linux-kernel - Re: [PATCH] Documentation/kvm : Add documentation on Hypercalls

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Message-ID: <4FCC32F6.1010101@landley.net>
Date:	Sun, 03 Jun 2012 23:00:54 -0500
From:	Rob Landley <rob@...dley.net>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>,
	Alexander Graf <agraf@...e.de>, KVM <kvm@...r.kernel.org>,
	Marcelo Tosatti <mtosatti@...hat.com>,
	Gleb Natapov <gleb@...hat.com>, Ingo Molnar <mingo@...hat.com>,
	Avi Kivity <avi@...hat.com>,
	Jan Kiszka <jan.kiszka@...mens.com>
Subject: Re: [PATCH] Documentation/kvm : Add documentation on Hypercalls

On 05/31/2012 12:46 PM, H. Peter Anvin wrote:
> On 05/31/2012 01:01 AM, Raghavendra K T wrote:
>> +
>> +TODO:
>> +1. more information on input and output needed?
>> +2. Add more detail to purpose of hypercalls.
>>
> 
> 1. definitely, including the hypercall ABI.
> 
> 	-hpa
> 

I was wondering about that. It looks like
Documentation/virtual/kvm/api.txt might cover some of that already in
section 5, but it doesn't look complete...

Also, could I get a 00-INDEX file for this directory explaining what
these individual files are? I think "api.txt" is supposed to be
host-side API for controlling a guest VM (from userspace via ioctls,
looks like), and hypercalls.txt is guest-side API for poking the host.
How someone would write host-side code that _responds_ to a hypercall, I
have no idea.  (It goes in the host kernel?)

Rob



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