64-clfs-6.3-cross-tools-gcc-glibc.tar.xz  -C /opt
 
-  git submodule update --init
+  export PATH=/opt/cross-tools/bin:$PATH
+  export LD_LIBRARY_PATH=/opt/cross-tools/lib:$LD_LIBRARY_PATH
+  export LD_LIBRARY_PATH=/opt/cross-tools/loongarch64-unknown-linux-gnu/lib/:$LD_LIBRARY_PATH
 
-  export PATH=$YOUR_COMPILER_PATH/bin:$PATH
+Note: You need get the latest cross-tools at https://github.com/loongson/build-tools
 
-  export WORKSPACE=`pwd`
+(3) Build BIOS:
 
-  export PACKAGES_PATH=$WORKSPACE/edk2-LoongarchVirt
+    See: https://github.com/tianocore/edk2-platforms/tree/master/Platform/Loongson/LoongArchQemuPkg#readme
 
-  export GCC5_LOONGARCH64_PREFIX=loongarch64-unknown-linux-gnu-
+Note: To build the release version of the bios,  set --buildtarget=RELEASE,
+      the bios file path:  Build/LoongArchQemu/RELEASE_GCC5/FV/QEMU_EFI.fd
 
-  edk2-LoongarchVirt/edksetup.sh
+(4) Build kernel:
-
-  make -C edk2-LoongarchVirt/BaseTools
-
-  build --buildtarget=DEBUG --tagname=GCC5 --arch=LOONGARCH64  --platform=OvmfPkg/LoongArchQemu/Loongson.dsc
-
-  build --buildtarget=RELEASE --tagname=GCC5 --arch=LOONGARCH64  --platform=OvmfPkg/LoongArchQemu/Loongson.dsc
-
-The efi binary file path:
-
-  Build/LoongArchQemu/DEBUG_GCC5/FV/QEMU_EFI.fd
-
-  Build/LoongArchQemu/RELEASE_GCC5/FV/QEMU_EFI.fd
-
-(5) linux kernel source code and compile method:
 
 .. code-block:: bash
 
   git clone https://github.com/loongson/linux.git
 
-  export PATH=$YOUR_COMPILER_PATH/bin:$PATH
+  cd linux
 
-  export LD_LIBRARY_PATH=$YOUR_COMPILER_PATH/lib:$LD_LIBRARY_PATH
+  git checkout loongarch-next
-
-  export LD_LIBRARY_PATH=$YOUR_COMPILER_PATH/loongarch64-unknown-linux-gnu/lib/:$LD_LIBRARY_PATH
 
   make ARCH=loongarch CROSS_COMPILE=loongarch64-unknown-linux-gnu- loongson3_defconfig
 
-  make ARCH=loongarch CROSS_COMPILE=loongarch64-unknown-linux-gnu-
+  make ARCH=loongarch CROSS_COMPILE=loongarch64-unknown-linux-gnu- -j32
-
-  make ARCH=loongarch CROSS_COMPILE=loongarch64-unknown-linux-gnu- install
-
-  make ARCH=loongarch CROSS_COMPILE=loongarch64-unknown-linux-gnu- modules_install
 
 Note: The branch of linux source code is loongarch-next.
+      the kernel file: arch/loongarch/boot/vmlinuz.efi
 
-(6) initrd file:
+(5) Get initrd:
 
   You can use busybox tool and the linux modules to make a initrd file. Or you can access the
   binary files: https://github.com/yangxiaojuan-loongson/qemu-binary
+
+.. code-block:: bash
+
+  git clone https://github.com/yangxiaojuan-loongson/qemu-binary
+
+Note: the initrd file is ramdisk
+
+(6) Booting LoongArch:
+
+.. code-block:: bash
+
+  $ ./build/qemu-system-loongarch64 -machine virt -m 4G -cpu la464 \
+      -smp 1 -bios QEMU_EFI.fd -kernel vmlinuz.efi -initrd ramdisk \
+      -serial stdio   -monitor telnet:localhost:4495,server,nowait \
+      -append "root=/dev/ram rdinit=/sbin/init console=ttyS0,115200" \
+      --nographic