Hi Joerg,
On 06/01/2017 12:01, Joerg Roedel wrote:
> On Thu, Jan 05, 2017 at 07:04:36PM +0000, Eric Auger wrote:
>> +static void intel_iommu_get_resv_regions(struct device *device,
>> + struct list_head *head)
>> +{
>> + struct iommu_resv_region *reg;
>> +
>> + reg = iommu_alloc_resv_region(IOAPIC_RANGE_START,
>> + IOAPIC_RANGE_END - IOAPIC_RANGE_START + 1,
>> + 0, IOMMU_RESV_NOMAP);
>> + if (!reg)
>> + return;
>> + list_add_tail(®->list, head);
>> +}
>
> That is different from what AMD does, can you also report the RMRR
> regions for the device here (as direct-map regions)?
if I return RMRR regions as direct mapped regions,
iommu_group_create_direct_mappings will perform the 1-1 mapping.
I am not familiar with the intel-iommu code but I guess this job
currently is done in the intel driver:
iommu_prepare_rmrr_dev -> iommu_prepare_identity_map
->domain_prepare_identity_map -> iommu_domain_identity_map?
What is your feeling?
Thanks
Eric
>
>
>
> Joerg
>
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