linux-kernel - Re: [PATCH] intel_iommu: Disable vfio and kvm interrupt assignment when unsafe

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Message-ID: <20130207113340.GW25591@8bytes.org>
Date:	Thu, 7 Feb 2013 12:33:40 +0100
From:	Joerg Roedel <joro@...tes.org>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	Gleb Natapov <gleb@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, x86@...nel.org,
	"H. Peter Anvin" <hpa@...or.com>,
	Alex Williamson <alex.williamson@...hat.com>,
	Don Zickus <dzickus@...hat.com>,
	Prarit Bhargava <prarit@...hat.com>,
	David Woodhouse <dwmw2@...radead.org>
Subject: Re: [PATCH] intel_iommu: Disable vfio and kvm interrupt assignment
 when unsafe

On Wed, Feb 06, 2013 at 07:08:24PM -0800, Andy Lutomirski wrote:
> -	if (x2apic_present)
> -		WARN(1, KERN_WARNING
> -			"Failed to enable irq remapping.  You are vulnerable to irq-injection attacks.\n");
> -
> +	irq_remapping_is_secure = 0;
>  	return -1;
>  }

Why do you remove this warning? It seems unrelated to the rest of the
patch.


	Joerg


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