Messages in this thread | | | Date | Thu, 15 May 2008 10:12:25 +0900 | Subject | Re: [PATCH 0/2] x86: per-device dma_mapping_ops | From | FUJITA Tomonori <> |
| |
On Wed, 14 May 2008 08:49:24 +0300 Muli Ben-Yehuda <muli@il.ibm.com> wrote:
> On Tue, May 13, 2008 at 03:04:50PM +0900, FUJITA Tomonori wrote: > > > This patchset adds per-device dma_mapping_ops support for > > CONFIG_X86_64 like POWER architecture does. This change enables us > > to cleanly fix the Calgary IOMMU issue that some devices are not > > behind the IOMMU [1]. It also would be helpful to handle KVM PCI > > passthrough. > > Awesome! Much needed, thank you for doing this.
No problem. Well, as you know, it's just a base. We need more work to solve the problems on the top of this.
I'd like to have a mechanism to register a hook called when a new pci (or dma capable) device is created. It enables IOMMUs to set up an appropriate dma_mapping_ops per device. It could also enables us to simplify the IOMMUs code to initilize devices at startup (for exmple, intel-iommu checks all the pci devices and creates a domain per device if necessary).
I'll post an updated version against -mm. If people seems to be fine with per-device dma_mapping_ops, then I'll work on further issues.
| |