[PATCH RFC v1 00/10] Add loongarch kvm accel support

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This series add loongarch kvm support, mainly implement
some interfaces used by kvm such as kvm_arch_get/set_regs,
kvm_arch_handle_exit, kvm_loongarch_set_interrupt, etc.

Currently, we are able to boot LoongArch KVM Linux Guests.
In loongarch VM, mmio devices and iocsr devices are emulated
in user space such as APIC, IPI, pci devices, etc, other
hardwares such as MMU, timer and csr are emulated in kernel.

It is based on temporarily unaccepted linux kvm:
https://github.com/loongson/linux-loongarch-kvm
And We will remove the RFC flag until the linux kvm patches
are merged.

The running environment of LoongArch virt machine:
1. Get the linux source by the above mentioned link.
   git checkout kvm-loongarch
   make ARCH=loongarch CROSS_COMPILE=loongarch64-unknown-linux-gnu- loongson3_defconfig
   make ARCH=loongarch CROSS_COMPILE=loongarch64-unknown-linux-gnu-
2. Get the qemu source: https://github.com/loongson/qemu
   git checkout kvm-loongarch
   ./configure --target-list="loongarch64-softmmu"  --enable-kvm
   make
3. Get uefi bios of LoongArch virt machine:
   Link: https://github.com/tianocore/edk2-platforms/tree/master/Platform/Loongson/LoongArchQemuPkg#readme
4. Also you can access the binary files we have already build:
   https://github.com/yangxiaojuan-loongson/qemu-binary

The command to boot loongarch virt machine:
   $ 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

Tianrui Zhao (10):
  linux-headers: Add KVM headers for loongarch
  target/loongarch: Define some kvm_arch interfaces
  target/loongarch: Supplement vcpu env initial when vcpu reset
  target/loongarch: Implement kvm get/set registers
  target/loongarch: Implement kvm_arch_init function
  target/loongarch: Implement kvm_arch_init_vcpu
  target/loongarch: Implement kvm_arch_handle_exit
  target/loongarch: Implement set vcpu intr for kvm
  target/loongarch: Add kvm-stub.c
  target/loongarch: Add kvm file into meson build

 linux-headers/asm-loongarch/kvm.h |  99 ++++++
 linux-headers/linux/kvm.h         |   9 +
 meson.build                       |   2 +
 target/loongarch/cpu.c            |  21 +-
 target/loongarch/cpu.h            |   3 +
 target/loongarch/kvm-stub.c       |  17 +
 target/loongarch/kvm.c            | 545 ++++++++++++++++++++++++++++++
 target/loongarch/kvm_loongarch.h  |  14 +
 target/loongarch/meson.build      |   1 +
 9 files changed, 706 insertions(+), 5 deletions(-)
 create mode 100644 linux-headers/asm-loongarch/kvm.h
 create mode 100644 target/loongarch/kvm-stub.c
 create mode 100644 target/loongarch/kvm.c
 create mode 100644 target/loongarch/kvm_loongarch.h

-- 
2.31.1




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