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Re: [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support
From: |
Joerg Roedel |
Subject: |
Re: [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support |
Date: |
Thu, 15 Jul 2010 16:45:34 +0200 |
User-agent: |
Mutt/1.5.18 (2008-05-17) |
On Thu, Jul 15, 2010 at 07:45:06AM -0500, Anthony Liguori wrote:
> On 07/15/2010 04:10 AM, Joerg Roedel wrote:
>> If this means a seperate interface for device dma accesses and not fold
>> that functionality into the cpu_physical_memory* interface I agree too :-)
>>
> No. PCI devices should never call cpu_physical_memory*.
Fully agreed.
> PCI devices should call pci_memory*.
>
> ISA devices should call isa_memory*.
This is a seperate interface. I like the idea and as you stated below it
has clear advantages, so lets go this way.
> All device memory accesses should go through their respective buses.
> There can be multiple IOMMUs at different levels of the device
> hierarchy. If you don't provide bus-level memory access functions that
> chain through the hierarchy, it's extremely difficult to implement all
> the necessary hooks to perform the translations at different places.
Joerg
- Re: [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support, (continued)
- Re: [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support, Chris Wright, 2010/07/15
- Re: [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support, Avi Kivity, 2010/07/15
- Re: [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support, Chris Wright, 2010/07/15
- Re: [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support, Avi Kivity, 2010/07/15
- Re: [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support, Chris Wright, 2010/07/15
- Re: [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support, Eduard - Gabriel Munteanu, 2010/07/15
- Re: [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support, Joerg Roedel, 2010/07/15
- Re: [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support, Chris Wright, 2010/07/15
- Re: [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support, Joerg Roedel, 2010/07/15
- Re: [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support, Anthony Liguori, 2010/07/15
- Re: [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support,
Joerg Roedel <=
- Re: [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support, Eduard - Gabriel Munteanu, 2010/07/15
- Re: [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support, Anthony Liguori, 2010/07/15
- Re: [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support, Paul Brook, 2010/07/15
- Re: [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support, Anthony Liguori, 2010/07/15
- Re: [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support, Paul Brook, 2010/07/15
- Re: [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support, Eduard - Gabriel Munteanu, 2010/07/14
- Re: [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support, Joerg Roedel, 2010/07/15
- Re: [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support, Paul Brook, 2010/07/15
- Re: [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support, Joerg Roedel, 2010/07/15
- [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support, Eduard - Gabriel Munteanu, 2010/07/14