Re: systemcalls and kvm ...correct me if I am wrong

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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.

--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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