From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Alexey Kardashevskiy <aik@ozlabs.ru>
Cc: qemu-devel@nongnu.org,
Alex Williamson <alex.williamson@redhat.com>,
Alex Graf <agraf@suse.de>,
kvm@vger.kernel.org, David Gibson <david@gibson.dropbear.id.au>
Subject: Re: [Qemu-devel] [RFC PATCH] kernel vfio: enabled and supported on power
Date: Sun, 13 May 2012 08:29:43 +1000 [thread overview]
Message-ID: <1336861783.31450.4.camel@pasglop> (raw)
In-Reply-To: <4FAE11D1.9090103@ozlabs.ru>
On Sat, 2012-05-12 at 17:31 +1000, Alexey Kardashevskiy wrote:
> And drivers/vfio/vfio_iommu_x86.c works perfect for POWER except a DMA
> window setup
> which I dropped for now and simply use quite popular configuration on
> power (1Gb DMA window starting
> from 0x0).
>
> As for me, it is too complicated. We do not need either
> - platform specific IOMMU chardev or
> - IOMMU API at all
>
> What do I miss?
I think we want to get rid of the "generic" iommu API and make it x86
specific at this stage. A lot of what the guest is going to do with the
iommu is really platform specific at this stage, especially when we
start adding the EEH functionality, which is PE-based, or when we want
to implement the guest calls for creating dynamic windows.
Cheers,
Ben.
next prev parent reply other threads:[~2012-05-12 22:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-12 7:31 [Qemu-devel] [RFC PATCH] kernel vfio: enabled and supported on power Alexey Kardashevskiy
2012-05-12 22:29 ` Benjamin Herrenschmidt [this message]
2012-05-14 4:04 ` Alex Williamson
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