lcfasad.blogg.se - Qemu vs bochs

#QEMU VS BOCHS UPGRADE#
#QEMU VS BOCHS WINDOWS 10#
#QEMU VS BOCHS SOFTWARE#

The problematic instructions aim at testing the A20 gate by writing and reading memory and by comparing the equality of registers. The problem is that with both of these I end up with crashes created by simple mov instructions. I thought I'd try Bochs or Virtual box instead.

#QEMU VS BOCHS WINDOWS 10#

Now I'm stuck on a Windows 10 machine and Qemu doesn't work well with GDB on this machine. Most other virtualization softare (KVM, VirtualBox, VMWare) however can make use of those extensions and will perform much better if they are available.I'm building a small operating system and was using Qemu before which was working properly. This means that it will always be slow, and it's irrelevent if the hypervisor on the host exposes virtualization extensions to the guest (like KVM does). dynamic translation), but that will be noticably slower.ĮDIT: Bochs, which you mentioned, is a software-only hypervisor.

#QEMU VS BOCHS SOFTWARE#

You can always run a nested VM using a pure software hypervisor (e.g. By 'proper' I mean that the hypervisor exposes virtualization extensions to the guest. I haven't gotten any reliable info on Windows virtualization software concerning proper nested VM support. A search for "KVM nested" should give you enough info to try it yourself.ĮDIT: KVM will run on a Linux host only.

Intel CPUs need the latest KVM Git source code, and only guests with KVM work.

AMD CPUs should work well, guests with Xen and Hyper-V are known to work,.

I've asked on the KVM IRC channel and have gotten the following information (but don't take my word, try it yourself): Linux-KVM has some support for nested virtual machines. Do note that there are still some security issues to be aware of if you do this, so take the appropriate precautions. If we have n virtual machines nested in eachother, this is supported so long as the 1 st to the n-1 th nested guest OS has support for x86 virtualization (the base host must also support it). You will see improved performance if you enable x86 virtualization support on your computer (if your motherboard and CPU support it), and AFAIK, you can "pass through" this feature to multiple nested virtual machines. That being said, if you choose your Linux distros wisely, any modern system should be capable of arbitrary nesting like this.

#QEMU VS BOCHS UPGRADE#

Depending on the requirements of your development, you may require more memory, or an upgrade to a 64-bit "base-host" operating system.

You could simply use Windows as your "base-host" OS, run Linux in a VM, and then use that operating system as the new base-host for Bochs.ĭo note that your only limitation here is your hardware. Each virtual machine is technically "independent" of one another, and with VirtualBox, you could easily do this, since it is supported on both Windows and Linux host operating systems (emulated or not).