linux-kernel - Re: Could anybody give some description about the implement of hyercall in kvm?

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Message-ID: <CAJSP0QW1S87WD2pHZ0xUxTvxpOAxsB-LyOD4skxxziwUCWtkkQ@mail.gmail.com>
Date:	Thu, 12 Jan 2012 09:21:38 +0000
From:	Stefan Hajnoczi <stefanha@...il.com>
To:	Liu ping fan <kernelfans@...il.com>
Cc:	kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Could anybody give some description about the implement of
 hyercall in kvm?

On Thu, Jan 12, 2012 at 4:38 AM, Liu ping fan <kernelfans@...il.com> wrote:
> Could anybody give some description about the implement of hyercall in
> kvm? Or give some links about it?

Try git grep hypercall arch/x86/kvm.

Take a look at arch/x86/kvm/x86.c kvm_set_msr_common() and
kvm_emulate_hypercall().  Some of the KVM time-keeping, minimal HyperV
support, and async page faults live there.  Also see
arch/x86/include/asm/kvm_para.h.

Hypercalls are architecture-specific so if you are interested in ppc
or s390, check those arch directories.

Stefan
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