[Virt] [PATCH 0/9] Add riscv kvm accel support

24 Aug 2020

      This series adds both riscv32 and riscv64 kvm support, It is based on
https://gitee.com/openeuler/kernel/tree/kernel-5.5/.

Several steps to use this:
1. Build emulation
$ ./configure --target-list=riscv64-softmmu
$ make -j$(nproc)

2. Build kernel
https://gitee.com/openeuler/kernel/tree/kernel-5.5/

3. Build QEMU VM
cross built in riscv toolchain.
$ PKG_CONFIG_LIBDIR=<toolchain pkgconfig path>
$ export PKG_CONFIG_SYSROOT_DIR=<toolchain sysroot path>
$ ./configure --target-list=riscv64-softmmu --enable-kvm \
--cross-prefix=riscv64-linux-gnu- --disable-libiscsi --disable-glusterfs \
--disable-libusb --disable-usb-redir --audio-drv-list= --disable-opengl \
--disable-libxml2
$ make -j$(nproc)

4. Start emulation
$ ./qemu-system-riscv64 -M virt -m 4096M -cpu rv64,x-h=true -nographic \
        -name guest=riscv-hyp,debug-threads=on \
        -smp 4 \
        -bios ./fw_jump.bin \
        -kernel ./Image \
        -drive file=./hyp.img,format=raw,id=hd0 \
        -device virtio-blk-device,drive=hd0 \
        -append "root=/dev/vda rw console=ttyS0 earlycon=sbi"

5. Start kvm-acceled QEMU VM in emulation
$ ./qemu-system-riscv64 -M virt,accel=kvm -m 1024M -cpu host -nographic \
        -name guest=riscv-guset \
        -smp 2 \
        -bios none \
        -kernel ./Image \
        -drive file=./guest.img,format=raw,id=hd0 \
        -device virtio-blk-device,drive=hd0 \
        -append "root=/dev/vda rw console=ttyS0 earlycon=sbi"

Yifei Jiang (9):
  linux-header: Update linux/kvm.h
  target/riscv: Add target/riscv/kvm.c to place the public kvm interface
  target/riscv: Implement function kvm_arch_init_vcpu
  target/riscv: Implement kvm_arch_get_registers
  target/riscv: Implement kvm_arch_put_registers
  target/riscv: Support start kernel directly by KVM
  hw/riscv: PLIC update external interrupt by KVM when kvm enabled
  target/riscv: Handler KVM_EXIT_RISCV_SBI exit
  target/riscv: add host cpu type

 configure                          |   1 +
 hw/riscv/sifive_plic.c             |  31 +-
 hw/riscv/virt.c                    |  15 +-
 linux-headers/linux/kvm.h          |   8 +
 target/riscv/Makefile.objs         |   1 +
 target/riscv/cpu.c                 |  10 +
 target/riscv/cpu.h                 |   4 +
 target/riscv/kvm.c                 | 501 +++++++++++++++++++++++++++++
 target/riscv/kvm_riscv.h           |  25 ++
 target/riscv/sbi_ecall_interface.h |  72 +++++
 10 files changed, 657 insertions(+), 11 deletions(-)
 create mode 100644 target/riscv/kvm.c
 create mode 100644 target/riscv/kvm_riscv.h
 create mode 100644 target/riscv/sbi_ecall_interface.h

-- 
2.19.1