From: Alex Williamson <alex.williamson@redhat.com>
To: David Kiarie <davidkiarie4@gmail.com>
Cc: qemu-devel@nongnu.org, mst@redhat.com, peterx@redhat.com,
valentine.sinitsyn@gmail.com, jan.kiszka@web.de,
marcel@redhat.com
Subject: Re: [Qemu-devel] [V11 1/4] hw/i386: Introduce AMD IOMMU
Date: Tue, 7 Jun 2016 14:36:50 -0600 [thread overview]
Message-ID: <20160607143650.57f316d9@ul30vt.home> (raw)
In-Reply-To: <1463912514-12658-2-git-send-email-davidkiarie4@gmail.com>
On Sun, 22 May 2016 13:21:51 +0300
David Kiarie <davidkiarie4@gmail.com> wrote:
> Add AMD IOMMU emulaton to Qemu in addition to Intel IOMMU
> The IOMMU does basic translation, error checking and has a
> minimal IOTLB implementation. This IOMMU bypassed the need
> for target aborts by responding with IOMMU_NONE access rights
> and exempts the region 0xfee00000-0xfeefffff from translation
> as it is the q35 interrupt region. We also advertise features
> that are not yet implemented to please the Linux IOMMU driver.
>
> IOTLB aims at implementing commands on real IOMMUs which is
> essential for debugging and may not offer any performance
> benefits
>
> Signed-off-by: David Kiarie <davidkiarie4@gmail.com>
> ---
> hw/i386/Makefile.objs | 1 +
> hw/i386/amd_iommu.c | 1401 +++++++++++++++++++++++++++++++++++++++++++++++++
> hw/i386/amd_iommu.h | 340 ++++++++++++
> include/hw/pci/pci.h | 2 +
> 4 files changed, 1744 insertions(+)
> create mode 100644 hw/i386/amd_iommu.c
> create mode 100644 hw/i386/amd_iommu.h
I don't see any callouts to memory_region_notify_iommu() here, so this
won't yet support assigned devices. Do you have any plans to add that
support? Thanks,
Alex
next prev parent reply other threads:[~2016-06-07 20:37 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-22 10:21 [Qemu-devel] [V11 0/4] AMD IOMMU David Kiarie
2016-05-22 10:21 ` [Qemu-devel] [V11 1/4] hw/i386: Introduce " David Kiarie
2016-05-22 17:47 ` Jan Kiszka
2016-05-22 18:12 ` Jan Kiszka
2016-05-22 18:17 ` Jan Kiszka
2016-05-22 18:48 ` Alex Bennée
2016-05-24 12:35 ` Peter Xu
2016-05-24 13:11 ` David Kiarie
2016-06-07 20:36 ` Alex Williamson [this message]
2016-06-08 5:18 ` Jan Kiszka
2016-05-22 10:21 ` [Qemu-devel] [V11 2/4] hw/i386: ACPI IVRS table David Kiarie
2016-05-24 6:54 ` Peter Xu
2016-05-24 7:06 ` Valentine Sinitsyn
2016-06-18 8:18 ` David Kiarie
2016-06-18 12:32 ` Peter Xu
2016-06-18 12:34 ` Jan Kiszka
2016-06-20 3:36 ` Peter Xu
2016-05-22 10:21 ` [Qemu-devel] [V11 3/4] hw/core: provision for overriding emulated IOMMU David Kiarie
2016-05-24 6:51 ` Peter Xu
2016-05-24 11:49 ` Michael S. Tsirkin
2016-05-24 13:01 ` Jan Kiszka
2016-05-24 14:23 ` Marcel Apfelbaum
2016-05-22 10:21 ` [Qemu-devel] [V11 4/4] hw/pci-host: Emulate AMD IOMMU David Kiarie
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