linux-kernel - Re: [PATCH v3 04/12] Add "handle page fault" PV helper.

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Message-ID: <4B5816B6.9090607@redhat.com>
Date:	Thu, 21 Jan 2010 10:56:22 +0200
From:	Avi Kivity <avi@...hat.com>
To:	Rik van Riel <riel@...hat.com>
CC:	Gleb Natapov <gleb@...hat.com>, "H. Peter Anvin" <hpa@...or.com>,
	Peter Zijlstra <peterz@...radead.org>, kvm@...r.kernel.org,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org, mingo@...e.hu,
	tglx@...utronix.de, cl@...ux-foundation.org
Subject: Re: [PATCH v3 04/12] Add "handle page fault" PV helper.

On 01/20/2010 07:18 PM, Rik van Riel wrote:
> On 01/20/2010 07:00 AM, Avi Kivity wrote:
>> On 01/20/2010 12:02 PM, Gleb Natapov wrote:
>>>
>>> I can inject the event as HW interrupt on vector greater then 32 but 
>>> not
>>> go through APIC so EOI will not be required. This sounds
>>> non-architectural
>>> and I am not sure kernel has entry point code for this kind of 
>>> event, it
>>> has one for exception and one for interrupts that goes through 
>>> __do_IRQ()
>>> which assumes that interrupts should be ACKed.
>>
>> Further, we start to interact with the TPR; Linux doesn't use the TPR or
>> cr8 but if it does one day we don't want it interfering with apf.
>
> That's not an issue is it?  The guest will tell the host what
> vector to use for pseudo page faults.

And kill 15 other vectors?

-- 
error compiling committee.c: too many arguments to function

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