This series adds both riscv32 and riscv64 kvm support, and implements
migration based on riscv. It is based on temporarily unaccepted kvm:
https://github.com/kvm-riscv/linux
Compared to RFC v2, the migration is supported in this series. The new
added migration feature also requires the following patches:
[1]
[PATCH RFC 0/2] Add log dirty support
https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg2284945.html
[2]
[PATCH] target/riscv: raise exception to HS-mode at get_physical_address
https://patchew.org/QEMU/20200824084158.1769-1-jiangyifei@huawei.com/
Several steps to use this:
1. Build emulation
$ ./configure --target-list=riscv64-softmmu
$ make -j$(nproc)
2. Build kernel
https://github.com/kvm-riscv/linux
3. Build QEMU VM
I 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"
This following link describes the details about live migration steps:
https://gitee.com/openeuler/qemu/wikis/Live%20migration?sort_id=2767831
Changes since RFC v2
1. Fix checkpatch error at target/riscv/sbi_ecall_interface.h.
2. Add riscv migration support.
Changes since RFC v1
1. Add separate SBI ecall interface header.
2. Add riscv32 kvm accel support.
Yifei Jiang (14):
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
arget/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
target/riscv: Add sifive_plic vmstate
target/riscv: Support riscv cpu vmstate
target/riscv: Add kvm_riscv_get/put_regs_timer
target/riscv: Implement virtual time adjusting with vm state changing
target/riscv: Support virtual time context synchronization
configure | 1 +
hw/riscv/sifive_plic.c | 55 ++-
hw/riscv/virt.c | 8 +
include/hw/riscv/sifive_plic.h | 1 +
linux-headers/linux/kvm.h | 8 +
target/riscv/cpu.c | 41 +-
target/riscv/cpu.h | 10 +
target/riscv/kvm.c | 599 +++++++++++++++++++++++++++++
target/riscv/kvm_riscv.h | 25 ++
target/riscv/meson.build | 1 +
target/riscv/sbi_ecall_interface.h | 72 ++++
11 files changed, 809 insertions(+), 12 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