Matteo Signorini wrote:
My doubt is:
will int0x80 from Guest userspace bring me into Guest kernel space or
directly into kvm in the Host kernel?
Like I mentioned, guest kernel.
How can I trigger a jump from Guest to Host kvm at will?
mmio/pio/vmcall
Then the way back from host kernel to guest is via vmenter/vmrun or
must be performed in a different way?
The normal way, vmlaunch/vmresume/vmrun.
thanks in advance,
Matteo
2009/6/7 Avi Kivity <avi@xxxxxxxxxx>:
Matteo Signorini wrote:
Hi to all,
correct me if I am wrong but isn't it the following the logical
execution chain of a generic system call performed
in a Kvm guest?
Guest userspace application -> Guest kernel -> Host kernel (kvm) ->
Host userspace (Quemu) -> Host kernel ->
-> Host userspace (Quemu) -> Guest kernel -> Guest userspace application
No. The actual path is
guest userspace -> guest kernel -> guest userspace
The guest kernel might access emulated hardware, but usually it does not.
Is there any detailed documentation on how this happens inside qemu-kvm?
No.
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