Deep dive into Kernel

then CPUs are correctly added to system.All you need to do now is write to corresponding sysfs nodes to bring those CPUs online.To automate this process, simply create a `cpu-online.rules` under /etc/udev/rules.d in target domain and tell udev to reload its rules with udevadm control --reload-rules (or restart udevd).Content of `cpu-online.rules`:SUBSYSTEM=="cpu",ACTION=="add",RUN+="/bin/sh -c '..

1. Source download $ git clone git://git.qemu.org/qemu.git 2. Build tool install $ sudo apt-get install pkg-config zlib1g-dev libglib2.0-dev libsdl1.2-dev or$ apt-get build-dep qemu 3. Compile$ cd ${qemu dir} $ ./configure --enable-debug --target-list="x86_64-softmmu" --enable-kvm $ sudo make $ sudo make install

KVM에서 EPT 는 Guest OS가 gfn을 access할 때, VM Exit가 발생하며, 이에 매칭되는 pfn을 생성한다. I have tried to log EPT construction status at VM startup, that is to add some codes in function __direct_map (arch/x86/kvm/mmu.c). __direct_map constructs the EPT paging structure when a guest page firstly touched, and I can get related gfn and pfn here.

[Level 1] VT-d 에 대해서 요약 블로그 http://software.intel.com/en-us/articles/intel-virtualization-technology-for-directed-io-vt-d-enhancing-intel-platforms-for-efficient-virtualization-of-io-devices ## To Know ##ㅇ DMA 동작 원리 - Using DMA : http://www.linuxjournal.com/article/7104- Memory Mapping and DMA : http://lwn.net/images/pdf/LDD3/ch15.pdf ## Manual ##ㅇ Intel VT-d Architecture Specification http://ww..

To implement new QEMU Monitor Protocol:1) define hmp method @ hmp.h2) implement hmp method @ hmp.c3) implement qmp method @ qmp.c ex) (qemu) cpu-add 2

https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Virtualization/

sudo /usr/local/bin/qemu-system-x86_64 -smp 4 -enable-kvm -drive file=vm1.qcow2,format=qcow2,id=drive-virtio-disk0,if=none -device virtio-blk-pci,scsi=on,drive=drive-virtio-disk0 -m 1024 -M q35 -drive file=/ramcache/disk1.qcow2,format=qcow2,id=drive2,if=none -device virtio-blk-pci,scsi=on,drive=drive2 -netdev type=tap,id=net0 -device virtio-net-pci,netdev=net0 Q35 로 부팅하고 싶을 때 boot device를 못찾을 경우..

QEMU 관련 주요 structure 관계도

QEMU에서는 리소스를 모듈처럼 로드해서 사용한다. ㅇ TypeInfo 구조체 정의 struct TypeInfo{ const char *name; const char *parent; size_t instance_size; void (*instance_init)(Object *obj); void (*instance_post_init)(Object *obj); void (*instance_finalize)(Object *obj); bool abstract; size_t class_size; void (*class_init)(ObjectClass *klass, void *data); void (*class_base_init)(ObjectClass *klass, void *data); void (*class_f..

QEMU thread model concept