aboutsummaryrefslogtreecommitdiff
path: root/hw/mips/loongson3_virt.c
AgeCommit message (Collapse)AuthorFilesLines
2025-04-25qom: Have class_init() take a const data argumentPhilippe Mathieu-Daudé1-1/+1
Mechanical change using gsed, then style manually adapted to pass checkpatch.pl script. Suggested-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20250424194905.82506-4-philmd@linaro.org>
2025-03-31target/mips: Revert TARGET_PAGE_BITS_VARYRichard Henderson1-1/+0
Revert ee3863b9d41 and a08d60bc6c2b. The logic behind changing the system page size because of what the Loongson kernel "prefers" is flawed. In the Loongson-2E manual, section 5.5, it is clear that the cpu supports a 4k page size (along with many others). Similarly for the Loongson-3 series CPUs, the 4k page size is mentioned in the section 7.7 (PageMask Register). Therefore we must continue to support a 4k page size. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-ID: <20250328175526.368121-2-richard.henderson@linaro.org> [PMD: Mention Loongson-3 series CPUs] Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2025-02-16hw/mips: Mark Loonson3 Virt machine devices as little-endianPhilippe Mathieu-Daudé1-2/+2
The Loonson3 Virt machine is only built as little-endian. Therefore the DEVICE_NATIVE_ENDIAN definition expand to DEVICE_LITTLE_ENDIAN (besides, the DEVICE_BIG_ENDIAN case isn't tested). Simplify directly using DEVICE_LITTLE_ENDIAN. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20250212113938.38692-4-philmd@linaro.org>
2025-02-16hw/boards: Do not create unusable default if=sd drivesPhilippe Mathieu-Daudé1-1/+0
A number of machines create an if=sd drive by default even though they lack an SD bus, and therefore cannot use the drive. This drive is created when the machine sets flag @auto_create_sdcard. See for example running HMP "info block" on the HPPA C3700 machine: $ qemu-system-hppa -M C3700 -monitor stdio -S (qemu) info block floppy0: [not inserted] Removable device: not locked, tray closed sd0: [not inserted] Removable device: not locked, tray closed $ qemu-system-hppa -M C3700 -sd /bin/sh qemu-system-hppa: -sd /bin/sh: machine type does not support if=sd,bus=0,unit=0 Delete that from machines that lack an SD bus. Note, only the ARM and RISCV targets use such feature: $ git grep -wl IF_SD hw | cut -d/ -f-2 | sort -u hw/arm hw/riscv $ Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Message-Id: <20250204200934.65279-5-philmd@linaro.org>
2025-02-16hw/boards: Rename no_sdcard -> auto_create_sdcardPhilippe Mathieu-Daudé1-1/+1
Invert the 'no_sdcard' logic, renaming it as the more explicit "auto_create_sdcard". Machines are supposed to create a SD Card drive when this flag is set. In many cases it doesn't make much sense (as boards don't expose SD Card host controller), but this is patch only aims to expose that nonsense; so no logical change intended (mechanical patch using gsed). Most of the changes are: - mc->no_sdcard = ON_OFF_AUTO_OFF; + mc->auto_create_sdcard = true; Except in . hw/core/null-machine.c . hw/arm/xilinx_zynq.c . hw/s390x/s390-virtio-ccw.c where the disabled option is manually removed (since default): - mc->no_sdcard = ON_OFF_AUTO_ON; + mc->auto_create_sdcard = false; - mc->auto_create_sdcard = false; and in system/vl.c we change the 'default_sdcard' type to boolean. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Message-Id: <20250204200934.65279-4-philmd@linaro.org>
2025-02-16hw/boards: Explicit no_sdcard=false as ON_OFF_AUTO_OFFPhilippe Mathieu-Daudé1-0/+1
Update MachineClass::no_sdcard default implicit AUTO initialization to explicit OFF. This flag is consumed in system/vl.c::qemu_disable_default_devices(). Use this place to assert we don't have anymore AUTO state. In hw/ppc/e500.c we add the ppce500_machine_class_init() method to initialize once all the inherited classes. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Message-Id: <20250204200934.65279-3-philmd@linaro.org>
2025-01-31hw/loader: Pass ELFDATA endian order argument to load_elf()Philippe Mathieu-Daudé1-1/+1
Rather than passing a boolean 'is_big_endian' argument, directly pass the ELFDATA, which can be unspecified using the ELFDATANONE value. Update the call sites: 0 -> ELFDATA2LSB 1 -> ELFDATA2MSB TARGET_BIG_ENDIAN -> TARGET_BIG_ENDIAN ? ELFDATA2MSB : ELFDATA2LSB Suggested-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: BALATON Zoltan <balaton@eik.bme.hu> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20250127113824.50177-7-philmd@linaro.org>
2025-01-31hw/mips/loongson3_virt: Propagate %processor_id to init_boot_param()Philippe Mathieu-Daudé1-4/+3
Propagate %processor_id from mips_loongson3_virt_init() where we have a reference to the first vCPU, so use it instead of the &first_cpu global. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20250115232952.31166-11-philmd@linaro.org>
2025-01-31hw/mips/loongson3_virt: Propagate processor_id to init_loongson_params()Philippe Mathieu-Daudé1-0/+1
Remove one &first_cpu use in hw/mips/loongson3_bootp.c. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20250115232952.31166-10-philmd@linaro.org>
2025-01-31hw/mips/loongson3_virt: Propagate cpu_count to init_boot_param()Philippe Mathieu-Daudé1-4/+3
Remove one use of the 'current_machine' global. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20250115232952.31166-8-philmd@linaro.org>
2025-01-31hw/mips/loongson3: Propagate cpu_count to init_loongson_params()Philippe Mathieu-Daudé1-0/+1
Propagate the %cpu_count from the machine file, allowing to remove the "hw/boards.h" dependency (which is machine specific) from loongson3_bootp. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20250115232952.31166-7-philmd@linaro.org>
2025-01-31hw/mips/loongson3_virt: Pass CPU argument to get_cpu_freq_hz()Philippe Mathieu-Daudé1-3/+3
Pass the first vCPU as argument, allowing to remove another &first_cpu global use. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20250115232952.31166-5-philmd@linaro.org>
2025-01-31hw/mips/loongson3_virt: Have fw_conf_init() access local loaderparamsPhilippe Mathieu-Daudé1-6/+6
'loaderparams' is declared statically. Let fw_conf_init() access its 'cpu_freq' and 'ram_size' fields. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20250115232952.31166-4-philmd@linaro.org>
2025-01-31hw/mips/loongson3_virt: Invert vCPU creation order to remove &first_cpuPhilippe Mathieu-Daudé1-5/+4
Create vCPUs from the last one to the first one. No need to use the &first_cpu global since we already have it referenced. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20250115232952.31166-3-philmd@linaro.org>
2025-01-31hw/mips/loongson3_virt: Factor generic_cpu_reset() outPhilippe Mathieu-Daudé1-9/+17
main_cpu_reset() is misleadingly named "main": it resets all vCPUs, with a special case for the first vCPU. Factor generic_cpu_reset() out of main_cpu_reset(), allowing to remove one &first_cpu use. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20250115232952.31166-2-philmd@linaro.org>
2024-12-30hw/pci-host/gpex: Allow more than 4 legacy IRQsAlexander Graf1-1/+1
Some boards such as vmapple don't do real legacy PCI IRQ swizzling. Instead, they just keep allocating more board IRQ lines for each new legacy IRQ. Let's support that mode by giving instantiators a new "nr_irqs" property they can use to support more than 4 legacy IRQ lines. In this mode, GPEX will export more IRQ lines, one for each device. Signed-off-by: Alexander Graf <graf@amazon.com> Signed-off-by: Phil Dennis-Jordan <phil@philjordan.eu> Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com> Tested-by: Akihiko Odaki <akihiko.odaki@daynix.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-ID: <20241223221645.29911-9-phil@philjordan.eu> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2024-12-20include: Rename sysemu/ -> system/Philippe Mathieu-Daudé1-4/+4
Headers in include/sysemu/ are not only related to system *emulation*, they are also used by virtualization. Rename as system/ which is clearer. Files renamed manually then mechanical change using sed tool. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Tested-by: Lei Yang <leiyang@redhat.com> Message-Id: <20241203172445.28576-1-philmd@linaro.org>
2024-10-15hw/mips: Have mips_cpu_create_with_clock() take an endianness argumentPhilippe Mathieu-Daudé1-1/+1
mips_cpu_create_with_clock() creates a vCPU. Pass it the vCPU endianness requested by argument. Update the board call sites. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Tested-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20241010215015.44326-17-philmd@linaro.org>
2024-10-03hw/char: Extract serial-mmBernhard Beschow1-1/+1
hw/char/serial currently contains the implementation of both TYPE_SERIAL and TYPE_SERIAL_MM. According to serial_class_init(), TYPE_SERIAL is an internal class while TYPE_SERIAL_MM is used by numerous machine types directly. Let's move the latter into its own module which makes the dependencies more obvious and the code more tidy. The includes and the dependencies have been converted mechanically except in the hw/char directories which were updated manually. The result was compile-tested. Now, only hw/char makes direct use of TYPE_SERIAL: # grep -r -e "select SERIAL" | grep -v SERIAL_ hw/char/Kconfig: select SERIAL hw/char/Kconfig: select SERIAL hw/char/Kconfig: select SERIAL hw/char/Kconfig: select SERIAL hw/char/Kconfig: select SERIAL # grep -r -e "/serial\\.h" include/hw/char/serial-mm.h:#include "hw/char/serial.h" hw/char/serial-pci-multi.c:#include "hw/char/serial.h" hw/char/serial.c:#include "hw/char/serial.h" hw/char/serial-isa.c:#include "hw/char/serial.h" hw/char/serial-pci.c:#include "hw/char/serial.h" Tested-by: Andrew Jeffery <andrew@codeconstruct.com.au> Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: Bernhard Beschow <shentey@gmail.com> Link: https://lore.kernel.org/r/20240905073832.16222-4-shentey@gmail.com Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-08-20hw/mips/loongson3_virt: Fix condition of IPI IOCSR connectionJiaxun Yang1-1/+1
>>> CID 1547264: Null pointer dereferences (REVERSE_INULL) >>> Null-checking "ipi" suggests that it may be null, but it has already been dereferenced on all paths leading to the check. Resolves: Coverity CID 1547264 Link: https://lore.kernel.org/qemu-devel/752417ad-ab72-4fed-8d1f-af41f15bc225@app.fastmail.com/ Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-ID: <20240621-loongson3-ipi-follow-v2-2-848eafcbb67e@flygoat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2024-08-20hw/mips/loongson3_virt: Store core_iocsr into LoongsonMachineStateJiaxun Yang1-0/+3
Link: https://lore.kernel.org/qemu-devel/972034d6-23b3-415a-b401-b8bc1cc515c9@linaro.org/ Suggested-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-ID: <20240621-loongson3-ipi-follow-v2-1-848eafcbb67e@flygoat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2024-07-23hw/mips/loongson3_virt: remove useless type castYao Xingtao1-2/+2
The type of kernel_entry, kernel_low and kernel_high is uint64_t, cast the pointer of this type to uint64_t* is useless. Signed-off-by: Yao Xingtao <yaoxt.fnst@fujitsu.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-ID: <20240722091728.4334-2-yaoxt.fnst@fujitsu.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2024-06-19hw/mips/loongson3_virt: Wire up loongson_ipi deviceJiaxun Yang1-2/+37
Wire up loongson_ipi device for loongson3_virt machine, so we can have SMP support for TCG backend as well. Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Acked-by: Song Gao <gaosong@loongson.cn> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-ID: <20240605-loongson3-ipi-v3-3-ddd2c0e03fa3@flygoat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2024-05-09hw/mips/loongson3_virt: Emulate suspend functionJiaxun Yang1-0/+20
Suspend function is emulated as what hardware actually do. Doorbell register fields are updates to include suspend value, suspend vector is encoded in firmware blob and fw_cfg is updated to include S3 bits as what x86 did. Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Message-ID: <20240508-loongson3v-suspend-v1-1-186725524a39@flygoat.com> [PMD: Use g_memdup2(), constify suspend array] Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2024-02-27hw/mips/loongson3_virt: do not require CONFIG_USBPaolo Bonzini1-2/+6
Once the Kconfig for hw/mips is cleaned up, it will be possible to build a binary that does not include any USB host controller and therefore that does not include the code guarded by CONFIG_USB. While the simpler creation functions such as usb_create_simple can be inlined, this is not true of usb_bus_find(). Remove it, replacing it with a search of the single USB bus created by loongson3_virt_devices_init(). Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-ID: <20240223124406.234509-5-pbonzini@redhat.com> [PMD: Fixed style] Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2024-02-02hw/mips/loongson3_virt: use pci_init_nic_devices()David Woodhouse1-3/+1
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> Reviewed-by: Thomas Huth <thuth@redhat.com>
2023-10-19hw/mips: Merge 'hw/mips/cpudevs.h' with 'target/mips/cpu.h'Philippe Mathieu-Daudé1-1/+0
"hw/mips/cpudevs.h" contains declarations which are specific to the MIPS architecture; it doesn't make sense for these to be called from a non-MIPS architecture. Move the declarations to "target/mips/cpu.h". Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20231009171443.12145-2-philmd@linaro.org>
2023-08-22kvm: Introduce kvm_arch_get_default_type hookAkihiko Odaki1-2/+0
kvm_arch_get_default_type() returns the default KVM type. This hook is particularly useful to derive a KVM type that is valid for "none" machine model, which is used by libvirt to probe the availability of KVM. For MIPS, the existing mips_kvm_type() is reused. This function ensures the availability of VZ which is mandatory to use KVM on the current QEMU. Cc: qemu-stable@nongnu.org Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com> Message-id: 20230727073134.134102-2-akihiko.odaki@daynix.com Reviewed-by: Peter Maydell <peter.maydell@linaro.org> [PMM: added doc comment for new function] Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2023-07-25hw/mips: Improve the default USB settings in the loongson3-virt machineThomas Huth1-1/+1
It's possible to compile QEMU without the USB devices (e.g. when using "--without-default-devices" as option for the "configure" script). To be still able to run the loongson3-virt machine in default mode with such a QEMU binary, we have to check here for the availability of the OHCI controller first before instantiating the USB devices. Signed-off-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20230714104903.284845-1-thuth@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2023-07-10hw/mips/loongson3_virt: Relax CPU restrictions for TCGJiaxun Yang1-2/+2
After implemented CPUCFG and CSR, we are now able to boot Linux kernel with Loongson-3A4000 CPU, so there is no point to restrict CPU type to 3A1000 only, instead we just check for presence of INSN_LOONGSON3A. Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Message-Id: <20230521214832.20145-3-jiaxun.yang@flygoat.com> [JY: Check for cpu_type_supports_isa(INSN_LOONGSON3A)] Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2023-07-08hw: Simplify calls to pci_nic_init_nofail()Thomas Huth1-7/+1
pci_nic_init_nofail() calls qemu_find_nic_model(), and this function sets nd->model = g_strdup(default_model) if it has not been initialized yet. So we don't have to set nd->model to the default_nic in the calling sites. Signed-off-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2023-05-26hw/mips: Use MachineClass->default_nic in the virt machinePhilippe Mathieu-Daudé1-1/+3
Mark the default NIC via the new MachineClass->default_nic setting so that the machine-defaults code in vl.c can decide whether the default NIC is usable or not (for example when compiling with the "--without-default-devices" configure switch). Inspired-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20230524122559.28863-1-philmd@linaro.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com>
2022-04-06Remove qemu-common.h include from most unitsMarc-André Lureau1-1/+0
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20220323155743.1585078-33-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-05-02Do not include exec/address-spaces.h if it's not really necessaryThomas Huth1-1/+0
Stop including exec/address-spaces.h in files that don't need it. Signed-off-by: Thomas Huth <thuth@redhat.com> Message-Id: <20210416171314.2074665-5-thuth@redhat.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-05-02Do not include cpu.h if it's not really necessaryThomas Huth1-1/+0
Stop including cpu.h in files that don't need it. Signed-off-by: Thomas Huth <thuth@redhat.com> Message-Id: <20210416171314.2074665-4-thuth@redhat.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-05-02Do not include hw/boards.h if it's not really necessaryThomas Huth1-1/+0
Stop including hw/boards.h in files that don't need it. Signed-off-by: Thomas Huth <thuth@redhat.com> Message-Id: <20210416171314.2074665-3-thuth@redhat.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-05-02hw: Do not include qemu/log.h if it is not necessaryThomas Huth1-1/+0
Many files include qemu/log.h without needing it. Remove the superfluous include statements. Signed-off-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20210328054833.2351597-1-thuth@redhat.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-02-21hw/mips: loongson3: Drop 'struct MemmapEntry'Bin Meng1-3/+3
There is already a MemMapEntry type defined in hwaddr.h. Let's drop the loongson3 defined `struct MemmapEntry` and use the existing one. Signed-off-by: Bin Meng <bin.meng@windriver.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20210122122404.11970-1-bmeng.cn@gmail.com> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2021-01-04hw/mips: Add Loongson-3 machine supportHuacai Chen1-0/+638
Add Loongson-3 based machine support, it use liointc as the interrupt controler and use GPEX as the pci controller. Currently it can work with both TCG and KVM. As the machine model is not based on any exiting physical hardware, the name of the machine is "loongson3-virt". It may be superseded in future by a real machine model. If this happens, then a regular deprecation procedure shall occur for "loongson3-virt" machine. We now already have a full functional Linux kernel (based on Linux-5.4.x LTS) here: https://github.com/chenhuacai/linux Of course the upstream kernel is also usable (the kvm host side and guest side have both been upstream in Linux-5.9): https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git How to use QEMU/Loongson-3? 1, Download kernel source from the above URL; 2, Build a kernel with arch/mips/configs/loongson3_defconfig; 3, Boot a Loongson-3A4000 host with this kernel (for KVM mode); 4, Build QEMU-master with this patchset; 5, modprobe kvm (only necessary for KVM mode); 6, Use QEMU with TCG: qemu-system-mips64el -M loongson3-virt,accel=tcg -cpu Loongson-3A1000 -kernel <path_to_kernel> -append ... Use QEMU with KVM: qemu-system-mips64el -M loongson3-virt,accel=kvm -cpu Loongson-3A4000 -kernel <path_to_kernel> -append ... The "-cpu" parameter is optional here and QEMU will use the correct type for TCG/KVM automatically. Co-developed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@kernel.org> Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Message-Id: <20201221110538.3186646-5-chenhuacai@kernel.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> [PMD: Set TYPE_LOONGSON_MACHINE instance_size in TypeInfo, select FW_CFG_MIPS in Kconfig] Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>