linux-kernel - Re: [PATCH 1/2] kvm: Remove ability to assign a device without iommu support

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Message-ID: <4EF051E3.20101@redhat.com>
Date:	Tue, 20 Dec 2011 11:14:11 +0200
From:	Avi Kivity <avi@...hat.com>
To:	Jan Kiszka <jan.kiszka@...mens.com>
CC:	Sasha Levin <levinsasha928@...il.com>,
	Alex Williamson <alex.williamson@...hat.com>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] kvm: Remove ability to assign a device without iommu
 support

On 12/20/2011 11:12 AM, Jan Kiszka wrote:
> > 
> > Well, Alex suggested skipping deprecation period because there are
> > currently no users of KVM_ASSIGN_PCI_DEVICE without
> > KVM_DEV_ASSIGN_ENABLE_IOMMU, so it should be fine to just make it the
> > default behavior, no?
>
> This iommu-less mode used to "work" for older qemu-kvm version, and I
> think it should still do. Though it makes no sense, I fully agree.
>

It only worked for special kernels that allowed 1:1 gpa/hpa mappings, IIRC.

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

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