pc_init1的函数调用关系如下图所示,对于每一个即将创建的VCPU(个数由命令行传入smp_cpus),执行cpu_x86_init,逐层调用后,由qemu_kvm_start_vcpu创建一个VCPU线程,新的VCPU线程将执行qemu_kvm_cpu_thread_fn函数,逐层调用后经过kvm_vcpu_ioctl系统调用切换到核心态,由KVM执行VCPU的创建工作,包括创建VMCS等非根模...
qemu从vl.c/main开始,通过configure_accelerator根据当前current_machine调用对应的accel_init_machine,如果是kvm则具体是kvm_init。当要创建虚拟机,kvm_init函数中会s->fd = qemu_open("/dev/kvm", O_RDWR);打开/dev/kvm设备,获取虚拟机句柄fd,在该fd上ret =kvm_ioctl(s,KVM_CREATE_VM, type); s->vmfd...
/opt/qemu-5.0.0/bin/qemu-system-x86_64 -M q35 -m 16G -smp 8-enable-kvm-vga virtio -cpu host -drive file=vm_img.qcow2,if=virtio -vnc :1 -net nic,model=virtio -net user,hostfwd=tcp::2222-:22 -device ioh3420,id=root_port1,bus=pcie.0 -device x3130-upstream,id=upstream1,bus...
6 kvm_init Main.c (qemu-5.0.0\softmmu) int main(int argc, char **argv, char **envp) { qemu_init(argc, argv, envp); qemu_main_loop(); qemu_cleanup(); return 0; } qemu_init ->configure_accelerators(argv[0]); ->do_configure_accelerator() ->accel_init_machine(accel, current_ma...
QEMU full system emulation features: @itemize @item QEMU uses a full software MMU for maximum portability. @item QEMU can optionally use an in-kernel accelerator, like kqemu and kvm. The accelerators execute some of the guest code natively, while continuing to emulate the rest of the machine....
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The QEMU PC System emulator simulates the following peripherals: - i440FX host PCI bridge and PIIX3 PCI to ISA bridge - Cirrus CLGD 5446 PCI VGA card or dummy VGA
2024/10/16[Stable-9.1.1 42/49] hw/intc/arm_gicv3: Add cast to match the documentationMichael Tokarev 2024/10/16[Stable-9.1.1 38/49] meson: fix machine option for x86_versionMichael Tokarev 2024/10/16Re: [External] Re: [PATCH v6 00/12] Use Intel DSA accelerator to offload zero pa...
When the KVM accelerator is used, it controls the size of the per-vCPU dirty page ring buffer (number of entries for each vCPU). It should be a value that is power of two, and it should be 1024 or bigger (but still less than the maximum value that the kernel supports). 4096 could...
With KVM enabled on a Linux host, a shared memory device is available. Guests map a POSIX shared memory region into the guest as a PCI device that enables zero-copy communication to the application level of the guests. The basic syntax is: @example qemu-system-i386 -device ivshmem...