RE: Implement generic double fault generation mechanism

From: "Dong, Eddie" <eddie.dong@intel.com>
To: Gleb Natapov <gleb@redhat.com>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
	Avi Kivity <avi@redhat.com>, "Dong, Eddie" <eddie.dong@intel.com>
Subject: RE: Implement generic double fault generation mechanism
Date: Mon, 11 May 2009 09:04:52 +0800	[thread overview]
Message-ID: <9832F13BD22FB94A829F798DA4A8280501A81A9078@pdsmsx503.ccr.corp.intel.com> (raw)
In-Reply-To: <20090508184417.GA27255@redhat.com>

> There is not point referring to current code. Current code does not
> handle serial exceptions properly. So fix it in your patch otherwise I
> propose to use my patch that fixes current code
> (http://patchwork.kernel.org/patch/21829/).
> 

I would like Avi to decide. As comments to the difference of 2 patches, my undrestanding is that I am addressing the problem base on SDM 5-4 with the answer to serial injection as first in first service. Your patch doesn;t solve generic double fault case for example exception 11 on 11, or GP on GP which needs to be converted to #DF per SDM, rather you only handle the case the secondary exception is PF,  and servicing PF.

I can check with internal architecture to see what does "handle exceptions serially" mean in really. For me serial means first in first out, and thus we should remain 1st exception.

Eddie.