From: Kevin O'Connor <kevin@koconnor.net>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: valentine.sinitsyn@gmail.com, qemu-devel@nongnu.org,
crosthwaitepeter@gmail.com, jan.kiszka@web.de, marcel@redhat.com,
David Kiarie <davidkiarie4@gmail.com>
Subject: Re: [Qemu-devel] [V3 3/4] hw/i386: ACPI table for AMD IO MMU
Date: Thu, 14 Jan 2016 11:29:48 -0500 [thread overview]
Message-ID: <20160114162948.GA1901@morn.lan> (raw)
In-Reply-To: <20160114100946.GA13170@redhat.com>
On Thu, Jan 14, 2016 at 12:09:46PM +0200, Michael S. Tsirkin wrote:
> On Thu, Jan 14, 2016 at 11:04:27AM +0300, David Kiarie wrote:
> > Add IVRS table for AMD IO MMU. Also reverve MMIO
>
> reserve?
>
> > region for IO MMU via ACPI
>
>
> It does not look like you reserve anything.
>
> Pls add a link to hardware spec (in
> the device implementation) so we can check
> what does real hardware do.
>
> If this is it:
> http://developer.amd.com/wordpress/media/2012/10/488821.pdf
>
> then the way that works seems to be by guest
> programming the MMIO base.
> We should do the same: patch seabios and EFI to do this.
A similar question - how does a typical factory BIOS select which
address to set as the MMIO base? Is it generally hard-coded or is it
allocated from a range in some way?
-Kevin
next prev parent reply other threads:[~2016-01-14 16:29 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-14 8:04 [Qemu-devel] [V3 0/4] AMD IOMMU David Kiarie
2016-01-14 8:04 ` [Qemu-devel] [V3 1/4] hw/i386: Introduce AMD IO MMU David Kiarie
2016-01-14 8:04 ` [Qemu-devel] [V3 2/4] hw/core: Add AMD IO MMU to machine properties David Kiarie
2016-01-17 13:45 ` Marcel Apfelbaum
2016-01-14 8:04 ` [Qemu-devel] [V3 3/4] hw/i386: ACPI table for AMD IO MMU David Kiarie
2016-01-14 9:56 ` Michael S. Tsirkin
2016-01-14 10:09 ` Michael S. Tsirkin
2016-01-14 12:15 ` David kiarie
2016-01-14 15:39 ` Michael S. Tsirkin
2016-01-14 15:42 ` Jan Kiszka
2016-01-14 16:09 ` David kiarie
2016-01-14 16:19 ` Jan Kiszka
2016-01-14 16:29 ` David kiarie
2016-01-14 16:52 ` Kevin O'Connor
2016-01-14 12:34 ` David kiarie
2016-01-14 16:29 ` Kevin O'Connor [this message]
2016-01-14 16:54 ` Valentine Sinitsyn
2016-01-15 13:52 ` David kiarie
2016-01-14 8:04 ` [Qemu-devel] [V3 4/4] hw/pci-host: Emulate " David Kiarie
2016-01-17 13:57 ` Marcel Apfelbaum
2016-01-18 16:36 ` David Kiarie
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