{"id":3684,"date":"2022-03-08T13:47:57","date_gmt":"2022-03-08T21:47:57","guid":{"rendered":"https:\/\/wonghoi.humgar.com\/blog\/?p=3684"},"modified":"2022-03-08T13:48:20","modified_gmt":"2022-03-08T21:48:20","slug":"qemu-kvm-command-line-notes","status":"publish","type":"post","link":"https:\/\/wonghoi.humgar.com\/blog\/2022\/03\/08\/qemu-kvm-command-line-notes\/","title":{"rendered":"Qemu\/KVM Command Line Notes"},"content":{"rendered":"\n

The executable kvm<\/code> is an alias for (symbolic link to) qemu-system-x86_64<\/code><\/p>\n\n\n\n

KVM is the type 1 hypervisor which can be used by QEMU for speed<\/h2>\n\n\n\n

-accel kvm is the newer way of saying –enable-kvm<\/p>\n\n\n\n

CPU host pass-through for speed<\/h2>\n\n\n\n

-cpu host<\/p>\n\n\n\n

Select boot device (c for HDD, d for cd-rom)<\/h2>\n\n\n\n

-boot d <\/p>\n\n\n\n

Attach IDE optical drive (only one allowed, more needs to me mapped with -drive)<\/h2>\n\n\n\n

-cdrom {iso file or device file}<\/p>\n\n\n\n

SPICE (rdp-like protocol to control virtual machine through IP) recommends qxl video driver<\/h2>\n\n\n\n

-vga qxl<\/p>\n\n\n\n

-spice port={default is 3001},password={cannot start with numbers or it’ll be treated as boolean as it’d be interpreted as numeric}<\/p>\n\n\n\n

Base HDD\/SSD drive: discard=unmap means TRIM for SSD, can add it as a virtio device for speed ONLY AFTER the guest virtio drivers are installed:<\/h2>\n\n\n\n

-drive file={VHD or drive image file},discard=unmap[,if=virtio]<\/p>\n\n\n\n

Speedup by skipping precision clock catchup (HPET)<\/h2>\n\n\n\n

-no-hpet<\/p>\n\n\n\n

Use base=localtime to correct for Linux and Window’s difference in interpreting host RTC’s timezone (Linux assumes that hardware time is UTC+0 while Windows assumed it’s your local time)<\/h2>\n\n\n\n

-rtc base=localtime,clock=host<\/p>\n

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The executable kvm is an alias for (symbolic link to) qemu-system-x86_64 KVM is the type 1 hypervisor which can be used by QEMU for speed -accel kvm is the newer way of saying –enable-kvm CPU host pass-through for speed -cpu … Continue reading →<\/span><\/a><\/p>\n

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