From: Avi Kivity <avi@redhat.com>
To: Matteo Signorini <signorinimatteo@gmail.com>
Cc: kvm@vger.kernel.org
Subject: Re: systemcalls and kvm ...correct me if I am wrong
Date: Sun, 07 Jun 2009 13:33:38 +0300 [thread overview]
Message-ID: <4A2B9782.1070503@redhat.com> (raw)
In-Reply-To: <bdf5bab30906070302j40669f6dx409251a4da0ef4cb@mail.gmail.com>
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.
next prev parent reply other threads:[~2009-06-07 10:33 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-07 10:02 systemcalls and kvm ...correct me if I am wrong Matteo Signorini
2009-06-07 10:33 ` Avi Kivity [this message]
2009-06-08 12:07 ` Matteo Signorini
2009-06-08 12:11 ` Avi Kivity
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