On Wed, May 4, 2016 at 9:12 AM, Jan Kiszka <jan.kis...@web.de> wrote: > On 2016-04-30 00:42, David Kiarie wrote: >> These series adds AMD IOMMU support to Qemu. It's currently in the 9th >> version. >> >> In this series I have (hopefully) addressed all the comments made in the >> previous version. >> I have also tested and successfully passed-through PCI device 'ac97' with >> more devices to be tested. >> > > I've done some basic testing with a Jailhouse setup and found it > working. The ACPI table is now properly parsed and the DMA remapping was > not disturbing the system after Jailhouse was activated. > > However, it was also still not intervening after I started to corrupt > the configuration, removed DMA target properties from most of the RAM or > dropped PCI devices.
This means you're invalidating DTEs ? > > You are not dropping invalid remapping requests, are you? According to > the logs, you are detecting them at least: > > (amd-iommu)amd_iommu_get_dte: Device Table at 0x3b0d4000 > (amd-iommu)amd_iommu_get_dte: Pte entry at 0x0 is invalid > (amd-iommu)amd_iommu_translate: devid: 00:02.0 gpa 0x32f39480 hpa 0x32f39000 > > It's a bit hard to test right now if remapping is actually properly > working in all important cases if you do not reject invalid ones. > > Jan >
