linux-kernel - Re: [PATCH 0/2] vfio/type1/pci: IOMMU PFNMAP invalidation

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Message-ID: <20200515152251.GB499802@xz-x1>
Date:   Fri, 15 May 2020 11:22:51 -0400
From:   Peter Xu <peterx@...hat.com>
To:     Alex Williamson <alex.williamson@...hat.com>
Cc:     Jason Gunthorpe <jgg@...pe.ca>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, cohuck@...hat.com
Subject: Re: [PATCH 0/2] vfio/type1/pci: IOMMU PFNMAP invalidation

On Thu, May 14, 2020 at 04:55:17PM -0600, Alex Williamson wrote:
> > I'm not if this makes sense, can't we arrange to directly trap the
> > IOMMU failure and route it into qemu if that is what is desired?
> 
> Can't guarantee it, some systems wire that directly into their
> management processor so that they can "protect their users" regardless
> of whether they want or need it.  Yay firmware first error handling,
> *sigh*.  Thanks,

Sorry to be slightly out of topic - Alex, does this mean the general approach
of fault reporting from vfio to the userspace is not gonna work too?

Thanks,

-- 
Peter Xu