From: "Jan Beulich" <jbeulich@suse.com>
To: roger.pau@citrix.com
Cc: andrew.cooper3@citrix.com, boris.ostrovsky@oracle.com,
xen-devel@lists.xenproject.org
Subject: Re: [PATCH RFC 4/4] x86/dom0: re-order DMA remapping enabling for PVH Dom0
Date: Fri, 30 Jun 2017 05:52:33 -0600 [thread overview]
Message-ID: <59563B810200007800101949@prv-mh.provo.novell.com> (raw)
In-Reply-To: <20170424115201.96963-5-roger.pau@citrix.com>
>>> Roger Pau Monne <roger.pau@citrix.com> 04/24/17 1:52 PM >>>
>Make sure the reserved regions are setup before enabling the DMA remapping in
>the IOMMU, by calling dom0_setup_permissions before iommu_hwdom_init. Also, in
>order to workaround IOMMU issues seen on pre-Haswell Intel hardware, make sure
>the DMA remapping is enabled after populating Dom0 p2m.
Looks reasonable (especially considering that iommu_hwdom_init() is being called
fairly late in the PV case as well), but please explain the "IOMMU issues seen on
pre-Haswell Intel hardware" a little here (or if it all is mean to refer to what patch 3
does, refer to it).
Jan
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next prev parent reply other threads:[~2017-06-30 11:52 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-24 11:51 [PATCH RFC 0/4] x86/pvh: implement iommu_inclusive_mapping for PVH Dom0 Roger Pau Monne
2017-04-24 11:51 ` [PATCH RFC 1/4] x86/dom0: prevent access to MMCFG areas " Roger Pau Monne
2017-06-30 11:27 ` Jan Beulich
2017-06-30 15:33 ` Roger Pau Monné
2017-07-03 7:06 ` Jan Beulich
2017-04-24 11:51 ` [PATCH RFC 2/4] x86/dom0: prevent PVH Dom0 from mapping read-only the IO APIC area Roger Pau Monne
2017-06-30 11:31 ` Jan Beulich
2017-06-30 15:34 ` Roger Pau Monné
2017-07-03 7:07 ` Jan Beulich
2017-04-24 11:52 ` [PATCH RFC 3/4] x86/vtd: introduce a PVH implementation of iommu_inclusive_mapping Roger Pau Monne
2017-04-24 11:52 ` [PATCH RFC 4/4] x86/dom0: re-order DMA remapping enabling for PVH Dom0 Roger Pau Monne
2017-06-30 11:52 ` Jan Beulich [this message]
2017-06-30 15:35 ` Roger Pau Monné
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