linux-kernel - Re: [PATCH] vfio: Stop using iommu

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Message-ID: <20220405190411.GT64706@ziepe.ca>
Date:   Tue, 5 Apr 2022 16:04:11 -0300
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     Robin Murphy <robin.murphy@....com>
Cc:     alex.williamson@...hat.com, iommu@...ts.linux-foundation.org,
        cohuck@...hat.com, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org
Subject: Re: [PATCH] vfio: Stop using iommu_present()

On Tue, Apr 05, 2022 at 01:11:54PM +0100, Robin Murphy wrote:
> IOMMU groups have been mandatory for some time now, so a device without
> one is necessarily a device without any usable IOMMU, therefore the
> iommu_present() check is redundant (or at best unhelpful).
> 
> Signed-off-by: Robin Murphy <robin.murphy@....com>
> ---
>  drivers/vfio/vfio.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)

Reviewed-by: Jason Gunthorpe <jgg@...dia.com>

Jason