Hi Yijing,
These devices don't support Phantom Function (PhantFunc 0).
Could you please help to provide full dmesg, /proc/iomem, and ACPI
DMAR table? You may get DMAR table by:
acpidump > acpi.bin
acpixtract -a acpib.bin
iasl -d DMAR.dat
Thanks!
Gerry
On 2014/8/11 11:46, Yijing Wang wrote:
On Mon, 2014-08-11 at 10:54 +0800, Yijing Wang wrote:
> We found some strange devices in HP C7000 and Huawei Server. These devices
> can not be enumerated by OS, but they still did DMA read/write without OS
> management. Because iommu will not create the DMA mapping for these devices,
> the DMA re
On 2014/8/11 11:15, Jiang Liu wrote:
> Hi Yijing,
> Could you please help to provide detail information about the
> PCI device, such as "lscpi -vvv"? It seems like that "Phantom
> Functions" is enabled with these PCI devices.
> Thanks!
> Gerry
My pleasure!
Gerry, the lspci info is below:
H
Hi Yijing,
Could you please help to provide detail information about the
PCI device, such as "lscpi -vvv"? It seems like that "Phantom
Functions" is enabled with these PCI devices.
Thanks!
Gerry
On 2014/8/11 10:54, Yijing Wang wrote:
> We found some strange devices in HP C7000 and Huawei S
We found some strange devices in HP C7000 and Huawei Server. These devices
can not be enumerated by OS, but they still did DMA read/write without OS
management. Because iommu will not create the DMA mapping for these devices,
the DMA read/write will be blocked by iommu hardware.
Eg.
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