linux-kernel - Re: [PATCH 1/3] x86: add io_apic

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Date:	Wed, 28 Mar 2012 11:23:58 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc:	mingo@...e.hu, suresh.b.siddha@...el.com, jwboyer@...hat.com,
	linux-kernel@...r.kernel.org, hpa@...or.com, yinghai@...nel.org,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
Subject: Re: [PATCH 1/3] x86: add io_apic_ops to allow interception


* Konrad Rzeszutek Wilk <konrad.wilk@...cle.com> wrote:

> From: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
> 
> Xen dom0 needs to paravirtualize IO operations to the IO APIC, so add
> a io_apic_ops for it to intercept.  Do this as ops structure because
> there's at least some chance that another paravirtualized environment
> may want to intercept these.
> 
> [ Impact: indirect IO APIC access via io_apic_ops ]
> 
> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
> Acked-by: Suresh Siddha <suresh.b.siddha@...el.com>
> ---
>  arch/x86/include/asm/io_apic.h |    9 +++++++
>  arch/x86/kernel/apic/io_apic.c |   50 +++++++++++++++++++++++++++++++++++++--
>  2 files changed, 56 insertions(+), 3 deletions(-)

Ok, I have applied a cleaned up version of this patch.

The followup patch does not apply anymore - please merge it and 
resubmit.

Thanks,

	Ingo
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