From: Fam Zheng <famz@redhat.com>
To: Peter Xu <peterx@redhat.com>
Cc: qemu-devel@nongnu.org, jasowang@redhat.com, mst@redhat.com,
pbonzini@redhat.com
Subject: Re: [Qemu-devel] [PATCH for-2.9 0/2] VT-d extend GAW to 48 bits
Date: Wed, 7 Dec 2016 16:40:12 +0800 [thread overview]
Message-ID: <20161207084012.GA2286@lemon> (raw)
In-Reply-To: <1481089965-3888-1-git-send-email-peterx@redhat.com>
On Wed, 12/07 13:52, Peter Xu wrote:
> The first patch did some check to make sure the CE GAW bits are always
> valid (it can overflow in old codes, I see it dangerous).
>
> The second patch extended VT-d GAW (Guest Address Width) from 39 bits
> to 48 bits.
>
> Please review. Thanks,
>
> Peter Xu (2):
> intel_iommu: check validity for GAW bits in CE
> intel_iommu: extend supported guest aw to 48 bits
>
> hw/i386/intel_iommu.c | 12 +++++++++++-
> hw/i386/intel_iommu_internal.h | 7 +++++--
> include/hw/i386/intel_iommu.h | 2 +-
> 3 files changed, 17 insertions(+), 4 deletions(-)
>
> --
> 2.7.4
>
This makes "identical mapping" from virtual address to iova possible in a QEMU
VM and I no longer see the "DMAR: intel_iommu_map: iommu width (39) is not
sufficient for the mapped address (55a7d6557000)" error message when doing VFIO
dma mapping.
Tested-by: Fam Zheng <famz@redhat.com>
prev parent reply other threads:[~2016-12-07 8:40 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-07 5:52 [Qemu-devel] [PATCH for-2.9 0/2] VT-d extend GAW to 48 bits Peter Xu
2016-12-07 5:52 ` [Qemu-devel] [PATCH for-2.9 1/2] intel_iommu: check validity for GAW bits in CE Peter Xu
2016-12-08 2:02 ` Jason Wang
2016-12-08 2:16 ` Peter Xu
2016-12-08 2:21 ` Jason Wang
2016-12-12 1:47 ` Peter Xu
2016-12-07 5:52 ` [Qemu-devel] [PATCH for-2.9 2/2] intel_iommu: extend supported guest aw to 48 bits Peter Xu
2016-12-08 2:00 ` Jason Wang
2016-12-11 3:13 ` Michael S. Tsirkin
2016-12-12 2:01 ` Peter Xu
2016-12-12 19:35 ` Alex Williamson
2016-12-13 3:33 ` Peter Xu
2016-12-13 3:51 ` Alex Williamson
2016-12-13 5:24 ` Peter Xu
2016-12-13 5:48 ` Alex Williamson
2016-12-13 6:12 ` Peter Xu
2016-12-13 13:17 ` Alex Williamson
2016-12-13 14:38 ` Michael S. Tsirkin
2016-12-13 5:00 ` Tian, Kevin
2016-12-13 5:31 ` Alex Williamson
2016-12-07 8:40 ` Fam Zheng [this message]
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