Re: dmar pte read access not set error messages on hp dl388 gen8 systems

[Lu Baolu <baolu.lu@linux.intel.com>]

Hi,

On 12/10/19 1:18 PM, Jerry Snitselaar wrote:
> On Mon Dec 09 19, Jerry Snitselaar wrote:
> [snip]
>>
>> A call to iommu_map is failing.
>>
>> [   36.686881] pci 0000:01:00.2: iommu_group_add_device: calling 
>> iommu_group_create_direct_mappings
>> [   36.689843] pci 0000:01:00.2: iommu_group_create_direct_mappings: 
>> iterating through mappings
>> [   36.692757] pci 0000:01:00.2: iommu_group_create_direct_mappings: 
>> calling apply_resv_region
>> [   36.695526] pci 0000:01:00.2: e_direct_mappings: entry type is direct
>> [   37.198053] iommu: iommu_map: ops->map failed iova 0xbddde000 pa 
>> 0x00000000bddde000 pgsize 0x1000
>> [   37.201357] pci 0000:01:00.2: iommu_group_create_direct_mappings: 
>> iommu_map failed
>> [   37.203973] pci 0000:01:00.2: iommu_group_create_direct_mappings: 
>> leaving func
>> [   37.206385] pci 0000:01:00.2: iommu_group_add_device: calling 
>> __iommu_attach_device
>> [   37.208950] pci 0000:01:00.2: Adding to iommu group 25
>> [   37.210660] pci 0000:01:00.2: DMAR: domain->type is dma
>>
> 
> It bails at the dmar_domain->flags & DOMAIN_FLAG_LOSE_CHILDREN check
> at the beginning of intel_iommu_map.  I will verify, but it looks like
> that is getting set when intel_iommu_add_device is called for 01:00.1.
> request_default_domain_for_dev for 01:00.1 will return -EBUSY because
> iommu_group_device_count(group) != 1.

Okay, I will send you a fix patch later. Thanks!

Best regards,
baolu

> 
>> Also fails for 01:00.4:
>>
>> [   37.212448] pci 0000:01:00.4: iommu_group_add_device: calling 
>> iommu_group_create_direct_mappings
>> [   37.215382] pci 0000:01:00.4: iommu_group_create_direct_mappings: 
>> iterating through mappings
>> [   37.218170] pci 0000:01:00.4: iommu_group_create_direct_mappings: 
>> calling apply_resv_region
>> [   37.220933] pci 0000:01:00.4: iommu_group_create_direct_mappings: 
>> entry type is direct-relaxable
>> [   37.223932] iommu: iommu_map: ops->map failed iova 0xbddde000 pa 
>> 0x00000000bddde000 pgsize 0x1000
>> [   37.226857] pci 0000:01:00.4: iommu_group_create_direct_mappings: 
>> iommu_map failed
>> [   37.229300] pci 0000:01:00.4: iommu_group_create_direct_mappings: 
>> leaving func
>> [   37.231648] pci 0000:01:00.4: iommu_group_add_device: calling 
>> __iommu_attach_device
>> [   37.234194] pci 0000:01:00.4: Adding to iommu group 25
>> [   37.236192] pci 0000:01:00.4: DMAR: domain->type is dma
>> [   37.237958] pci 0000:01:00.4: DMAR: device default domain type is 
>> identity. requesting identity domain
>> [   37.241061] pci 0000:01:00.4: don't change mappings of existing 
>> d37.489870] pci 0000:01:00.4: DMAR: Device uses a private identity 
>> domain.
>>
>> There is an RMRR for 0xbddde000-0xddddefff:
>>
>> [63Ah 1594   2]                Subtable Type : 0001 [Reserved Memory 
>> Region]
>> [63Ch 1596   2]                       Length : 0036
>>
>> [63Eh 1598   2]                     Reserved : 0000
>> [640h 1600   2]           PCI Segment Number : 0000
>> [642h 1602   8]                 Base Address : 00000000BDDDE000
>> [64Ah 1610   8]          End Address (limit) : 00000000BDDDEFFF
>>
>> [652h 1618   1]            Device Scope Type : 01 [PCI Endpoint Device]
>> [653h 1619   1]                 Entry Length : 0A
>> [654h 1620   2]                     Reserved : 0000
>> [656h 1622   1]               Enumeration ID : 00
>> [657h 1623   1]               PCI Bus Number : 00
>>
>> [658h 1624   2]                     PCI Path : 1C,07
>>
>> [65Ah 1626   2]                     PCI Path : 00,00
>>
>>
>> [65Ch 1628   1]            Device Scope Type : 01 [PCI Endpoint Device]
>> [65Dh 1629   1]                 Entry Length : 0A
>> [65Eh 1630   2]                     Reserved : 0000
>> [660h 1632   1]               Enumeration ID : 00
>> [661h 1633   1]               PCI Bus Number : 00
>>
>> [662h 1634   2]                     PCI Path : 1C,07
>>
>> [664h 1636   2]                     PCI Path : 00,02
>>
>>
>> [666h 1638   1]            Device Scope Type : 01 [PCI Endpoint Device]
>> [667h 1639   1]                 Entry Length : 0A
>> [668h 1640   2]                     Reserved : 0000
>> [66Ah 1642   1]               Enumeration ID : 00
>> [66Bh 1643   1]               PCI Bus Number : 00
>>
>> [66Ch 1644   2]                     PCI Path : 1C,07
>>
>> [66Eh 1646   2]                     PCI Path : 00,04
>>
> 
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